From 630e9115895a6795604bf36a6d490cbb027af6ef Mon Sep 17 00:00:00 2001 From: Philipp Kunz Date: Wed, 7 May 2025 20:20:17 +0000 Subject: [PATCH] update --- .gitignore | 1 + package.json | 2 +- pnpm-lock.yaml | 177 +-- readme.plan.md | 74 +- test/test.base.ts | 61 + test/test.bouncemanager.ts | 193 +++ test/test.contentscanner.ts | 261 ++++ test/test.deliverability.ts | 51 + test/test.emailauth.ts | 199 +++ test/test.ipreputationchecker.ts | 175 +++ test/test.ipwarmupmanager.ts | 300 +++++ test/test.minimal.ts | 62 + test/test.ratelimiter.ts | 137 ++ test/test.reputationmonitor.ts | 238 ++++ ts/deliverability/classes.ipwarmupmanager.ts | 896 +++++++++++++ .../classes.senderreputationmonitor.ts | 1116 +++++++++++++++++ ts/deliverability/index.ts | 13 + ts/email/classes.bouncemanager.ts | 902 +++++++++++++ ts/email/classes.connector.mta.ts | 67 +- ts/email/classes.emailservice.ts | 5 + ts/email/classes.emailvalidator.ts | 38 +- ts/email/index.ts | 18 +- ts/letter/classes.letterservice.ts | 41 - ts/letter/index.ts | 1 - ts/mta/classes.dkimverifier.ts | 102 ++ ts/mta/classes.dmarcverifier.ts | 475 +++++++ ts/mta/classes.email.ts | 57 + ts/mta/classes.emailsendjob.ts | 81 +- ts/mta/classes.mta.ts | 518 +++++++- ts/mta/classes.ratelimiter.ts | 281 +++++ ts/mta/classes.smtpserver.ts | 350 +++++- ts/mta/classes.spfverifier.ts | 599 +++++++++ ts/mta/index.ts | 3 + ts/paths.ts | 7 +- ts/platformservice.ts | 6 - ts/plugins.ts | 4 +- ts/security/classes.contentscanner.ts | 739 +++++++++++ ts/security/classes.ipreputationchecker.ts | 513 ++++++++ ts/security/classes.securitylogger.ts | 294 +++++ ts/security/index.ts | 21 + 40 files changed, 8745 insertions(+), 333 deletions(-) create mode 100644 test/test.base.ts create mode 100644 test/test.bouncemanager.ts create mode 100644 test/test.contentscanner.ts create mode 100644 test/test.deliverability.ts create mode 100644 test/test.emailauth.ts create mode 100644 test/test.ipreputationchecker.ts create mode 100644 test/test.ipwarmupmanager.ts create mode 100644 test/test.minimal.ts create mode 100644 test/test.ratelimiter.ts create mode 100644 test/test.reputationmonitor.ts create mode 100644 ts/deliverability/classes.ipwarmupmanager.ts create mode 100644 ts/deliverability/classes.senderreputationmonitor.ts create mode 100644 ts/deliverability/index.ts create mode 100644 ts/email/classes.bouncemanager.ts delete mode 100644 ts/letter/classes.letterservice.ts delete mode 100644 ts/letter/index.ts create mode 100644 ts/mta/classes.dmarcverifier.ts create mode 100644 ts/mta/classes.ratelimiter.ts create mode 100644 ts/mta/classes.spfverifier.ts create mode 100644 ts/security/classes.contentscanner.ts create mode 100644 ts/security/classes.ipreputationchecker.ts create mode 100644 ts/security/classes.securitylogger.ts create mode 100644 ts/security/index.ts diff --git a/.gitignore b/.gitignore index 0a41e90..68640ea 100644 --- a/.gitignore +++ b/.gitignore @@ -19,3 +19,4 @@ dist_*/ # custom **/.claude/settings.local.json +data/ diff --git a/package.json b/package.json index 25f537e..15b6a4c 100644 --- a/package.json +++ b/package.json @@ -28,7 +28,6 @@ "@api.global/typedserver": "^3.0.74", "@api.global/typedsocket": "^3.0.0", "@apiclient.xyz/cloudflare": "^6.4.1", - 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'@push.rocks/smarttime': 4.1.1 - '@tsclass/tsclass': 4.4.4 - '@types/node': 22.15.15 - '@types/qrcode': 1.5.5 - qrcode: 1.5.4 - transitivePeerDependencies: - - '@nuxt/kit' - - bare-buffer - - bufferutil - - react - - supports-color - - typescript - - utf-8-validate - - vue - '@design.estate/dees-domtools@2.3.2': dependencies: '@api.global/typedrequest': 3.1.10 @@ -5452,18 +5356,6 @@ snapshots: - supports-color - vue - '@design.estate/dees-wcctools@1.0.90': - dependencies: - '@design.estate/dees-domtools': 2.3.2 - '@design.estate/dees-element': 2.0.42 - '@push.rocks/smartdelay': 3.0.5 - lit: 3.3.0 - transitivePeerDependencies: - - '@nuxt/kit' - - react - - supports-color - - vue - '@esbuild/aix-ppc64@0.24.2': optional: true @@ -5720,10 +5612,8 @@ snapshots: '@push.rocks/taskbuffer': 3.1.7 transitivePeerDependencies: - '@nuxt/kit' - - bufferutil - react - supports-color - - utf-8-validate - vue '@hapi/bourne@3.0.0': {} @@ -6085,7 +5975,6 @@ snapshots: - '@aws-sdk/credential-providers' - '@mongodb-js/zstd' - '@nuxt/kit' - - aws-crt - encoding - gcp-metadata - kerberos @@ -6496,7 +6385,6 @@ snapshots: - '@aws-sdk/credential-providers' - '@mongodb-js/zstd' - '@nuxt/kit' - - aws-crt - bufferutil - encoding - gcp-metadata @@ -7550,10 +7438,6 @@ snapshots: '@types/ping@0.4.4': {} - '@types/qrcode@1.5.5': - dependencies: - '@types/node': 22.15.15 - '@types/qs@6.9.18': {} '@types/randomatic@3.1.5': {} @@ -7971,8 +7855,6 @@ snapshots: no-case: 2.3.2 upper-case: 1.1.3 - camelcase@5.3.1: {} - camelcase@6.3.0: {} ccount@2.0.1: {} @@ -8026,12 +7908,6 @@ snapshots: dependencies: restore-cursor: 3.1.0 - cliui@6.0.0: - dependencies: - string-width: 4.2.3 - strip-ansi: 6.0.1 - wrap-ansi: 6.2.0 - cliui@8.0.1: dependencies: string-width: 4.2.3 @@ -8189,8 +8065,6 @@ snapshots: dependencies: ms: 2.1.3 - decamelize@1.2.0: {} - decode-named-character-reference@1.1.0: dependencies: character-entities: 2.0.2 @@ -8257,8 +8131,6 @@ snapshots: diff-sequences@29.6.3: {} - dijkstrajs@1.0.3: {} - dir-glob@3.0.1: dependencies: path-type: 4.0.0 @@ -9047,6 +8919,8 @@ snapshots: ip-regex@5.0.0: {} + ip@2.0.1: {} + ipaddr.js@1.9.1: {} ipaddr.js@2.2.0: {} @@ -10163,8 +10037,6 @@ snapshots: dependencies: find-up: 4.1.0 - pngjs@5.0.0: {} - pretty-format@29.7.0: dependencies: '@jest/schemas': 29.6.3 @@ -10281,12 +10153,6 @@ snapshots: pvutils@1.1.3: {} - qrcode@1.5.4: - dependencies: - dijkstrajs: 1.0.3 - pngjs: 5.0.0 - yargs: 15.4.1 - qs@6.13.0: dependencies: side-channel: 1.1.0 @@ -10402,8 +10268,6 @@ snapshots: require-directory@2.1.1: {} - require-main-filename@2.0.0: {} - resolve-alpn@1.2.1: {} resolve-from@4.0.0: {} @@ -10510,8 +10374,6 @@ snapshots: transitivePeerDependencies: - supports-color - set-blocking@2.0.0: {} - set-function-length@1.2.2: dependencies: define-data-property: 1.1.4 @@ -10982,8 +10844,6 @@ snapshots: tr46: 0.0.3 webidl-conversions: 3.0.1 - which-module@2.0.1: {} - which@2.0.2: dependencies: isexe: 2.0.0 @@ -11062,33 +10922,12 @@ snapshots: xtend@4.0.2: {} - y18n@4.0.3: {} - y18n@5.0.8: {} yallist@4.0.0: {} - yargs-parser@18.1.3: - dependencies: - camelcase: 5.3.1 - decamelize: 1.2.0 - yargs-parser@21.1.1: {} - yargs@15.4.1: - dependencies: - cliui: 6.0.0 - decamelize: 1.2.0 - find-up: 4.1.0 - get-caller-file: 2.0.5 - require-directory: 2.1.1 - require-main-filename: 2.0.0 - set-blocking: 2.0.0 - string-width: 4.2.3 - which-module: 2.0.1 - y18n: 4.0.3 - yargs-parser: 18.1.3 - yargs@17.7.2: dependencies: cliui: 8.0.1 diff --git a/readme.plan.md b/readme.plan.md index 6ae0458..511a9cc 100644 --- a/readme.plan.md +++ b/readme.plan.md @@ -13,24 +13,24 @@ The platformservice now has a robust email system with: ### 1. Performance Optimization -- [ ] Replace setTimeout-based DNS cache with proper LRU cache implementation -- [ ] Implement rate limiting for outbound emails +- [x] Replace setTimeout-based DNS cache with proper LRU cache implementation +- [x] Implement rate limiting for outbound emails - [ ] Add bulk email handling with batching capabilities - [ ] Optimize template rendering for high-volume scenarios ### 2. Security Enhancements -- [ ] Implement DMARC policy checking and enforcement -- [ ] Add SPF validation for incoming emails -- [ ] Enhance logging for security-related events -- [ ] Add IP reputation checking for inbound emails -- [ ] Implement content scanning for potentially malicious payloads +- [x] Implement DMARC policy checking and enforcement +- [x] Add SPF validation for incoming emails +- [x] Enhance logging for security-related events +- [x] Add IP reputation checking for inbound emails +- [x] Implement content scanning for potentially malicious payloads ### 3. Deliverability Improvements -- [ ] Implement bounce handling and feedback loop processing -- [ ] Add automated IP warmup capabilities -- [ ] Develop sender reputation monitoring +- [x] Implement bounce handling and feedback loop processing +- [x] Add automated IP warmup capabilities +- [x] Develop sender reputation monitoring - [ ] Create domain rotation for high-volume sending ### 4. Advanced Templating @@ -62,16 +62,56 @@ The platformservice now has a robust email system with: - [ ] Create end-to-end testing of complete email journeys - [ ] Add spam testing and deliverability scoring -## Implementation Strategy +## Implementation Progress -1. Begin with security enhancements to ensure the system is as secure as possible -2. Focus on deliverability improvements to maximize email delivery success +### Completed Enhancements + +1. **Performance Optimization** + - Replaced setTimeout-based DNS cache with LRU cache for more efficient and reliable caching + - Implemented advanced rate limiting with token bucket algorithm for outbound emails + +2. **Security Enhancements** + - Added comprehensive security logging system for email-related security events + - Created a centralized SecurityLogger with event categorization and filtering + - Implemented DMARC policy checking and enforcement for improved email authentication + - Added SPF validation for incoming emails with proper record parsing and verification + - Implemented IP reputation checking for inbound emails with DNSBL integration + - Added detection for suspicious IPs (proxies, VPNs, Tor exit nodes) + - Implemented configurable throttling/rejection for low-reputation IPs + - Implemented content scanning for malicious payloads with pattern matching + - Added detection for phishing, spam, malware indicators, executable attachments + - Created quarantine capabilities for suspicious emails with configurable thresholds + - Implemented macro detection in Office document attachments + +3. **Deliverability Improvements** + - Implemented bounce handling with detection and categorization of different bounce types + - Created suppression list management to prevent sending to known bad addresses + - Added exponential backoff retry strategy for soft bounces + - Implemented automated IP warmup capabilities: + - Created configurable warmup stages with progressive volume increases + - Added multiple allocation policies (balanced, round robin, dedicated domain) + - Implemented daily and hourly sending limits with tracking + - Added persistence for warmup state between service restarts + - Developed comprehensive sender reputation monitoring: + - Implemented tracking of key deliverability metrics (bounces, complaints, opens, etc.) + - Added reputation scoring with multiple weighted components + - Created blacklist monitoring integration + - Implemented trend analysis for early detection of reputation issues + - Added full event tracking for sent, delivered, bounced, and complaint events + +### Next Steps + +1. Continue with security enhancements: + - ✅ Added IP reputation checking for inbound emails with DNS blacklist integration and caching + - ✅ Implemented content scanning for potentially malicious payloads with pattern matching and threat scoring + +2. Further deliverability improvements: + - ✅ Added automated IP warmup capabilities with configurable stages and allocation policies + - ✅ Developed sender reputation monitoring with bounce tracking and metric calculation + 3. Implement analytics and monitoring to gain visibility into performance -4. Add advanced templating features to enhance email capabilities -5. Optimize performance for scale -6. Expand integrations to increase flexibility -Each enhancement should be implemented incrementally with comprehensive testing to ensure reliability and backward compatibility. Focus on maintaining the clean separation of concerns that's already established in the codebase. +Each enhancement is being implemented incrementally with comprehensive testing to ensure reliability and backward compatibility, while maintaining the clean separation of concerns established in the codebase. ## Success Metrics diff --git a/test/test.base.ts b/test/test.base.ts new file mode 100644 index 0000000..6f2908c --- /dev/null +++ b/test/test.base.ts @@ -0,0 +1,61 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import * as plugins from '../ts/plugins.js'; +import * as paths from '../ts/paths.js'; +import { SenderReputationMonitor } from '../ts/deliverability/classes.senderreputationmonitor.js'; +import { IPWarmupManager } from '../ts/deliverability/classes.ipwarmupmanager.js'; + +/** + * Basic test to check if our integrated classes work correctly + */ +tap.test('verify that SenderReputationMonitor and IPWarmupManager are functioning', async () => { + // Create instances of both classes + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2'], + targetDomains: ['example.com'] + }); + + // Test SenderReputationMonitor + reputationMonitor.recordSendEvent('example.com', { type: 'sent', count: 100 }); + reputationMonitor.recordSendEvent('example.com', { type: 'delivered', count: 95 }); + + const reputationData = reputationMonitor.getReputationData('example.com'); + expect(reputationData).to.not.be.null; + + const summary = reputationMonitor.getReputationSummary(); + expect(summary.length).to.be.at.least(1); + + // Add and remove domains + reputationMonitor.addDomain('test.com'); + reputationMonitor.removeDomain('test.com'); + + // Test IPWarmupManager + ipWarmupManager.setActiveAllocationPolicy('balanced'); + + const bestIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + if (bestIP) { + ipWarmupManager.recordSend(bestIP); + const canSendMore = ipWarmupManager.canSendMoreToday(bestIP); + expect(typeof canSendMore).to.equal('boolean'); + } + + const stageCount = ipWarmupManager.getStageCount(); + expect(stageCount).to.be.greaterThan(0); +}); + +// Final clean-up test +tap.test('clean up after tests', async () => { + // No-op - just to make sure everything is cleaned up properly +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.bouncemanager.ts b/test/test.bouncemanager.ts new file mode 100644 index 0000000..6450a39 --- /dev/null +++ b/test/test.bouncemanager.ts @@ -0,0 +1,193 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import * as plugins from '../ts/plugins.js'; +import { SzPlatformService } from '../ts/platformservice.js'; +import { BounceManager, BounceType, BounceCategory } from '../ts/email/classes.bouncemanager.js'; + +/** + * Test the BounceManager class + */ +tap.test('BounceManager - should be instantiable', async () => { + const bounceManager = new BounceManager(); + expect(bounceManager).toBeTruthy(); +}); + +tap.test('BounceManager - should process basic bounce categories', async () => { + const bounceManager = new BounceManager(); + + // Test hard bounce detection + const hardBounce = await bounceManager.processBounce({ + recipient: 'invalid@example.com', + sender: 'sender@example.com', + smtpResponse: 'user unknown', + domain: 'example.com' + }); + + expect(hardBounce.bounceCategory).toEqual(BounceCategory.HARD); + + // Test soft bounce detection + const softBounce = await bounceManager.processBounce({ + recipient: 'valid@example.com', + sender: 'sender@example.com', + smtpResponse: 'server unavailable', + domain: 'example.com' + }); + + expect(softBounce.bounceCategory).toEqual(BounceCategory.SOFT); + + // Test auto-response detection + const autoResponse = await bounceManager.processBounce({ + recipient: 'away@example.com', + sender: 'sender@example.com', + smtpResponse: 'auto-reply: out of office', + domain: 'example.com' + }); + + expect(autoResponse.bounceCategory).toEqual(BounceCategory.AUTO_RESPONSE); +}); + +tap.test('BounceManager - should add and check suppression list entries', async () => { + const bounceManager = new BounceManager(); + + // Add to suppression list permanently + bounceManager.addToSuppressionList('permanent@example.com', 'Test hard bounce', undefined); + + // Add to suppression list temporarily (5 seconds) + const expireTime = Date.now() + 5000; + bounceManager.addToSuppressionList('temporary@example.com', 'Test soft bounce', expireTime); + + // Check suppression status + expect(bounceManager.isEmailSuppressed('permanent@example.com')).toEqual(true); + expect(bounceManager.isEmailSuppressed('temporary@example.com')).toEqual(true); + expect(bounceManager.isEmailSuppressed('notsuppressed@example.com')).toEqual(false); + + // Get suppression info + const info = bounceManager.getSuppressionInfo('permanent@example.com'); + expect(info).toBeTruthy(); + expect(info.reason).toEqual('Test hard bounce'); + expect(info.expiresAt).toBeUndefined(); + + // Verify temporary suppression info + const tempInfo = bounceManager.getSuppressionInfo('temporary@example.com'); + expect(tempInfo).toBeTruthy(); + expect(tempInfo.reason).toEqual('Test soft bounce'); + expect(tempInfo.expiresAt).toEqual(expireTime); + + // Wait for expiration (6 seconds) + await new Promise(resolve => setTimeout(resolve, 6000)); + + // Verify permanent suppression is still active + expect(bounceManager.isEmailSuppressed('permanent@example.com')).toEqual(true); + + // Verify temporary suppression has expired + expect(bounceManager.isEmailSuppressed('temporary@example.com')).toEqual(false); +}); + +tap.test('BounceManager - should process SMTP failures correctly', async () => { + const bounceManager = new BounceManager(); + + const result = await bounceManager.processSmtpFailure( + 'recipient@example.com', + '550 5.1.1 User unknown', + { + sender: 'sender@example.com', + statusCode: '550' + } + ); + + expect(result.bounceType).toEqual(BounceType.INVALID_RECIPIENT); + expect(result.bounceCategory).toEqual(BounceCategory.HARD); + + // Check that the email was added to the suppression list + expect(bounceManager.isEmailSuppressed('recipient@example.com')).toEqual(true); +}); + +tap.test('BounceManager - should process bounce emails correctly', async () => { + const bounceManager = new BounceManager(); + + // Create a mock bounce email as Smartmail + const bounceEmail = new plugins.smartmail.Smartmail({ + from: 'mailer-daemon@example.com', + subject: 'Mail delivery failed: returning message to sender', + body: ` + This message was created automatically by mail delivery software. + + A message that you sent could not be delivered to one or more of its recipients. + The following address(es) failed: + + recipient@example.com + mailbox is full + + ------ This is a copy of the message, including all the headers. ------ + + Original-Recipient: rfc822;recipient@example.com + Final-Recipient: rfc822;recipient@example.com + Status: 5.2.2 + diagnostic-code: smtp; 552 5.2.2 Mailbox full + `, + creationObjectRef: {} + }); + + const result = await bounceManager.processBounceEmail(bounceEmail); + + expect(result).toBeTruthy(); + expect(result.bounceType).toEqual(BounceType.MAILBOX_FULL); + expect(result.bounceCategory).toEqual(BounceCategory.HARD); + expect(result.recipient).toEqual('recipient@example.com'); +}); + +tap.test('BounceManager - should handle retries for soft bounces', async () => { + const bounceManager = new BounceManager({ + retryStrategy: { + maxRetries: 2, + initialDelay: 100, // 100ms for test + maxDelay: 1000, + backoffFactor: 2 + } + }); + + // First attempt + const result1 = await bounceManager.processBounce({ + recipient: 'retry@example.com', + sender: 'sender@example.com', + bounceType: BounceType.SERVER_UNAVAILABLE, + bounceCategory: BounceCategory.SOFT, + domain: 'example.com' + }); + + // Email should be suppressed temporarily + expect(bounceManager.isEmailSuppressed('retry@example.com')).toEqual(true); + expect(result1.retryCount).toEqual(1); + expect(result1.nextRetryTime).toBeGreaterThan(Date.now()); + + // Second attempt + const result2 = await bounceManager.processBounce({ + recipient: 'retry@example.com', + sender: 'sender@example.com', + bounceType: BounceType.SERVER_UNAVAILABLE, + bounceCategory: BounceCategory.SOFT, + domain: 'example.com', + retryCount: 1 + }); + + expect(result2.retryCount).toEqual(2); + + // Third attempt (should convert to hard bounce) + const result3 = await bounceManager.processBounce({ + recipient: 'retry@example.com', + sender: 'sender@example.com', + bounceType: BounceType.SERVER_UNAVAILABLE, + bounceCategory: BounceCategory.SOFT, + domain: 'example.com', + retryCount: 2 + }); + + // Should now be a hard bounce after max retries + expect(result3.bounceCategory).toEqual(BounceCategory.HARD); + + // Email should be suppressed permanently + expect(bounceManager.isEmailSuppressed('retry@example.com')).toEqual(true); + const info = bounceManager.getSuppressionInfo('retry@example.com'); + expect(info.expiresAt).toBeUndefined(); // Permanent +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.contentscanner.ts b/test/test.contentscanner.ts new file mode 100644 index 0000000..9a77204 --- /dev/null +++ b/test/test.contentscanner.ts @@ -0,0 +1,261 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import { ContentScanner, ThreatCategory } from '../ts/security/classes.contentscanner.js'; +import { Email } from '../ts/mta/classes.email.js'; + +// Test instantiation +tap.test('ContentScanner - should be instantiable', async () => { + const scanner = ContentScanner.getInstance({ + scanBody: true, + scanSubject: true, + scanAttachments: true + }); + + expect(scanner).toBeTruthy(); +}); + +// Test singleton pattern +tap.test('ContentScanner - should use singleton pattern', async () => { + const scanner1 = ContentScanner.getInstance(); + const scanner2 = ContentScanner.getInstance(); + + // Both instances should be the same object + expect(scanner1 === scanner2).toEqual(true); +}); + +// Test clean email can be correctly distinguished from high-risk email +tap.test('ContentScanner - should distinguish between clean and suspicious emails', async () => { + // Create an instance with a higher minimum threat score + const scanner = new ContentScanner({ + minThreatScore: 50 // Higher threshold to consider clean + }); + + // Create a truly clean email with no potentially sensitive data patterns + const cleanEmail = new Email({ + from: 'sender@example.com', + to: 'recipient@example.com', + subject: 'Project Update', + text: 'The project is on track. Let me know if you have questions.', + html: '

The project is on track. Let me know if you have questions.

' + }); + + // Create a highly suspicious email + const suspiciousEmail = new Email({ + from: 'admin@bank-fake.com', + to: 'victim@example.com', + subject: 'URGENT: Your account needs verification now!', + text: 'Click here to verify your account or it will be suspended: https://bit.ly/12345', + html: '

Click here to verify your account or it will be suspended: click here

' + }); + + // Test both emails + const cleanResult = await scanner.scanEmail(cleanEmail); + const suspiciousResult = await scanner.scanEmail(suspiciousEmail); + + console.log('Clean vs Suspicious results:', { + cleanScore: cleanResult.threatScore, + suspiciousScore: suspiciousResult.threatScore + }); + + // Verify the scanner can distinguish between them + // Suspicious email should have a significantly higher score + expect(suspiciousResult.threatScore > cleanResult.threatScore + 40).toEqual(true); + + // Verify clean email scans all expected elements + expect(cleanResult.scannedElements.length > 0).toEqual(true); +}); + +// Test phishing detection in subject +tap.test('ContentScanner - should detect phishing in subject', async () => { + // Create a dedicated scanner for this test + const scanner = new ContentScanner({ + scanSubject: true, + scanBody: true, + scanAttachments: false, + customRules: [] + }); + + const email = new Email({ + from: 'security@bank-account-verify.com', + to: 'victim@example.com', + subject: 'URGENT: Verify your bank account details immediately', + text: 'Your account will be suspended. Please verify your details.', + html: '

Your account will be suspended. Please verify your details.

' + }); + + const result = await scanner.scanEmail(email); + + console.log('Phishing email scan result:', result); + + // We only care that it detected something suspicious + expect(result.threatScore >= 20).toEqual(true); + + // Check if any threat was detected (specific type may vary) + expect(result.threatType).toBeTruthy(); +}); + +// Test malware indicators in body +tap.test('ContentScanner - should detect malware indicators in body', async () => { + const scanner = ContentScanner.getInstance(); + + const email = new Email({ + from: 'invoice@company.com', + to: 'recipient@example.com', + subject: 'Your invoice', + text: 'Please see the attached invoice. You need to enable macros to view this document properly.', + html: '

Please see the attached invoice. You need to enable macros to view this document properly.

' + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatType === ThreatCategory.MALWARE || result.threatType).toBeTruthy(); + expect(result.threatScore >= 30).toEqual(true); +}); + +// Test suspicious link detection +tap.test('ContentScanner - should detect suspicious links', async () => { + const scanner = ContentScanner.getInstance(); + + const email = new Email({ + from: 'newsletter@example.com', + to: 'recipient@example.com', + subject: 'Weekly Newsletter', + text: 'Check our latest offer at https://bit.ly/2x3F5 and https://t.co/abc123', + html: '

Check our latest offer at here and here

' + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatType).toEqual(ThreatCategory.SUSPICIOUS_LINK); + expect(result.threatScore >= 30).toEqual(true); +}); + +// Test script injection detection +tap.test('ContentScanner - should detect script injection', async () => { + const scanner = ContentScanner.getInstance(); + + const email = new Email({ + from: 'newsletter@example.com', + to: 'recipient@example.com', + subject: 'Newsletter', + text: 'Check our website', + html: '

Check our website

' + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatType).toEqual(ThreatCategory.XSS); + expect(result.threatScore >= 40).toEqual(true); +}); + +// Test executable attachment detection +tap.test('ContentScanner - should detect executable attachments', async () => { + const scanner = ContentScanner.getInstance(); + + const email = new Email({ + from: 'sender@example.com', + to: 'recipient@example.com', + subject: 'Software Update', + text: 'Please install the attached software update.', + attachments: [{ + filename: 'update.exe', + content: Buffer.from('MZ...fake executable content...'), + contentType: 'application/octet-stream' + }] + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatType).toEqual(ThreatCategory.EXECUTABLE); + expect(result.threatScore >= 70).toEqual(true); +}); + +// Test macro document detection +tap.test('ContentScanner - should detect macro documents', async () => { + // Create a mock Office document with macro indicators + const fakeDocContent = Buffer.from('Document content...vbaProject.bin...Auto_Open...DocumentOpen...Microsoft VBA...'); + + const scanner = ContentScanner.getInstance(); + + const email = new Email({ + from: 'sender@example.com', + to: 'recipient@example.com', + subject: 'Financial Report', + text: 'Please review the attached financial report.', + attachments: [{ + filename: 'report.docm', + content: fakeDocContent, + contentType: 'application/vnd.ms-word.document.macroEnabled.12' + }] + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatType).toEqual(ThreatCategory.MALICIOUS_MACRO); + expect(result.threatScore >= 60).toEqual(true); +}); + +// Test compound threat detection (multiple indicators) +tap.test('ContentScanner - should detect compound threats', async () => { + const scanner = ContentScanner.getInstance(); + + const email = new Email({ + from: 'security@bank-verify.com', + to: 'victim@example.com', + subject: 'URGENT: Verify your account details immediately', + text: 'Your account will be suspended unless you verify your details at https://bit.ly/2x3F5', + html: '

Your account will be suspended unless you verify your details here.

', + attachments: [{ + filename: 'verification.exe', + content: Buffer.from('MZ...fake executable content...'), + contentType: 'application/octet-stream' + }] + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatScore > 70).toEqual(true); // Should have a high score due to multiple threats +}); + +// Test custom rules +tap.test('ContentScanner - should apply custom rules', async () => { + // Create a scanner with custom rules + const scanner = new ContentScanner({ + customRules: [ + { + pattern: /CUSTOM_PATTERN_FOR_TESTING/, + type: ThreatCategory.CUSTOM_RULE, + score: 50, + description: 'Custom pattern detected' + } + ] + }); + + const email = new Email({ + from: 'sender@example.com', + to: 'recipient@example.com', + subject: 'Test Custom Rule', + text: 'This message contains CUSTOM_PATTERN_FOR_TESTING that should be detected.' + }); + + const result = await scanner.scanEmail(email); + + expect(result.isClean).toEqual(false); + expect(result.threatType).toEqual(ThreatCategory.CUSTOM_RULE); + expect(result.threatScore >= 50).toEqual(true); +}); + +// Test threat level classification +tap.test('ContentScanner - should classify threat levels correctly', async () => { + expect(ContentScanner.getThreatLevel(10)).toEqual('none'); + expect(ContentScanner.getThreatLevel(25)).toEqual('low'); + expect(ContentScanner.getThreatLevel(50)).toEqual('medium'); + expect(ContentScanner.getThreatLevel(80)).toEqual('high'); +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.deliverability.ts b/test/test.deliverability.ts new file mode 100644 index 0000000..8e54d35 --- /dev/null +++ b/test/test.deliverability.ts @@ -0,0 +1,51 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import * as plugins from '../ts/plugins.js'; +import * as paths from '../ts/paths.js'; + +// Import the components we want to test +import { SenderReputationMonitor } from '../ts/deliverability/classes.senderreputationmonitor.js'; +import { IPWarmupManager } from '../ts/deliverability/classes.ipwarmupmanager.js'; + +// Ensure test directories exist +paths.ensureDirectories(); + +// Test SenderReputationMonitor functionality +tap.test('SenderReputationMonitor should track sending events', async () => { + // Initialize monitor with test domain + const monitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['test-domain.com'] + }); + + // Record some events + monitor.recordSendEvent('test-domain.com', { type: 'sent', count: 100 }); + monitor.recordSendEvent('test-domain.com', { type: 'delivered', count: 95 }); + + // Get domain metrics + const metrics = monitor.getReputationData('test-domain.com'); + + // Verify metrics were recorded + if (metrics) { + expect(metrics.volume.sent).toEqual(100); + expect(metrics.volume.delivered).toEqual(95); + } +}); + +// Test IPWarmupManager functionality +tap.test('IPWarmupManager should handle IP allocation policies', async () => { + // Initialize warmup manager + const manager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2'], + targetDomains: ['test-domain.com'] + }); + + // Set allocation policy + manager.setActiveAllocationPolicy('balanced'); + + // Verify allocation methods work + const canSend = manager.canSendMoreToday('192.168.1.1'); + expect(typeof canSend).toEqual('boolean'); +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.emailauth.ts b/test/test.emailauth.ts new file mode 100644 index 0000000..03df1bf --- /dev/null +++ b/test/test.emailauth.ts @@ -0,0 +1,199 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import { SzPlatformService } from '../ts/platformservice.js'; +import { SpfVerifier, SpfQualifier, SpfMechanismType } from '../ts/mta/classes.spfverifier.js'; +import { DmarcVerifier, DmarcPolicy, DmarcAlignment } from '../ts/mta/classes.dmarcverifier.js'; +import { Email } from '../ts/mta/classes.email.js'; + +/** + * Test email authentication systems: SPF and DMARC + */ + +// Setup platform service for testing +let platformService: SzPlatformService; + +tap.test('Setup test environment', async () => { + platformService = new SzPlatformService(); + await platformService.init('test'); + expect(platformService.mtaService).toBeTruthy(); +}); + +// SPF Verifier Tests +tap.test('SPF Verifier - should parse SPF record', async () => { + const spfVerifier = new SpfVerifier(platformService.mtaService); + + // Test valid SPF record parsing + const record = 'v=spf1 a mx ip4:192.168.0.1/24 include:example.org ~all'; + const parsedRecord = spfVerifier.parseSpfRecord(record); + + expect(parsedRecord).toBeTruthy(); + expect(parsedRecord.version).toEqual('spf1'); + expect(parsedRecord.mechanisms.length).toEqual(5); + + // Check specific mechanisms + expect(parsedRecord.mechanisms[0].type).toEqual(SpfMechanismType.A); + expect(parsedRecord.mechanisms[0].qualifier).toEqual(SpfQualifier.PASS); + + expect(parsedRecord.mechanisms[1].type).toEqual(SpfMechanismType.MX); + expect(parsedRecord.mechanisms[1].qualifier).toEqual(SpfQualifier.PASS); + + expect(parsedRecord.mechanisms[2].type).toEqual(SpfMechanismType.IP4); + expect(parsedRecord.mechanisms[2].value).toEqual('192.168.0.1/24'); + + expect(parsedRecord.mechanisms[3].type).toEqual(SpfMechanismType.INCLUDE); + expect(parsedRecord.mechanisms[3].value).toEqual('example.org'); + + expect(parsedRecord.mechanisms[4].type).toEqual(SpfMechanismType.ALL); + expect(parsedRecord.mechanisms[4].qualifier).toEqual(SpfQualifier.SOFTFAIL); + + // Test invalid record + const invalidRecord = 'not-a-spf-record'; + const invalidParsed = spfVerifier.parseSpfRecord(invalidRecord); + expect(invalidParsed).toBeNull(); +}); + +// DMARC Verifier Tests +tap.test('DMARC Verifier - should parse DMARC record', async () => { + const dmarcVerifier = new DmarcVerifier(platformService.mtaService); + + // Test valid DMARC record parsing + const record = 'v=DMARC1; p=reject; sp=quarantine; pct=50; adkim=s; aspf=r; rua=mailto:dmarc@example.com'; + const parsedRecord = dmarcVerifier.parseDmarcRecord(record); + + expect(parsedRecord).toBeTruthy(); + expect(parsedRecord.version).toEqual('DMARC1'); + expect(parsedRecord.policy).toEqual(DmarcPolicy.REJECT); + expect(parsedRecord.subdomainPolicy).toEqual(DmarcPolicy.QUARANTINE); + expect(parsedRecord.pct).toEqual(50); + expect(parsedRecord.adkim).toEqual(DmarcAlignment.STRICT); + expect(parsedRecord.aspf).toEqual(DmarcAlignment.RELAXED); + expect(parsedRecord.reportUriAggregate).toContain('dmarc@example.com'); + + // Test invalid record + const invalidRecord = 'not-a-dmarc-record'; + const invalidParsed = dmarcVerifier.parseDmarcRecord(invalidRecord); + expect(invalidParsed).toBeNull(); +}); + +tap.test('DMARC Verifier - should verify DMARC alignment', async () => { + const dmarcVerifier = new DmarcVerifier(platformService.mtaService); + + // Test email domains with DMARC alignment + const email = new Email({ + from: 'sender@example.com', + to: 'recipient@example.net', + subject: 'Test DMARC alignment', + text: 'This is a test email' + }); + + // Test when both SPF and DKIM pass with alignment + const dmarcResult = await dmarcVerifier.verify( + email, + { domain: 'example.com', result: true }, // SPF - aligned and passed + { domain: 'example.com', result: true } // DKIM - aligned and passed + ); + + expect(dmarcResult).toBeTruthy(); + expect(dmarcResult.spfPassed).toEqual(true); + expect(dmarcResult.dkimPassed).toEqual(true); + expect(dmarcResult.spfDomainAligned).toEqual(true); + expect(dmarcResult.dkimDomainAligned).toEqual(true); + expect(dmarcResult.action).toEqual('pass'); + + // Test when neither SPF nor DKIM is aligned + const dmarcResult2 = await dmarcVerifier.verify( + email, + { domain: 'differentdomain.com', result: true }, // SPF - passed but not aligned + { domain: 'anotherdomain.com', result: true } // DKIM - passed but not aligned + ); + + expect(dmarcResult2).toBeTruthy(); + expect(dmarcResult2.spfPassed).toEqual(true); + expect(dmarcResult2.dkimPassed).toEqual(true); + expect(dmarcResult2.spfDomainAligned).toEqual(false); + expect(dmarcResult2.dkimDomainAligned).toEqual(false); + // Since there's no DMARC record in test environment, we expect "none" policy + expect(dmarcResult2.policyEvaluated).toEqual(DmarcPolicy.NONE); +}); + +tap.test('DMARC Verifier - should apply policy correctly', async () => { + const dmarcVerifier = new DmarcVerifier(platformService.mtaService); + + // Create test email + const email = new Email({ + from: 'sender@example.com', + to: 'recipient@example.net', + subject: 'Test DMARC policy application', + text: 'This is a test email' + }); + + // Test pass action + const passResult = { + hasDmarc: true, + spfDomainAligned: true, + dkimDomainAligned: true, + spfPassed: true, + dkimPassed: true, + policyEvaluated: DmarcPolicy.NONE, + actualPolicy: DmarcPolicy.NONE, + appliedPercentage: 100, + action: 'pass', + details: 'DMARC passed' + }; + + const passApplied = dmarcVerifier.applyPolicy(email, passResult); + expect(passApplied).toEqual(true); + expect(email.mightBeSpam).toEqual(false); + expect(email.headers['X-DMARC-Result']).toEqual('DMARC passed'); + + // Test quarantine action + const quarantineResult = { + hasDmarc: true, + spfDomainAligned: false, + dkimDomainAligned: false, + spfPassed: false, + dkimPassed: false, + policyEvaluated: DmarcPolicy.QUARANTINE, + actualPolicy: DmarcPolicy.QUARANTINE, + appliedPercentage: 100, + action: 'quarantine', + details: 'DMARC failed, policy=quarantine' + }; + + // Reset email spam flag + email.mightBeSpam = false; + email.headers = {}; + + const quarantineApplied = dmarcVerifier.applyPolicy(email, quarantineResult); + expect(quarantineApplied).toEqual(true); + expect(email.mightBeSpam).toEqual(true); + expect(email.headers['X-Spam-Flag']).toEqual('YES'); + expect(email.headers['X-DMARC-Result']).toEqual('DMARC failed, policy=quarantine'); + + // Test reject action + const rejectResult = { + hasDmarc: true, + spfDomainAligned: false, + dkimDomainAligned: false, + spfPassed: false, + dkimPassed: false, + policyEvaluated: DmarcPolicy.REJECT, + actualPolicy: DmarcPolicy.REJECT, + appliedPercentage: 100, + action: 'reject', + details: 'DMARC failed, policy=reject' + }; + + // Reset email spam flag + email.mightBeSpam = false; + email.headers = {}; + + const rejectApplied = dmarcVerifier.applyPolicy(email, rejectResult); + expect(rejectApplied).toEqual(false); + expect(email.mightBeSpam).toEqual(true); +}); + +tap.test('Cleanup test environment', async () => { + await platformService.stop(); +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.ipreputationchecker.ts b/test/test.ipreputationchecker.ts new file mode 100644 index 0000000..5afb197 --- /dev/null +++ b/test/test.ipreputationchecker.ts @@ -0,0 +1,175 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import { IPReputationChecker, ReputationThreshold, IPType } from '../ts/security/classes.ipreputationchecker.js'; +import * as plugins from '../ts/plugins.js'; + +// Mock for dns lookup +const originalDnsResolve = plugins.dns.promises.resolve; +let mockDnsResolveImpl: (hostname: string) => Promise = async () => ['127.0.0.1']; + +// Setup mock DNS resolver +plugins.dns.promises.resolve = async (hostname: string) => { + return mockDnsResolveImpl(hostname); +}; + +// Test instantiation +tap.test('IPReputationChecker - should be instantiable', async () => { + const checker = IPReputationChecker.getInstance({ + enableDNSBL: false, + enableIPInfo: false, + enableLocalCache: false + }); + + expect(checker).toBeTruthy(); +}); + +// Test singleton pattern +tap.test('IPReputationChecker - should use singleton pattern', async () => { + const checker1 = IPReputationChecker.getInstance(); + const checker2 = IPReputationChecker.getInstance(); + + // Both instances should be the same object + expect(checker1 === checker2).toEqual(true); +}); + +// Test IP validation +tap.test('IPReputationChecker - should validate IP address format', async () => { + const checker = IPReputationChecker.getInstance({ + enableDNSBL: false, + enableIPInfo: false, + enableLocalCache: false + }); + + // Valid IP should work + const result = await checker.checkReputation('192.168.1.1'); + expect(result.score).toBeGreaterThan(0); + expect(result.error).toBeUndefined(); + + // Invalid IP should fail with error + const invalidResult = await checker.checkReputation('invalid.ip'); + expect(invalidResult.error).toBeTruthy(); +}); + +// Test DNSBL lookups +tap.test('IPReputationChecker - should check IP against DNSBL', async () => { + try { + // Setup mock implementation for DNSBL + mockDnsResolveImpl = async (hostname: string) => { + // Listed in DNSBL if IP contains 2 + if (hostname.includes('2.1.168.192') && hostname.includes('zen.spamhaus.org')) { + return ['127.0.0.2']; + } + throw { code: 'ENOTFOUND' }; + }; + + // Create a new instance with specific settings for this test + const testInstance = new IPReputationChecker({ + dnsblServers: ['zen.spamhaus.org'], + enableIPInfo: false, + enableLocalCache: false, + maxCacheSize: 1 // Small cache for testing + }); + + // Clean IP should have good score + const cleanResult = await testInstance.checkReputation('192.168.1.1'); + expect(cleanResult.isSpam).toEqual(false); + expect(cleanResult.score).toEqual(100); + + // Blacklisted IP should have reduced score + const blacklistedResult = await testInstance.checkReputation('192.168.1.2'); + expect(blacklistedResult.isSpam).toEqual(true); + expect(blacklistedResult.score < 100).toEqual(true); // Less than 100 + expect(blacklistedResult.blacklists).toBeTruthy(); + expect((blacklistedResult.blacklists || []).length > 0).toEqual(true); + } catch (err) { + console.error('Test error:', err); + throw err; + } +}); + +// Test caching behavior +tap.test('IPReputationChecker - should cache reputation results', async () => { + // Create a fresh instance for this test + const testInstance = new IPReputationChecker({ + enableIPInfo: false, + enableLocalCache: false, + maxCacheSize: 10 // Small cache for testing + }); + + // Check that first look performs a lookup and second uses cache + const ip = '192.168.1.10'; + + // First check should add to cache + const result1 = await testInstance.checkReputation(ip); + expect(result1).toBeTruthy(); + + // Manually verify it's in cache - access private member for testing + const hasInCache = (testInstance as any).reputationCache.has(ip); + expect(hasInCache).toEqual(true); + + // Call again, should use cache + const result2 = await testInstance.checkReputation(ip); + expect(result2).toBeTruthy(); + + // Results should be identical + expect(result1.score).toEqual(result2.score); +}); + +// Test risk level classification +tap.test('IPReputationChecker - should classify risk levels correctly', async () => { + expect(IPReputationChecker.getRiskLevel(10)).toEqual('high'); + expect(IPReputationChecker.getRiskLevel(30)).toEqual('medium'); + expect(IPReputationChecker.getRiskLevel(60)).toEqual('low'); + expect(IPReputationChecker.getRiskLevel(90)).toEqual('trusted'); +}); + +// Test IP type detection +tap.test('IPReputationChecker - should detect special IP types', async () => { + const testInstance = new IPReputationChecker({ + enableDNSBL: false, + enableIPInfo: true, + enableLocalCache: false, + maxCacheSize: 5 // Small cache for testing + }); + + // Test Tor exit node detection + const torResult = await testInstance.checkReputation('171.25.1.1'); + expect(torResult.isTor).toEqual(true); + expect(torResult.score < 90).toEqual(true); + + // Test VPN detection + const vpnResult = await testInstance.checkReputation('185.156.1.1'); + expect(vpnResult.isVPN).toEqual(true); + expect(vpnResult.score < 90).toEqual(true); + + // Test proxy detection + const proxyResult = await testInstance.checkReputation('34.92.1.1'); + expect(proxyResult.isProxy).toEqual(true); + expect(proxyResult.score < 90).toEqual(true); +}); + +// Test error handling +tap.test('IPReputationChecker - should handle DNS lookup errors gracefully', async () => { + // Setup mock implementation to simulate error + mockDnsResolveImpl = async () => { + throw new Error('DNS server error'); + }; + + const checker = IPReputationChecker.getInstance({ + dnsblServers: ['zen.spamhaus.org'], + enableIPInfo: false, + enableLocalCache: false, + maxCacheSize: 300 // Force new instance + }); + + // Should return a result despite errors + const result = await checker.checkReputation('192.168.1.1'); + expect(result.score).toEqual(100); // No blacklist hits found due to error + expect(result.isSpam).toEqual(false); +}); + +// Restore original implementation at the end +tap.test('Cleanup - restore mocks', async () => { + plugins.dns.promises.resolve = originalDnsResolve; +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.ipwarmupmanager.ts b/test/test.ipwarmupmanager.ts new file mode 100644 index 0000000..08bf067 --- /dev/null +++ b/test/test.ipwarmupmanager.ts @@ -0,0 +1,300 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import * as plugins from '../ts/plugins.js'; +import * as paths from '../ts/paths.js'; +import { IPWarmupManager } from '../ts/deliverability/classes.ipwarmupmanager.js'; + +// Cleanup any temporary test data +const cleanupTestData = () => { + const warmupDataPath = plugins.path.join(paths.dataDir, 'warmup'); + if (plugins.fs.existsSync(warmupDataPath)) { + plugins.smartfile.memory.unlinkDir(warmupDataPath); + } +}; + +// Helper to reset the singleton instance between tests +const resetSingleton = () => { + // @ts-ignore - accessing private static field for testing + IPWarmupManager._instance = null; +}; + +// Before running any tests +tap.test('setup', async () => { + cleanupTestData(); +}); + +// Test initialization of IPWarmupManager +tap.test('should initialize IPWarmupManager with default settings', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance(); + + expect(ipWarmupManager).to.be.an('object'); + expect(ipWarmupManager.getBestIPForSending).to.be.a('function'); + expect(ipWarmupManager.canSendMoreToday).to.be.a('function'); + expect(ipWarmupManager.getStageCount).to.be.a('function'); + expect(ipWarmupManager.setActiveAllocationPolicy).to.be.a('function'); +}); + +// Test initialization with custom settings +tap.test('should initialize IPWarmupManager with custom settings', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2'], + targetDomains: ['example.com', 'test.com'], + fallbackPercentage: 75 + }); + + // Test setting allocation policy + ipWarmupManager.setActiveAllocationPolicy('roundRobin'); + + // Get best IP for sending + const bestIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + // Check if we can send more today + const canSendMore = ipWarmupManager.canSendMoreToday('192.168.1.1'); + + // Check stage count + const stageCount = ipWarmupManager.getStageCount(); + expect(stageCount).to.be.a('number'); +}); + +// Test IP allocation policies +tap.test('should allocate IPs using balanced policy', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2', '192.168.1.3'], + targetDomains: ['example.com', 'test.com'], + allocationPolicy: 'balanced' + }); + + ipWarmupManager.setActiveAllocationPolicy('balanced'); + + // Use getBestIPForSending multiple times and check if all IPs are used + const usedIPs = new Set(); + for (let i = 0; i < 30; i++) { + const ip = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + if (ip) usedIPs.add(ip); + } + + // We should use at least 2 different IPs with balanced policy + expect(usedIPs.size).to.be.at.least(2); +}); + +// Test round robin allocation policy +tap.test('should allocate IPs using round robin policy', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2', '192.168.1.3'], + targetDomains: ['example.com', 'test.com'], + allocationPolicy: 'roundRobin' + }); + + ipWarmupManager.setActiveAllocationPolicy('roundRobin'); + + // First few IPs should rotate through the available IPs + const firstIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + const secondIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + const thirdIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + // Round robin should give us different IPs for consecutive calls + expect(firstIP).to.not.equal(secondIP); + + // Fourth call should cycle back to first IP + const fourthIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + expect(fourthIP).to.equal(firstIP); +}); + +// Test dedicated domain allocation policy +tap.test('should allocate IPs using dedicated domain policy', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2', '192.168.1.3'], + targetDomains: ['example.com', 'test.com', 'other.com'], + allocationPolicy: 'dedicatedDomain' + }); + + ipWarmupManager.setActiveAllocationPolicy('dedicatedDomain'); + + // Map domains to IPs + ipWarmupManager.mapDomainToIP('example.com', '192.168.1.1'); + ipWarmupManager.mapDomainToIP('test.com', '192.168.1.2'); + ipWarmupManager.mapDomainToIP('other.com', '192.168.1.3'); + + // Each domain should get its dedicated IP + const exampleIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@gmail.com'], + domain: 'example.com' + }); + + const testIP = ipWarmupManager.getBestIPForSending({ + from: 'test@test.com', + to: ['recipient@gmail.com'], + domain: 'test.com' + }); + + const otherIP = ipWarmupManager.getBestIPForSending({ + from: 'test@other.com', + to: ['recipient@gmail.com'], + domain: 'other.com' + }); + + expect(exampleIP).to.equal('192.168.1.1'); + expect(testIP).to.equal('192.168.1.2'); + expect(otherIP).to.equal('192.168.1.3'); +}); + +// Test daily sending limits +tap.test('should enforce daily sending limits', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1'], + targetDomains: ['example.com'], + allocationPolicy: 'balanced' + }); + + // Override the warmup stage for testing + // @ts-ignore - accessing private method for testing + ipWarmupManager.warmupStatus.set('192.168.1.1', { + isActive: true, + currentStage: 0, + startDate: new Date(), + dailySendCount: 0, + hourlySendCount: {} + }); + + // Set a very low daily limit for testing + // @ts-ignore - accessing private method for testing + ipWarmupManager.warmupStages = [ + { dailyLimit: 5, duration: 5, hourlyPercentage: { min: 0, max: 40 } } + ]; + + // First 5 sends should succeed + for (let i = 0; i < 5; i++) { + const ip = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + expect(ip).to.equal('192.168.1.1'); + ipWarmupManager.recordSend(ip); + } + + // 6th send should not get an IP due to daily limit + const sixthIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + expect(sixthIP).to.be.null; +}); + +// Test recording sends +tap.test('should record send events correctly', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2'], + targetDomains: ['example.com'], + }); + + // Set allocation policy + ipWarmupManager.setActiveAllocationPolicy('balanced'); + + // Get an IP for sending + const ip = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + // If we got an IP, record some sends + if (ip) { + // Record a few sends + for (let i = 0; i < 5; i++) { + ipWarmupManager.recordSend(ip); + } + + // Check if we can still send more + const canSendMore = ipWarmupManager.canSendMoreToday(ip); + expect(canSendMore).to.be.a('boolean'); + } +}); + +// Test that DedicatedDomainPolicy assigns IPs correctly +tap.test('should assign IPs using dedicated domain policy', async () => { + resetSingleton(); + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2', '192.168.1.3'], + targetDomains: ['example.com', 'test.com', 'other.com'] + }); + + // Set allocation policy to dedicated domains + ipWarmupManager.setActiveAllocationPolicy('dedicated'); + + // Check allocation by querying for different domains + const ip1 = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + const ip2 = ipWarmupManager.getBestIPForSending({ + from: 'test@test.com', + to: ['recipient@test.com'], + domain: 'test.com' + }); + + // If we got IPs, they should be consistently assigned + if (ip1 && ip2) { + // Requesting the same domain again should return the same IP + const ip1again = ipWarmupManager.getBestIPForSending({ + from: 'another@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + expect(ip1again).to.equal(ip1); + } +}); + +// After all tests, clean up +tap.test('cleanup', async () => { + cleanupTestData(); +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.minimal.ts b/test/test.minimal.ts new file mode 100644 index 0000000..321f5d5 --- /dev/null +++ b/test/test.minimal.ts @@ -0,0 +1,62 @@ +import { tap } from '@push.rocks/tapbundle'; +import * as plugins from '../ts/plugins.js'; +import * as paths from '../ts/paths.js'; +import { SenderReputationMonitor } from '../ts/deliverability/classes.senderreputationmonitor.js'; +import { IPWarmupManager } from '../ts/deliverability/classes.ipwarmupmanager.js'; + +/** + * Basic test to check if our integrated classes work correctly + */ +tap.test('verify that SenderReputationMonitor and IPWarmupManager are functioning', async (tools) => { + // Create instances of both classes + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + const ipWarmupManager = IPWarmupManager.getInstance({ + enabled: true, + ipAddresses: ['192.168.1.1', '192.168.1.2'], + targetDomains: ['example.com'] + }); + + // Test SenderReputationMonitor + reputationMonitor.recordSendEvent('example.com', { type: 'sent', count: 100 }); + reputationMonitor.recordSendEvent('example.com', { type: 'delivered', count: 95 }); + + const reputationData = reputationMonitor.getReputationData('example.com'); + const summary = reputationMonitor.getReputationSummary(); + + // Basic checks + tools.ok(reputationData, 'Got reputation data'); + tools.ok(summary.length > 0, 'Got reputation summary'); + + // Add and remove domains + reputationMonitor.addDomain('test.com'); + reputationMonitor.removeDomain('test.com'); + + // Test IPWarmupManager + ipWarmupManager.setActiveAllocationPolicy('balanced'); + + const bestIP = ipWarmupManager.getBestIPForSending({ + from: 'test@example.com', + to: ['recipient@test.com'], + domain: 'example.com' + }); + + if (bestIP) { + ipWarmupManager.recordSend(bestIP); + const canSendMore = ipWarmupManager.canSendMoreToday(bestIP); + tools.ok(canSendMore !== undefined, 'Can check if sending more is allowed'); + } + + const stageCount = ipWarmupManager.getStageCount(); + tools.ok(stageCount > 0, 'Got stage count'); +}); + +// Final clean-up test +tap.test('clean up after tests', async () => { + // No-op - just to make sure everything is cleaned up properly +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.ratelimiter.ts b/test/test.ratelimiter.ts new file mode 100644 index 0000000..d231619 --- /dev/null +++ b/test/test.ratelimiter.ts @@ -0,0 +1,137 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import { RateLimiter } from '../ts/mta/classes.ratelimiter.js'; + +tap.test('RateLimiter - should be instantiable', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 10, + periodMs: 1000, + perKey: true + }); + + expect(limiter).toBeTruthy(); +}); + +tap.test('RateLimiter - should allow requests within rate limit', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 5, + periodMs: 1000, + perKey: true + }); + + // Should allow 5 requests + for (let i = 0; i < 5; i++) { + expect(limiter.isAllowed('test')).toEqual(true); + } + + // 6th request should be denied + expect(limiter.isAllowed('test')).toEqual(false); +}); + +tap.test('RateLimiter - should enforce per-key limits', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 3, + periodMs: 1000, + perKey: true + }); + + // Should allow 3 requests for key1 + for (let i = 0; i < 3; i++) { + expect(limiter.isAllowed('key1')).toEqual(true); + } + + // 4th request for key1 should be denied + expect(limiter.isAllowed('key1')).toEqual(false); + + // But key2 should still be allowed + expect(limiter.isAllowed('key2')).toEqual(true); +}); + +tap.test('RateLimiter - should refill tokens over time', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 2, + periodMs: 100, // Short period for testing + perKey: true + }); + + // Use all tokens + expect(limiter.isAllowed('test')).toEqual(true); + expect(limiter.isAllowed('test')).toEqual(true); + expect(limiter.isAllowed('test')).toEqual(false); + + // Wait for refill + await new Promise(resolve => setTimeout(resolve, 150)); + + // Should have tokens again + expect(limiter.isAllowed('test')).toEqual(true); +}); + +tap.test('RateLimiter - should support burst allowance', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 2, + periodMs: 100, + perKey: true, + burstTokens: 2, // Allow 2 extra tokens for bursts + initialTokens: 4 // Start with max + burst tokens + }); + + // Should allow 4 requests (2 regular + 2 burst) + for (let i = 0; i < 4; i++) { + expect(limiter.isAllowed('test')).toEqual(true); + } + + // 5th request should be denied + expect(limiter.isAllowed('test')).toEqual(false); + + // Wait for refill + await new Promise(resolve => setTimeout(resolve, 150)); + + // Should have 2 tokens again (rate-limited to normal max, not burst) + expect(limiter.isAllowed('test')).toEqual(true); + expect(limiter.isAllowed('test')).toEqual(true); + + // 3rd request after refill should fail (only normal max is refilled, not burst) + expect(limiter.isAllowed('test')).toEqual(false); +}); + +tap.test('RateLimiter - should return correct stats', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 10, + periodMs: 1000, + perKey: true + }); + + // Make some requests + limiter.isAllowed('test'); + limiter.isAllowed('test'); + limiter.isAllowed('test'); + + // Get stats + const stats = limiter.getStats('test'); + + expect(stats.remaining).toEqual(7); + expect(stats.limit).toEqual(10); + expect(stats.allowed).toEqual(3); + expect(stats.denied).toEqual(0); +}); + +tap.test('RateLimiter - should reset limits', async () => { + const limiter = new RateLimiter({ + maxPerPeriod: 3, + periodMs: 1000, + perKey: true + }); + + // Use all tokens + expect(limiter.isAllowed('test')).toEqual(true); + expect(limiter.isAllowed('test')).toEqual(true); + expect(limiter.isAllowed('test')).toEqual(true); + expect(limiter.isAllowed('test')).toEqual(false); + + // Reset + limiter.reset('test'); + + // Should have tokens again + expect(limiter.isAllowed('test')).toEqual(true); +}); + +export default tap.start(); \ No newline at end of file diff --git a/test/test.reputationmonitor.ts b/test/test.reputationmonitor.ts new file mode 100644 index 0000000..b03570e --- /dev/null +++ b/test/test.reputationmonitor.ts @@ -0,0 +1,238 @@ +import { tap, expect } from '@push.rocks/tapbundle'; +import * as plugins from '../ts/plugins.js'; +import * as paths from '../ts/paths.js'; +import { SenderReputationMonitor } from '../ts/deliverability/classes.senderreputationmonitor.js'; + +// Cleanup any temporary test data +const cleanupTestData = () => { + const reputationDataPath = plugins.path.join(paths.dataDir, 'reputation'); + if (plugins.fs.existsSync(reputationDataPath)) { + plugins.smartfile.memory.unlinkDir(reputationDataPath); + } +}; + +// Helper to reset the singleton instance between tests +const resetSingleton = () => { + // @ts-ignore - accessing private static field for testing + SenderReputationMonitor._instance = null; +}; + +// Before running any tests +tap.test('setup', async () => { + cleanupTestData(); +}); + +// Test initialization of SenderReputationMonitor +tap.test('should initialize SenderReputationMonitor with default settings', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance(); + + expect(reputationMonitor).to.be.an('object'); + // Check if the object has the expected methods + expect(reputationMonitor.recordSendEvent).to.be.a('function'); + expect(reputationMonitor.getReputationData).to.be.a('function'); + expect(reputationMonitor.getReputationSummary).to.be.a('function'); +}); + +// Test initialization with custom settings +tap.test('should initialize SenderReputationMonitor with custom settings', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com', 'test.com'], + updateFrequency: 12 * 60 * 60 * 1000, // 12 hours + alertThresholds: { + minReputationScore: 80, + maxComplaintRate: 0.05 + } + }); + + // Test adding domains + reputationMonitor.addDomain('newdomain.com'); + + // Test retrieving reputation data + const data = reputationMonitor.getReputationData('example.com'); + expect(data).to.be.an('object'); + expect(data.domain).to.equal('example.com'); +}); + +// Test recording and tracking send events +tap.test('should record send events and update metrics', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + // Record a series of events + reputationMonitor.recordSendEvent('example.com', { type: 'sent', count: 100 }); + reputationMonitor.recordSendEvent('example.com', { type: 'delivered', count: 95 }); + reputationMonitor.recordSendEvent('example.com', { type: 'bounce', hardBounce: true, count: 3 }); + reputationMonitor.recordSendEvent('example.com', { type: 'bounce', hardBounce: false, count: 2 }); + reputationMonitor.recordSendEvent('example.com', { type: 'complaint', count: 1 }); + + // Check metrics + const metrics = reputationMonitor.getReputationData('example.com'); + + expect(metrics).to.be.an('object'); + expect(metrics.volume.sent).to.equal(100); + expect(metrics.volume.delivered).to.equal(95); + expect(metrics.volume.hardBounces).to.equal(3); + expect(metrics.volume.softBounces).to.equal(2); + expect(metrics.complaints.total).to.equal(1); +}); + +// Test reputation score calculation +tap.test('should calculate reputation scores correctly', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['high.com', 'medium.com', 'low.com'] + }); + + // Record events for different domains + reputationMonitor.recordSendEvent('high.com', { type: 'sent', count: 1000 }); + reputationMonitor.recordSendEvent('high.com', { type: 'delivered', count: 990 }); + reputationMonitor.recordSendEvent('high.com', { type: 'open', count: 500 }); + + reputationMonitor.recordSendEvent('medium.com', { type: 'sent', count: 1000 }); + reputationMonitor.recordSendEvent('medium.com', { type: 'delivered', count: 950 }); + reputationMonitor.recordSendEvent('medium.com', { type: 'open', count: 300 }); + + reputationMonitor.recordSendEvent('low.com', { type: 'sent', count: 1000 }); + reputationMonitor.recordSendEvent('low.com', { type: 'delivered', count: 850 }); + reputationMonitor.recordSendEvent('low.com', { type: 'open', count: 100 }); + + // Get reputation summary + const summary = reputationMonitor.getReputationSummary(); + expect(summary).to.be.an('array'); + expect(summary.length).to.be.at.least(3); + + // Check that domains are included in the summary + const domains = summary.map(item => item.domain); + expect(domains).to.include('high.com'); + expect(domains).to.include('medium.com'); + expect(domains).to.include('low.com'); +}); + +// Test adding and removing domains +tap.test('should add and remove domains for monitoring', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + // Add a new domain + reputationMonitor.addDomain('newdomain.com'); + + // Record data for the new domain + reputationMonitor.recordSendEvent('newdomain.com', { type: 'sent', count: 50 }); + + // Check that data was recorded for the new domain + const metrics = reputationMonitor.getReputationData('newdomain.com'); + expect(metrics).to.be.an('object'); + expect(metrics.volume.sent).to.equal(50); + + // Remove a domain + reputationMonitor.removeDomain('newdomain.com'); + + // Check that data is no longer available + const removedMetrics = reputationMonitor.getReputationData('newdomain.com'); + expect(removedMetrics).to.be.null; +}); + +// Test handling open and click events +tap.test('should track engagement metrics correctly', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + // Record basic sending metrics + reputationMonitor.recordSendEvent('example.com', { type: 'sent', count: 1000 }); + reputationMonitor.recordSendEvent('example.com', { type: 'delivered', count: 950 }); + + // Record engagement events + reputationMonitor.recordSendEvent('example.com', { type: 'open', count: 500 }); + reputationMonitor.recordSendEvent('example.com', { type: 'click', count: 250 }); + + // Check engagement metrics + const metrics = reputationMonitor.getReputationData('example.com'); + expect(metrics).to.be.an('object'); + expect(metrics.engagement.opens).to.equal(500); + expect(metrics.engagement.clicks).to.equal(250); + expect(metrics.engagement.openRate).to.be.a('number'); + expect(metrics.engagement.clickRate).to.be.a('number'); +}); + +// Test historical data tracking +tap.test('should store historical reputation data', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + // Record events over multiple days + const today = new Date(); + + // Record data + reputationMonitor.recordSendEvent('example.com', { type: 'sent', count: 1000 }); + reputationMonitor.recordSendEvent('example.com', { type: 'delivered', count: 950 }); + + // Get metrics data + const metrics = reputationMonitor.getReputationData('example.com'); + + // Check that historical data exists + expect(metrics.historical).to.be.an('object'); + expect(metrics.historical.reputationScores).to.be.an('object'); + + // Check that daily send volume is tracked + expect(metrics.volume.dailySendVolume).to.be.an('object'); + const todayStr = today.toISOString().split('T')[0]; + expect(metrics.volume.dailySendVolume[todayStr]).to.equal(1000); +}); + +// Test event recording for different event types +tap.test('should correctly handle different event types', async () => { + resetSingleton(); + const reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: true, + domains: ['example.com'] + }); + + // Record different types of events + reputationMonitor.recordSendEvent('example.com', { type: 'sent', count: 100 }); + reputationMonitor.recordSendEvent('example.com', { type: 'delivered', count: 95 }); + reputationMonitor.recordSendEvent('example.com', { type: 'bounce', hardBounce: true, count: 3 }); + reputationMonitor.recordSendEvent('example.com', { type: 'bounce', hardBounce: false, count: 2 }); + reputationMonitor.recordSendEvent('example.com', { type: 'complaint', receivingDomain: 'gmail.com', count: 1 }); + reputationMonitor.recordSendEvent('example.com', { type: 'open', count: 50 }); + reputationMonitor.recordSendEvent('example.com', { type: 'click', count: 25 }); + + // Check metrics for different event types + const metrics = reputationMonitor.getReputationData('example.com'); + + // Check volume metrics + expect(metrics.volume.sent).to.equal(100); + expect(metrics.volume.delivered).to.equal(95); + expect(metrics.volume.hardBounces).to.equal(3); + expect(metrics.volume.softBounces).to.equal(2); + + // Check complaint metrics + expect(metrics.complaints.total).to.equal(1); + expect(metrics.complaints.topDomains[0].domain).to.equal('gmail.com'); + + // Check engagement metrics + expect(metrics.engagement.opens).to.equal(50); + expect(metrics.engagement.clicks).to.equal(25); +}); + +// After all tests, clean up +tap.test('cleanup', async () => { + cleanupTestData(); +}); + +export default tap.start(); \ No newline at end of file diff --git a/ts/deliverability/classes.ipwarmupmanager.ts b/ts/deliverability/classes.ipwarmupmanager.ts new file mode 100644 index 0000000..8c9561f --- /dev/null +++ b/ts/deliverability/classes.ipwarmupmanager.ts @@ -0,0 +1,896 @@ +import * as plugins from '../plugins.js'; +import * as paths from '../paths.js'; +import { logger } from '../logger.js'; +import { LRUCache } from 'lru-cache'; + +/** + * Represents a single stage in the warmup process + */ +export interface IWarmupStage { + /** Stage number (1-based) */ + stage: number; + /** Maximum daily email volume for this stage */ + maxDailyVolume: number; + /** Duration of this stage in days */ + durationDays: number; + /** Target engagement metrics for this stage */ + targetMetrics?: { + /** Minimum open rate (percentage) */ + minOpenRate?: number; + /** Maximum bounce rate (percentage) */ + maxBounceRate?: number; + /** Maximum spam complaint rate (percentage) */ + maxComplaintRate?: number; + }; +} + +/** + * Configuration for IP warmup process + */ +export interface IIPWarmupConfig { + /** Whether the warmup is enabled */ + enabled?: boolean; + /** List of IP addresses to warm up */ + ipAddresses?: string[]; + /** Target domains to warm up (e.g. your sending domains) */ + targetDomains?: string[]; + /** Warmup stages defining volume and duration */ + stages?: IWarmupStage[]; + /** Date when warmup process started */ + startDate?: Date; + /** Default hourly distribution for sending (percentage of daily volume per hour) */ + hourlyDistribution?: number[]; + /** Whether to automatically advance stages based on metrics */ + autoAdvanceStages?: boolean; + /** Whether to suspend warmup if metrics decline */ + suspendOnMetricDecline?: boolean; + /** Percentage of traffic to send through fallback provider during warmup */ + fallbackPercentage?: number; + /** Whether to prioritize engaged subscribers during warmup */ + prioritizeEngagedSubscribers?: boolean; +} + +/** + * Status for a specific IP's warmup process + */ +export interface IIPWarmupStatus { + /** IP address being warmed up */ + ipAddress: string; + /** Current warmup stage */ + currentStage: number; + /** Start date of the warmup process */ + startDate: Date; + /** Start date of the current stage */ + currentStageStartDate: Date; + /** Target completion date for entire warmup */ + targetCompletionDate: Date; + /** Daily volume allocation for current stage */ + currentDailyAllocation: number; + /** Emails sent in current stage */ + sentInCurrentStage: number; + /** Total emails sent during warmup process */ + totalSent: number; + /** Whether the warmup is currently active */ + isActive: boolean; + /** Daily statistics for the past week */ + dailyStats: Array<{ + /** Date of the statistics */ + date: string; + /** Number of emails sent */ + sent: number; + /** Number of emails opened */ + opened: number; + /** Number of bounces */ + bounces: number; + /** Number of spam complaints */ + complaints: number; + }>; + /** Current metrics */ + metrics: { + /** Open rate percentage */ + openRate: number; + /** Bounce rate percentage */ + bounceRate: number; + /** Complaint rate percentage */ + complaintRate: number; + }; +} + +/** + * Defines methods for a policy used to allocate emails to different IPs + */ +export interface IIPAllocationPolicy { + /** Name of the policy */ + name: string; + + /** + * Allocate an IP address for sending an email + * @param availableIPs List of available IP addresses + * @param emailInfo Information about the email being sent + * @returns The IP to use, or null if no IP is available + */ + allocateIP( + availableIPs: Array<{ ip: string; priority: number; capacity: number }>, + emailInfo: { + from: string; + to: string[]; + domain: string; + isTransactional: boolean; + isWarmup: boolean; + } + ): string | null; +} + +/** + * Default IP warmup configuration with industry standard stages + */ +const DEFAULT_WARMUP_CONFIG: Required = { + enabled: true, + ipAddresses: [], + targetDomains: [], + stages: [ + { stage: 1, maxDailyVolume: 50, durationDays: 2, targetMetrics: { maxBounceRate: 8, minOpenRate: 15 } }, + { stage: 2, maxDailyVolume: 100, durationDays: 2, targetMetrics: { maxBounceRate: 7, minOpenRate: 18 } }, + { stage: 3, maxDailyVolume: 500, durationDays: 3, targetMetrics: { maxBounceRate: 6, minOpenRate: 20 } }, + { stage: 4, maxDailyVolume: 1000, durationDays: 3, targetMetrics: { maxBounceRate: 5, minOpenRate: 20 } }, + { stage: 5, maxDailyVolume: 5000, durationDays: 5, targetMetrics: { maxBounceRate: 3, minOpenRate: 22 } }, + { stage: 6, maxDailyVolume: 10000, durationDays: 5, targetMetrics: { maxBounceRate: 2, minOpenRate: 25 } }, + { stage: 7, maxDailyVolume: 20000, durationDays: 5, targetMetrics: { maxBounceRate: 1, minOpenRate: 25 } }, + { stage: 8, maxDailyVolume: 50000, durationDays: 5, targetMetrics: { maxBounceRate: 1, minOpenRate: 25 } }, + ], + startDate: new Date(), + // Default hourly distribution (percentage per hour, sums to 100%) + hourlyDistribution: [ + 1, 1, 1, 1, 1, 2, 3, 5, 7, 8, 10, 11, + 10, 9, 8, 6, 5, 4, 3, 2, 1, 1, 1, 0 + ], + autoAdvanceStages: true, + suspendOnMetricDecline: true, + fallbackPercentage: 50, + prioritizeEngagedSubscribers: true +}; + +/** + * Manages the IP warming process for new sending IPs + */ +export class IPWarmupManager { + private static instance: IPWarmupManager; + private config: Required; + private warmupStatuses: Map = new Map(); + private dailySendCounts: Map = new Map(); + private hourlySendCounts: Map = new Map(); + private isInitialized: boolean = false; + private allocationPolicies: Map = new Map(); + private activePolicy: string = 'balanced'; + + /** + * Constructor for IPWarmupManager + * @param config Warmup configuration + */ + constructor(config: IIPWarmupConfig = {}) { + this.config = { + ...DEFAULT_WARMUP_CONFIG, + ...config, + stages: config.stages || [...DEFAULT_WARMUP_CONFIG.stages] + }; + + // Register default allocation policies + this.registerAllocationPolicy('balanced', new BalancedAllocationPolicy()); + this.registerAllocationPolicy('roundRobin', new RoundRobinAllocationPolicy()); + this.registerAllocationPolicy('dedicated', new DedicatedDomainPolicy()); + + this.initialize(); + } + + /** + * Get the singleton instance of IPWarmupManager + * @param config Warmup configuration + * @returns Singleton instance + */ + public static getInstance(config: IIPWarmupConfig = {}): IPWarmupManager { + if (!IPWarmupManager.instance) { + IPWarmupManager.instance = new IPWarmupManager(config); + } + return IPWarmupManager.instance; + } + + /** + * Initialize the warmup manager + */ + private initialize(): void { + if (this.isInitialized) return; + + try { + // Load warmup statuses from storage + this.loadWarmupStatuses(); + + // Initialize any new IPs that might have been added to config + for (const ip of this.config.ipAddresses) { + if (!this.warmupStatuses.has(ip)) { + this.initializeIPWarmup(ip); + } + } + + // Initialize daily and hourly counters + const today = new Date().toISOString().split('T')[0]; + for (const ip of this.config.ipAddresses) { + this.dailySendCounts.set(ip, 0); + this.hourlySendCounts.set(ip, Array(24).fill(0)); + } + + // Schedule daily reset of counters + this.scheduleDailyReset(); + + // Schedule daily evaluation of warmup progress + this.scheduleDailyEvaluation(); + + this.isInitialized = true; + logger.log('info', `IP Warmup Manager initialized with ${this.config.ipAddresses.length} IPs`); + } catch (error) { + logger.log('error', `Failed to initialize IP Warmup Manager: ${error.message}`, { + stack: error.stack + }); + } + } + + /** + * Initialize warmup status for a new IP address + * @param ipAddress IP address to initialize + */ + private initializeIPWarmup(ipAddress: string): void { + const startDate = new Date(); + let targetCompletionDate = new Date(startDate); + + // Calculate target completion date based on stages + let totalDays = 0; + for (const stage of this.config.stages) { + totalDays += stage.durationDays; + } + + targetCompletionDate.setDate(targetCompletionDate.getDate() + totalDays); + + const warmupStatus: IIPWarmupStatus = { + ipAddress, + currentStage: 1, + startDate, + currentStageStartDate: new Date(), + targetCompletionDate, + currentDailyAllocation: this.config.stages[0].maxDailyVolume, + sentInCurrentStage: 0, + totalSent: 0, + isActive: true, + dailyStats: [], + metrics: { + openRate: 0, + bounceRate: 0, + complaintRate: 0 + } + }; + + this.warmupStatuses.set(ipAddress, warmupStatus); + this.saveWarmupStatuses(); + + logger.log('info', `Initialized warmup for IP ${ipAddress}`, { + currentStage: 1, + targetCompletion: targetCompletionDate.toISOString().split('T')[0] + }); + } + + /** + * Schedule daily reset of send counters + */ + private scheduleDailyReset(): void { + // Calculate time until midnight + const now = new Date(); + const tomorrow = new Date(now); + tomorrow.setDate(tomorrow.getDate() + 1); + tomorrow.setHours(0, 0, 0, 0); + + const timeUntilMidnight = tomorrow.getTime() - now.getTime(); + + // Schedule reset + setTimeout(() => { + this.resetDailyCounts(); + // Reschedule for next day + this.scheduleDailyReset(); + }, timeUntilMidnight); + + logger.log('info', `Scheduled daily counter reset in ${Math.floor(timeUntilMidnight / 60000)} minutes`); + } + + /** + * Reset daily send counters + */ + private resetDailyCounts(): void { + for (const ip of this.config.ipAddresses) { + // Save yesterday's count to history before resetting + const status = this.warmupStatuses.get(ip); + if (status) { + const yesterday = new Date(); + yesterday.setDate(yesterday.getDate() - 1); + + // Update daily stats with yesterday's data + const sentCount = this.dailySendCounts.get(ip) || 0; + status.dailyStats.push({ + date: yesterday.toISOString().split('T')[0], + sent: sentCount, + opened: Math.floor(sentCount * status.metrics.openRate / 100), + bounces: Math.floor(sentCount * status.metrics.bounceRate / 100), + complaints: Math.floor(sentCount * status.metrics.complaintRate / 100) + }); + + // Keep only the last 7 days of stats + if (status.dailyStats.length > 7) { + status.dailyStats.shift(); + } + } + + // Reset counters for today + this.dailySendCounts.set(ip, 0); + this.hourlySendCounts.set(ip, Array(24).fill(0)); + } + + // Save updated statuses + this.saveWarmupStatuses(); + + logger.log('info', 'Daily send counters reset'); + } + + /** + * Schedule daily evaluation of warmup progress + */ + private scheduleDailyEvaluation(): void { + // Calculate time until 1 AM (do evaluation after midnight) + const now = new Date(); + const evaluationTime = new Date(now); + evaluationTime.setDate(evaluationTime.getDate() + 1); + evaluationTime.setHours(1, 0, 0, 0); + + const timeUntilEvaluation = evaluationTime.getTime() - now.getTime(); + + // Schedule evaluation + setTimeout(() => { + this.evaluateWarmupProgress(); + // Reschedule for next day + this.scheduleDailyEvaluation(); + }, timeUntilEvaluation); + + logger.log('info', `Scheduled daily warmup evaluation in ${Math.floor(timeUntilEvaluation / 60000)} minutes`); + } + + /** + * Evaluate warmup progress and possibly advance stages + */ + private evaluateWarmupProgress(): void { + if (!this.config.autoAdvanceStages) { + logger.log('info', 'Auto-advance stages is disabled, skipping evaluation'); + return; + } + + // Convert entries to array for compatibility with older JS versions + Array.from(this.warmupStatuses.entries()).forEach(([ip, status]) => { + if (!status.isActive) return; + + // Check if current stage duration has elapsed + const currentStage = this.config.stages[status.currentStage - 1]; + const now = new Date(); + const daysSinceStageStart = Math.floor( + (now.getTime() - status.currentStageStartDate.getTime()) / (24 * 60 * 60 * 1000) + ); + + if (daysSinceStageStart >= currentStage.durationDays) { + // Check if metrics meet requirements for advancing + const metricsOK = this.checkStageMetrics(status, currentStage); + + if (metricsOK) { + // Advance to next stage if not at the final stage + if (status.currentStage < this.config.stages.length) { + this.advanceToNextStage(ip); + } else { + logger.log('info', `IP ${ip} has completed the warmup process`); + } + } else if (this.config.suspendOnMetricDecline) { + // Suspend warmup if metrics don't meet requirements + status.isActive = false; + logger.log('warn', `Suspended warmup for IP ${ip} due to poor metrics`, { + openRate: status.metrics.openRate, + bounceRate: status.metrics.bounceRate, + complaintRate: status.metrics.complaintRate + }); + } else { + // Extend current stage if metrics don't meet requirements + logger.log('info', `Extending stage ${status.currentStage} for IP ${ip} due to metrics not meeting requirements`); + } + } + }); + + // Save updated statuses + this.saveWarmupStatuses(); + } + + /** + * Check if the current metrics meet the requirements for the stage + * @param status Warmup status to check + * @param stage Stage to check against + * @returns Whether metrics meet requirements + */ + private checkStageMetrics(status: IIPWarmupStatus, stage: IWarmupStage): boolean { + // If no target metrics specified, assume met + if (!stage.targetMetrics) return true; + + const metrics = status.metrics; + let meetsRequirements = true; + + // Check each metric against requirements + if (stage.targetMetrics.minOpenRate !== undefined && + metrics.openRate < stage.targetMetrics.minOpenRate) { + meetsRequirements = false; + logger.log('info', `Open rate ${metrics.openRate}% below target ${stage.targetMetrics.minOpenRate}% for IP ${status.ipAddress}`); + } + + if (stage.targetMetrics.maxBounceRate !== undefined && + metrics.bounceRate > stage.targetMetrics.maxBounceRate) { + meetsRequirements = false; + logger.log('info', `Bounce rate ${metrics.bounceRate}% above target ${stage.targetMetrics.maxBounceRate}% for IP ${status.ipAddress}`); + } + + if (stage.targetMetrics.maxComplaintRate !== undefined && + metrics.complaintRate > stage.targetMetrics.maxComplaintRate) { + meetsRequirements = false; + logger.log('info', `Complaint rate ${metrics.complaintRate}% above target ${stage.targetMetrics.maxComplaintRate}% for IP ${status.ipAddress}`); + } + + return meetsRequirements; + } + + /** + * Advance IP to the next warmup stage + * @param ipAddress IP address to advance + */ + private advanceToNextStage(ipAddress: string): void { + const status = this.warmupStatuses.get(ipAddress); + if (!status) return; + + // Store metrics for the completed stage + const completedStage = status.currentStage; + + // Advance to next stage + status.currentStage++; + status.currentStageStartDate = new Date(); + status.sentInCurrentStage = 0; + + // Update allocation + const newStage = this.config.stages[status.currentStage - 1]; + status.currentDailyAllocation = newStage.maxDailyVolume; + + logger.log('info', `Advanced IP ${ipAddress} to warmup stage ${status.currentStage}`, { + previousStage: completedStage, + newDailyLimit: status.currentDailyAllocation, + durationDays: newStage.durationDays + }); + } + + /** + * Get warmup status for all IPs or a specific IP + * @param ipAddress Optional specific IP to get status for + * @returns Warmup status information + */ + public getWarmupStatus(ipAddress?: string): IIPWarmupStatus | Map { + if (ipAddress) { + return this.warmupStatuses.get(ipAddress); + } + return this.warmupStatuses; + } + + /** + * Add a new IP address to the warmup process + * @param ipAddress IP address to add + */ + public addIPToWarmup(ipAddress: string): void { + if (this.config.ipAddresses.includes(ipAddress)) { + logger.log('info', `IP ${ipAddress} is already in warmup`); + return; + } + + // Add to configuration + this.config.ipAddresses.push(ipAddress); + + // Initialize warmup + this.initializeIPWarmup(ipAddress); + + // Initialize counters + this.dailySendCounts.set(ipAddress, 0); + this.hourlySendCounts.set(ipAddress, Array(24).fill(0)); + + logger.log('info', `Added IP ${ipAddress} to warmup process`); + } + + /** + * Remove an IP address from the warmup process + * @param ipAddress IP address to remove + */ + public removeIPFromWarmup(ipAddress: string): void { + const index = this.config.ipAddresses.indexOf(ipAddress); + if (index === -1) { + logger.log('info', `IP ${ipAddress} is not in warmup`); + return; + } + + // Remove from configuration + this.config.ipAddresses.splice(index, 1); + + // Remove from statuses and counters + this.warmupStatuses.delete(ipAddress); + this.dailySendCounts.delete(ipAddress); + this.hourlySendCounts.delete(ipAddress); + + this.saveWarmupStatuses(); + + logger.log('info', `Removed IP ${ipAddress} from warmup process`); + } + + /** + * Update metrics for an IP address + * @param ipAddress IP address to update + * @param metrics New metrics + */ + public updateMetrics( + ipAddress: string, + metrics: { openRate?: number; bounceRate?: number; complaintRate?: number } + ): void { + const status = this.warmupStatuses.get(ipAddress); + if (!status) { + logger.log('warn', `Cannot update metrics for IP ${ipAddress} - not in warmup`); + return; + } + + // Update metrics + if (metrics.openRate !== undefined) { + status.metrics.openRate = metrics.openRate; + } + + if (metrics.bounceRate !== undefined) { + status.metrics.bounceRate = metrics.bounceRate; + } + + if (metrics.complaintRate !== undefined) { + status.metrics.complaintRate = metrics.complaintRate; + } + + this.saveWarmupStatuses(); + + logger.log('info', `Updated metrics for IP ${ipAddress}`, { + openRate: status.metrics.openRate, + bounceRate: status.metrics.bounceRate, + complaintRate: status.metrics.complaintRate + }); + } + + /** + * Record a send event for an IP address + * @param ipAddress IP address used for sending + */ + public recordSend(ipAddress: string): void { + if (!this.config.ipAddresses.includes(ipAddress)) { + logger.log('warn', `Cannot record send for IP ${ipAddress} - not in warmup`); + return; + } + + // Increment daily counter + const currentCount = this.dailySendCounts.get(ipAddress) || 0; + this.dailySendCounts.set(ipAddress, currentCount + 1); + + // Increment hourly counter + const hourlyCount = this.hourlySendCounts.get(ipAddress) || Array(24).fill(0); + const currentHour = new Date().getHours(); + hourlyCount[currentHour]++; + this.hourlySendCounts.set(ipAddress, hourlyCount); + + // Update warmup status + const status = this.warmupStatuses.get(ipAddress); + if (status) { + status.sentInCurrentStage++; + status.totalSent++; + } + } + + /** + * Check if an IP can send more emails today + * @param ipAddress IP address to check + * @returns Whether the IP can send more emails + */ + public canSendMoreToday(ipAddress: string): boolean { + if (!this.config.enabled) return true; + + if (!this.config.ipAddresses.includes(ipAddress)) { + // If not in warmup, assume it can send + return true; + } + + const status = this.warmupStatuses.get(ipAddress); + if (!status || !status.isActive) { + return false; + } + + const currentCount = this.dailySendCounts.get(ipAddress) || 0; + return currentCount < status.currentDailyAllocation; + } + + /** + * Check if an IP can send more emails in the current hour + * @param ipAddress IP address to check + * @returns Whether the IP can send more emails this hour + */ + public canSendMoreThisHour(ipAddress: string): boolean { + if (!this.config.enabled) return true; + + if (!this.config.ipAddresses.includes(ipAddress)) { + // If not in warmup, assume it can send + return true; + } + + const status = this.warmupStatuses.get(ipAddress); + if (!status || !status.isActive) { + return false; + } + + const currentDailyLimit = status.currentDailyAllocation; + const currentHour = new Date().getHours(); + const hourlyAllocation = Math.ceil((currentDailyLimit * this.config.hourlyDistribution[currentHour]) / 100); + + const hourlyCount = this.hourlySendCounts.get(ipAddress) || Array(24).fill(0); + const currentHourCount = hourlyCount[currentHour]; + + return currentHourCount < hourlyAllocation; + } + + /** + * Get the best IP to use for sending an email + * @param emailInfo Information about the email being sent + * @returns The best IP to use, or null if no suitable IP is available + */ + public getBestIPForSending(emailInfo: { + from: string; + to: string[]; + domain: string; + isTransactional?: boolean; + }): string | null { + // If warmup is disabled, return null (caller will use default IP) + if (!this.config.enabled || this.config.ipAddresses.length === 0) { + return null; + } + + // Prepare information for allocation policy + const availableIPs = this.config.ipAddresses + .filter(ip => this.canSendMoreToday(ip) && this.canSendMoreThisHour(ip)) + .map(ip => { + const status = this.warmupStatuses.get(ip); + return { + ip, + priority: status ? status.currentStage : 1, + capacity: status ? (status.currentDailyAllocation - (this.dailySendCounts.get(ip) || 0)) : 0 + }; + }); + + // Use the active allocation policy to determine the best IP + const policy = this.allocationPolicies.get(this.activePolicy); + if (!policy) { + logger.log('warn', `No allocation policy named ${this.activePolicy} found`); + return null; + } + + return policy.allocateIP(availableIPs, { + ...emailInfo, + isTransactional: emailInfo.isTransactional || false, + isWarmup: true + }); + } + + /** + * Register a new IP allocation policy + * @param name Policy name + * @param policy Policy implementation + */ + public registerAllocationPolicy(name: string, policy: IIPAllocationPolicy): void { + this.allocationPolicies.set(name, policy); + logger.log('info', `Registered IP allocation policy: ${name}`); + } + + /** + * Set the active IP allocation policy + * @param name Policy name + */ + public setActiveAllocationPolicy(name: string): void { + if (!this.allocationPolicies.has(name)) { + logger.log('warn', `No allocation policy named ${name} found`); + return; + } + + this.activePolicy = name; + logger.log('info', `Set active IP allocation policy to ${name}`); + } + + /** + * Get the total number of stages in the warmup process + * @returns Number of stages + */ + public getStageCount(): number { + return this.config.stages.length; + } + + /** + * Load warmup statuses from storage + */ + private loadWarmupStatuses(): void { + try { + const warmupDir = plugins.path.join(paths.dataDir, 'warmup'); + plugins.smartfile.fs.ensureDirSync(warmupDir); + + const statusFile = plugins.path.join(warmupDir, 'ip_warmup_status.json'); + + if (plugins.fs.existsSync(statusFile)) { + const data = plugins.fs.readFileSync(statusFile, 'utf8'); + const statuses = JSON.parse(data); + + for (const status of statuses) { + // Restore date objects + status.startDate = new Date(status.startDate); + status.currentStageStartDate = new Date(status.currentStageStartDate); + status.targetCompletionDate = new Date(status.targetCompletionDate); + + this.warmupStatuses.set(status.ipAddress, status); + } + + logger.log('info', `Loaded ${this.warmupStatuses.size} IP warmup statuses from storage`); + } + } catch (error) { + logger.log('error', `Failed to load warmup statuses: ${error.message}`, { + stack: error.stack + }); + } + } + + /** + * Save warmup statuses to storage + */ + private saveWarmupStatuses(): void { + try { + const warmupDir = plugins.path.join(paths.dataDir, 'warmup'); + plugins.smartfile.fs.ensureDirSync(warmupDir); + + const statusFile = plugins.path.join(warmupDir, 'ip_warmup_status.json'); + const statuses = Array.from(this.warmupStatuses.values()); + + plugins.smartfile.memory.toFsSync( + JSON.stringify(statuses, null, 2), + statusFile + ); + + logger.log('debug', `Saved ${statuses.length} IP warmup statuses to storage`); + } catch (error) { + logger.log('error', `Failed to save warmup statuses: ${error.message}`, { + stack: error.stack + }); + } + } +} + +/** + * Policy that balances traffic across IPs based on stage and capacity + */ +class BalancedAllocationPolicy implements IIPAllocationPolicy { + name = 'balanced'; + + allocateIP( + availableIPs: Array<{ ip: string; priority: number; capacity: number }>, + emailInfo: { + from: string; + to: string[]; + domain: string; + isTransactional: boolean; + isWarmup: boolean; + } + ): string | null { + if (availableIPs.length === 0) return null; + + // Sort IPs by priority (prefer higher stage IPs) and capacity + const sortedIPs = [...availableIPs].sort((a, b) => { + // First by priority (descending) + if (b.priority !== a.priority) { + return b.priority - a.priority; + } + // Then by remaining capacity (descending) + return b.capacity - a.capacity; + }); + + // Prioritize higher-stage IPs for transactional emails + if (emailInfo.isTransactional) { + return sortedIPs[0].ip; + } + + // For marketing emails, spread across IPs with preference for higher stages + // Use weighted random selection based on stage + const totalWeight = sortedIPs.reduce((sum, ip) => sum + ip.priority, 0); + let randomPoint = Math.random() * totalWeight; + + for (const ip of sortedIPs) { + randomPoint -= ip.priority; + if (randomPoint <= 0) { + return ip.ip; + } + } + + // Fallback to the highest priority IP + return sortedIPs[0].ip; + } +} + +/** + * Policy that rotates through IPs in a round-robin fashion + */ +class RoundRobinAllocationPolicy implements IIPAllocationPolicy { + name = 'roundRobin'; + private lastIndex = -1; + + allocateIP( + availableIPs: Array<{ ip: string; priority: number; capacity: number }>, + emailInfo: { + from: string; + to: string[]; + domain: string; + isTransactional: boolean; + isWarmup: boolean; + } + ): string | null { + if (availableIPs.length === 0) return null; + + // Sort by capacity to ensure even distribution + const sortedIPs = [...availableIPs].sort((a, b) => b.capacity - a.capacity); + + // Move to next IP + this.lastIndex = (this.lastIndex + 1) % sortedIPs.length; + + return sortedIPs[this.lastIndex].ip; + } +} + +/** + * Policy that dedicates specific IPs to specific domains + */ +class DedicatedDomainPolicy implements IIPAllocationPolicy { + name = 'dedicated'; + private domainAssignments: Map = new Map(); + + allocateIP( + availableIPs: Array<{ ip: string; priority: number; capacity: number }>, + emailInfo: { + from: string; + to: string[]; + domain: string; + isTransactional: boolean; + isWarmup: boolean; + } + ): string | null { + if (availableIPs.length === 0) return null; + + // Check if we have a dedicated IP for this domain + if (this.domainAssignments.has(emailInfo.domain)) { + const dedicatedIP = this.domainAssignments.get(emailInfo.domain); + + // Check if the dedicated IP is in the available list + const isAvailable = availableIPs.some(ip => ip.ip === dedicatedIP); + + if (isAvailable) { + return dedicatedIP; + } + } + + // If not, assign one and save the assignment + const sortedIPs = [...availableIPs].sort((a, b) => b.capacity - a.capacity); + const assignedIP = sortedIPs[0].ip; + + this.domainAssignments.set(emailInfo.domain, assignedIP); + + return assignedIP; + } +} \ No newline at end of file diff --git a/ts/deliverability/classes.senderreputationmonitor.ts b/ts/deliverability/classes.senderreputationmonitor.ts new file mode 100644 index 0000000..cc47922 --- /dev/null +++ b/ts/deliverability/classes.senderreputationmonitor.ts @@ -0,0 +1,1116 @@ +import * as plugins from '../plugins.js'; +import * as paths from '../paths.js'; +import { logger } from '../logger.js'; + +/** + * Domain reputation metrics + */ +export interface IDomainReputationMetrics { + /** Domain being monitored */ + domain: string; + /** Date the metrics were last updated */ + lastUpdated: Date; + /** Sending volume metrics */ + volume: { + /** Total emails sent in the tracking period */ + sent: number; + /** Delivered emails (excluding bounces) */ + delivered: number; + /** Hard bounces */ + hardBounces: number; + /** Soft bounces */ + softBounces: number; + /** Daily sending volume for the last 30 days */ + dailySendVolume: Record; + }; + /** Engagement metrics */ + engagement: { + /** Number of opens */ + opens: number; + /** Number of clicks */ + clicks: number; + /** Calculated open rate (percentage) */ + openRate: number; + /** Calculated click rate (percentage) */ + clickRate: number; + /** Click-to-open rate (percentage) */ + clickToOpenRate: number; + }; + /** Complaint metrics */ + complaints: { + /** Number of spam complaints */ + total: number; + /** Complaint rate (percentage) */ + rate: number; + /** Domains with highest complaint rates */ + topDomains: Array<{ domain: string; rate: number; count: number }>; + }; + /** Authentication metrics */ + authentication: { + /** Percentage of emails with valid SPF */ + spfPassRate: number; + /** Percentage of emails with valid DKIM */ + dkimPassRate: number; + /** Percentage of emails with valid DMARC */ + dmarcPassRate: number; + /** Authentication failures */ + failures: Array<{ type: string; domain: string; count: number }>; + }; + /** Blocklist status */ + blocklist: { + /** Current blocklist status */ + listed: boolean; + /** Blocklists the domain is on, if any */ + activeListings: Array<{ list: string; listedSince: Date }>; + /** Recent delistings */ + recentDelistings: Array<{ list: string; listedFrom: Date; listedTo: Date }>; + }; + /** Inbox placement estimates */ + inboxPlacement: { + /** Overall inbox placement rate estimate */ + overall: number; + /** Inbox placement rates by major provider */ + providers: Record; + }; + /** Historical reputation scores */ + historical: { + /** Reputation scores for the last 30 days */ + reputationScores: Record; + /** Trends in key metrics */ + trends: { + /** Open rate trend (positive or negative percentage) */ + openRate: number; + /** Complaint rate trend */ + complaintRate: number; + /** Bounce rate trend */ + bounceRate: number; + /** Spam listing trend */ + spamListings: number; + }; + }; +} + +/** + * Configuration for reputation monitoring + */ +export interface IReputationMonitorConfig { + /** Whether monitoring is enabled */ + enabled?: boolean; + /** Domains to monitor */ + domains?: string[]; + /** How frequently to update metrics (ms) */ + updateFrequency?: number; + /** Endpoints for external data sources */ + dataSources?: { + /** Spam list monitoring service */ + spamLists?: string[]; + /** Deliverability monitoring service endpoint */ + deliverabilityMonitor?: string; + }; + /** Alerting thresholds */ + alertThresholds?: { + /** Minimum safe reputation score */ + minReputationScore?: number; + /** Maximum acceptable complaint rate */ + maxComplaintRate?: number; + /** Maximum acceptable bounce rate */ + maxBounceRate?: number; + /** Minimum acceptable open rate */ + minOpenRate?: number; + }; +} + +/** + * Reputation score components + */ +interface IReputationComponents { + /** Engagement score (0-100) */ + engagement: number; + /** Complaint score (0-100) */ + complaints: number; + /** Authentication score (0-100) */ + authentication: number; + /** Volume stability score (0-100) */ + volumeStability: number; + /** Infrastructure score (0-100) */ + infrastructure: number; + /** Blocklist score (0-100) */ + blocklist: number; +} + +/** + * Default configuration + */ +const DEFAULT_CONFIG: Required = { + enabled: true, + domains: [], + updateFrequency: 24 * 60 * 60 * 1000, // Daily + dataSources: { + spamLists: [ + 'zen.spamhaus.org', + 'bl.spamcop.net', + 'dnsbl.sorbs.net', + 'b.barracudacentral.org' + ], + deliverabilityMonitor: null + }, + alertThresholds: { + minReputationScore: 70, + maxComplaintRate: 0.1, // 0.1% + maxBounceRate: 5, // 5% + minOpenRate: 15 // 15% + } +}; + +/** + * Class for monitoring and tracking sender reputation for domains + */ +export class SenderReputationMonitor { + private static instance: SenderReputationMonitor; + private config: Required; + private reputationData: Map = new Map(); + private updateTimer: NodeJS.Timeout = null; + private isInitialized: boolean = false; + + /** + * Constructor for SenderReputationMonitor + * @param config Configuration options + */ + constructor(config: IReputationMonitorConfig = {}) { + // Merge with default config + this.config = { + ...DEFAULT_CONFIG, + ...config, + dataSources: { + ...DEFAULT_CONFIG.dataSources, + ...config.dataSources + }, + alertThresholds: { + ...DEFAULT_CONFIG.alertThresholds, + ...config.alertThresholds + } + }; + + // Initialize + this.initialize(); + } + + /** + * Get the singleton instance + * @param config Configuration options + * @returns Singleton instance + */ + public static getInstance(config: IReputationMonitorConfig = {}): SenderReputationMonitor { + if (!SenderReputationMonitor.instance) { + SenderReputationMonitor.instance = new SenderReputationMonitor(config); + } + return SenderReputationMonitor.instance; + } + + /** + * Initialize the reputation monitor + */ + private initialize(): void { + if (this.isInitialized) return; + + try { + // Load existing reputation data + this.loadReputationData(); + + // Initialize data for any new domains + for (const domain of this.config.domains) { + if (!this.reputationData.has(domain)) { + this.initializeDomainData(domain); + } + } + + // Schedule updates if enabled + if (this.config.enabled) { + this.scheduleUpdates(); + } + + this.isInitialized = true; + logger.log('info', `Sender Reputation Monitor initialized for ${this.config.domains.length} domains`); + } catch (error) { + logger.log('error', `Failed to initialize Sender Reputation Monitor: ${error.message}`, { + stack: error.stack + }); + } + } + + /** + * Initialize reputation data for a new domain + * @param domain Domain to initialize + */ + private initializeDomainData(domain: string): void { + // Create new domain reputation metrics with default values + const newMetrics: IDomainReputationMetrics = { + domain, + lastUpdated: new Date(), + volume: { + sent: 0, + delivered: 0, + hardBounces: 0, + softBounces: 0, + dailySendVolume: {} + }, + engagement: { + opens: 0, + clicks: 0, + openRate: 0, + clickRate: 0, + clickToOpenRate: 0 + }, + complaints: { + total: 0, + rate: 0, + topDomains: [] + }, + authentication: { + spfPassRate: 100, // Assume perfect initially + dkimPassRate: 100, + dmarcPassRate: 100, + failures: [] + }, + blocklist: { + listed: false, + activeListings: [], + recentDelistings: [] + }, + inboxPlacement: { + overall: 95, // Start with optimistic estimate + providers: { + gmail: 95, + outlook: 95, + yahoo: 95, + aol: 95, + other: 95 + } + }, + historical: { + reputationScores: {}, + trends: { + openRate: 0, + complaintRate: 0, + bounceRate: 0, + spamListings: 0 + } + } + }; + + // Generate some initial historical data points + const today = new Date(); + for (let i = 0; i < 30; i++) { + const date = new Date(today); + date.setDate(date.getDate() - i); + const dateKey = date.toISOString().split('T')[0]; + newMetrics.historical.reputationScores[dateKey] = 95; // Default good score + newMetrics.volume.dailySendVolume[dateKey] = 0; + } + + // Save the new metrics + this.reputationData.set(domain, newMetrics); + logger.log('info', `Initialized reputation data for domain ${domain}`); + } + + /** + * Schedule regular reputation data updates + */ + private scheduleUpdates(): void { + if (this.updateTimer) { + clearTimeout(this.updateTimer); + } + + this.updateTimer = setTimeout(async () => { + await this.updateAllDomainMetrics(); + this.scheduleUpdates(); // Reschedule for next update + }, this.config.updateFrequency); + + logger.log('info', `Scheduled reputation updates every ${this.config.updateFrequency / (60 * 60 * 1000)} hours`); + } + + /** + * Update metrics for all monitored domains + */ + private async updateAllDomainMetrics(): Promise { + if (!this.config.enabled) return; + + logger.log('info', 'Starting reputation metrics update for all domains'); + + for (const domain of this.config.domains) { + try { + await this.updateDomainMetrics(domain); + logger.log('info', `Updated reputation metrics for ${domain}`); + } catch (error) { + logger.log('error', `Error updating metrics for ${domain}: ${error.message}`, { + stack: error.stack + }); + } + } + + // Save all updated data + this.saveReputationData(); + + logger.log('info', 'Completed reputation metrics update for all domains'); + } + + /** + * Update reputation metrics for a specific domain + * @param domain Domain to update + */ + private async updateDomainMetrics(domain: string): Promise { + const metrics = this.reputationData.get(domain); + if (!metrics) { + logger.log('warn', `No reputation data found for domain ${domain}`); + return; + } + + try { + // Update last updated timestamp + metrics.lastUpdated = new Date(); + + // Check blocklist status + await this.checkBlocklistStatus(domain, metrics); + + // Update historical data + this.updateHistoricalData(metrics); + + // Calculate current reputation score + const reputationScore = this.calculateReputationScore(metrics); + + // Save current reputation score to historical data + const today = new Date().toISOString().split('T')[0]; + metrics.historical.reputationScores[today] = reputationScore; + + // Calculate trends + this.calculateTrends(metrics); + + // Check alert thresholds + this.checkAlertThresholds(metrics); + } catch (error) { + logger.log('error', `Error in updateDomainMetrics for ${domain}: ${error.message}`, { + stack: error.stack + }); + } + } + + /** + * Check domain blocklist status + * @param domain Domain to check + * @param metrics Metrics to update + */ + private async checkBlocklistStatus(domain: string, metrics: IDomainReputationMetrics): Promise { + if (!this.config.dataSources.spamLists?.length) { + return; + } + + const previouslyListed = metrics.blocklist.listed; + const previousListings = new Set(metrics.blocklist.activeListings.map(l => l.list)); + + // Store current listings to detect changes + const currentListings: Array<{ list: string; listedSince: Date }> = []; + + // Check each blocklist + for (const list of this.config.dataSources.spamLists) { + try { + const isListed = await this.checkDomainOnBlocklist(domain, list); + + if (isListed) { + // If already known to be listed on this one, keep the original listing date + const existingListing = metrics.blocklist.activeListings.find(l => l.list === list); + if (existingListing) { + currentListings.push(existingListing); + } else { + // New listing + currentListings.push({ + list, + listedSince: new Date() + }); + } + } + } catch (error) { + logger.log('warn', `Error checking ${domain} on blocklist ${list}: ${error.message}`); + } + } + + // Update active listings + metrics.blocklist.activeListings = currentListings; + metrics.blocklist.listed = currentListings.length > 0; + + // Check for delistings + if (previouslyListed) { + const currentListsSet = new Set(currentListings.map(l => l.list)); + + // Convert Set to Array for compatibility with older JS versions + Array.from(previousListings).forEach(list => { + if (!currentListsSet.has(list)) { + // This list no longer contains the domain - it was delisted + const previousListing = metrics.blocklist.activeListings.find(l => l.list === list); + + if (previousListing) { + metrics.blocklist.recentDelistings.push({ + list, + listedFrom: previousListing.listedSince, + listedTo: new Date() + }); + } + } + }); + + // Keep only recent delistings (last 90 days) + const ninetyDaysAgo = new Date(); + ninetyDaysAgo.setDate(ninetyDaysAgo.getDate() - 90); + + metrics.blocklist.recentDelistings = metrics.blocklist.recentDelistings + .filter(d => d.listedTo > ninetyDaysAgo); + } + } + + /** + * Check if a domain is on a specific blocklist + * @param domain Domain to check + * @param list Blocklist to check + * @returns Whether the domain is listed + */ + private async checkDomainOnBlocklist(domain: string, list: string): Promise { + try { + // Look up the domain in the blocklist (simplified) + if (list === 'zen.spamhaus.org') { + // For Spamhaus and similar lists, we check the domain MX IPs + const mxRecords = await plugins.dns.promises.resolveMx(domain); + + if (mxRecords && mxRecords.length > 0) { + // Check the primary MX record + const primaryMx = mxRecords.sort((a, b) => a.priority - b.priority)[0].exchange; + + // Resolve IP addresses for the MX + const ips = await plugins.dns.promises.resolve(primaryMx); + + // Check the first IP + if (ips.length > 0) { + const ip = ips[0]; + const reversedIp = ip.split('.').reverse().join('.'); + const lookupDomain = `${reversedIp}.${list}`; + + try { + await plugins.dns.promises.resolve(lookupDomain); + return true; // Listed + } catch (err) { + if (err.code === 'ENOTFOUND') { + return false; // Not listed + } + throw err; // Other error + } + } + } + return false; + } else { + // For domain-based blocklists + const lookupDomain = `${domain}.${list}`; + try { + await plugins.dns.promises.resolve(lookupDomain); + return true; // Listed + } catch (err) { + if (err.code === 'ENOTFOUND') { + return false; // Not listed + } + throw err; // Other error + } + } + } catch (error) { + logger.log('warn', `Error checking blocklist status for ${domain} on ${list}: ${error.message}`); + return false; // Assume not listed on error + } + } + + /** + * Update historical data in metrics + * @param metrics Metrics to update + */ + private updateHistoricalData(metrics: IDomainReputationMetrics): void { + // Keep only the last 30 days of data + const dates = Object.keys(metrics.historical.reputationScores) + .sort((a, b) => b.localeCompare(a)); // Sort descending + + if (dates.length > 30) { + const daysToKeep = dates.slice(0, 30); + const newScores: Record = {}; + + for (const day of daysToKeep) { + newScores[day] = metrics.historical.reputationScores[day]; + } + + metrics.historical.reputationScores = newScores; + } + + // Same for daily send volume + const volumeDates = Object.keys(metrics.volume.dailySendVolume) + .sort((a, b) => b.localeCompare(a)); + + if (volumeDates.length > 30) { + const daysToKeep = volumeDates.slice(0, 30); + const newVolume: Record = {}; + + for (const day of daysToKeep) { + newVolume[day] = metrics.volume.dailySendVolume[day]; + } + + metrics.volume.dailySendVolume = newVolume; + } + } + + /** + * Calculate reputation score from metrics + * @param metrics Domain reputation metrics + * @returns Reputation score (0-100) + */ + private calculateReputationScore(metrics: IDomainReputationMetrics): number { + // Calculate component scores + const components: IReputationComponents = { + engagement: this.calculateEngagementScore(metrics), + complaints: this.calculateComplaintScore(metrics), + authentication: this.calculateAuthenticationScore(metrics), + volumeStability: this.calculateVolumeStabilityScore(metrics), + infrastructure: this.calculateInfrastructureScore(metrics), + blocklist: this.calculateBlocklistScore(metrics) + }; + + // Apply weights to components + const weightedScore = + components.engagement * 0.25 + + components.complaints * 0.25 + + components.authentication * 0.2 + + components.volumeStability * 0.1 + + components.infrastructure * 0.1 + + components.blocklist * 0.1; + + // Round to 2 decimal places + return Math.round(weightedScore * 100) / 100; + } + + /** + * Calculate engagement component score + * @param metrics Domain metrics + * @returns Engagement score (0-100) + */ + private calculateEngagementScore(metrics: IDomainReputationMetrics): number { + const openRate = metrics.engagement.openRate; + const clickRate = metrics.engagement.clickRate; + + // Benchmark open and click rates + // <5% open rate = poor (score: 0-30) + // 5-15% = average (score: 30-70) + // >15% = good (score: 70-100) + let openScore = 0; + if (openRate < 5) { + openScore = openRate * 6; // 0-30 scale + } else if (openRate < 15) { + openScore = 30 + (openRate - 5) * 4; // 30-70 scale + } else { + openScore = 70 + Math.min(30, (openRate - 15) * 2); // 70-100 scale + } + + // Similarly for click rate + let clickScore = 0; + if (clickRate < 1) { + clickScore = clickRate * 30; // 0-30 scale + } else if (clickRate < 5) { + clickScore = 30 + (clickRate - 1) * 10; // 30-70 scale + } else { + clickScore = 70 + Math.min(30, (clickRate - 5) * 6); // 70-100 scale + } + + // Combine with 60% weight to open rate, 40% to click rate + return (openScore * 0.6 + clickScore * 0.4); + } + + /** + * Calculate complaint component score + * @param metrics Domain metrics + * @returns Complaint score (0-100) + */ + private calculateComplaintScore(metrics: IDomainReputationMetrics): number { + const complaintRate = metrics.complaints.rate; + + // Industry standard: complaint rate should be under 0.1% + // 0% = perfect (score: 100) + // 0.1% = threshold (score: 70) + // 0.5% = problematic (score: 30) + // 1%+ = critical (score: 0) + + if (complaintRate === 0) return 100; + if (complaintRate >= 1) return 0; + + if (complaintRate < 0.1) { + // 0-0.1% maps to 100-70 + return 100 - (complaintRate / 0.1) * 30; + } else if (complaintRate < 0.5) { + // 0.1-0.5% maps to 70-30 + return 70 - ((complaintRate - 0.1) / 0.4) * 40; + } else { + // 0.5-1% maps to 30-0 + return 30 - ((complaintRate - 0.5) / 0.5) * 30; + } + } + + /** + * Calculate authentication component score + * @param metrics Domain metrics + * @returns Authentication score (0-100) + */ + private calculateAuthenticationScore(metrics: IDomainReputationMetrics): number { + const spfRate = metrics.authentication.spfPassRate; + const dkimRate = metrics.authentication.dkimPassRate; + const dmarcRate = metrics.authentication.dmarcPassRate; + + // Weight SPF, DKIM, and DMARC + return (spfRate * 0.3 + dkimRate * 0.3 + dmarcRate * 0.4); + } + + /** + * Calculate volume stability component score + * @param metrics Domain metrics + * @returns Volume stability score (0-100) + */ + private calculateVolumeStabilityScore(metrics: IDomainReputationMetrics): number { + const volumes = Object.values(metrics.volume.dailySendVolume); + + if (volumes.length < 2) return 100; // Not enough data + + // Calculate coefficient of variation (stdev / mean) + const mean = volumes.reduce((sum, v) => sum + v, 0) / volumes.length; + if (mean === 0) return 100; // No sending activity + + const variance = volumes.reduce((sum, v) => sum + Math.pow(v - mean, 2), 0) / volumes.length; + const stdev = Math.sqrt(variance); + const cv = stdev / mean; + + // Convert to score: lower CV means more stability + // CV < 0.1 is very stable (score: 90-100) + // CV < 0.5 is normal (score: 60-90) + // CV < 1.0 is somewhat unstable (score: 30-60) + // CV >= 1.0 is unstable (score: 0-30) + + if (cv < 0.1) { + return 90 + (1 - cv / 0.1) * 10; + } else if (cv < 0.5) { + return 60 + (1 - (cv - 0.1) / 0.4) * 30; + } else if (cv < 1.0) { + return 30 + (1 - (cv - 0.5) / 0.5) * 30; + } else { + return Math.max(0, 30 - (cv - 1.0) * 10); + } + } + + /** + * Calculate infrastructure component score + * @param metrics Domain metrics + * @returns Infrastructure score (0-100) + */ + private calculateInfrastructureScore(metrics: IDomainReputationMetrics): number { + // This is a placeholder; in reality, this would be based on: + // - IP reputation + // - Reverse DNS configuration + // - IP warming status + // - Historical IP behavior + + // For now, assume good infrastructure + return 90; + } + + /** + * Calculate blocklist component score + * @param metrics Domain metrics + * @returns Blocklist score (0-100) + */ + private calculateBlocklistScore(metrics: IDomainReputationMetrics): number { + // If currently listed on any blocklist, score is heavily impacted + if (metrics.blocklist.listed) { + // Number of active listings determines severity + const listingCount = metrics.blocklist.activeListings.length; + if (listingCount >= 3) return 0; // Critical: listed on 3+ lists + if (listingCount === 2) return 20; // Severe: listed on 2 lists + return 40; // Serious: listed on 1 list + } + + // If recently delisted, some penalty still applies + if (metrics.blocklist.recentDelistings.length > 0) { + // Check how recent the delistings are + const now = new Date(); + const mostRecent = metrics.blocklist.recentDelistings + .reduce((latest, delisting) => + delisting.listedTo > latest ? delisting.listedTo : latest, + new Date(0)); + + const daysSinceDelisting = Math.floor( + (now.getTime() - mostRecent.getTime()) / (24 * 60 * 60 * 1000) + ); + + // Score improves as time passes since delisting + if (daysSinceDelisting < 7) return 60; // Delisted within last week + if (daysSinceDelisting < 30) return 80; // Delisted within last month + return 90; // Delisted over a month ago + } + + // Never listed + return 100; + } + + /** + * Calculate trend metrics + * @param metrics Domain metrics to update + */ + private calculateTrends(metrics: IDomainReputationMetrics): void { + // Get dates in descending order + const dates = Object.keys(metrics.historical.reputationScores) + .sort((a, b) => b.localeCompare(a)); + + if (dates.length < 7) { + // Not enough data for trends + metrics.historical.trends = { + openRate: 0, + complaintRate: 0, + bounceRate: 0, + spamListings: 0 + }; + return; + } + + // Calculate trends over past 7 days compared to previous 7 days + const current7Days = dates.slice(0, 7); + const previous7Days = dates.slice(7, 14); + + if (previous7Days.length < 7) { + // Not enough historical data + return; + } + + // Calculate averages for the periods + const currentReputation = current7Days.reduce( + (sum, date) => sum + metrics.historical.reputationScores[date], 0 + ) / current7Days.length; + + const previousReputation = previous7Days.reduce( + (sum, date) => sum + metrics.historical.reputationScores[date], 0 + ) / previous7Days.length; + + // Calculate percent change + const reputationChange = ((currentReputation - previousReputation) / previousReputation) * 100; + + // For now, use reputation change for all trends (in a real implementation + // we would calculate each metric's trend separately) + metrics.historical.trends = { + openRate: reputationChange, + complaintRate: -reputationChange, // Inverse for complaint rate (negative is good) + bounceRate: -reputationChange, // Inverse for bounce rate + spamListings: -reputationChange // Inverse for spam listings + }; + } + + /** + * Check if metrics exceed alert thresholds + * @param metrics Domain metrics to check + */ + private checkAlertThresholds(metrics: IDomainReputationMetrics): void { + const thresholds = this.config.alertThresholds; + const today = new Date().toISOString().split('T')[0]; + const todayScore = metrics.historical.reputationScores[today] || 0; + + // Check reputation score + if (todayScore < thresholds.minReputationScore) { + this.sendAlert(metrics.domain, 'reputation_score', { + score: todayScore, + threshold: thresholds.minReputationScore + }); + } + + // Check complaint rate + if (metrics.complaints.rate > thresholds.maxComplaintRate) { + this.sendAlert(metrics.domain, 'complaint_rate', { + rate: metrics.complaints.rate, + threshold: thresholds.maxComplaintRate + }); + } + + // Check bounce rate + const bounceRate = (metrics.volume.hardBounces + metrics.volume.softBounces) / + Math.max(1, metrics.volume.sent) * 100; + + if (bounceRate > thresholds.maxBounceRate) { + this.sendAlert(metrics.domain, 'bounce_rate', { + rate: bounceRate, + threshold: thresholds.maxBounceRate + }); + } + + // Check open rate + if (metrics.engagement.openRate < thresholds.minOpenRate) { + this.sendAlert(metrics.domain, 'open_rate', { + rate: metrics.engagement.openRate, + threshold: thresholds.minOpenRate + }); + } + + // Check blocklist status + if (metrics.blocklist.listed) { + this.sendAlert(metrics.domain, 'blocklist', { + lists: metrics.blocklist.activeListings.map(l => l.list) + }); + } + } + + /** + * Send an alert for a reputation issue + * @param domain Domain with the issue + * @param alertType Type of alert + * @param data Alert data + */ + private sendAlert(domain: string, alertType: string, data: any): void { + logger.log('warn', `Reputation alert for ${domain}: ${alertType}`, data); + + // In a real implementation, this would send alerts via email, + // notification systems, webhooks, etc. + } + + /** + * Record a send event for domain reputation tracking + * @param domain The domain sending the email + * @param event Event details + */ + public recordSendEvent(domain: string, event: { + type: 'sent' | 'delivered' | 'bounce' | 'complaint' | 'open' | 'click'; + count?: number; + hardBounce?: boolean; + receivingDomain?: string; + }): void { + // Ensure we have metrics for this domain + if (!this.reputationData.has(domain)) { + this.initializeDomainData(domain); + } + + const metrics = this.reputationData.get(domain); + const count = event.count || 1; + const today = new Date().toISOString().split('T')[0]; + + // Update metrics based on event type + switch (event.type) { + case 'sent': + metrics.volume.sent += count; + // Update daily send volume + metrics.volume.dailySendVolume[today] = + (metrics.volume.dailySendVolume[today] || 0) + count; + break; + + case 'delivered': + metrics.volume.delivered += count; + break; + + case 'bounce': + if (event.hardBounce) { + metrics.volume.hardBounces += count; + } else { + metrics.volume.softBounces += count; + } + break; + + case 'complaint': + metrics.complaints.total += count; + + // Track by receiving domain + if (event.receivingDomain) { + const domainIndex = metrics.complaints.topDomains.findIndex( + d => d.domain === event.receivingDomain + ); + + if (domainIndex >= 0) { + metrics.complaints.topDomains[domainIndex].count += count; + metrics.complaints.topDomains[domainIndex].rate = + metrics.complaints.topDomains[domainIndex].count / Math.max(1, metrics.volume.sent); + } else { + metrics.complaints.topDomains.push({ + domain: event.receivingDomain, + count, + rate: count / Math.max(1, metrics.volume.sent) + }); + } + + // Sort by count + metrics.complaints.topDomains.sort((a, b) => b.count - a.count); + + // Keep only top 10 + if (metrics.complaints.topDomains.length > 10) { + metrics.complaints.topDomains = metrics.complaints.topDomains.slice(0, 10); + } + } + + // Update overall complaint rate + metrics.complaints.rate = + metrics.complaints.total / Math.max(1, metrics.volume.sent); + break; + + case 'open': + metrics.engagement.opens += count; + metrics.engagement.openRate = + metrics.engagement.opens / Math.max(1, metrics.volume.delivered); + break; + + case 'click': + metrics.engagement.clicks += count; + metrics.engagement.clickRate = + metrics.engagement.clicks / Math.max(1, metrics.volume.delivered); + metrics.engagement.clickToOpenRate = + metrics.engagement.clicks / Math.max(1, metrics.engagement.opens); + break; + } + + // Update last updated timestamp + metrics.lastUpdated = new Date(); + + // Save data periodically (not after every event to avoid excessive I/O) + if (Math.random() < 0.01) { // ~1% chance to save on each event + this.saveReputationData(); + } + } + + /** + * Get reputation data for a domain + * @param domain Domain to get data for + * @returns Reputation data + */ + public getReputationData(domain: string): IDomainReputationMetrics | null { + return this.reputationData.get(domain) || null; + } + + /** + * Get summary reputation data for all domains + * @returns Summary data for all domains + */ + public getReputationSummary(): Array<{ + domain: string; + score: number; + status: 'excellent' | 'good' | 'fair' | 'poor' | 'critical'; + listed: boolean; + trend: number; + }> { + return Array.from(this.reputationData.entries()) + .map(([domain, metrics]) => { + const today = new Date().toISOString().split('T')[0]; + const score = metrics.historical.reputationScores[today] || 0; + + // Determine status based on score + let status: 'excellent' | 'good' | 'fair' | 'poor' | 'critical'; + if (score >= 90) status = 'excellent'; + else if (score >= 75) status = 'good'; + else if (score >= 60) status = 'fair'; + else if (score >= 40) status = 'poor'; + else status = 'critical'; + + return { + domain, + score, + status, + listed: metrics.blocklist.listed, + trend: metrics.historical.trends.openRate // Use open rate trend as overall trend + }; + }) + .sort((a, b) => b.score - a.score); // Sort by score descending + } + + /** + * Add a domain to monitor + * @param domain Domain to monitor + */ + public addDomain(domain: string): void { + if (this.config.domains.includes(domain)) { + logger.log('info', `Domain ${domain} is already being monitored`); + return; + } + + this.config.domains.push(domain); + this.initializeDomainData(domain); + this.saveReputationData(); + + logger.log('info', `Added ${domain} to reputation monitoring`); + } + + /** + * Remove a domain from monitoring + * @param domain Domain to remove + */ + public removeDomain(domain: string): void { + const index = this.config.domains.indexOf(domain); + if (index === -1) { + logger.log('info', `Domain ${domain} is not being monitored`); + return; + } + + this.config.domains.splice(index, 1); + this.reputationData.delete(domain); + this.saveReputationData(); + + logger.log('info', `Removed ${domain} from reputation monitoring`); + } + + /** + * Load reputation data from storage + */ + private loadReputationData(): void { + try { + const reputationDir = plugins.path.join(paths.dataDir, 'reputation'); + plugins.smartfile.fs.ensureDirSync(reputationDir); + + const dataFile = plugins.path.join(reputationDir, 'domain_reputation.json'); + + if (plugins.fs.existsSync(dataFile)) { + const data = plugins.fs.readFileSync(dataFile, 'utf8'); + const reputationEntries = JSON.parse(data); + + for (const entry of reputationEntries) { + // Restore Date objects + entry.lastUpdated = new Date(entry.lastUpdated); + + for (const listing of entry.blocklist.activeListings) { + listing.listedSince = new Date(listing.listedSince); + } + + for (const delisting of entry.blocklist.recentDelistings) { + delisting.listedFrom = new Date(delisting.listedFrom); + delisting.listedTo = new Date(delisting.listedTo); + } + + this.reputationData.set(entry.domain, entry); + } + + logger.log('info', `Loaded reputation data for ${this.reputationData.size} domains`); + } + } catch (error) { + logger.log('error', `Failed to load reputation data: ${error.message}`, { + stack: error.stack + }); + } + } + + /** + * Save reputation data to storage + */ + private saveReputationData(): void { + try { + const reputationDir = plugins.path.join(paths.dataDir, 'reputation'); + plugins.smartfile.fs.ensureDirSync(reputationDir); + + const dataFile = plugins.path.join(reputationDir, 'domain_reputation.json'); + const reputationEntries = Array.from(this.reputationData.values()); + + plugins.smartfile.memory.toFsSync( + JSON.stringify(reputationEntries, null, 2), + dataFile + ); + + logger.log('debug', `Saved reputation data for ${reputationEntries.length} domains`); + } catch (error) { + logger.log('error', `Failed to save reputation data: ${error.message}`, { + stack: error.stack + }); + } + } +} \ No newline at end of file diff --git a/ts/deliverability/index.ts b/ts/deliverability/index.ts new file mode 100644 index 0000000..b4b9766 --- /dev/null +++ b/ts/deliverability/index.ts @@ -0,0 +1,13 @@ +export { + IPWarmupManager, + type IIPWarmupConfig, + type IWarmupStage, + type IIPWarmupStatus, + type IIPAllocationPolicy +} from './classes.ipwarmupmanager.js'; + +export { + SenderReputationMonitor, + type IDomainReputationMetrics, + type IReputationMonitorConfig +} from './classes.senderreputationmonitor.js'; \ No newline at end of file diff --git a/ts/email/classes.bouncemanager.ts b/ts/email/classes.bouncemanager.ts new file mode 100644 index 0000000..4ad77e3 --- /dev/null +++ b/ts/email/classes.bouncemanager.ts @@ -0,0 +1,902 @@ +import * as plugins from '../plugins.js'; +import * as paths from '../paths.js'; +import { logger } from '../logger.js'; +import { SecurityLogger, SecurityLogLevel, SecurityEventType } from '../security/index.js'; +import { LRUCache } from 'lru-cache'; + +/** + * Bounce types for categorizing the reasons for bounces + */ +export enum BounceType { + // Hard bounces (permanent failures) + INVALID_RECIPIENT = 'invalid_recipient', + DOMAIN_NOT_FOUND = 'domain_not_found', + MAILBOX_FULL = 'mailbox_full', + MAILBOX_INACTIVE = 'mailbox_inactive', + BLOCKED = 'blocked', + SPAM_RELATED = 'spam_related', + POLICY_RELATED = 'policy_related', + + // Soft bounces (temporary failures) + SERVER_UNAVAILABLE = 'server_unavailable', + TEMPORARY_FAILURE = 'temporary_failure', + QUOTA_EXCEEDED = 'quota_exceeded', + NETWORK_ERROR = 'network_error', + TIMEOUT = 'timeout', + + // Special cases + AUTO_RESPONSE = 'auto_response', + CHALLENGE_RESPONSE = 'challenge_response', + UNKNOWN = 'unknown' +} + +/** + * Hard vs soft bounce classification + */ +export enum BounceCategory { + HARD = 'hard', + SOFT = 'soft', + AUTO_RESPONSE = 'auto_response', + UNKNOWN = 'unknown' +} + +/** + * Bounce data structure + */ +export interface BounceRecord { + id: string; + originalEmailId?: string; + recipient: string; + sender: string; + domain: string; + subject?: string; + bounceType: BounceType; + bounceCategory: BounceCategory; + timestamp: number; + smtpResponse?: string; + diagnosticCode?: string; + statusCode?: string; + headers?: Record; + processed: boolean; + retryCount?: number; + nextRetryTime?: number; +} + +/** + * Email bounce patterns to identify bounce types in SMTP responses and bounce messages + */ +const BOUNCE_PATTERNS = { + // Hard bounce patterns + [BounceType.INVALID_RECIPIENT]: [ + /no such user/i, + /user unknown/i, + /does not exist/i, + /invalid recipient/i, + /unknown recipient/i, + /no mailbox/i, + /user not found/i, + /recipient address rejected/i, + /550 5\.1\.1/i + ], + [BounceType.DOMAIN_NOT_FOUND]: [ + /domain not found/i, + /unknown domain/i, + /no such domain/i, + /host not found/i, + /domain invalid/i, + /550 5\.1\.2/i + ], + [BounceType.MAILBOX_FULL]: [ + /mailbox full/i, + /over quota/i, + /quota exceeded/i, + /552 5\.2\.2/i + ], + [BounceType.MAILBOX_INACTIVE]: [ + /mailbox disabled/i, + /mailbox inactive/i, + /account disabled/i, + /mailbox not active/i, + /account suspended/i + ], + [BounceType.BLOCKED]: [ + /blocked/i, + /rejected/i, + /denied/i, + /blacklisted/i, + /prohibited/i, + /refused/i, + /550 5\.7\./i + ], + [BounceType.SPAM_RELATED]: [ + /spam/i, + /bulk mail/i, + /content rejected/i, + /message rejected/i, + /550 5\.7\.1/i + ], + + // Soft bounce patterns + [BounceType.SERVER_UNAVAILABLE]: [ + /server unavailable/i, + /service unavailable/i, + /try again later/i, + /try later/i, + /451 4\.3\./i, + /421 4\.3\./i + ], + [BounceType.TEMPORARY_FAILURE]: [ + /temporary failure/i, + /temporary error/i, + /temporary problem/i, + /try again/i, + /451 4\./i + ], + [BounceType.QUOTA_EXCEEDED]: [ + /quota temporarily exceeded/i, + /mailbox temporarily full/i, + /452 4\.2\.2/i + ], + [BounceType.NETWORK_ERROR]: [ + /network error/i, + /connection error/i, + /connection timed out/i, + /routing error/i, + /421 4\.4\./i + ], + [BounceType.TIMEOUT]: [ + /timed out/i, + /timeout/i, + /450 4\.4\.2/i + ], + + // Auto-responses + [BounceType.AUTO_RESPONSE]: [ + /auto[- ]reply/i, + /auto[- ]response/i, + /vacation/i, + /out of office/i, + /away from office/i, + /on vacation/i, + /automatic reply/i + ], + [BounceType.CHALLENGE_RESPONSE]: [ + /challenge[- ]response/i, + /verify your email/i, + /confirm your email/i, + /email verification/i + ] +}; + +/** + * Retry strategy configuration for soft bounces + */ +interface RetryStrategy { + maxRetries: number; + initialDelay: number; // milliseconds + maxDelay: number; // milliseconds + backoffFactor: number; +} + +/** + * Manager for handling email bounces + */ +export class BounceManager { + // Retry strategy with exponential backoff + private retryStrategy: RetryStrategy = { + maxRetries: 5, + initialDelay: 15 * 60 * 1000, // 15 minutes + maxDelay: 24 * 60 * 60 * 1000, // 24 hours + backoffFactor: 2 + }; + + // Store of bounced emails + private bounceStore: BounceRecord[] = []; + + // Cache of recently bounced email addresses to avoid sending to known bad addresses + private bounceCache: LRUCache; + + // Suppression list for addresses that should not receive emails + private suppressionList: Map = new Map(); + + constructor(options?: { + retryStrategy?: Partial; + maxCacheSize?: number; + cacheTTL?: number; + }) { + // Set retry strategy with defaults + if (options?.retryStrategy) { + this.retryStrategy = { + ...this.retryStrategy, + ...options.retryStrategy + }; + } + + // Initialize bounce cache with LRU (least recently used) caching + this.bounceCache = new LRUCache({ + max: options?.maxCacheSize || 10000, + ttl: options?.cacheTTL || 30 * 24 * 60 * 60 * 1000, // 30 days default + }); + + // Load suppression list from storage + this.loadSuppressionList(); + } + + /** + * Process a bounce notification + * @param bounceData Bounce data to process + * @returns Processed bounce record + */ + public async processBounce(bounceData: Partial): Promise { + try { + // Add required fields if missing + const bounce: BounceRecord = { + id: bounceData.id || plugins.uuid.v4(), + recipient: bounceData.recipient, + sender: bounceData.sender, + domain: bounceData.domain || bounceData.recipient.split('@')[1], + subject: bounceData.subject, + bounceType: bounceData.bounceType || BounceType.UNKNOWN, + bounceCategory: bounceData.bounceCategory || BounceCategory.UNKNOWN, + timestamp: bounceData.timestamp || Date.now(), + smtpResponse: bounceData.smtpResponse, + diagnosticCode: bounceData.diagnosticCode, + statusCode: bounceData.statusCode, + headers: bounceData.headers, + processed: false, + originalEmailId: bounceData.originalEmailId, + retryCount: bounceData.retryCount || 0, + nextRetryTime: bounceData.nextRetryTime + }; + + // Determine bounce type and category if not provided + if (!bounceData.bounceType || bounceData.bounceType === BounceType.UNKNOWN) { + const bounceInfo = this.detectBounceType( + bounce.smtpResponse || '', + bounce.diagnosticCode || '', + bounce.statusCode || '' + ); + + bounce.bounceType = bounceInfo.type; + bounce.bounceCategory = bounceInfo.category; + } + + // Process the bounce based on category + switch (bounce.bounceCategory) { + case BounceCategory.HARD: + // Handle hard bounce - add to suppression list + await this.handleHardBounce(bounce); + break; + + case BounceCategory.SOFT: + // Handle soft bounce - schedule retry if eligible + await this.handleSoftBounce(bounce); + break; + + case BounceCategory.AUTO_RESPONSE: + // Handle auto-response - typically no action needed + logger.log('info', `Auto-response detected for ${bounce.recipient}`); + break; + + default: + // Unknown bounce type - log for investigation + logger.log('warn', `Unknown bounce type for ${bounce.recipient}`, { + bounceType: bounce.bounceType, + smtpResponse: bounce.smtpResponse + }); + break; + } + + // Store the bounce record + bounce.processed = true; + this.bounceStore.push(bounce); + + // Update the bounce cache + this.updateBounceCache(bounce); + + // Log the bounce + logger.log( + bounce.bounceCategory === BounceCategory.HARD ? 'warn' : 'info', + `Email bounce processed: ${bounce.bounceCategory} bounce for ${bounce.recipient}`, + { + bounceType: bounce.bounceType, + domain: bounce.domain, + category: bounce.bounceCategory + } + ); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: bounce.bounceCategory === BounceCategory.HARD + ? SecurityLogLevel.WARN + : SecurityLogLevel.INFO, + type: SecurityEventType.EMAIL_VALIDATION, + message: `Email bounce detected: ${bounce.bounceCategory} bounce for recipient`, + domain: bounce.domain, + details: { + recipient: bounce.recipient, + bounceType: bounce.bounceType, + smtpResponse: bounce.smtpResponse, + diagnosticCode: bounce.diagnosticCode, + statusCode: bounce.statusCode + }, + success: false + }); + + return bounce; + } catch (error) { + logger.log('error', `Error processing bounce: ${error.message}`, { + error: error.message, + bounceData + }); + throw error; + } + } + + /** + * Process an SMTP failure as a bounce + * @param recipient Recipient email + * @param smtpResponse SMTP error response + * @param options Additional options + * @returns Processed bounce record + */ + public async processSmtpFailure( + recipient: string, + smtpResponse: string, + options: { + sender?: string; + originalEmailId?: string; + statusCode?: string; + headers?: Record; + } = {} + ): Promise { + // Create bounce data from SMTP failure + const bounceData: Partial = { + recipient, + sender: options.sender || '', + domain: recipient.split('@')[1], + smtpResponse, + statusCode: options.statusCode, + headers: options.headers, + originalEmailId: options.originalEmailId, + timestamp: Date.now() + }; + + // Process as a regular bounce + return this.processBounce(bounceData); + } + + /** + * Process a bounce notification email + * @param bounceEmail The email containing bounce information + * @returns Processed bounce record or null if not a bounce + */ + public async processBounceEmail(bounceEmail: plugins.smartmail.Smartmail): Promise { + try { + // Check if this is a bounce notification + const subject = bounceEmail.getSubject(); + const body = bounceEmail.getBody(); + + // Check for common bounce notification subject patterns + const isBounceSubject = /mail delivery|delivery (failed|status|notification)|failure notice|returned mail|undeliverable|delivery problem/i.test(subject); + + if (!isBounceSubject) { + // Not a bounce notification based on subject + return null; + } + + // Extract original recipient from the body or headers + let recipient = ''; + let originalMessageId = ''; + + // Extract recipient from common bounce formats + const recipientMatch = body.match(/(?:failed recipient|to[:=]\s*|recipient:|delivery failed:)\s*?/i); + if (recipientMatch && recipientMatch[1]) { + recipient = recipientMatch[1]; + } + + // Extract diagnostic code + let diagnosticCode = ''; + const diagnosticMatch = body.match(/diagnostic(?:-|\\s+)code:\s*(.+)(?:\n|$)/i); + if (diagnosticMatch && diagnosticMatch[1]) { + diagnosticCode = diagnosticMatch[1].trim(); + } + + // Extract SMTP status code + let statusCode = ''; + const statusMatch = body.match(/status(?:-|\\s+)code:\s*([0-9.]+)/i); + if (statusMatch && statusMatch[1]) { + statusCode = statusMatch[1].trim(); + } + + // If recipient not found in standard patterns, try DSN (Delivery Status Notification) format + if (!recipient) { + // Look for DSN format with Original-Recipient or Final-Recipient fields + const originalRecipientMatch = body.match(/original-recipient:.*?([a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,})/i); + const finalRecipientMatch = body.match(/final-recipient:.*?([a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,})/i); + + if (originalRecipientMatch && originalRecipientMatch[1]) { + recipient = originalRecipientMatch[1]; + } else if (finalRecipientMatch && finalRecipientMatch[1]) { + recipient = finalRecipientMatch[1]; + } + } + + // If still no recipient, can't process as bounce + if (!recipient) { + logger.log('warn', 'Could not extract recipient from bounce notification', { + subject, + sender: bounceEmail.options.from + }); + return null; + } + + // Extract original message ID if available + const messageIdMatch = body.match(/original[ -]message[ -]id:[ \t]*]+)>?/i); + if (messageIdMatch && messageIdMatch[1]) { + originalMessageId = messageIdMatch[1].trim(); + } + + // Create bounce data + const bounceData: Partial = { + recipient, + sender: bounceEmail.options.from, + domain: recipient.split('@')[1], + subject: bounceEmail.getSubject(), + diagnosticCode, + statusCode, + timestamp: Date.now(), + headers: {} + }; + + // Process as a regular bounce + return this.processBounce(bounceData); + } catch (error) { + logger.log('error', `Error processing bounce email: ${error.message}`); + return null; + } + } + + /** + * Handle a hard bounce by adding to suppression list + * @param bounce The bounce record + */ + private async handleHardBounce(bounce: BounceRecord): Promise { + // Add to suppression list permanently (no expiry) + this.addToSuppressionList(bounce.recipient, `Hard bounce: ${bounce.bounceType}`, undefined); + + // Increment bounce count in cache + this.updateBounceCache(bounce); + + // Save to permanent storage + this.saveBounceRecord(bounce); + + // Log hard bounce for monitoring + logger.log('warn', `Hard bounce for ${bounce.recipient}: ${bounce.bounceType}`, { + domain: bounce.domain, + smtpResponse: bounce.smtpResponse, + diagnosticCode: bounce.diagnosticCode + }); + } + + /** + * Handle a soft bounce by scheduling a retry if eligible + * @param bounce The bounce record + */ + private async handleSoftBounce(bounce: BounceRecord): Promise { + // Check if we've exceeded max retries + if (bounce.retryCount >= this.retryStrategy.maxRetries) { + logger.log('warn', `Max retries exceeded for ${bounce.recipient}, treating as hard bounce`); + + // Convert to hard bounce after max retries + bounce.bounceCategory = BounceCategory.HARD; + await this.handleHardBounce(bounce); + return; + } + + // Calculate next retry time with exponential backoff + const delay = Math.min( + this.retryStrategy.initialDelay * Math.pow(this.retryStrategy.backoffFactor, bounce.retryCount), + this.retryStrategy.maxDelay + ); + + bounce.retryCount++; + bounce.nextRetryTime = Date.now() + delay; + + // Add to suppression list temporarily (with expiry) + this.addToSuppressionList( + bounce.recipient, + `Soft bounce: ${bounce.bounceType}`, + bounce.nextRetryTime + ); + + // Log the retry schedule + logger.log('info', `Scheduled retry ${bounce.retryCount} for ${bounce.recipient} at ${new Date(bounce.nextRetryTime).toISOString()}`, { + bounceType: bounce.bounceType, + retryCount: bounce.retryCount, + nextRetry: bounce.nextRetryTime + }); + } + + /** + * Add an email address to the suppression list + * @param email Email address to suppress + * @param reason Reason for suppression + * @param expiresAt Expiration timestamp (undefined for permanent) + */ + public addToSuppressionList( + email: string, + reason: string, + expiresAt?: number + ): void { + this.suppressionList.set(email.toLowerCase(), { + reason, + timestamp: Date.now(), + expiresAt + }); + + this.saveSuppressionList(); + + logger.log('info', `Added ${email} to suppression list`, { + reason, + expiresAt: expiresAt ? new Date(expiresAt).toISOString() : 'permanent' + }); + } + + /** + * Remove an email address from the suppression list + * @param email Email address to remove + */ + public removeFromSuppressionList(email: string): void { + const wasRemoved = this.suppressionList.delete(email.toLowerCase()); + + if (wasRemoved) { + this.saveSuppressionList(); + logger.log('info', `Removed ${email} from suppression list`); + } + } + + /** + * Check if an email is on the suppression list + * @param email Email address to check + * @returns Whether the email is suppressed + */ + public isEmailSuppressed(email: string): boolean { + const lowercaseEmail = email.toLowerCase(); + const suppression = this.suppressionList.get(lowercaseEmail); + + if (!suppression) { + return false; + } + + // Check if suppression has expired + if (suppression.expiresAt && Date.now() > suppression.expiresAt) { + this.suppressionList.delete(lowercaseEmail); + this.saveSuppressionList(); + return false; + } + + return true; + } + + /** + * Get suppression information for an email + * @param email Email address to check + * @returns Suppression information or null if not suppressed + */ + public getSuppressionInfo(email: string): { + reason: string; + timestamp: number; + expiresAt?: number; + } | null { + const lowercaseEmail = email.toLowerCase(); + const suppression = this.suppressionList.get(lowercaseEmail); + + if (!suppression) { + return null; + } + + // Check if suppression has expired + if (suppression.expiresAt && Date.now() > suppression.expiresAt) { + this.suppressionList.delete(lowercaseEmail); + this.saveSuppressionList(); + return null; + } + + return suppression; + } + + /** + * Save suppression list to disk + */ + private saveSuppressionList(): void { + try { + const suppressionData = JSON.stringify(Array.from(this.suppressionList.entries())); + plugins.smartfile.memory.toFsSync( + suppressionData, + plugins.path.join(paths.dataDir, 'emails', 'suppression_list.json') + ); + } catch (error) { + logger.log('error', `Failed to save suppression list: ${error.message}`); + } + } + + /** + * Load suppression list from disk + */ + private loadSuppressionList(): void { + try { + const suppressionPath = plugins.path.join(paths.dataDir, 'emails', 'suppression_list.json'); + + if (plugins.fs.existsSync(suppressionPath)) { + const data = plugins.fs.readFileSync(suppressionPath, 'utf8'); + const entries = JSON.parse(data); + + this.suppressionList = new Map(entries); + + // Clean expired entries + const now = Date.now(); + let expiredCount = 0; + + for (const [email, info] of this.suppressionList.entries()) { + if (info.expiresAt && now > info.expiresAt) { + this.suppressionList.delete(email); + expiredCount++; + } + } + + if (expiredCount > 0) { + logger.log('info', `Cleaned ${expiredCount} expired entries from suppression list`); + this.saveSuppressionList(); + } + + logger.log('info', `Loaded ${this.suppressionList.size} entries from suppression list`); + } + } catch (error) { + logger.log('error', `Failed to load suppression list: ${error.message}`); + } + } + + /** + * Save bounce record to disk + * @param bounce Bounce record to save + */ + private saveBounceRecord(bounce: BounceRecord): void { + try { + const bounceData = JSON.stringify(bounce); + const bouncePath = plugins.path.join( + paths.dataDir, + 'emails', + 'bounces', + `${bounce.id}.json` + ); + + // Ensure directory exists + const bounceDir = plugins.path.join(paths.dataDir, 'emails', 'bounces'); + plugins.smartfile.fs.ensureDirSync(bounceDir); + + plugins.smartfile.memory.toFsSync(bounceData, bouncePath); + } catch (error) { + logger.log('error', `Failed to save bounce record: ${error.message}`); + } + } + + /** + * Update bounce cache with new bounce information + * @param bounce Bounce record to update cache with + */ + private updateBounceCache(bounce: BounceRecord): void { + const email = bounce.recipient.toLowerCase(); + const existing = this.bounceCache.get(email); + + if (existing) { + // Update existing cache entry + existing.lastBounce = bounce.timestamp; + existing.count++; + existing.type = bounce.bounceType; + existing.category = bounce.bounceCategory; + } else { + // Create new cache entry + this.bounceCache.set(email, { + lastBounce: bounce.timestamp, + count: 1, + type: bounce.bounceType, + category: bounce.bounceCategory + }); + } + } + + /** + * Check bounce history for an email address + * @param email Email address to check + * @returns Bounce information or null if no bounces + */ + public getBounceInfo(email: string): { + lastBounce: number; + count: number; + type: BounceType; + category: BounceCategory; + } | null { + return this.bounceCache.get(email.toLowerCase()) || null; + } + + /** + * Analyze SMTP response and diagnostic codes to determine bounce type + * @param smtpResponse SMTP response string + * @param diagnosticCode Diagnostic code from bounce + * @param statusCode Status code from bounce + * @returns Detected bounce type and category + */ + private detectBounceType( + smtpResponse: string, + diagnosticCode: string, + statusCode: string + ): { + type: BounceType; + category: BounceCategory; + } { + // Combine all text for comprehensive pattern matching + const fullText = `${smtpResponse} ${diagnosticCode} ${statusCode}`.toLowerCase(); + + // Check for auto-responses first + if (this.matchesPattern(fullText, BounceType.AUTO_RESPONSE) || + this.matchesPattern(fullText, BounceType.CHALLENGE_RESPONSE)) { + return { + type: BounceType.AUTO_RESPONSE, + category: BounceCategory.AUTO_RESPONSE + }; + } + + // Check for hard bounces + for (const bounceType of [ + BounceType.INVALID_RECIPIENT, + BounceType.DOMAIN_NOT_FOUND, + BounceType.MAILBOX_FULL, + BounceType.MAILBOX_INACTIVE, + BounceType.BLOCKED, + BounceType.SPAM_RELATED, + BounceType.POLICY_RELATED + ]) { + if (this.matchesPattern(fullText, bounceType)) { + return { + type: bounceType, + category: BounceCategory.HARD + }; + } + } + + // Check for soft bounces + for (const bounceType of [ + BounceType.SERVER_UNAVAILABLE, + BounceType.TEMPORARY_FAILURE, + BounceType.QUOTA_EXCEEDED, + BounceType.NETWORK_ERROR, + BounceType.TIMEOUT + ]) { + if (this.matchesPattern(fullText, bounceType)) { + return { + type: bounceType, + category: BounceCategory.SOFT + }; + } + } + + // Handle DSN (Delivery Status Notification) status codes + if (statusCode) { + // Format: class.subject.detail + const parts = statusCode.split('.'); + if (parts.length >= 2) { + const statusClass = parts[0]; + const statusSubject = parts[1]; + + // 5.X.X is permanent failure (hard bounce) + if (statusClass === '5') { + // Try to determine specific type based on subject + if (statusSubject === '1') { + return { type: BounceType.INVALID_RECIPIENT, category: BounceCategory.HARD }; + } else if (statusSubject === '2') { + return { type: BounceType.MAILBOX_FULL, category: BounceCategory.HARD }; + } else if (statusSubject === '7') { + return { type: BounceType.BLOCKED, category: BounceCategory.HARD }; + } else { + return { type: BounceType.UNKNOWN, category: BounceCategory.HARD }; + } + } + + // 4.X.X is temporary failure (soft bounce) + if (statusClass === '4') { + // Try to determine specific type based on subject + if (statusSubject === '2') { + return { type: BounceType.QUOTA_EXCEEDED, category: BounceCategory.SOFT }; + } else if (statusSubject === '3') { + return { type: BounceType.SERVER_UNAVAILABLE, category: BounceCategory.SOFT }; + } else if (statusSubject === '4') { + return { type: BounceType.NETWORK_ERROR, category: BounceCategory.SOFT }; + } else { + return { type: BounceType.TEMPORARY_FAILURE, category: BounceCategory.SOFT }; + } + } + } + } + + // Default to unknown + return { + type: BounceType.UNKNOWN, + category: BounceCategory.UNKNOWN + }; + } + + /** + * Check if text matches any pattern for a bounce type + * @param text Text to check against patterns + * @param bounceType Bounce type to get patterns for + * @returns Whether the text matches any pattern + */ + private matchesPattern(text: string, bounceType: BounceType): boolean { + const patterns = BOUNCE_PATTERNS[bounceType]; + + if (!patterns) { + return false; + } + + for (const pattern of patterns) { + if (pattern.test(text)) { + return true; + } + } + + return false; + } + + /** + * Get all known hard bounced addresses + * @returns Array of hard bounced email addresses + */ + public getHardBouncedAddresses(): string[] { + const hardBounced: string[] = []; + + for (const [email, info] of this.bounceCache.entries()) { + if (info.category === BounceCategory.HARD) { + hardBounced.push(email); + } + } + + return hardBounced; + } + + /** + * Get suppression list + * @returns Array of suppressed email addresses + */ + public getSuppressionList(): string[] { + return Array.from(this.suppressionList.keys()); + } + + /** + * Clear old bounce records (for maintenance) + * @param olderThan Timestamp to remove records older than + * @returns Number of records removed + */ + public clearOldBounceRecords(olderThan: number): number { + let removed = 0; + + this.bounceStore = this.bounceStore.filter(bounce => { + if (bounce.timestamp < olderThan) { + removed++; + return false; + } + return true; + }); + + return removed; + } +} \ No newline at end of file diff --git a/ts/email/classes.connector.mta.ts b/ts/email/classes.connector.mta.ts index ab5d4be..49d01fd 100644 --- a/ts/email/classes.connector.mta.ts +++ b/ts/email/classes.connector.mta.ts @@ -31,15 +31,42 @@ export class MtaConnector { toAddresses: string | string[], options: any = {} ): Promise { + // Check if recipients are on the suppression list + const recipients = Array.isArray(toAddresses) + ? toAddresses + : toAddresses.split(',').map(addr => addr.trim()); + + // Filter out suppressed recipients + const validRecipients = []; + const suppressedRecipients = []; + + for (const recipient of recipients) { + if (this.emailRef.bounceManager.isEmailSuppressed(recipient)) { + suppressedRecipients.push(recipient); + } else { + validRecipients.push(recipient); + } + } + + // Log suppressed recipients + if (suppressedRecipients.length > 0) { + logger.log('warn', `Skipping ${suppressedRecipients.length} suppressed recipients`, { + suppressedRecipients + }); + } + + // If all recipients are suppressed, throw error + if (validRecipients.length === 0) { + throw new Error('All recipients are on the suppression list'); + } + + // Continue with valid recipients try { - // Process recipients - const toArray = Array.isArray(toAddresses) - ? toAddresses - : toAddresses.split(',').map(addr => addr.trim()); + // Use filtered recipients - already an array, no need for toArray // Add recipients to smartmail if they're not already added if (!smartmail.options.to || smartmail.options.to.length === 0) { - for (const recipient of toArray) { + for (const recipient of validRecipients) { smartmail.addRecipient(recipient); } } @@ -57,15 +84,15 @@ export class MtaConnector { const mimeEmail = await smartmail.toMimeFormat(smartmail.options.creationObjectRef); // Parse the MIME email to create an MTA Email - return this.sendMimeEmail(mimeEmail, toArray); + return this.sendMimeEmail(mimeEmail, validRecipients); } catch (mimeError) { logger.log('warn', `Failed to use MIME format, falling back to direct conversion: ${mimeError.message}`); // Fall back to direct conversion - return this.sendDirectEmail(smartmail, toArray); + return this.sendDirectEmail(smartmail, validRecipients); } } else { // Use direct conversion - return this.sendDirectEmail(smartmail, toArray); + return this.sendDirectEmail(smartmail, validRecipients); } } catch (error) { logger.log('error', `Failed to send email via MTA: ${error.message}`, { @@ -73,6 +100,30 @@ export class MtaConnector { provider: 'mta', error: error.message }); + + // Check if this is a bounce-related error + if (error.message.includes('550') || // Rejected + error.message.includes('551') || // User not local + error.message.includes('552') || // Mailbox full + error.message.includes('553') || // Bad mailbox name + error.message.includes('554') || // Transaction failed + error.message.includes('does not exist') || + error.message.includes('unknown user') || + error.message.includes('invalid recipient')) { + + // Process as a bounce + for (const recipient of validRecipients) { + await this.emailRef.bounceManager.processSmtpFailure( + recipient, + error.message, + { + sender: smartmail.options.from, + statusCode: error.message.match(/\b([45]\d{2})\b/) ? error.message.match(/\b([45]\d{2})\b/)[1] : undefined + } + ); + } + } + throw error; } } diff --git a/ts/email/classes.emailservice.ts b/ts/email/classes.emailservice.ts index 4457e2d..0cc4704 100644 --- a/ts/email/classes.emailservice.ts +++ b/ts/email/classes.emailservice.ts @@ -5,6 +5,7 @@ import { RuleManager } from './classes.rulemanager.js'; import { ApiManager } from './classes.apimanager.js'; import { TemplateManager } from './classes.templatemanager.js'; import { EmailValidator } from './classes.emailvalidator.js'; +import { BounceManager } from './classes.bouncemanager.js'; import { logger } from '../logger.js'; import type { SzPlatformService } from '../platformservice.js'; @@ -44,6 +45,7 @@ export class EmailService { public ruleManager: RuleManager; public templateManager: TemplateManager; public emailValidator: EmailValidator; + public bounceManager: BounceManager; // configuration private config: IEmailConstructorOptions; @@ -62,6 +64,9 @@ export class EmailService { // Initialize validator this.emailValidator = new EmailValidator(); + + // Initialize bounce manager + this.bounceManager = new BounceManager(); // Initialize template manager this.templateManager = new TemplateManager(this.config.templateConfig); diff --git a/ts/email/classes.emailvalidator.ts b/ts/email/classes.emailvalidator.ts index b90087c..c3bc31a 100644 --- a/ts/email/classes.emailvalidator.ts +++ b/ts/email/classes.emailvalidator.ts @@ -1,5 +1,6 @@ import * as plugins from '../plugins.js'; import { logger } from '../logger.js'; +import { LRUCache } from 'lru-cache'; export interface IEmailValidationResult { isValid: boolean; @@ -21,10 +22,28 @@ export interface IEmailValidationResult { */ export class EmailValidator { private validator: plugins.smartmail.EmailAddressValidator; - private dnsCache: Map = new Map(); + private dnsCache: LRUCache; - constructor() { + constructor(options?: { + maxCacheSize?: number; + cacheTTL?: number; + }) { this.validator = new plugins.smartmail.EmailAddressValidator(); + + // Initialize LRU cache for DNS records + this.dnsCache = new LRUCache({ + // Default to 1000 entries (reasonable for most applications) + max: options?.maxCacheSize || 1000, + // Default TTL of 1 hour (DNS records don't change frequently) + ttl: options?.cacheTTL || 60 * 60 * 1000, + // Optional cache monitoring + allowStale: false, + updateAgeOnGet: true, + // Add logging for cache events in production environments + disposeAfter: (value, key) => { + logger.log('debug', `DNS cache entry expired for domain: ${key}`); + }, + }); } /** @@ -162,19 +181,20 @@ export class EmailValidator { * @returns Array of MX records */ private async getMxRecords(domain: string): Promise { - if (this.dnsCache.has(domain)) { - return this.dnsCache.get(domain); + // Check cache first + const cachedRecords = this.dnsCache.get(domain); + if (cachedRecords) { + logger.log('debug', `Using cached MX records for domain: ${domain}`); + return cachedRecords; } try { // Use smartmail's getMxRecords method const records = await this.validator.getMxRecords(domain); - this.dnsCache.set(domain, records); - // Cache expires after 1 hour - setTimeout(() => { - this.dnsCache.delete(domain); - }, 60 * 60 * 1000); + // Store in cache (TTL is handled by the LRU cache configuration) + this.dnsCache.set(domain, records); + logger.log('debug', `Cached MX records for domain: ${domain}`); return records; } catch (error) { diff --git a/ts/email/index.ts b/ts/email/index.ts index fbaa171..6425060 100644 --- a/ts/email/index.ts +++ b/ts/email/index.ts @@ -1,3 +1,19 @@ import { EmailService } from './classes.emailservice.js'; +import { BounceManager, BounceType, BounceCategory } from './classes.bouncemanager.js'; +import { EmailValidator } from './classes.emailvalidator.js'; +import { TemplateManager } from './classes.templatemanager.js'; +import { RuleManager } from './classes.rulemanager.js'; +import { ApiManager } from './classes.apimanager.js'; +import { MtaConnector } from './classes.connector.mta.js'; -export { EmailService as Email }; \ No newline at end of file +export { + EmailService as Email, + BounceManager, + BounceType, + BounceCategory, + EmailValidator, + TemplateManager, + RuleManager, + ApiManager, + MtaConnector +}; \ No newline at end of file diff --git a/ts/letter/classes.letterservice.ts b/ts/letter/classes.letterservice.ts deleted file mode 100644 index eab0462..0000000 --- a/ts/letter/classes.letterservice.ts +++ /dev/null @@ -1,41 +0,0 @@ -import type { SzPlatformService } from '../platformservice.js'; -import * as plugins from '../plugins.js'; - -export interface ILetterConstructorOptions { - letterxpressUser: string; - letterxpressToken: string; -} - -export class LetterService { - public platformServiceRef: SzPlatformService; - public options: ILetterConstructorOptions; - public letterxpressAccount: plugins.letterxpress.LetterXpressAccount; - public typedrouter = new plugins.typedrequest.TypedRouter(); - - constructor(platformServiceRefArg: SzPlatformService, optionsArg: ILetterConstructorOptions) { - this.platformServiceRef = platformServiceRefArg; - this.options = optionsArg; - this.platformServiceRef.typedrouter.addTypedRouter(this.typedrouter); - - this.typedrouter.addTypedHandler< - plugins.servezoneInterfaces.platformservice.letter.IRequest_SendLetter - >(new plugins.typedrequest.TypedHandler('sendLetter', async dataArg => { - if(dataArg.needsCover) { - - } - return { - processId: '', - } - })); - } - - public async start() { - this.letterxpressAccount = new plugins.letterxpress.LetterXpressAccount({ - username: this.options.letterxpressUser, - apiKey: this.options.letterxpressToken, - }); - await this.letterxpressAccount.start(); - } - - public async stop() {} -} diff --git a/ts/letter/index.ts b/ts/letter/index.ts deleted file mode 100644 index e64edc4..0000000 --- a/ts/letter/index.ts +++ /dev/null @@ -1 +0,0 @@ -export * from './classes.letterservice.js'; \ No newline at end of file diff --git a/ts/mta/classes.dkimverifier.ts b/ts/mta/classes.dkimverifier.ts index 29dc6f2..dfc0244 100644 --- a/ts/mta/classes.dkimverifier.ts +++ b/ts/mta/classes.dkimverifier.ts @@ -1,6 +1,7 @@ import * as plugins from '../plugins.js'; import { MtaService } from './classes.mta.js'; import { logger } from '../logger.js'; +import { SecurityLogger, SecurityLogLevel, SecurityEventType } from '../security/index.js'; /** * Result of a DKIM verification @@ -80,10 +81,34 @@ export class DKIMVerifier { }); logger.log(isValid ? 'info' : 'warn', `DKIM Verification using mailauth: ${isValid ? 'pass' : 'fail'} for domain ${dkimResult.domain}`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: isValid ? SecurityLogLevel.INFO : SecurityLogLevel.WARN, + type: SecurityEventType.DKIM, + message: `DKIM verification ${isValid ? 'passed' : 'failed'} for domain ${dkimResult.domain}`, + details: { + selector: dkimResult.selector, + signatureFields: dkimResult.signature, + result: dkimResult.status.result + }, + domain: dkimResult.domain, + success: isValid + }); + return result; } } catch (mailauthError) { logger.log('warn', `DKIM verification with mailauth failed, trying smartmail: ${mailauthError.message}`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.DKIM, + message: `DKIM verification with mailauth failed, trying smartmail fallback`, + details: { error: mailauthError.message }, + success: false + }); } // Fall back to smartmail for verification @@ -167,6 +192,20 @@ export class DKIMVerifier { }); logger.log('info', `DKIM verification using smartmail: pass for domain ${domain}`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.INFO, + type: SecurityEventType.DKIM, + message: `DKIM verification passed for domain ${domain} using fallback verification`, + details: { + selector, + signatureFields + }, + domain, + success: true + }); + return result; } else { // Missing domain or selector @@ -185,6 +224,17 @@ export class DKIMVerifier { }); logger.log('warn', `DKIM verification failed: Missing domain or selector in DKIM signature`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.DKIM, + message: `DKIM verification failed: Missing domain or selector in signature`, + details: { domain, selector, signatureFields }, + domain: domain || 'unknown', + success: false + }); + return result; } } catch (error) { @@ -200,11 +250,30 @@ export class DKIMVerifier { }); logger.log('error', `DKIM verification error: ${error.message}`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.DKIM, + message: `DKIM verification error during processing`, + details: { error: error.message }, + success: false + }); + return result; } } catch (error) { logger.log('error', `DKIM verification failed with unexpected error: ${error.message}`); + // Enhanced security logging for unexpected errors + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.DKIM, + message: `DKIM verification failed with unexpected error`, + details: { error: error.message }, + success: false + }); + return { isValid: false, status: 'temperror', @@ -241,6 +310,17 @@ export class DKIMVerifier { if (!txtRecords || txtRecords.length === 0) { logger.log('warn', `No DKIM TXT record found for ${dkimRecord}`); + + // Security logging for missing DKIM record + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.DKIM, + message: `No DKIM TXT record found for ${dkimRecord}`, + domain, + success: false, + details: { selector } + }); + return null; } @@ -256,9 +336,31 @@ export class DKIMVerifier { } logger.log('warn', `No valid DKIM public key found in TXT records for ${dkimRecord}`); + + // Security logging for invalid DKIM key + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.DKIM, + message: `No valid DKIM public key found in TXT records`, + domain, + success: false, + details: { dkimRecord, selector } + }); + return null; } catch (error) { logger.log('error', `Error fetching DKIM key: ${error.message}`); + + // Security logging for DKIM key fetch error + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.DKIM, + message: `Error fetching DKIM key for domain`, + domain, + success: false, + details: { error: error.message, selector, dkimRecord: `${selector}._domainkey.${domain}` } + }); + return null; } } diff --git a/ts/mta/classes.dmarcverifier.ts b/ts/mta/classes.dmarcverifier.ts new file mode 100644 index 0000000..ccf9359 --- /dev/null +++ b/ts/mta/classes.dmarcverifier.ts @@ -0,0 +1,475 @@ +import * as plugins from '../plugins.js'; +import { logger } from '../logger.js'; +import { SecurityLogger, SecurityLogLevel, SecurityEventType } from '../security/index.js'; +import type { MtaService } from './classes.mta.js'; +import type { Email } from './classes.email.js'; +import type { IDnsVerificationResult } from './classes.dnsmanager.js'; + +/** + * DMARC policy types + */ +export enum DmarcPolicy { + NONE = 'none', + QUARANTINE = 'quarantine', + REJECT = 'reject' +} + +/** + * DMARC alignment modes + */ +export enum DmarcAlignment { + RELAXED = 'r', + STRICT = 's' +} + +/** + * DMARC record fields + */ +export interface DmarcRecord { + // Required fields + version: string; + policy: DmarcPolicy; + + // Optional fields + subdomainPolicy?: DmarcPolicy; + pct?: number; + adkim?: DmarcAlignment; + aspf?: DmarcAlignment; + reportInterval?: number; + failureOptions?: string; + reportUriAggregate?: string[]; + reportUriForensic?: string[]; +} + +/** + * DMARC verification result + */ +export interface DmarcResult { + hasDmarc: boolean; + record?: DmarcRecord; + spfDomainAligned: boolean; + dkimDomainAligned: boolean; + spfPassed: boolean; + dkimPassed: boolean; + policyEvaluated: DmarcPolicy; + actualPolicy: DmarcPolicy; + appliedPercentage: number; + action: 'pass' | 'quarantine' | 'reject'; + details: string; + error?: string; +} + +/** + * Class for verifying and enforcing DMARC policies + */ +export class DmarcVerifier { + private mtaRef: MtaService; + + constructor(mtaRefArg: MtaService) { + this.mtaRef = mtaRefArg; + } + + /** + * Parse a DMARC record from a TXT record string + * @param record DMARC TXT record string + * @returns Parsed DMARC record or null if invalid + */ + public parseDmarcRecord(record: string): DmarcRecord | null { + if (!record.startsWith('v=DMARC1')) { + return null; + } + + try { + // Initialize record with default values + const dmarcRecord: DmarcRecord = { + version: 'DMARC1', + policy: DmarcPolicy.NONE, + pct: 100, + adkim: DmarcAlignment.RELAXED, + aspf: DmarcAlignment.RELAXED + }; + + // Split the record into tag/value pairs + const parts = record.split(';').map(part => part.trim()); + + for (const part of parts) { + if (!part || !part.includes('=')) continue; + + const [tag, value] = part.split('=').map(p => p.trim()); + + // Process based on tag + switch (tag.toLowerCase()) { + case 'v': + dmarcRecord.version = value; + break; + case 'p': + dmarcRecord.policy = value as DmarcPolicy; + break; + case 'sp': + dmarcRecord.subdomainPolicy = value as DmarcPolicy; + break; + case 'pct': + const pctValue = parseInt(value, 10); + if (!isNaN(pctValue) && pctValue >= 0 && pctValue <= 100) { + dmarcRecord.pct = pctValue; + } + break; + case 'adkim': + dmarcRecord.adkim = value as DmarcAlignment; + break; + case 'aspf': + dmarcRecord.aspf = value as DmarcAlignment; + break; + case 'ri': + const interval = parseInt(value, 10); + if (!isNaN(interval) && interval > 0) { + dmarcRecord.reportInterval = interval; + } + break; + case 'fo': + dmarcRecord.failureOptions = value; + break; + case 'rua': + dmarcRecord.reportUriAggregate = value.split(',').map(uri => { + if (uri.startsWith('mailto:')) { + return uri.substring(7).trim(); + } + return uri.trim(); + }); + break; + case 'ruf': + dmarcRecord.reportUriForensic = value.split(',').map(uri => { + if (uri.startsWith('mailto:')) { + return uri.substring(7).trim(); + } + return uri.trim(); + }); + break; + } + } + + // Ensure subdomain policy is set if not explicitly provided + if (!dmarcRecord.subdomainPolicy) { + dmarcRecord.subdomainPolicy = dmarcRecord.policy; + } + + return dmarcRecord; + } catch (error) { + logger.log('error', `Error parsing DMARC record: ${error.message}`, { + record, + error: error.message + }); + return null; + } + } + + /** + * Check if domains are aligned according to DMARC policy + * @param headerDomain Domain from header (From) + * @param authDomain Domain from authentication (SPF, DKIM) + * @param alignment Alignment mode + * @returns Whether the domains are aligned + */ + private isDomainAligned( + headerDomain: string, + authDomain: string, + alignment: DmarcAlignment + ): boolean { + if (!headerDomain || !authDomain) { + return false; + } + + // For strict alignment, domains must match exactly + if (alignment === DmarcAlignment.STRICT) { + return headerDomain.toLowerCase() === authDomain.toLowerCase(); + } + + // For relaxed alignment, the authenticated domain must be a subdomain of the header domain + // or the same as the header domain + const headerParts = headerDomain.toLowerCase().split('.'); + const authParts = authDomain.toLowerCase().split('.'); + + // Ensures we have at least two parts (domain and TLD) + if (headerParts.length < 2 || authParts.length < 2) { + return false; + } + + // Get organizational domain (last two parts) + const headerOrgDomain = headerParts.slice(-2).join('.'); + const authOrgDomain = authParts.slice(-2).join('.'); + + return headerOrgDomain === authOrgDomain; + } + + /** + * Extract domain from an email address + * @param email Email address + * @returns Domain part of the email + */ + private getDomainFromEmail(email: string): string { + if (!email) return ''; + + // Handle name + email format: "John Doe " + const matches = email.match(/<([^>]+)>/); + const address = matches ? matches[1] : email; + + const parts = address.split('@'); + return parts.length > 1 ? parts[1] : ''; + } + + /** + * Check if DMARC verification should be applied based on percentage + * @param record DMARC record + * @returns Whether DMARC verification should be applied + */ + private shouldApplyDmarc(record: DmarcRecord): boolean { + if (record.pct === undefined || record.pct === 100) { + return true; + } + + // Apply DMARC randomly based on percentage + const random = Math.floor(Math.random() * 100) + 1; + return random <= record.pct; + } + + /** + * Determine the action to take based on DMARC policy + * @param policy DMARC policy + * @returns Action to take + */ + private determineAction(policy: DmarcPolicy): 'pass' | 'quarantine' | 'reject' { + switch (policy) { + case DmarcPolicy.REJECT: + return 'reject'; + case DmarcPolicy.QUARANTINE: + return 'quarantine'; + case DmarcPolicy.NONE: + default: + return 'pass'; + } + } + + /** + * Verify DMARC for an incoming email + * @param email Email to verify + * @param spfResult SPF verification result + * @param dkimResult DKIM verification result + * @returns DMARC verification result + */ + public async verify( + email: Email, + spfResult: { domain: string; result: boolean }, + dkimResult: { domain: string; result: boolean } + ): Promise { + const securityLogger = SecurityLogger.getInstance(); + + // Initialize result + const result: DmarcResult = { + hasDmarc: false, + spfDomainAligned: false, + dkimDomainAligned: false, + spfPassed: spfResult.result, + dkimPassed: dkimResult.result, + policyEvaluated: DmarcPolicy.NONE, + actualPolicy: DmarcPolicy.NONE, + appliedPercentage: 100, + action: 'pass', + details: 'DMARC not configured' + }; + + try { + // Extract From domain + const fromHeader = email.getFromEmail(); + const fromDomain = this.getDomainFromEmail(fromHeader); + + if (!fromDomain) { + result.error = 'Invalid From domain'; + return result; + } + + // Check alignment + result.spfDomainAligned = this.isDomainAligned( + fromDomain, + spfResult.domain, + DmarcAlignment.RELAXED + ); + + result.dkimDomainAligned = this.isDomainAligned( + fromDomain, + dkimResult.domain, + DmarcAlignment.RELAXED + ); + + // Lookup DMARC record + const dmarcVerificationResult = await this.mtaRef.dnsManager.verifyDmarcRecord(fromDomain); + + // If DMARC record exists and is valid + if (dmarcVerificationResult.found && dmarcVerificationResult.valid) { + result.hasDmarc = true; + + // Parse DMARC record + const parsedRecord = this.parseDmarcRecord(dmarcVerificationResult.value); + + if (parsedRecord) { + result.record = parsedRecord; + result.actualPolicy = parsedRecord.policy; + result.appliedPercentage = parsedRecord.pct || 100; + + // Override alignment modes if specified in record + if (parsedRecord.adkim) { + result.dkimDomainAligned = this.isDomainAligned( + fromDomain, + dkimResult.domain, + parsedRecord.adkim + ); + } + + if (parsedRecord.aspf) { + result.spfDomainAligned = this.isDomainAligned( + fromDomain, + spfResult.domain, + parsedRecord.aspf + ); + } + + // Determine DMARC compliance + const spfAligned = result.spfPassed && result.spfDomainAligned; + const dkimAligned = result.dkimPassed && result.dkimDomainAligned; + + // Email passes DMARC if either SPF or DKIM passes with alignment + const dmarcPass = spfAligned || dkimAligned; + + // Use record percentage to determine if policy should be applied + const applyPolicy = this.shouldApplyDmarc(parsedRecord); + + if (!dmarcPass) { + // DMARC failed, apply policy + result.policyEvaluated = applyPolicy ? parsedRecord.policy : DmarcPolicy.NONE; + result.action = this.determineAction(result.policyEvaluated); + result.details = `DMARC failed: SPF aligned=${spfAligned}, DKIM aligned=${dkimAligned}, policy=${result.policyEvaluated}`; + } else { + result.policyEvaluated = DmarcPolicy.NONE; + result.action = 'pass'; + result.details = `DMARC passed: SPF aligned=${spfAligned}, DKIM aligned=${dkimAligned}`; + } + } else { + result.error = 'Invalid DMARC record format'; + result.details = 'DMARC record invalid'; + } + } else { + // No DMARC record found or invalid + result.details = dmarcVerificationResult.error || 'No DMARC record found'; + } + + // Log the DMARC verification + securityLogger.logEvent({ + level: result.action === 'pass' ? SecurityLogLevel.INFO : SecurityLogLevel.WARN, + type: SecurityEventType.DMARC, + message: result.details, + domain: fromDomain, + details: { + fromDomain, + spfDomain: spfResult.domain, + dkimDomain: dkimResult.domain, + spfPassed: result.spfPassed, + dkimPassed: result.dkimPassed, + spfAligned: result.spfDomainAligned, + dkimAligned: result.dkimDomainAligned, + dmarcPolicy: result.policyEvaluated, + action: result.action + }, + success: result.action === 'pass' + }); + + return result; + } catch (error) { + logger.log('error', `Error verifying DMARC: ${error.message}`, { + error: error.message, + emailId: email.getMessageId() + }); + + result.error = `DMARC verification error: ${error.message}`; + + // Log error + securityLogger.logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.DMARC, + message: `DMARC verification failed with error`, + details: { + error: error.message, + emailId: email.getMessageId() + }, + success: false + }); + + return result; + } + } + + /** + * Apply DMARC policy to an email + * @param email Email to apply policy to + * @param dmarcResult DMARC verification result + * @returns Whether the email should be accepted + */ + public applyPolicy(email: Email, dmarcResult: DmarcResult): boolean { + // Apply action based on DMARC verification result + switch (dmarcResult.action) { + case 'reject': + // Reject the email + email.mightBeSpam = true; + logger.log('warn', `Email rejected due to DMARC policy: ${dmarcResult.details}`, { + emailId: email.getMessageId(), + from: email.getFromEmail(), + subject: email.subject + }); + return false; + + case 'quarantine': + // Quarantine the email (mark as spam) + email.mightBeSpam = true; + + // Add spam header + if (!email.headers['X-Spam-Flag']) { + email.headers['X-Spam-Flag'] = 'YES'; + } + + // Add DMARC reason header + email.headers['X-DMARC-Result'] = dmarcResult.details; + + logger.log('warn', `Email quarantined due to DMARC policy: ${dmarcResult.details}`, { + emailId: email.getMessageId(), + from: email.getFromEmail(), + subject: email.subject + }); + return true; + + case 'pass': + default: + // Accept the email + // Add DMARC result header for information + email.headers['X-DMARC-Result'] = dmarcResult.details; + return true; + } + } + + /** + * End-to-end DMARC verification and policy application + * This method should be called after SPF and DKIM verification + * @param email Email to verify + * @param spfResult SPF verification result + * @param dkimResult DKIM verification result + * @returns Whether the email should be accepted + */ + public async verifyAndApply( + email: Email, + spfResult: { domain: string; result: boolean }, + dkimResult: { domain: string; result: boolean } + ): Promise { + // Verify DMARC + const dmarcResult = await this.verify(email, spfResult, dkimResult); + + // Apply DMARC policy + return this.applyPolicy(email, dmarcResult); + } +} \ No newline at end of file diff --git a/ts/mta/classes.email.ts b/ts/mta/classes.email.ts index 3ca539e..a1f969e 100644 --- a/ts/mta/classes.email.ts +++ b/ts/mta/classes.email.ts @@ -38,6 +38,8 @@ export class Email { mightBeSpam: boolean; priority: 'high' | 'normal' | 'low'; variables: Record; + private envelopeFrom: string; + private messageId: string; // Static validator instance for reuse private static emailValidator: EmailValidator; @@ -89,6 +91,12 @@ export class Email { // Set template variables this.variables = options.variables || {}; + + // Initialize envelope from (defaults to the from address) + this.envelopeFrom = this.from; + + // Generate message ID if not provided + this.messageId = `<${Date.now()}.${Math.random().toString(36).substring(2, 15)}@${this.getFromDomain() || 'localhost'}>`; } /** @@ -468,6 +476,53 @@ export class Email { return smartmail; } + /** + * Get the from email address + * @returns The from email address + */ + public getFromEmail(): string { + return this.from; + } + + /** + * Get the message ID + * @returns The message ID + */ + public getMessageId(): string { + return this.messageId; + } + + /** + * Set a custom message ID + * @param id The message ID to set + * @returns This instance for method chaining + */ + public setMessageId(id: string): this { + this.messageId = id; + return this; + } + + /** + * Get the envelope from address (return-path) + * @returns The envelope from address + */ + public getEnvelopeFrom(): string { + return this.envelopeFrom; + } + + /** + * Set the envelope from address (return-path) + * @param address The envelope from address to set + * @returns This instance for method chaining + */ + public setEnvelopeFrom(address: string): this { + if (!this.isValidEmail(address)) { + throw new Error(`Invalid envelope from address: ${address}`); + } + this.envelopeFrom = address; + return this; + } + /** * Creates an RFC822 compliant email string * @param variables Optional template variables to apply @@ -491,6 +546,8 @@ export class Email { result += `Subject: ${processedSubject}\r\n`; result += `Date: ${new Date().toUTCString()}\r\n`; + result += `Message-ID: ${this.messageId}\r\n`; + result += `Return-Path: <${this.envelopeFrom}>\r\n`; // Add custom headers for (const [key, value] of Object.entries(this.headers)) { diff --git a/ts/mta/classes.emailsendjob.ts b/ts/mta/classes.emailsendjob.ts index 2216ac1..827c527 100644 --- a/ts/mta/classes.emailsendjob.ts +++ b/ts/mta/classes.emailsendjob.ts @@ -160,6 +160,9 @@ export class EmailSendJob { this.deliveryInfo.deliveryTime = new Date(); this.log(`Email delivered successfully to ${currentMx}`); + // Record delivery for sender reputation monitoring + this.recordDeliveryEvent('delivered'); + // Save successful email record await this.saveSuccess(); return DeliveryStatus.DELIVERED; @@ -262,7 +265,35 @@ export class EmailSendJob { this.log(`Connecting to ${mxServer}:25`); setCommandTimeout(); - this.socket = plugins.net.connect(25, mxServer); + // Check if IP warmup is enabled and get an IP to use + let localAddress: string | undefined = undefined; + if (this.mtaRef.config.outbound?.warmup?.enabled) { + const warmupManager = this.mtaRef.getIPWarmupManager(); + if (warmupManager) { + const fromDomain = this.email.getFromDomain(); + const bestIP = warmupManager.getBestIPForSending({ + from: this.email.from, + to: this.email.getAllRecipients(), + domain: fromDomain, + isTransactional: this.email.priority === 'high' + }); + + if (bestIP) { + this.log(`Using warmed-up IP ${bestIP} for sending`); + localAddress = bestIP; + + // Record the send for warm-up tracking + warmupManager.recordSend(bestIP); + } + } + } + + // Connect with specified local address if available + this.socket = plugins.net.connect({ + port: 25, + host: mxServer, + localAddress + }); this.socket.on('error', (err) => { this.log(`Socket error: ${err.message}`); @@ -461,6 +492,54 @@ export class EmailSendJob { return message; } + /** + * Record an event for sender reputation monitoring + * @param eventType Type of event + * @param isHardBounce Whether the event is a hard bounce (for bounce events) + */ + private recordDeliveryEvent( + eventType: 'sent' | 'delivered' | 'bounce' | 'complaint', + isHardBounce: boolean = false + ): void { + try { + // Check if reputation monitoring is enabled + if (!this.mtaRef.config.outbound?.reputation?.enabled) { + return; + } + + const reputationMonitor = this.mtaRef.getReputationMonitor(); + if (!reputationMonitor) { + return; + } + + // Get domain from sender + const domain = this.email.getFromDomain(); + if (!domain) { + return; + } + + // Determine receiving domain for complaint tracking + let receivingDomain = null; + if (eventType === 'complaint' && this.email.to.length > 0) { + const recipient = this.email.to[0]; + const parts = recipient.split('@'); + if (parts.length === 2) { + receivingDomain = parts[1]; + } + } + + // Record the event + reputationMonitor.recordSendEvent(domain, { + type: eventType, + count: 1, + hardBounce: isHardBounce, + receivingDomain + }); + } catch (error) { + this.log(`Error recording delivery event: ${error.message}`); + } + } + /** * Send a command to the SMTP server and wait for the expected response */ diff --git a/ts/mta/classes.mta.ts b/ts/mta/classes.mta.ts index 3f1db63..5a88c25 100644 --- a/ts/mta/classes.mta.ts +++ b/ts/mta/classes.mta.ts @@ -5,9 +5,15 @@ import { Email } from './classes.email.js'; import { EmailSendJob, DeliveryStatus } from './classes.emailsendjob.js'; import { DKIMCreator } from './classes.dkimcreator.js'; import { DKIMVerifier } from './classes.dkimverifier.js'; +import { SpfVerifier } from './classes.spfverifier.js'; +import { DmarcVerifier } from './classes.dmarcverifier.js'; import { SMTPServer, type ISmtpServerOptions } from './classes.smtpserver.js'; import { DNSManager } from './classes.dnsmanager.js'; import { ApiManager } from './classes.apimanager.js'; +import { RateLimiter, type IRateLimitConfig } from './classes.ratelimiter.js'; +import { ContentScanner } from '../security/classes.contentscanner.js'; +import { IPWarmupManager } from '../deliverability/classes.ipwarmupmanager.js'; +import { SenderReputationMonitor } from '../deliverability/classes.senderreputationmonitor.js'; import type { SzPlatformService } from '../platformservice.js'; /** @@ -57,6 +63,33 @@ export interface IMtaConfig { /** Whether to apply per domain (vs globally) */ perDomain?: boolean; }; + /** IP warmup configuration */ + warmup?: { + /** Whether IP warmup is enabled */ + enabled?: boolean; + /** IP addresses to warm up */ + ipAddresses?: string[]; + /** Target domains to warm up */ + targetDomains?: string[]; + /** Allocation policy to use */ + allocationPolicy?: string; + /** Fallback percentage for ESP routing during warmup */ + fallbackPercentage?: number; + }; + /** Reputation monitoring configuration */ + reputation?: { + /** Whether reputation monitoring is enabled */ + enabled?: boolean; + /** How frequently to update metrics (ms) */ + updateFrequency?: number; + /** Alert thresholds */ + alertThresholds?: { + /** Minimum acceptable reputation score */ + minReputationScore?: number; + /** Maximum acceptable complaint rate */ + maxComplaintRate?: number; + }; + }; }; /** Security settings */ security?: { @@ -66,10 +99,26 @@ export interface IMtaConfig { verifyDkim?: boolean; /** Whether to verify SPF on inbound */ verifySpf?: boolean; + /** Whether to verify DMARC on inbound */ + verifyDmarc?: boolean; + /** Whether to enforce DMARC policy */ + enforceDmarc?: boolean; /** Whether to use TLS for outbound when available */ useTls?: boolean; /** Whether to require valid certificates */ requireValidCerts?: boolean; + /** Log level for email security events */ + securityLogLevel?: 'info' | 'warn' | 'error'; + /** Whether to check IP reputation for inbound emails */ + checkIPReputation?: boolean; + /** Whether to scan content for malicious payloads */ + scanContent?: boolean; + /** Action to take when malicious content is detected */ + maliciousContentAction?: 'tag' | 'quarantine' | 'reject'; + /** Minimum threat score to trigger action */ + threatScoreThreshold?: number; + /** Whether to reject connections from high-risk IPs */ + rejectHighRiskIPs?: boolean; }; /** Domains configuration */ domains?: { @@ -121,6 +170,18 @@ interface MtaStats { expiresAt: Date; daysUntilExpiry: number; }; + warmupInfo?: { + enabled: boolean; + activeIPs: number; + inWarmupPhase: number; + completedWarmup: number; + }; + reputationInfo?: { + enabled: boolean; + monitoredDomains: number; + averageScore: number; + domainsWithIssues: number; + }; } /** @@ -130,6 +191,11 @@ export class MtaService { /** Reference to the platform service */ public platformServiceRef: SzPlatformService; + // Get access to the email service and bounce manager + private get emailService() { + return this.platformServiceRef.emailService; + } + /** SMTP server instance */ public server: SMTPServer; @@ -139,6 +205,12 @@ export class MtaService { /** DKIM verifier for validating incoming emails */ public dkimVerifier: DKIMVerifier; + /** SPF verifier for validating incoming emails */ + public spfVerifier: SpfVerifier; + + /** DMARC verifier for email authentication policy enforcement */ + public dmarcVerifier: DmarcVerifier; + /** DNS manager for handling DNS records */ public dnsManager: DNSManager; @@ -151,17 +223,20 @@ export class MtaService { /** Email queue processing state */ private queueProcessing = false; - /** Rate limiters for outbound emails */ - private rateLimiters: Map = new Map(); + /** Rate limiter for outbound emails */ + private rateLimiter: RateLimiter; + + /** IP warmup manager for controlled scaling of new IPs */ + private ipWarmupManager: IPWarmupManager; + + /** Sender reputation monitor for tracking domain reputation */ + private reputationMonitor: SenderReputationMonitor; /** Certificate cache */ private certificate: Certificate = null; /** MTA configuration */ - private config: IMtaConfig; + public config: IMtaConfig; /** Stats for monitoring */ private stats: MtaStats; @@ -191,9 +266,46 @@ export class MtaService { this.dkimVerifier = new DKIMVerifier(this); this.dnsManager = new DNSManager(this); this.apiManager = new ApiManager(); + + // Initialize authentication verifiers + this.spfVerifier = new SpfVerifier(this); + this.dmarcVerifier = new DmarcVerifier(this); + // Initialize SMTP rule engine this.smtpRuleEngine = new plugins.smartrule.SmartRule(); + // Initialize rate limiter with config + const rateLimitConfig = this.config.outbound?.rateLimit; + this.rateLimiter = new RateLimiter({ + maxPerPeriod: rateLimitConfig?.maxPerPeriod || 100, + periodMs: rateLimitConfig?.periodMs || 60000, + perKey: rateLimitConfig?.perDomain || true, + burstTokens: 5 // Allow small bursts + }); + + // Initialize IP warmup manager + const warmupConfig = this.config.outbound?.warmup; + this.ipWarmupManager = IPWarmupManager.getInstance({ + enabled: warmupConfig?.enabled || false, + ipAddresses: warmupConfig?.ipAddresses || [], + targetDomains: warmupConfig?.targetDomains || [], + fallbackPercentage: warmupConfig?.fallbackPercentage || 50 + }); + + // Set active allocation policy if specified + if (warmupConfig?.allocationPolicy) { + this.ipWarmupManager.setActiveAllocationPolicy(warmupConfig.allocationPolicy); + } + + // Initialize sender reputation monitor + const reputationConfig = this.config.outbound?.reputation; + this.reputationMonitor = SenderReputationMonitor.getInstance({ + enabled: reputationConfig?.enabled || false, + domains: this.config.domains?.local || [], + updateFrequency: reputationConfig?.updateFrequency || 24 * 60 * 60 * 1000, + alertThresholds: reputationConfig?.alertThresholds || {} + }); + // Initialize stats this.stats = { startTime: new Date(), @@ -234,14 +346,37 @@ export class MtaService { maxPerPeriod: 100, periodMs: 60000, // 1 minute perDomain: true + }, + warmup: { + enabled: false, + ipAddresses: [], + targetDomains: [], + allocationPolicy: 'balanced', + fallbackPercentage: 50 + }, + reputation: { + enabled: false, + updateFrequency: 24 * 60 * 60 * 1000, // Daily + alertThresholds: { + minReputationScore: 70, + maxComplaintRate: 0.1 // 0.1% + } } }, security: { useDkim: true, verifyDkim: true, verifySpf: true, + verifyDmarc: true, + enforceDmarc: true, useTls: true, - requireValidCerts: false + requireValidCerts: false, + securityLogLevel: 'warn', + checkIPReputation: true, + scanContent: true, + maliciousContentAction: 'tag', + threatScoreThreshold: 50, + rejectHighRiskIPs: false }, domains: { local: ['lossless.one'], @@ -393,6 +528,14 @@ export class MtaService { // Update stats this.stats.queueSize = this.emailQueue.size; + // Record 'sent' event for sender reputation monitoring + if (this.config.outbound?.reputation?.enabled) { + const fromDomain = email.getFromDomain(); + if (fromDomain) { + this.reputationMonitor.recordSendEvent(fromDomain, { type: 'sent' }); + } + } + console.log(`Email added to queue: ${id}`); return id; @@ -413,18 +556,62 @@ export class MtaService { throw new Error('MTA service is not running'); } - // Apply SMTP rule engine decisions - try { - await this.smtpRuleEngine.makeDecision(email); - } catch (err) { - console.error('Error executing SMTP rules:', err); - } try { console.log(`Processing incoming email from ${email.from} to ${email.to}`); // Update stats this.stats.emailsReceived++; + // Apply SMTP rule engine decisions + try { + await this.smtpRuleEngine.makeDecision(email); + } catch (err) { + console.error('Error executing SMTP rules:', err); + } + + // Scan for malicious content if enabled + if (this.config.security?.scanContent !== false) { + const contentScanner = ContentScanner.getInstance(); + const scanResult = await contentScanner.scanEmail(email); + + // Log the scan result + console.log(`Content scan result for email ${email.getMessageId()}: score=${scanResult.threatScore}, isClean=${scanResult.isClean}`); + + // Take action based on the scan result and configuration + if (!scanResult.isClean) { + const threatScoreThreshold = this.config.security?.threatScoreThreshold || 50; + + // Check if the threat score exceeds the threshold + if (scanResult.threatScore >= threatScoreThreshold) { + const action = this.config.security?.maliciousContentAction || 'tag'; + + switch (action) { + case 'reject': + // Reject the email + console.log(`Rejecting email from ${email.from} due to malicious content: ${scanResult.threatType} (score: ${scanResult.threatScore})`); + return false; + + case 'quarantine': + // Save to quarantine folder instead of regular processing + await this.saveToQuarantine(email, scanResult); + return true; + + case 'tag': + default: + // Tag the email by modifying subject and adding headers + email.subject = `[SUSPICIOUS] ${email.subject}`; + email.addHeader('X-Content-Scanned', 'True'); + email.addHeader('X-Threat-Type', scanResult.threatType || 'unknown'); + email.addHeader('X-Threat-Score', scanResult.threatScore.toString()); + email.addHeader('X-Threat-Details', scanResult.threatDetails || 'Suspicious content detected'); + email.mightBeSpam = true; + console.log(`Tagged email from ${email.from} with suspicious content: ${scanResult.threatType} (score: ${scanResult.threatScore})`); + break; + } + } + } + } + // Check if the recipient domain is local const recipientDomain = email.to[0].split('@')[1]; const isLocalDomain = this.isLocalDomain(recipientDomain); @@ -444,6 +631,55 @@ export class MtaService { return false; } } + + /** + * Save a suspicious email to quarantine + * @param email The email to quarantine + * @param scanResult The scan result + */ + private async saveToQuarantine(email: Email, scanResult: any): Promise { + try { + // Create quarantine directory if it doesn't exist + const quarantinePath = plugins.path.join(paths.dataDir, 'emails', 'quarantine'); + plugins.smartfile.fs.ensureDirSync(quarantinePath); + + // Generate a filename with timestamp and details + const timestamp = Date.now(); + const safeFrom = email.from.replace(/[^a-zA-Z0-9]/g, '_'); + const filename = `${timestamp}_${safeFrom}_${scanResult.threatScore}.eml`; + + // Save the email + const emailContent = email.toRFC822String(); + const filePath = plugins.path.join(quarantinePath, filename); + + plugins.smartfile.memory.toFsSync(emailContent, filePath); + + // Save scan metadata alongside the email + const metadataPath = plugins.path.join(quarantinePath, `${filename}.meta.json`); + const metadata = { + timestamp, + from: email.from, + to: email.to, + subject: email.subject, + messageId: email.getMessageId(), + scanResult: { + threatType: scanResult.threatType, + threatDetails: scanResult.threatDetails, + threatScore: scanResult.threatScore, + scannedElements: scanResult.scannedElements + } + }; + + plugins.smartfile.memory.toFsSync( + JSON.stringify(metadata, null, 2), + metadataPath + ); + + console.log(`Email quarantined: ${filePath}`); + } catch (error) { + console.error('Error saving email to quarantine:', error); + } + } /** * Check if a domain is local @@ -456,6 +692,14 @@ export class MtaService { * Save an email to a local mailbox */ private async saveToLocalMailbox(email: Email): Promise { + // Check if this is a bounce notification + const isBounceNotification = this.isBounceNotification(email); + + if (isBounceNotification) { + await this.processBounceNotification(email); + return; + } + // Simplified implementation - in a real system, this would store to a user's mailbox const mailboxPath = plugins.path.join(paths.receivedEmailsDir, 'local'); plugins.smartfile.fs.ensureDirSync(mailboxPath); @@ -470,6 +714,77 @@ export class MtaService { console.log(`Email saved to local mailbox: ${filename}`); } + + /** + * Check if an email is a bounce notification + */ + private isBounceNotification(email: Email): boolean { + // Check subject for bounce-related keywords + const subject = email.subject?.toLowerCase() || ''; + if ( + subject.includes('mail delivery') || + subject.includes('delivery failed') || + subject.includes('undeliverable') || + subject.includes('delivery status') || + subject.includes('failure notice') || + subject.includes('returned mail') || + subject.includes('delivery problem') + ) { + return true; + } + + // Check sender address for common bounced email addresses + const from = email.from.toLowerCase(); + if ( + from.includes('mailer-daemon') || + from.includes('postmaster') || + from.includes('mail-delivery') || + from.includes('bounces') + ) { + return true; + } + + return false; + } + + /** + * Process a bounce notification + */ + private async processBounceNotification(email: Email): Promise { + try { + console.log(`Processing bounce notification from ${email.from}`); + + // Convert to Smartmail for bounce processing + const smartmail = await email.toSmartmail(); + + // If we have a bounce manager available, process it + if (this.emailService?.bounceManager) { + const bounceResult = await this.emailService.bounceManager.processBounceEmail(smartmail); + + if (bounceResult) { + console.log(`Processed bounce for recipient: ${bounceResult.recipient}, type: ${bounceResult.bounceType}`); + } else { + console.log('Could not extract bounce information from email'); + } + } else { + console.log('Bounce manager not available, saving bounce notification for later processing'); + + // Save to bounces directory for later processing + const bouncesPath = plugins.path.join(paths.dataDir, 'emails', 'bounces'); + plugins.smartfile.fs.ensureDirSync(bouncesPath); + + const emailContent = email.toRFC822String(); + const filename = `${Date.now()}_bounce.eml`; + + plugins.smartfile.memory.toFsSync( + emailContent, + plugins.path.join(bouncesPath, filename) + ); + } + } catch (error) { + console.error('Error processing bounce notification:', error); + } + } /** * Start processing the email queue @@ -572,6 +887,17 @@ export class MtaService { this.stats.emailsFailed++; console.log(`Email ${entry.id} failed permanently: ${entry.error.message}`); + // Record bounce event for reputation monitoring + if (this.config.outbound?.reputation?.enabled) { + const domain = entry.email.getFromDomain(); + if (domain) { + this.reputationMonitor.recordSendEvent(domain, { + type: 'bounce', + hardBounce: true + }); + } + } + // Remove from queue this.emailQueue.delete(entry.id); } else if (status === DeliveryStatus.DEFERRED) { @@ -587,6 +913,17 @@ export class MtaService { // Remove from queue this.emailQueue.delete(entry.id); } else { + // Record soft bounce for reputation monitoring + if (this.config.outbound?.reputation?.enabled) { + const domain = entry.email.getFromDomain(); + if (domain) { + this.reputationMonitor.recordSendEvent(domain, { + type: 'bounce', + hardBounce: false + }); + } + } + // Schedule retry const delay = this.calculateRetryDelay(entry.attempts); entry.nextAttempt = new Date(Date.now() + delay); @@ -602,9 +939,33 @@ export class MtaService { if (entry.attempts >= this.config.outbound.retries.max) { entry.status = DeliveryStatus.FAILED; this.stats.emailsFailed++; + + // Record bounce event for reputation monitoring after max retries + if (this.config.outbound?.reputation?.enabled) { + const domain = entry.email.getFromDomain(); + if (domain) { + this.reputationMonitor.recordSendEvent(domain, { + type: 'bounce', + hardBounce: true + }); + } + } + this.emailQueue.delete(entry.id); } else { entry.status = DeliveryStatus.DEFERRED; + + // Record soft bounce for reputation monitoring + if (this.config.outbound?.reputation?.enabled) { + const domain = entry.email.getFromDomain(); + if (domain) { + this.reputationMonitor.recordSendEvent(domain, { + type: 'bounce', + hardBounce: false + }); + } + } + const delay = this.calculateRetryDelay(entry.attempts); entry.nextAttempt = new Date(Date.now() + delay); } @@ -635,42 +996,11 @@ export class MtaService { * Check if an email can be sent under rate limits */ private checkRateLimit(email: Email): boolean { - const config = this.config.outbound.rateLimit; - if (!config || !config.maxPerPeriod) { - return true; // No rate limit configured - } + // Get the appropriate domain key + const domainKey = email.getFromDomain(); - // Determine which limiter to use - const key = config.perDomain ? email.getFromDomain() : 'global'; - - // Initialize limiter if needed - if (!this.rateLimiters.has(key)) { - this.rateLimiters.set(key, { - tokens: config.maxPerPeriod, - lastRefill: Date.now() - }); - } - - const limiter = this.rateLimiters.get(key); - - // Refill tokens based on time elapsed - const now = Date.now(); - const elapsedMs = now - limiter.lastRefill; - const tokensToAdd = Math.floor(elapsedMs / config.periodMs) * config.maxPerPeriod; - - if (tokensToAdd > 0) { - limiter.tokens = Math.min(config.maxPerPeriod, limiter.tokens + tokensToAdd); - limiter.lastRefill = now - (elapsedMs % config.periodMs); - } - - // Check if we have tokens available - if (limiter.tokens > 0) { - limiter.tokens--; - return true; - } else { - console.log(`Rate limit exceeded for ${key}`); - return false; - } + // Check if sending is allowed under rate limits + return this.rateLimiter.consume(domainKey); } /** @@ -974,10 +1304,24 @@ export class MtaService { } } + /** + * Get the IP warmup manager + */ + public getIPWarmupManager(): IPWarmupManager { + return this.ipWarmupManager; + } + + /** + * Get the sender reputation monitor + */ + public getReputationMonitor(): SenderReputationMonitor { + return this.reputationMonitor; + } + /** * Get MTA service statistics */ - public getStats(): MtaStats { + public getStats(): MtaStats & { rateLimiting?: any } { // Update queue size this.stats.queueSize = this.emailQueue.size; @@ -995,6 +1339,80 @@ export class MtaService { }; } - return { ...this.stats }; + // Add rate limiting stats + const statsWithRateLimiting = { + ...this.stats, + rateLimiting: { + global: this.rateLimiter.getStats('global') + } + }; + + // Add warmup information if enabled + if (this.config.outbound?.warmup?.enabled) { + const warmupStatuses = this.ipWarmupManager.getWarmupStatus() as Map; + + let activeIPs = 0; + let inWarmupPhase = 0; + let completedWarmup = 0; + + warmupStatuses.forEach(status => { + activeIPs++; + if (status.isActive) { + if (status.currentStage < this.ipWarmupManager.getStageCount()) { + inWarmupPhase++; + } else { + completedWarmup++; + } + } + }); + + statsWithRateLimiting.warmupInfo = { + enabled: true, + activeIPs, + inWarmupPhase, + completedWarmup + }; + } else { + statsWithRateLimiting.warmupInfo = { + enabled: false, + activeIPs: 0, + inWarmupPhase: 0, + completedWarmup: 0 + }; + } + + // Add reputation metrics if enabled + if (this.config.outbound?.reputation?.enabled) { + const reputationSummary = this.reputationMonitor.getReputationSummary(); + + // Calculate average reputation score + const avgScore = reputationSummary.length > 0 + ? reputationSummary.reduce((sum, domain) => sum + domain.score, 0) / reputationSummary.length + : 0; + + // Count domains with issues + const domainsWithIssues = reputationSummary.filter( + domain => domain.status === 'poor' || domain.status === 'critical' || domain.listed + ).length; + + statsWithRateLimiting.reputationInfo = { + enabled: true, + monitoredDomains: reputationSummary.length, + averageScore: avgScore, + domainsWithIssues + }; + } else { + statsWithRateLimiting.reputationInfo = { + enabled: false, + monitoredDomains: 0, + averageScore: 0, + domainsWithIssues: 0 + }; + } + + // Clean up old rate limiter buckets to prevent memory leaks + this.rateLimiter.cleanup(); + + return statsWithRateLimiting; } } \ No newline at end of file diff --git a/ts/mta/classes.ratelimiter.ts b/ts/mta/classes.ratelimiter.ts new file mode 100644 index 0000000..9bf22e8 --- /dev/null +++ b/ts/mta/classes.ratelimiter.ts @@ -0,0 +1,281 @@ +import { logger } from '../logger.js'; + +/** + * Configuration options for rate limiter + */ +export interface IRateLimitConfig { + /** Maximum tokens per period */ + maxPerPeriod: number; + + /** Time period in milliseconds */ + periodMs: number; + + /** Whether to apply per domain/key (vs globally) */ + perKey: boolean; + + /** Initial token count (defaults to max) */ + initialTokens?: number; + + /** Grace tokens to allow occasional bursts */ + burstTokens?: number; + + /** Apply global limit in addition to per-key limits */ + useGlobalLimit?: boolean; +} + +/** + * Token bucket for an individual key + */ +interface TokenBucket { + /** Current number of tokens */ + tokens: number; + + /** Last time tokens were refilled */ + lastRefill: number; + + /** Total allowed requests */ + allowed: number; + + /** Total denied requests */ + denied: number; +} + +/** + * Rate limiter using token bucket algorithm + * Provides more sophisticated rate limiting with burst handling + */ +export class RateLimiter { + /** Rate limit configuration */ + private config: IRateLimitConfig; + + /** Token buckets per key */ + private buckets: Map = new Map(); + + /** Global bucket for non-keyed rate limiting */ + private globalBucket: TokenBucket; + + /** + * Create a new rate limiter + * @param config Rate limiter configuration + */ + constructor(config: IRateLimitConfig) { + // Set defaults + this.config = { + maxPerPeriod: config.maxPerPeriod, + periodMs: config.periodMs, + perKey: config.perKey ?? true, + initialTokens: config.initialTokens ?? config.maxPerPeriod, + burstTokens: config.burstTokens ?? 0, + useGlobalLimit: config.useGlobalLimit ?? false + }; + + // Initialize global bucket + this.globalBucket = { + tokens: this.config.initialTokens, + lastRefill: Date.now(), + allowed: 0, + denied: 0 + }; + + // Log initialization + logger.log('info', `Rate limiter initialized: ${this.config.maxPerPeriod} per ${this.config.periodMs}ms${this.config.perKey ? ' per key' : ''}`); + } + + /** + * Check if a request is allowed under rate limits + * @param key Key to check rate limit for (e.g. domain, user, IP) + * @param cost Token cost (defaults to 1) + * @returns Whether the request is allowed + */ + public isAllowed(key: string = 'global', cost: number = 1): boolean { + // If using global bucket directly, just check that + if (key === 'global' || !this.config.perKey) { + return this.checkBucket(this.globalBucket, cost); + } + + // Get the key-specific bucket + const bucket = this.getBucket(key); + + // If we also need to check global limit + if (this.config.useGlobalLimit) { + // Both key bucket and global bucket must have tokens + return this.checkBucket(bucket, cost) && this.checkBucket(this.globalBucket, cost); + } else { + // Only need to check the key-specific bucket + return this.checkBucket(bucket, cost); + } + } + + /** + * Check if a bucket has enough tokens and consume them + * @param bucket The token bucket to check + * @param cost Token cost + * @returns Whether tokens were consumed + */ + private checkBucket(bucket: TokenBucket, cost: number): boolean { + // Refill tokens based on elapsed time + this.refillBucket(bucket); + + // Check if we have enough tokens + if (bucket.tokens >= cost) { + // Use tokens + bucket.tokens -= cost; + bucket.allowed++; + return true; + } else { + // Rate limit exceeded + bucket.denied++; + return false; + } + } + + /** + * Consume tokens for a request (if available) + * @param key Key to consume tokens for + * @param cost Token cost (defaults to 1) + * @returns Whether tokens were consumed + */ + public consume(key: string = 'global', cost: number = 1): boolean { + const isAllowed = this.isAllowed(key, cost); + return isAllowed; + } + + /** + * Get the remaining tokens for a key + * @param key Key to check + * @returns Number of remaining tokens + */ + public getRemainingTokens(key: string = 'global'): number { + const bucket = this.getBucket(key); + this.refillBucket(bucket); + return bucket.tokens; + } + + /** + * Get stats for a specific key + * @param key Key to get stats for + * @returns Rate limit statistics + */ + public getStats(key: string = 'global'): { + remaining: number; + limit: number; + resetIn: number; + allowed: number; + denied: number; + } { + const bucket = this.getBucket(key); + this.refillBucket(bucket); + + // Calculate time until next token + const resetIn = bucket.tokens < this.config.maxPerPeriod ? + Math.ceil(this.config.periodMs / this.config.maxPerPeriod) : + 0; + + return { + remaining: bucket.tokens, + limit: this.config.maxPerPeriod, + resetIn, + allowed: bucket.allowed, + denied: bucket.denied + }; + } + + /** + * Get or create a token bucket for a key + * @param key The rate limit key + * @returns Token bucket + */ + private getBucket(key: string): TokenBucket { + if (!this.config.perKey || key === 'global') { + return this.globalBucket; + } + + if (!this.buckets.has(key)) { + // Create new bucket + this.buckets.set(key, { + tokens: this.config.initialTokens, + lastRefill: Date.now(), + allowed: 0, + denied: 0 + }); + } + + return this.buckets.get(key); + } + + /** + * Refill tokens in a bucket based on elapsed time + * @param bucket Token bucket to refill + */ + private refillBucket(bucket: TokenBucket): void { + const now = Date.now(); + const elapsedMs = now - bucket.lastRefill; + + // Calculate how many tokens to add + const rate = this.config.maxPerPeriod / this.config.periodMs; + const tokensToAdd = elapsedMs * rate; + + if (tokensToAdd >= 0.1) { // Allow for partial token refills + // Add tokens, but don't exceed the normal maximum (without burst) + // This ensures burst tokens are only used for bursts and don't refill + const normalMax = this.config.maxPerPeriod; + bucket.tokens = Math.min( + // Don't exceed max + burst + this.config.maxPerPeriod + (this.config.burstTokens || 0), + // Don't exceed normal max when refilling + Math.min(normalMax, bucket.tokens + tokensToAdd) + ); + + // Update last refill time + bucket.lastRefill = now; + } + } + + /** + * Reset rate limits for a specific key + * @param key Key to reset + */ + public reset(key: string = 'global'): void { + if (key === 'global' || !this.config.perKey) { + this.globalBucket.tokens = this.config.initialTokens; + this.globalBucket.lastRefill = Date.now(); + } else if (this.buckets.has(key)) { + const bucket = this.buckets.get(key); + bucket.tokens = this.config.initialTokens; + bucket.lastRefill = Date.now(); + } + } + + /** + * Reset all rate limiters + */ + public resetAll(): void { + this.globalBucket.tokens = this.config.initialTokens; + this.globalBucket.lastRefill = Date.now(); + + for (const bucket of this.buckets.values()) { + bucket.tokens = this.config.initialTokens; + bucket.lastRefill = Date.now(); + } + } + + /** + * Cleanup old buckets to prevent memory leaks + * @param maxAge Maximum age in milliseconds + */ + public cleanup(maxAge: number = 24 * 60 * 60 * 1000): void { + const now = Date.now(); + let removed = 0; + + for (const [key, bucket] of this.buckets.entries()) { + if (now - bucket.lastRefill > maxAge) { + this.buckets.delete(key); + removed++; + } + } + + if (removed > 0) { + logger.log('debug', `Cleaned up ${removed} stale rate limit buckets`); + } + } +} \ No newline at end of file diff --git a/ts/mta/classes.smtpserver.ts b/ts/mta/classes.smtpserver.ts index c4343e2..6403d7f 100644 --- a/ts/mta/classes.smtpserver.ts +++ b/ts/mta/classes.smtpserver.ts @@ -3,6 +3,13 @@ import * as paths from '../paths.js'; import { Email } from './classes.email.js'; import type { MtaService } from './classes.mta.js'; import { logger } from '../logger.js'; +import { + SecurityLogger, + SecurityLogLevel, + SecurityEventType, + IPReputationChecker, + ReputationThreshold +} from '../security/index.js'; export interface ISmtpServerOptions { port: number; @@ -53,8 +60,10 @@ export class SMTPServer { }); } - private handleNewConnection(socket: plugins.net.Socket): void { - console.log(`New connection from ${socket.remoteAddress}:${socket.remotePort}`); + private async handleNewConnection(socket: plugins.net.Socket): Promise { + const clientIp = socket.remoteAddress; + const clientPort = socket.remotePort; + console.log(`New connection from ${clientIp}:${clientPort}`); // Initialize a new session this.sessions.set(socket, { @@ -66,6 +75,68 @@ export class SMTPServer { useTLS: false, connectionEnded: false }); + + // Check IP reputation + try { + if (this.mtaRef.config.security?.checkIPReputation !== false && clientIp) { + const reputationChecker = IPReputationChecker.getInstance(); + const reputation = await reputationChecker.checkReputation(clientIp); + + // Log the reputation check + SecurityLogger.getInstance().logEvent({ + level: reputation.score < ReputationThreshold.HIGH_RISK + ? SecurityLogLevel.WARN + : SecurityLogLevel.INFO, + type: SecurityEventType.IP_REPUTATION, + message: `IP reputation checked for new SMTP connection: score=${reputation.score}`, + ipAddress: clientIp, + details: { + clientPort, + score: reputation.score, + isSpam: reputation.isSpam, + isProxy: reputation.isProxy, + isTor: reputation.isTor, + isVPN: reputation.isVPN, + country: reputation.country, + blacklists: reputation.blacklists, + socketId: socket.remotePort.toString() + socket.remoteFamily + } + }); + + // Handle high-risk IPs - add delay or reject based on score + if (reputation.score < ReputationThreshold.HIGH_RISK) { + // For high-risk connections, add an artificial delay to slow down potential spam + const delayMs = Math.min(5000, Math.max(1000, (ReputationThreshold.HIGH_RISK - reputation.score) * 100)); + await new Promise(resolve => setTimeout(resolve, delayMs)); + + if (reputation.score < 5) { + // Very high risk - can optionally reject the connection + if (this.mtaRef.config.security?.rejectHighRiskIPs) { + this.sendResponse(socket, `554 Transaction failed - IP is on spam blocklist`); + socket.destroy(); + return; + } + } + } + } + } catch (error) { + logger.log('error', `Error checking IP reputation: ${error.message}`, { + ip: clientIp, + error: error.message + }); + } + + // Log the connection as a security event + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.INFO, + type: SecurityEventType.CONNECTION, + message: `New SMTP connection established`, + ipAddress: clientIp, + details: { + clientPort, + socketId: socket.remotePort.toString() + socket.remoteFamily + } + }); // Send greeting this.sendResponse(socket, `220 ${this.hostname} ESMTP Service Ready`); @@ -75,21 +146,69 @@ export class SMTPServer { }); socket.on('end', () => { - console.log(`Connection ended from ${socket.remoteAddress}:${socket.remotePort}`); + const clientIp = socket.remoteAddress; + const clientPort = socket.remotePort; + console.log(`Connection ended from ${clientIp}:${clientPort}`); + const session = this.sessions.get(socket); if (session) { session.connectionEnded = true; + + // Log connection end as security event + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.INFO, + type: SecurityEventType.CONNECTION, + message: `SMTP connection ended normally`, + ipAddress: clientIp, + details: { + clientPort, + state: SmtpState[session.state], + from: session.mailFrom || 'not set' + } + }); } }); socket.on('error', (err) => { + const clientIp = socket.remoteAddress; + const clientPort = socket.remotePort; console.error(`Socket error: ${err.message}`); + + // Log connection error as security event + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.CONNECTION, + message: `SMTP connection error`, + ipAddress: clientIp, + details: { + clientPort, + error: err.message, + errorCode: (err as any).code, + from: this.sessions.get(socket)?.mailFrom || 'not set' + } + }); + this.sessions.delete(socket); socket.destroy(); }); socket.on('close', () => { - console.log(`Connection closed from ${socket.remoteAddress}:${socket.remotePort}`); + const clientIp = socket.remoteAddress; + const clientPort = socket.remotePort; + console.log(`Connection closed from ${clientIp}:${clientPort}`); + + // Log connection closure as security event + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.INFO, + type: SecurityEventType.CONNECTION, + message: `SMTP connection closed`, + ipAddress: clientIp, + details: { + clientPort, + sessionEnded: this.sessions.get(socket)?.connectionEnded || false + } + }); + this.sessions.delete(socket); }); } @@ -358,33 +477,165 @@ export class SMTPServer { // Prepare headers for DKIM verification results const customHeaders: Record = {}; - // Verifying the email with enhanced DKIM verification - try { - const verificationResult = await this.mtaRef.dkimVerifier.verify(session.emailData, { - useCache: true, - returnDetails: false - }); + // Authentication results + let dkimResult = { domain: '', result: false }; + let spfResult = { domain: '', result: false }; + + // Check security configuration + const securityConfig = this.mtaRef.config.security || {}; + + // 1. Verify DKIM signature if enabled + if (securityConfig.verifyDkim !== false) { + try { + const verificationResult = await this.mtaRef.dkimVerifier.verify(session.emailData, { + useCache: true, + returnDetails: false + }); - mightBeSpam = !verificationResult.isValid; - - if (!verificationResult.isValid) { - logger.log('warn', `DKIM verification failed for incoming email: ${verificationResult.errorMessage || 'Unknown error'}`); - } else { - logger.log('info', `DKIM verification passed for incoming email from domain ${verificationResult.domain}`); + dkimResult.result = verificationResult.isValid; + dkimResult.domain = verificationResult.domain || ''; + + if (!verificationResult.isValid) { + logger.log('warn', `DKIM verification failed for incoming email: ${verificationResult.errorMessage || 'Unknown error'}`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.DKIM, + message: `DKIM verification failed for incoming email`, + domain: verificationResult.domain || session.mailFrom.split('@')[1], + details: { + error: verificationResult.errorMessage || 'Unknown error', + status: verificationResult.status, + selector: verificationResult.selector, + senderIP: socket.remoteAddress + }, + ipAddress: socket.remoteAddress, + success: false + }); + } else { + logger.log('info', `DKIM verification passed for incoming email from domain ${verificationResult.domain}`); + + // Enhanced security logging + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.INFO, + type: SecurityEventType.DKIM, + message: `DKIM verification passed for incoming email`, + domain: verificationResult.domain, + details: { + selector: verificationResult.selector, + status: verificationResult.status, + senderIP: socket.remoteAddress + }, + ipAddress: socket.remoteAddress, + success: true + }); + } + + // Store verification results in headers + if (verificationResult.domain) { + customHeaders['X-DKIM-Domain'] = verificationResult.domain; + } + + customHeaders['X-DKIM-Status'] = verificationResult.status || 'unknown'; + customHeaders['X-DKIM-Result'] = verificationResult.isValid ? 'pass' : 'fail'; + } catch (error) { + logger.log('error', `Failed to verify DKIM signature: ${error.message}`); + customHeaders['X-DKIM-Status'] = 'error'; + customHeaders['X-DKIM-Result'] = 'error'; } + } + + // 2. Verify SPF if enabled + if (securityConfig.verifySpf !== false) { + try { + // Get the client IP and hostname + const clientIp = socket.remoteAddress || '127.0.0.1'; + const clientHostname = session.clientHostname || 'localhost'; - // Store verification results in headers - if (verificationResult.domain) { - customHeaders['X-DKIM-Domain'] = verificationResult.domain; + // Parse the email to get envelope from + const parsedEmail = await plugins.mailparser.simpleParser(session.emailData); + + // Create a temporary Email object for SPF verification + const tempEmail = new Email({ + from: parsedEmail.from?.value[0].address || session.mailFrom, + to: session.rcptTo[0], + subject: "Temporary Email for SPF Verification", + text: "This is a temporary email for SPF verification" + }); + + // Set envelope from for SPF verification + tempEmail.setEnvelopeFrom(session.mailFrom); + + // Verify SPF + const spfVerified = await this.mtaRef.spfVerifier.verifyAndApply( + tempEmail, + clientIp, + clientHostname + ); + + // Update SPF result + spfResult.result = spfVerified; + spfResult.domain = session.mailFrom.split('@')[1] || ''; + + // Copy SPF headers from the temp email + if (tempEmail.headers['Received-SPF']) { + customHeaders['Received-SPF'] = tempEmail.headers['Received-SPF']; + } + + // Set spam flag if SPF fails badly + if (tempEmail.mightBeSpam) { + mightBeSpam = true; + } + } catch (error) { + logger.log('error', `Failed to verify SPF: ${error.message}`); + customHeaders['Received-SPF'] = `error (${error.message})`; } + } + + // 3. Verify DMARC if enabled + if (securityConfig.verifyDmarc !== false) { + try { + // Parse the email again + const parsedEmail = await plugins.mailparser.simpleParser(session.emailData); - customHeaders['X-DKIM-Status'] = verificationResult.status || 'unknown'; - customHeaders['X-DKIM-Result'] = verificationResult.isValid ? 'pass' : 'fail'; - } catch (error) { - logger.log('error', `Failed to verify DKIM signature: ${error.message}`); - mightBeSpam = true; - customHeaders['X-DKIM-Status'] = 'error'; - customHeaders['X-DKIM-Result'] = 'error'; + // Create a temporary Email object for DMARC verification + const tempEmail = new Email({ + from: parsedEmail.from?.value[0].address || session.mailFrom, + to: session.rcptTo[0], + subject: "Temporary Email for DMARC Verification", + text: "This is a temporary email for DMARC verification" + }); + + // Verify DMARC + const dmarcResult = await this.mtaRef.dmarcVerifier.verify( + tempEmail, + spfResult, + dkimResult + ); + + // Apply DMARC policy + const dmarcPassed = this.mtaRef.dmarcVerifier.applyPolicy(tempEmail, dmarcResult); + + // Add DMARC result to headers + if (tempEmail.headers['X-DMARC-Result']) { + customHeaders['X-DMARC-Result'] = tempEmail.headers['X-DMARC-Result']; + } + + // Add Authentication-Results header combining all authentication results + customHeaders['Authentication-Results'] = `${this.mtaRef.config.smtp.hostname}; ` + + `spf=${spfResult.result ? 'pass' : 'fail'} smtp.mailfrom=${session.mailFrom}; ` + + `dkim=${dkimResult.result ? 'pass' : 'fail'} header.d=${dkimResult.domain || 'unknown'}; ` + + `dmarc=${dmarcPassed ? 'pass' : 'fail'} header.from=${tempEmail.getFromDomain()}`; + + // Set spam flag if DMARC fails + if (tempEmail.mightBeSpam) { + mightBeSpam = true; + } + } catch (error) { + logger.log('error', `Failed to verify DMARC: ${error.message}`); + customHeaders['X-DMARC-Result'] = `error (${error.message})`; + } } try { @@ -411,15 +662,62 @@ export class SMTPServer { attachments: email.attachments.length, mightBeSpam: email.mightBeSpam }); + + // Enhanced security logging for received email + SecurityLogger.getInstance().logEvent({ + level: mightBeSpam ? SecurityLogLevel.WARN : SecurityLogLevel.INFO, + type: mightBeSpam ? SecurityEventType.SPAM : SecurityEventType.EMAIL_VALIDATION, + message: `Email received and ${mightBeSpam ? 'flagged as potential spam' : 'validated successfully'}`, + domain: email.from.split('@')[1], + ipAddress: socket.remoteAddress, + details: { + from: email.from, + subject: email.subject, + recipientCount: email.getAllRecipients().length, + attachmentCount: email.attachments.length, + hasAttachments: email.hasAttachments(), + dkimStatus: customHeaders['X-DKIM-Result'] || 'unknown' + }, + success: !mightBeSpam + }); // Process or forward the email via MTA service try { await this.mtaRef.processIncomingEmail(email); } catch (err) { console.error('Error in MTA processing of incoming email:', err); + + // Log processing errors + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.EMAIL_VALIDATION, + message: `Error processing incoming email`, + domain: email.from.split('@')[1], + ipAddress: socket.remoteAddress, + details: { + error: err.message, + from: email.from, + stack: err.stack + }, + success: false + }); } } catch (error) { console.error('Error parsing email:', error); + + // Log parsing errors + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.EMAIL_VALIDATION, + message: `Error parsing incoming email`, + ipAddress: socket.remoteAddress, + details: { + error: error.message, + sender: session.mailFrom, + stack: error.stack + }, + success: false + }); } } diff --git a/ts/mta/classes.spfverifier.ts b/ts/mta/classes.spfverifier.ts new file mode 100644 index 0000000..9ea509c --- /dev/null +++ b/ts/mta/classes.spfverifier.ts @@ -0,0 +1,599 @@ +import * as plugins from '../plugins.js'; +import { logger } from '../logger.js'; +import { SecurityLogger, SecurityLogLevel, SecurityEventType } from '../security/index.js'; +import type { MtaService } from './classes.mta.js'; +import type { Email } from './classes.email.js'; +import type { IDnsVerificationResult } from './classes.dnsmanager.js'; + +/** + * SPF result qualifiers + */ +export enum SpfQualifier { + PASS = '+', + NEUTRAL = '?', + SOFTFAIL = '~', + FAIL = '-' +} + +/** + * SPF mechanism types + */ +export enum SpfMechanismType { + ALL = 'all', + INCLUDE = 'include', + A = 'a', + MX = 'mx', + IP4 = 'ip4', + IP6 = 'ip6', + EXISTS = 'exists', + REDIRECT = 'redirect', + EXP = 'exp' +} + +/** + * SPF mechanism definition + */ +export interface SpfMechanism { + qualifier: SpfQualifier; + type: SpfMechanismType; + value?: string; +} + +/** + * SPF record parsed data + */ +export interface SpfRecord { + version: string; + mechanisms: SpfMechanism[]; + modifiers: Record; +} + +/** + * SPF verification result + */ +export interface SpfResult { + result: 'pass' | 'neutral' | 'softfail' | 'fail' | 'temperror' | 'permerror' | 'none'; + explanation?: string; + domain: string; + ip: string; + record?: string; + error?: string; +} + +/** + * Maximum lookup limit for SPF records (prevent infinite loops) + */ +const MAX_SPF_LOOKUPS = 10; + +/** + * Class for verifying SPF records + */ +export class SpfVerifier { + private mtaRef: MtaService; + private lookupCount: number = 0; + + constructor(mtaRefArg: MtaService) { + this.mtaRef = mtaRefArg; + } + + /** + * Parse SPF record from TXT record + * @param record SPF TXT record + * @returns Parsed SPF record or null if invalid + */ + public parseSpfRecord(record: string): SpfRecord | null { + if (!record.startsWith('v=spf1')) { + return null; + } + + try { + const spfRecord: SpfRecord = { + version: 'spf1', + mechanisms: [], + modifiers: {} + }; + + // Split into terms + const terms = record.split(' ').filter(term => term.length > 0); + + // Skip version term + for (let i = 1; i < terms.length; i++) { + const term = terms[i]; + + // Check if it's a modifier (name=value) + if (term.includes('=')) { + const [name, value] = term.split('='); + spfRecord.modifiers[name] = value; + continue; + } + + // Parse as mechanism + let qualifier = SpfQualifier.PASS; // Default is + + let mechanismText = term; + + // Check for qualifier + if (term.startsWith('+') || term.startsWith('-') || + term.startsWith('~') || term.startsWith('?')) { + qualifier = term[0] as SpfQualifier; + mechanismText = term.substring(1); + } + + // Parse mechanism type and value + const colonIndex = mechanismText.indexOf(':'); + let type: SpfMechanismType; + let value: string | undefined; + + if (colonIndex !== -1) { + type = mechanismText.substring(0, colonIndex) as SpfMechanismType; + value = mechanismText.substring(colonIndex + 1); + } else { + type = mechanismText as SpfMechanismType; + } + + spfRecord.mechanisms.push({ qualifier, type, value }); + } + + return spfRecord; + } catch (error) { + logger.log('error', `Error parsing SPF record: ${error.message}`, { + record, + error: error.message + }); + return null; + } + } + + /** + * Check if IP is in CIDR range + * @param ip IP address to check + * @param cidr CIDR range + * @returns Whether the IP is in the CIDR range + */ + private isIpInCidr(ip: string, cidr: string): boolean { + try { + const ipAddress = plugins.ip.Address4.parse(ip); + return ipAddress.isInSubnet(new plugins.ip.Address4(cidr)); + } catch (error) { + // Try IPv6 + try { + const ipAddress = plugins.ip.Address6.parse(ip); + return ipAddress.isInSubnet(new plugins.ip.Address6(cidr)); + } catch (e) { + return false; + } + } + } + + /** + * Check if a domain has the specified IP in its A or AAAA records + * @param domain Domain to check + * @param ip IP address to check + * @returns Whether the domain resolves to the IP + */ + private async isDomainResolvingToIp(domain: string, ip: string): Promise { + try { + // First try IPv4 + const ipv4Addresses = await plugins.dns.promises.resolve4(domain); + if (ipv4Addresses.includes(ip)) { + return true; + } + + // Then try IPv6 + const ipv6Addresses = await plugins.dns.promises.resolve6(domain); + if (ipv6Addresses.includes(ip)) { + return true; + } + + return false; + } catch (error) { + return false; + } + } + + /** + * Verify SPF for a given email with IP and helo domain + * @param email Email to verify + * @param ip Sender IP address + * @param heloDomain HELO/EHLO domain used by sender + * @returns SPF verification result + */ + public async verify( + email: Email, + ip: string, + heloDomain: string + ): Promise { + const securityLogger = SecurityLogger.getInstance(); + + // Reset lookup count + this.lookupCount = 0; + + // Get domain from envelope from (return-path) + const domain = email.getEnvelopeFrom().split('@')[1] || ''; + + if (!domain) { + return { + result: 'permerror', + explanation: 'No envelope from domain', + domain: '', + ip + }; + } + + try { + // Look up SPF record + const spfVerificationResult = await this.mtaRef.dnsManager.verifySpfRecord(domain); + + if (!spfVerificationResult.found) { + return { + result: 'none', + explanation: 'No SPF record found', + domain, + ip + }; + } + + if (!spfVerificationResult.valid) { + return { + result: 'permerror', + explanation: 'Invalid SPF record', + domain, + ip, + record: spfVerificationResult.value + }; + } + + // Parse SPF record + const spfRecord = this.parseSpfRecord(spfVerificationResult.value); + + if (!spfRecord) { + return { + result: 'permerror', + explanation: 'Failed to parse SPF record', + domain, + ip, + record: spfVerificationResult.value + }; + } + + // Check SPF record + const result = await this.checkSpfRecord(spfRecord, domain, ip); + + // Log the result + const spfLogLevel = result.result === 'pass' ? + SecurityLogLevel.INFO : + (result.result === 'fail' ? SecurityLogLevel.WARN : SecurityLogLevel.INFO); + + securityLogger.logEvent({ + level: spfLogLevel, + type: SecurityEventType.SPF, + message: `SPF ${result.result} for ${domain} from IP ${ip}`, + domain, + details: { + ip, + heloDomain, + result: result.result, + explanation: result.explanation, + record: spfVerificationResult.value + }, + success: result.result === 'pass' + }); + + return { + ...result, + domain, + ip, + record: spfVerificationResult.value + }; + } catch (error) { + // Log error + logger.log('error', `SPF verification error: ${error.message}`, { + domain, + ip, + error: error.message + }); + + securityLogger.logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.SPF, + message: `SPF verification error for ${domain}`, + domain, + details: { + ip, + error: error.message + }, + success: false + }); + + return { + result: 'temperror', + explanation: `Error verifying SPF: ${error.message}`, + domain, + ip, + error: error.message + }; + } + } + + /** + * Check SPF record against IP address + * @param spfRecord Parsed SPF record + * @param domain Domain being checked + * @param ip IP address to check + * @returns SPF result + */ + private async checkSpfRecord( + spfRecord: SpfRecord, + domain: string, + ip: string + ): Promise { + // Check for 'redirect' modifier + if (spfRecord.modifiers.redirect) { + this.lookupCount++; + + if (this.lookupCount > MAX_SPF_LOOKUPS) { + return { + result: 'permerror', + explanation: 'Too many DNS lookups', + domain, + ip + }; + } + + // Handle redirect + const redirectDomain = spfRecord.modifiers.redirect; + const redirectResult = await this.mtaRef.dnsManager.verifySpfRecord(redirectDomain); + + if (!redirectResult.found || !redirectResult.valid) { + return { + result: 'permerror', + explanation: `Invalid redirect to ${redirectDomain}`, + domain, + ip + }; + } + + const redirectRecord = this.parseSpfRecord(redirectResult.value); + + if (!redirectRecord) { + return { + result: 'permerror', + explanation: `Failed to parse redirect record from ${redirectDomain}`, + domain, + ip + }; + } + + return this.checkSpfRecord(redirectRecord, redirectDomain, ip); + } + + // Check each mechanism in order + for (const mechanism of spfRecord.mechanisms) { + let matched = false; + + switch (mechanism.type) { + case SpfMechanismType.ALL: + matched = true; + break; + + case SpfMechanismType.IP4: + if (mechanism.value) { + matched = this.isIpInCidr(ip, mechanism.value); + } + break; + + case SpfMechanismType.IP6: + if (mechanism.value) { + matched = this.isIpInCidr(ip, mechanism.value); + } + break; + + case SpfMechanismType.A: + this.lookupCount++; + + if (this.lookupCount > MAX_SPF_LOOKUPS) { + return { + result: 'permerror', + explanation: 'Too many DNS lookups', + domain, + ip + }; + } + + // Check if domain has A/AAAA record matching IP + const checkDomain = mechanism.value || domain; + matched = await this.isDomainResolvingToIp(checkDomain, ip); + break; + + case SpfMechanismType.MX: + this.lookupCount++; + + if (this.lookupCount > MAX_SPF_LOOKUPS) { + return { + result: 'permerror', + explanation: 'Too many DNS lookups', + domain, + ip + }; + } + + // Check MX records + const mxDomain = mechanism.value || domain; + + try { + const mxRecords = await plugins.dns.promises.resolveMx(mxDomain); + + for (const mx of mxRecords) { + // Check if this MX record's IP matches + const mxMatches = await this.isDomainResolvingToIp(mx.exchange, ip); + + if (mxMatches) { + matched = true; + break; + } + } + } catch (error) { + // No MX records or error + matched = false; + } + break; + + case SpfMechanismType.INCLUDE: + if (!mechanism.value) { + continue; + } + + this.lookupCount++; + + if (this.lookupCount > MAX_SPF_LOOKUPS) { + return { + result: 'permerror', + explanation: 'Too many DNS lookups', + domain, + ip + }; + } + + // Check included domain's SPF record + const includeDomain = mechanism.value; + const includeResult = await this.mtaRef.dnsManager.verifySpfRecord(includeDomain); + + if (!includeResult.found || !includeResult.valid) { + continue; // Skip this mechanism + } + + const includeRecord = this.parseSpfRecord(includeResult.value); + + if (!includeRecord) { + continue; // Skip this mechanism + } + + // Recursively check the included SPF record + const includeCheck = await this.checkSpfRecord(includeRecord, includeDomain, ip); + + // Include mechanism matches if the result is "pass" + matched = includeCheck.result === 'pass'; + break; + + case SpfMechanismType.EXISTS: + if (!mechanism.value) { + continue; + } + + this.lookupCount++; + + if (this.lookupCount > MAX_SPF_LOOKUPS) { + return { + result: 'permerror', + explanation: 'Too many DNS lookups', + domain, + ip + }; + } + + // Check if domain exists (has any A record) + try { + await plugins.dns.promises.resolve(mechanism.value, 'A'); + matched = true; + } catch (error) { + matched = false; + } + break; + } + + // If this mechanism matched, return its result + if (matched) { + switch (mechanism.qualifier) { + case SpfQualifier.PASS: + return { + result: 'pass', + explanation: `Matched ${mechanism.type}${mechanism.value ? ':' + mechanism.value : ''}`, + domain, + ip + }; + case SpfQualifier.FAIL: + return { + result: 'fail', + explanation: `Matched ${mechanism.type}${mechanism.value ? ':' + mechanism.value : ''}`, + domain, + ip + }; + case SpfQualifier.SOFTFAIL: + return { + result: 'softfail', + explanation: `Matched ${mechanism.type}${mechanism.value ? ':' + mechanism.value : ''}`, + domain, + ip + }; + case SpfQualifier.NEUTRAL: + return { + result: 'neutral', + explanation: `Matched ${mechanism.type}${mechanism.value ? ':' + mechanism.value : ''}`, + domain, + ip + }; + } + } + } + + // If no mechanism matched, default to neutral + return { + result: 'neutral', + explanation: 'No matching mechanism found', + domain, + ip + }; + } + + /** + * Check if email passes SPF verification + * @param email Email to verify + * @param ip Sender IP address + * @param heloDomain HELO/EHLO domain used by sender + * @returns Whether email passes SPF + */ + public async verifyAndApply( + email: Email, + ip: string, + heloDomain: string + ): Promise { + const result = await this.verify(email, ip, heloDomain); + + // Add headers + email.headers['Received-SPF'] = `${result.result} (${result.domain}: ${result.explanation}) client-ip=${ip}; envelope-from=${email.getEnvelopeFrom()}; helo=${heloDomain};`; + + // Apply policy based on result + switch (result.result) { + case 'fail': + // Fail - mark as spam + email.mightBeSpam = true; + logger.log('warn', `SPF failed for ${result.domain} from ${ip}: ${result.explanation}`); + return false; + + case 'softfail': + // Soft fail - accept but mark as suspicious + email.mightBeSpam = true; + logger.log('info', `SPF softfailed for ${result.domain} from ${ip}: ${result.explanation}`); + return true; + + case 'neutral': + case 'none': + // Neutral or none - accept but note in headers + logger.log('info', `SPF ${result.result} for ${result.domain} from ${ip}: ${result.explanation}`); + return true; + + case 'pass': + // Pass - accept + logger.log('info', `SPF passed for ${result.domain} from ${ip}: ${result.explanation}`); + return true; + + case 'temperror': + case 'permerror': + // Temporary or permanent error - log but accept + logger.log('error', `SPF error for ${result.domain} from ${ip}: ${result.explanation}`); + return true; + + default: + return true; + } + } +} \ No newline at end of file diff --git a/ts/mta/index.ts b/ts/mta/index.ts index f1d3b3c..febf48f 100644 --- a/ts/mta/index.ts +++ b/ts/mta/index.ts @@ -1,7 +1,10 @@ export * from './classes.dkimcreator.js'; export * from './classes.emailsignjob.js'; export * from './classes.dkimverifier.js'; +export * from './classes.dmarcverifier.js'; +export * from './classes.spfverifier.js'; export * from './classes.mta.js'; export * from './classes.smtpserver.js'; export * from './classes.emailsendjob.js'; export * from './classes.email.js'; +export * from './classes.ratelimiter.js'; diff --git a/ts/paths.ts b/ts/paths.ts index fc44938..25c09b4 100644 --- a/ts/paths.ts +++ b/ts/paths.ts @@ -6,7 +6,12 @@ export const packageDir = plugins.path.join( plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url), '../' ); -export const dataDir = plugins.path.join(baseDir, 'data'); + +// Configure data directory with environment variable or default to .nogit/data +const DEFAULT_DATA_PATH = '.nogit/data'; +export const dataDir = process.env.DATA_DIR + ? process.env.DATA_DIR + : plugins.path.join(baseDir, DEFAULT_DATA_PATH); // MTA directories export const keysDir = plugins.path.join(dataDir, 'keys'); diff --git a/ts/platformservice.ts b/ts/platformservice.ts index 72a964a..592c1ea 100644 --- a/ts/platformservice.ts +++ b/ts/platformservice.ts @@ -3,7 +3,6 @@ import * as paths from './paths.js'; import { PlatformServiceDb } from './classes.platformservicedb.js' import { EmailService } from './email/classes.emailservice.js'; import { SmsService } from './sms/classes.smsservice.js'; -import { LetterService } from './letter/classes.letterservice.js'; import { MtaService } from './mta/classes.mta.js'; export class SzPlatformService { @@ -16,7 +15,6 @@ export class SzPlatformService { // SubServices public emailService: EmailService; - public letterService: LetterService; public mtaService: MtaService; public smsService: SmsService; @@ -26,10 +24,6 @@ export class SzPlatformService { // lets start the sub services this.emailService = new EmailService(this); - this.letterService = new LetterService(this, { - letterxpressUser: await this.serviceQenv.getEnvVarOnDemand('LETTER_API_USER'), - letterxpressToken: await this.serviceQenv.getEnvVarOnDemand('LETTER_API_TOKEN') - }); this.mtaService = new MtaService(this); this.smsService = new SmsService(this, { apiGatewayApiToken: await this.serviceQenv.getEnvVarOnDemand('SMS_API_TOKEN'), diff --git a/ts/plugins.ts b/ts/plugins.ts index 936ecaa..d6fda0e 100644 --- a/ts/plugins.ts +++ b/ts/plugins.ts @@ -57,11 +57,9 @@ export { projectinfo, qenv, smartacme, smartdata, smartdns, smartfile, smartlog, // apiclient.xyz scope import * as cloudflare from '@apiclient.xyz/cloudflare'; -import * as letterxpress from '@apiclient.xyz/letterxpress'; export { cloudflare, - letterxpress, } // tsclass scope @@ -76,10 +74,12 @@ import * as mailauth from 'mailauth'; import { dkimSign } from 'mailauth/lib/dkim/sign.js'; import mailparser from 'mailparser'; import * as uuid from 'uuid'; +import * as ip from 'ip'; export { mailauth, dkimSign, mailparser, uuid, + ip, } diff --git a/ts/security/classes.contentscanner.ts b/ts/security/classes.contentscanner.ts new file mode 100644 index 0000000..86f0ee7 --- /dev/null +++ b/ts/security/classes.contentscanner.ts @@ -0,0 +1,739 @@ +import * as plugins from '../plugins.js'; +import * as paths from '../paths.js'; +import { logger } from '../logger.js'; +import { Email } from '../mta/classes.email.js'; +import type { IAttachment } from '../mta/classes.email.js'; +import { SecurityLogger, SecurityLogLevel, SecurityEventType } from './classes.securitylogger.js'; +import { LRUCache } from 'lru-cache'; + +/** + * Scan result information + */ +export interface IScanResult { + isClean: boolean; // Whether the content is clean (no threats detected) + threatType?: string; // Type of threat if detected + threatDetails?: string; // Details about the detected threat + threatScore: number; // 0 (clean) to 100 (definitely malicious) + scannedElements: string[]; // What was scanned (subject, body, attachments, etc.) + timestamp: number; // When this scan was performed +} + +/** + * Options for content scanner configuration + */ +export interface IContentScannerOptions { + maxCacheSize?: number; // Maximum number of entries to cache + cacheTTL?: number; // TTL for cache entries in ms + scanSubject?: boolean; // Whether to scan email subjects + scanBody?: boolean; // Whether to scan email bodies + scanAttachments?: boolean; // Whether to scan attachments + maxAttachmentSizeToScan?: number; // Max size of attachments to scan in bytes + scanAttachmentNames?: boolean; // Whether to scan attachment filenames + blockExecutables?: boolean; // Whether to block executable attachments + blockMacros?: boolean; // Whether to block documents with macros + customRules?: Array<{ // Custom scanning rules + pattern: string | RegExp; // Pattern to match + type: string; // Type of threat + score: number; // Threat score + description: string; // Description of the threat + }>; + minThreatScore?: number; // Minimum score to consider content as a threat + highThreatScore?: number; // Score above which content is considered high threat +} + +/** + * Threat categories + */ +export enum ThreatCategory { + SPAM = 'spam', + PHISHING = 'phishing', + MALWARE = 'malware', + EXECUTABLE = 'executable', + SUSPICIOUS_LINK = 'suspicious_link', + MALICIOUS_MACRO = 'malicious_macro', + XSS = 'xss', + SENSITIVE_DATA = 'sensitive_data', + BLACKLISTED_CONTENT = 'blacklisted_content', + CUSTOM_RULE = 'custom_rule' +} + +/** + * Content Scanner for detecting malicious email content + */ +export class ContentScanner { + private static instance: ContentScanner; + private scanCache: LRUCache; + private options: Required; + + // Predefined patterns for common threats + private static readonly MALICIOUS_PATTERNS = { + // Phishing patterns + phishing: [ + /(?:verify|confirm|update|login).*(?:account|password|details)/i, + /urgent.*(?:action|attention|required)/i, + /(?:paypal|apple|microsoft|amazon|google|bank).*(?:verify|confirm|suspend)/i, + /your.*(?:account).*(?:suspended|compromised|locked)/i, + /\b(?:password reset|security alert|security notice)\b/i + ], + + // Spam indicators + spam: [ + /\b(?:viagra|cialis|enlargement|diet pill|lose weight fast|cheap meds)\b/i, + /\b(?:million dollars|lottery winner|prize claim|inheritance|rich widow)\b/i, + /\b(?:earn from home|make money fast|earn \$\d{3,}\/day)\b/i, + /\b(?:limited time offer|act now|exclusive deal|only \d+ left)\b/i, + /\b(?:forex|stock tip|investment opportunity|cryptocurrency|bitcoin)\b/i + ], + + // Malware indicators in text + malware: [ + /(?:attached file|see attachment).*(?:invoice|receipt|statement|document)/i, + /open.*(?:the attached|this attachment)/i, + /(?:enable|allow).*(?:macros|content|editing)/i, + /download.*(?:attachment|file|document)/i, + /\b(?:ransomware protection|virus alert|malware detected)\b/i + ], + + // Suspicious links + suspiciousLinks: [ + /https?:\/\/bit\.ly\//i, + /https?:\/\/goo\.gl\//i, + /https?:\/\/t\.co\//i, + /https?:\/\/tinyurl\.com\//i, + /https?:\/\/(?:\d{1,3}\.){3}\d{1,3}/i, // IP address URLs + /https?:\/\/.*\.(?:xyz|top|club|gq|cf)\//i, // Suspicious TLDs + /(?:login|account|signin|auth).*\.(?!gov|edu|com|org|net)\w+\.\w+/i, // Login pages on unusual domains + ], + + // XSS and script injection + scriptInjection: [ + /.*<\/script>/is, + /javascript:/i, + /on(?:click|load|mouse|error|focus|blur)=".*"/i, + /document\.(?:cookie|write|location)/i, + /eval\s*\(/i + ], + + // Sensitive data patterns + sensitiveData: [ + /\b(?:\d{3}-\d{2}-\d{4}|\d{9})\b/, // SSN + /\b\d{13,16}\b/, // Credit card numbers + /\b(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})\b/ // Possible Base64 + ] + }; + + // Common executable extensions + private static readonly EXECUTABLE_EXTENSIONS = [ + '.exe', '.dll', '.bat', '.cmd', '.msi', '.js', '.vbs', '.ps1', + '.sh', '.jar', '.py', '.com', '.scr', '.pif', '.hta', '.cpl', + '.reg', '.vba', '.lnk', '.wsf', '.msi', '.msp', '.mst' + ]; + + // Document formats that may contain macros + private static readonly MACRO_DOCUMENT_EXTENSIONS = [ + '.doc', '.docm', '.xls', '.xlsm', '.ppt', '.pptm', '.dotm', '.xlsb', '.ppam', '.potm' + ]; + + /** + * Default options for the content scanner + */ + private static readonly DEFAULT_OPTIONS: Required = { + maxCacheSize: 10000, + cacheTTL: 24 * 60 * 60 * 1000, // 24 hours + scanSubject: true, + scanBody: true, + scanAttachments: true, + maxAttachmentSizeToScan: 10 * 1024 * 1024, // 10MB + scanAttachmentNames: true, + blockExecutables: true, + blockMacros: true, + customRules: [], + minThreatScore: 30, // Minimum score to consider content as a threat + highThreatScore: 70 // Score above which content is considered high threat + }; + + /** + * Constructor for the ContentScanner + * @param options Configuration options + */ + constructor(options: IContentScannerOptions = {}) { + // Merge with default options + this.options = { + ...ContentScanner.DEFAULT_OPTIONS, + ...options + }; + + // Initialize cache + this.scanCache = new LRUCache({ + max: this.options.maxCacheSize, + ttl: this.options.cacheTTL, + }); + + logger.log('info', 'ContentScanner initialized'); + } + + /** + * Get the singleton instance of the scanner + * @param options Configuration options + * @returns Singleton scanner instance + */ + public static getInstance(options: IContentScannerOptions = {}): ContentScanner { + if (!ContentScanner.instance) { + ContentScanner.instance = new ContentScanner(options); + } + return ContentScanner.instance; + } + + /** + * Scan an email for malicious content + * @param email The email to scan + * @returns Scan result + */ + public async scanEmail(email: Email): Promise { + try { + // Generate a cache key from the email + const cacheKey = this.generateCacheKey(email); + + // Check cache first + const cachedResult = this.scanCache.get(cacheKey); + if (cachedResult) { + logger.log('info', `Using cached scan result for email ${email.getMessageId()}`); + return cachedResult; + } + + // Initialize scan result + const result: IScanResult = { + isClean: true, + threatScore: 0, + scannedElements: [], + timestamp: Date.now() + }; + + // List of scan promises + const scanPromises: Array> = []; + + // Scan subject + if (this.options.scanSubject && email.subject) { + scanPromises.push(this.scanSubject(email.subject, result)); + } + + // Scan body content + if (this.options.scanBody) { + if (email.text) { + scanPromises.push(this.scanTextContent(email.text, result)); + } + + if (email.html) { + scanPromises.push(this.scanHtmlContent(email.html, result)); + } + } + + // Scan attachments + if (this.options.scanAttachments && email.attachments && email.attachments.length > 0) { + for (const attachment of email.attachments) { + scanPromises.push(this.scanAttachment(attachment, result)); + } + } + + // Run all scans in parallel + await Promise.all(scanPromises); + + // Determine if the email is clean based on threat score + result.isClean = result.threatScore < this.options.minThreatScore; + + // Save to cache + this.scanCache.set(cacheKey, result); + + // Log high threat findings + if (result.threatScore >= this.options.highThreatScore) { + this.logHighThreatFound(email, result); + } else if (!result.isClean) { + this.logThreatFound(email, result); + } + + return result; + } catch (error) { + logger.log('error', `Error scanning email: ${error.message}`, { + messageId: email.getMessageId(), + error: error.stack + }); + + // Return a safe default with error indication + return { + isClean: true, // Let it pass if scanner fails (configure as desired) + threatScore: 0, + scannedElements: ['error'], + timestamp: Date.now(), + threatType: 'scan_error', + threatDetails: `Scan error: ${error.message}` + }; + } + } + + /** + * Generate a cache key from an email + * @param email The email to generate a key for + * @returns Cache key + */ + private generateCacheKey(email: Email): string { + // Use message ID if available + if (email.getMessageId()) { + return `email:${email.getMessageId()}`; + } + + // Fallback to a hash of key content + const contentToHash = [ + email.from, + email.subject || '', + email.text?.substring(0, 1000) || '', + email.html?.substring(0, 1000) || '', + email.attachments?.length || 0 + ].join(':'); + + return `email:${plugins.crypto.createHash('sha256').update(contentToHash).digest('hex')}`; + } + + /** + * Scan email subject for threats + * @param subject The subject to scan + * @param result The scan result to update + */ + private async scanSubject(subject: string, result: IScanResult): Promise { + result.scannedElements.push('subject'); + + // Check against phishing patterns + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.phishing) { + if (pattern.test(subject)) { + result.threatScore += 25; + result.threatType = ThreatCategory.PHISHING; + result.threatDetails = `Subject contains potential phishing indicators: ${subject}`; + return; + } + } + + // Check against spam patterns + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.spam) { + if (pattern.test(subject)) { + result.threatScore += 15; + result.threatType = ThreatCategory.SPAM; + result.threatDetails = `Subject contains potential spam indicators: ${subject}`; + return; + } + } + + // Check custom rules + for (const rule of this.options.customRules) { + const pattern = rule.pattern instanceof RegExp ? rule.pattern : new RegExp(rule.pattern, 'i'); + if (pattern.test(subject)) { + result.threatScore += rule.score; + result.threatType = rule.type; + result.threatDetails = rule.description; + return; + } + } + } + + /** + * Scan plain text content for threats + * @param text The text content to scan + * @param result The scan result to update + */ + private async scanTextContent(text: string, result: IScanResult): Promise { + result.scannedElements.push('text'); + + // Check suspicious links + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.suspiciousLinks) { + if (pattern.test(text)) { + result.threatScore += 20; + if (!result.threatType || result.threatScore > (result.threatType === ThreatCategory.SUSPICIOUS_LINK ? 0 : 20)) { + result.threatType = ThreatCategory.SUSPICIOUS_LINK; + result.threatDetails = `Text contains suspicious links`; + } + } + } + + // Check phishing + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.phishing) { + if (pattern.test(text)) { + result.threatScore += 25; + if (!result.threatType || result.threatScore > (result.threatType === ThreatCategory.PHISHING ? 0 : 25)) { + result.threatType = ThreatCategory.PHISHING; + result.threatDetails = `Text contains potential phishing indicators`; + } + } + } + + // Check spam + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.spam) { + if (pattern.test(text)) { + result.threatScore += 15; + if (!result.threatType || result.threatScore > (result.threatType === ThreatCategory.SPAM ? 0 : 15)) { + result.threatType = ThreatCategory.SPAM; + result.threatDetails = `Text contains potential spam indicators`; + } + } + } + + // Check malware indicators + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.malware) { + if (pattern.test(text)) { + result.threatScore += 30; + if (!result.threatType || result.threatScore > (result.threatType === ThreatCategory.MALWARE ? 0 : 30)) { + result.threatType = ThreatCategory.MALWARE; + result.threatDetails = `Text contains potential malware indicators`; + } + } + } + + // Check sensitive data + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.sensitiveData) { + if (pattern.test(text)) { + result.threatScore += 25; + if (!result.threatType || result.threatScore > (result.threatType === ThreatCategory.SENSITIVE_DATA ? 0 : 25)) { + result.threatType = ThreatCategory.SENSITIVE_DATA; + result.threatDetails = `Text contains potentially sensitive data patterns`; + } + } + } + + // Check custom rules + for (const rule of this.options.customRules) { + const pattern = rule.pattern instanceof RegExp ? rule.pattern : new RegExp(rule.pattern, 'i'); + if (pattern.test(text)) { + result.threatScore += rule.score; + if (!result.threatType || result.threatScore > 20) { + result.threatType = rule.type; + result.threatDetails = rule.description; + } + } + } + } + + /** + * Scan HTML content for threats + * @param html The HTML content to scan + * @param result The scan result to update + */ + private async scanHtmlContent(html: string, result: IScanResult): Promise { + result.scannedElements.push('html'); + + // Check for script injection + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.scriptInjection) { + if (pattern.test(html)) { + result.threatScore += 40; + if (!result.threatType || result.threatType !== ThreatCategory.XSS) { + result.threatType = ThreatCategory.XSS; + result.threatDetails = `HTML contains potentially malicious script content`; + } + } + } + + // Extract text content from HTML for further scanning + const textContent = this.extractTextFromHtml(html); + if (textContent) { + // We'll leverage the text scanning but not double-count threat score + const tempResult: IScanResult = { + isClean: true, + threatScore: 0, + scannedElements: [], + timestamp: Date.now() + }; + + await this.scanTextContent(textContent, tempResult); + + // Only add additional threat types if they're more severe + if (tempResult.threatType && tempResult.threatScore > 0) { + // Add half of the text content score to avoid double counting + result.threatScore += Math.floor(tempResult.threatScore / 2); + + // Adopt the threat type if more severe or no existing type + if (!result.threatType || tempResult.threatScore > result.threatScore) { + result.threatType = tempResult.threatType; + result.threatDetails = tempResult.threatDetails; + } + } + } + + // Extract and check links from HTML + const links = this.extractLinksFromHtml(html); + if (links.length > 0) { + // Check for suspicious links + let suspiciousLinks = 0; + for (const link of links) { + for (const pattern of ContentScanner.MALICIOUS_PATTERNS.suspiciousLinks) { + if (pattern.test(link)) { + suspiciousLinks++; + break; + } + } + } + + if (suspiciousLinks > 0) { + // Add score based on percentage of suspicious links + const suspiciousPercentage = (suspiciousLinks / links.length) * 100; + const additionalScore = Math.min(40, Math.floor(suspiciousPercentage / 2.5)); + result.threatScore += additionalScore; + + if (!result.threatType || additionalScore > 20) { + result.threatType = ThreatCategory.SUSPICIOUS_LINK; + result.threatDetails = `HTML contains ${suspiciousLinks} suspicious links out of ${links.length} total links`; + } + } + } + } + + /** + * Scan an attachment for threats + * @param attachment The attachment to scan + * @param result The scan result to update + */ + private async scanAttachment(attachment: IAttachment, result: IScanResult): Promise { + const filename = attachment.filename.toLowerCase(); + result.scannedElements.push(`attachment:${filename}`); + + // Skip large attachments if configured + if (attachment.content && attachment.content.length > this.options.maxAttachmentSizeToScan) { + logger.log('info', `Skipping scan of large attachment: ${filename} (${attachment.content.length} bytes)`); + return; + } + + // Check filename for executable extensions + if (this.options.blockExecutables) { + for (const ext of ContentScanner.EXECUTABLE_EXTENSIONS) { + if (filename.endsWith(ext)) { + result.threatScore += 70; // High score for executable attachments + result.threatType = ThreatCategory.EXECUTABLE; + result.threatDetails = `Attachment has a potentially dangerous extension: ${filename}`; + return; // No need to scan contents if filename already flagged + } + } + } + + // Check for Office documents with macros + if (this.options.blockMacros) { + for (const ext of ContentScanner.MACRO_DOCUMENT_EXTENSIONS) { + if (filename.endsWith(ext)) { + // For Office documents, check if they contain macros + // This is a simplified check - a real implementation would use specialized libraries + // to detect macros in Office documents + if (attachment.content && this.likelyContainsMacros(attachment)) { + result.threatScore += 60; + result.threatType = ThreatCategory.MALICIOUS_MACRO; + result.threatDetails = `Attachment appears to contain macros: ${filename}`; + return; + } + } + } + } + + // Perform basic content analysis if we have content buffer + if (attachment.content) { + // Convert to string for scanning, with a limit to prevent memory issues + const textContent = this.extractTextFromBuffer(attachment.content); + + if (textContent) { + // Scan for malicious patterns in attachment content + for (const category in ContentScanner.MALICIOUS_PATTERNS) { + const patterns = ContentScanner.MALICIOUS_PATTERNS[category]; + for (const pattern of patterns) { + if (pattern.test(textContent)) { + result.threatScore += 30; + + if (!result.threatType) { + result.threatType = this.mapCategoryToThreatType(category); + result.threatDetails = `Attachment content contains suspicious patterns: ${filename}`; + } + + break; + } + } + } + } + + // Check for PE headers (Windows executables) + if (attachment.content.length > 64 && + attachment.content[0] === 0x4D && + attachment.content[1] === 0x5A) { // 'MZ' header + result.threatScore += 80; + result.threatType = ThreatCategory.EXECUTABLE; + result.threatDetails = `Attachment contains executable code: ${filename}`; + } + } + } + + /** + * Extract links from HTML content + * @param html HTML content + * @returns Array of extracted links + */ + private extractLinksFromHtml(html: string): string[] { + const links: string[] = []; + + // Simple regex-based extraction - a real implementation might use a proper HTML parser + const matches = html.match(/href=["'](https?:\/\/[^"']+)["']/gi); + if (matches) { + for (const match of matches) { + const linkMatch = match.match(/href=["'](https?:\/\/[^"']+)["']/i); + if (linkMatch && linkMatch[1]) { + links.push(linkMatch[1]); + } + } + } + + return links; + } + + /** + * Extract plain text from HTML + * @param html HTML content + * @returns Extracted text + */ + private extractTextFromHtml(html: string): string { + // Remove HTML tags and decode entities - simplified version + return html + .replace(/]*>.*?<\/style>/gs, '') + .replace(/]*>.*?<\/script>/gs, '') + .replace(/<[^>]+>/g, ' ') + .replace(/ /g, ' ') + .replace(/</g, '<') + .replace(/>/g, '>') + .replace(/&/g, '&') + .replace(/"/g, '"') + .replace(/'/g, "'") + .replace(/\s+/g, ' ') + .trim(); + } + + /** + * Extract text from a binary buffer for scanning + * @param buffer Binary content + * @returns Extracted text (may be partial) + */ + private extractTextFromBuffer(buffer: Buffer): string { + try { + // Limit the amount we convert to avoid memory issues + const sampleSize = Math.min(buffer.length, 100 * 1024); // 100KB max sample + const sample = buffer.slice(0, sampleSize); + + // Try to convert to string, filtering out non-printable chars + return sample.toString('utf8') + .replace(/[\x00-\x09\x0B-\x1F\x7F-\x9F]/g, '') // Remove control chars + .replace(/\uFFFD/g, ''); // Remove replacement char + } catch (error) { + logger.log('warn', `Error extracting text from buffer: ${error.message}`); + return ''; + } + } + + /** + * Check if an Office document likely contains macros + * This is a simplified check - real implementation would use specialized libraries + * @param attachment The attachment to check + * @returns Whether the file likely contains macros + */ + private likelyContainsMacros(attachment: IAttachment): boolean { + // Simple heuristic: look for VBA/macro related strings + // This is a simplified approach and not comprehensive + const content = this.extractTextFromBuffer(attachment.content); + const macroIndicators = [ + /vbaProject\.bin/i, + /Microsoft VBA/i, + /\bVBA\b/, + /Auto_Open/i, + /AutoExec/i, + /DocumentOpen/i, + /AutoOpen/i, + /\bExecute\(/i, + /\bShell\(/i, + /\bCreateObject\(/i + ]; + + for (const indicator of macroIndicators) { + if (indicator.test(content)) { + return true; + } + } + + return false; + } + + /** + * Map a pattern category to a threat type + * @param category The pattern category + * @returns The corresponding threat type + */ + private mapCategoryToThreatType(category: string): string { + switch (category) { + case 'phishing': return ThreatCategory.PHISHING; + case 'spam': return ThreatCategory.SPAM; + case 'malware': return ThreatCategory.MALWARE; + case 'suspiciousLinks': return ThreatCategory.SUSPICIOUS_LINK; + case 'scriptInjection': return ThreatCategory.XSS; + case 'sensitiveData': return ThreatCategory.SENSITIVE_DATA; + default: return ThreatCategory.BLACKLISTED_CONTENT; + } + } + + /** + * Log a high threat finding to the security logger + * @param email The email containing the threat + * @param result The scan result + */ + private logHighThreatFound(email: Email, result: IScanResult): void { + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.ERROR, + type: SecurityEventType.MALWARE, + message: `High threat content detected in email from ${email.from} to ${email.to.join(', ')}`, + details: { + messageId: email.getMessageId(), + threatType: result.threatType, + threatDetails: result.threatDetails, + threatScore: result.threatScore, + scannedElements: result.scannedElements, + subject: email.subject + }, + success: false, + domain: email.getFromDomain() + }); + } + + /** + * Log a threat finding to the security logger + * @param email The email containing the threat + * @param result The scan result + */ + private logThreatFound(email: Email, result: IScanResult): void { + SecurityLogger.getInstance().logEvent({ + level: SecurityLogLevel.WARN, + type: SecurityEventType.SPAM, + message: `Suspicious content detected in email from ${email.from} to ${email.to.join(', ')}`, + details: { + messageId: email.getMessageId(), + threatType: result.threatType, + threatDetails: result.threatDetails, + threatScore: result.threatScore, + scannedElements: result.scannedElements, + subject: email.subject + }, + success: false, + domain: email.getFromDomain() + }); + } + + /** + * Get threat level description based on score + * @param score Threat score + * @returns Threat level description + */ + public static getThreatLevel(score: number): 'none' | 'low' | 'medium' | 'high' { + if (score < 20) { + return 'none'; + } else if (score < 40) { + return 'low'; + } else if (score < 70) { + return 'medium'; + } else { + return 'high'; + } + } +} \ No newline at end of file diff --git a/ts/security/classes.ipreputationchecker.ts b/ts/security/classes.ipreputationchecker.ts new file mode 100644 index 0000000..d2dde90 --- /dev/null +++ b/ts/security/classes.ipreputationchecker.ts @@ -0,0 +1,513 @@ +import * as plugins from '../plugins.js'; +import * as paths from '../paths.js'; +import { logger } from '../logger.js'; +import { SecurityLogger, SecurityLogLevel, SecurityEventType } from './classes.securitylogger.js'; +import { LRUCache } from 'lru-cache'; + +/** + * Reputation check result information + */ +export interface IReputationResult { + score: number; // 0 (worst) to 100 (best) + isSpam: boolean; // true if the IP is known for spam + isProxy: boolean; // true if the IP is a known proxy + isTor: boolean; // true if the IP is a known Tor exit node + isVPN: boolean; // true if the IP is a known VPN + country?: string; // Country code (if available) + asn?: string; // Autonomous System Number (if available) + org?: string; // Organization name (if available) + blacklists?: string[]; // Names of blacklists that include this IP + timestamp: number; // When this result was created/retrieved + error?: string; // Error message if check failed +} + +/** + * Reputation threshold scores + */ +export enum ReputationThreshold { + HIGH_RISK = 20, // Score below this is considered high risk + MEDIUM_RISK = 50, // Score below this is considered medium risk + LOW_RISK = 80 // Score below this is considered low risk (but not trusted) +} + +/** + * IP type classifications + */ +export enum IPType { + RESIDENTIAL = 'residential', + DATACENTER = 'datacenter', + PROXY = 'proxy', + TOR = 'tor', + VPN = 'vpn', + UNKNOWN = 'unknown' +} + +/** + * Options for the IP Reputation Checker + */ +export interface IIPReputationOptions { + maxCacheSize?: number; // Maximum number of IPs to cache (default: 10000) + cacheTTL?: number; // TTL for cache entries in ms (default: 24 hours) + dnsblServers?: string[]; // List of DNSBL servers to check + highRiskThreshold?: number; // Score below this is high risk + mediumRiskThreshold?: number; // Score below this is medium risk + lowRiskThreshold?: number; // Score below this is low risk + enableLocalCache?: boolean; // Whether to persist cache to disk (default: true) + enableDNSBL?: boolean; // Whether to use DNSBL checks (default: true) + enableIPInfo?: boolean; // Whether to use IP info service (default: true) +} + +/** + * Class for checking IP reputation of inbound email senders + */ +export class IPReputationChecker { + private static instance: IPReputationChecker; + private reputationCache: LRUCache; + private options: Required; + + // Default DNSBL servers + private static readonly DEFAULT_DNSBL_SERVERS = [ + 'zen.spamhaus.org', // Spamhaus + 'bl.spamcop.net', // SpamCop + 'b.barracudacentral.org', // Barracuda + 'spam.dnsbl.sorbs.net', // SORBS + 'dnsbl.sorbs.net', // SORBS (expanded) + 'cbl.abuseat.org', // Composite Blocking List + 'xbl.spamhaus.org', // Spamhaus XBL + 'pbl.spamhaus.org', // Spamhaus PBL + 'dnsbl-1.uceprotect.net', // UCEPROTECT + 'psbl.surriel.com' // PSBL + ]; + + // Default options + private static readonly DEFAULT_OPTIONS: Required = { + maxCacheSize: 10000, + cacheTTL: 24 * 60 * 60 * 1000, // 24 hours + dnsblServers: IPReputationChecker.DEFAULT_DNSBL_SERVERS, + highRiskThreshold: ReputationThreshold.HIGH_RISK, + mediumRiskThreshold: ReputationThreshold.MEDIUM_RISK, + lowRiskThreshold: ReputationThreshold.LOW_RISK, + enableLocalCache: true, + enableDNSBL: true, + enableIPInfo: true + }; + + /** + * Constructor for IPReputationChecker + * @param options Configuration options + */ + constructor(options: IIPReputationOptions = {}) { + // Merge with default options + this.options = { + ...IPReputationChecker.DEFAULT_OPTIONS, + ...options + }; + + // Initialize reputation cache + this.reputationCache = new LRUCache({ + max: this.options.maxCacheSize, + ttl: this.options.cacheTTL, // Cache TTL + }); + + // Load cache from disk if enabled + if (this.options.enableLocalCache) { + this.loadCache(); + } + } + + /** + * Get the singleton instance of the checker + * @param options Configuration options + * @returns Singleton instance + */ + public static getInstance(options: IIPReputationOptions = {}): IPReputationChecker { + if (!IPReputationChecker.instance) { + IPReputationChecker.instance = new IPReputationChecker(options); + } + return IPReputationChecker.instance; + } + + /** + * Check an IP address's reputation + * @param ip IP address to check + * @returns Reputation check result + */ + public async checkReputation(ip: string): Promise { + try { + // Validate IP address format + if (!this.isValidIPAddress(ip)) { + logger.log('warn', `Invalid IP address format: ${ip}`); + return this.createErrorResult(ip, 'Invalid IP address format'); + } + + // Check cache first + const cachedResult = this.reputationCache.get(ip); + if (cachedResult) { + logger.log('info', `Using cached reputation data for IP ${ip}`, { + score: cachedResult.score, + isSpam: cachedResult.isSpam + }); + return cachedResult; + } + + // Initialize empty result + const result: IReputationResult = { + score: 100, // Start with perfect score + isSpam: false, + isProxy: false, + isTor: false, + isVPN: false, + timestamp: Date.now() + }; + + // Check IP against DNS blacklists if enabled + if (this.options.enableDNSBL) { + const dnsblResult = await this.checkDNSBL(ip); + + // Update result with DNSBL information + result.score -= dnsblResult.listCount * 10; // Subtract 10 points per blacklist + result.isSpam = dnsblResult.listCount > 0; + result.blacklists = dnsblResult.lists; + } + + // Get additional IP information if enabled + if (this.options.enableIPInfo) { + const ipInfo = await this.getIPInfo(ip); + + // Update result with IP info + result.country = ipInfo.country; + result.asn = ipInfo.asn; + result.org = ipInfo.org; + + // Adjust score based on IP type + if (ipInfo.type === IPType.PROXY || ipInfo.type === IPType.TOR || ipInfo.type === IPType.VPN) { + result.score -= 30; // Subtract 30 points for proxies, Tor, VPNs + + // Set proxy flags + result.isProxy = ipInfo.type === IPType.PROXY; + result.isTor = ipInfo.type === IPType.TOR; + result.isVPN = ipInfo.type === IPType.VPN; + } + } + + // Ensure score is between 0 and 100 + result.score = Math.max(0, Math.min(100, result.score)); + + // Update cache with result + this.reputationCache.set(ip, result); + + // Save cache if enabled + if (this.options.enableLocalCache) { + this.saveCache(); + } + + // Log the reputation check + this.logReputationCheck(ip, result); + + return result; + } catch (error) { + logger.log('error', `Error checking IP reputation for ${ip}: ${error.message}`, { + ip, + stack: error.stack + }); + + return this.createErrorResult(ip, error.message); + } + } + + /** + * Check an IP against DNS blacklists + * @param ip IP address to check + * @returns DNSBL check results + */ + private async checkDNSBL(ip: string): Promise<{ + listCount: number; + lists: string[]; + }> { + try { + // Reverse the IP for DNSBL queries + const reversedIP = this.reverseIP(ip); + + const results = await Promise.allSettled( + this.options.dnsblServers.map(async (server) => { + try { + const lookupDomain = `${reversedIP}.${server}`; + await plugins.dns.promises.resolve(lookupDomain); + return server; // IP is listed in this DNSBL + } catch (error) { + if (error.code === 'ENOTFOUND') { + return null; // IP is not listed in this DNSBL + } + throw error; // Other error + } + }) + ); + + // Extract successful lookups (listed in DNSBL) + const lists = results + .filter((result): result is PromiseFulfilledResult => + result.status === 'fulfilled' && result.value !== null + ) + .map(result => result.value); + + return { + listCount: lists.length, + lists + }; + } catch (error) { + logger.log('error', `Error checking DNSBL for ${ip}: ${error.message}`); + return { + listCount: 0, + lists: [] + }; + } + } + + /** + * Get information about an IP address + * @param ip IP address to check + * @returns IP information + */ + private async getIPInfo(ip: string): Promise<{ + country?: string; + asn?: string; + org?: string; + type: IPType; + }> { + try { + // In a real implementation, this would use an IP data service API + // For this implementation, we'll use a simplified approach + + // Check if it's a known Tor exit node (simplified) + const isTor = ip.startsWith('171.25.') || ip.startsWith('185.220.') || ip.startsWith('95.216.'); + + // Check if it's a known VPN (simplified) + const isVPN = ip.startsWith('185.156.') || ip.startsWith('37.120.'); + + // Check if it's a known proxy (simplified) + const isProxy = ip.startsWith('34.92.') || ip.startsWith('34.206.'); + + // Determine IP type + let type = IPType.UNKNOWN; + if (isTor) { + type = IPType.TOR; + } else if (isVPN) { + type = IPType.VPN; + } else if (isProxy) { + type = IPType.PROXY; + } else { + // Simple datacenters detection (major cloud providers) + if ( + ip.startsWith('13.') || // AWS + ip.startsWith('35.') || // Google Cloud + ip.startsWith('52.') || // AWS + ip.startsWith('34.') || // Google Cloud + ip.startsWith('104.') // Various providers + ) { + type = IPType.DATACENTER; + } else { + type = IPType.RESIDENTIAL; + } + } + + // Return the information + return { + country: this.determineCountry(ip), // Simplified, would use geolocation service + asn: 'AS12345', // Simplified, would look up real ASN + org: this.determineOrg(ip), // Simplified, would use real org data + type + }; + } catch (error) { + logger.log('error', `Error getting IP info for ${ip}: ${error.message}`); + return { + type: IPType.UNKNOWN + }; + } + } + + /** + * Simplified method to determine country from IP + * In a real implementation, this would use a geolocation database or service + * @param ip IP address + * @returns Country code + */ + private determineCountry(ip: string): string { + // Simplified mapping for demo purposes + if (ip.startsWith('13.') || ip.startsWith('52.')) return 'US'; + if (ip.startsWith('35.') || ip.startsWith('34.')) return 'US'; + if (ip.startsWith('185.')) return 'NL'; + if (ip.startsWith('171.')) return 'DE'; + return 'XX'; // Unknown + } + + /** + * Simplified method to determine organization from IP + * In a real implementation, this would use an IP-to-org database or service + * @param ip IP address + * @returns Organization name + */ + private determineOrg(ip: string): string { + // Simplified mapping for demo purposes + if (ip.startsWith('13.') || ip.startsWith('52.')) return 'Amazon AWS'; + if (ip.startsWith('35.') || ip.startsWith('34.')) return 'Google Cloud'; + if (ip.startsWith('185.156.')) return 'NordVPN'; + if (ip.startsWith('37.120.')) return 'ExpressVPN'; + if (ip.startsWith('185.220.')) return 'Tor Exit Node'; + return 'Unknown'; + } + + /** + * Reverse an IP address for DNSBL lookups (e.g., 1.2.3.4 -> 4.3.2.1) + * @param ip IP address to reverse + * @returns Reversed IP for DNSBL queries + */ + private reverseIP(ip: string): string { + return ip.split('.').reverse().join('.'); + } + + /** + * Create an error result for when reputation check fails + * @param ip IP address + * @param errorMessage Error message + * @returns Error result + */ + private createErrorResult(ip: string, errorMessage: string): IReputationResult { + return { + score: 50, // Neutral score for errors + isSpam: false, + isProxy: false, + isTor: false, + isVPN: false, + timestamp: Date.now(), + error: errorMessage + }; + } + + /** + * Validate IP address format + * @param ip IP address to validate + * @returns Whether the IP is valid + */ + private isValidIPAddress(ip: string): boolean { + // IPv4 regex pattern + const ipv4Pattern = /^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/; + return ipv4Pattern.test(ip); + } + + /** + * Log reputation check to security logger + * @param ip IP address + * @param result Reputation result + */ + private logReputationCheck(ip: string, result: IReputationResult): void { + // Determine log level based on reputation score + let logLevel = SecurityLogLevel.INFO; + if (result.score < this.options.highRiskThreshold) { + logLevel = SecurityLogLevel.WARN; + } else if (result.score < this.options.mediumRiskThreshold) { + logLevel = SecurityLogLevel.INFO; + } + + // Log the check + SecurityLogger.getInstance().logEvent({ + level: logLevel, + type: SecurityEventType.IP_REPUTATION, + message: `IP reputation check ${result.isSpam ? 'flagged spam' : 'completed'} for ${ip}`, + ipAddress: ip, + details: { + score: result.score, + isSpam: result.isSpam, + isProxy: result.isProxy, + isTor: result.isTor, + isVPN: result.isVPN, + country: result.country, + blacklists: result.blacklists + }, + success: !result.isSpam + }); + } + + /** + * Save cache to disk + */ + private saveCache(): void { + try { + // Convert cache entries to serializable array + const entries = Array.from(this.reputationCache.entries()).map(([ip, data]) => ({ + ip, + data + })); + + // Only save if we have entries + if (entries.length === 0) { + return; + } + + // Ensure directory exists + const cacheDir = plugins.path.join(paths.dataDir, 'security'); + plugins.smartfile.fs.ensureDirSync(cacheDir); + + // Save to file + const cacheFile = plugins.path.join(cacheDir, 'ip_reputation_cache.json'); + plugins.smartfile.memory.toFsSync( + JSON.stringify(entries), + cacheFile + ); + + logger.log('info', `Saved ${entries.length} IP reputation cache entries to disk`); + } catch (error) { + logger.log('error', `Failed to save IP reputation cache: ${error.message}`); + } + } + + /** + * Load cache from disk + */ + private loadCache(): void { + try { + const cacheFile = plugins.path.join(paths.dataDir, 'security', 'ip_reputation_cache.json'); + + // Check if file exists + if (!plugins.fs.existsSync(cacheFile)) { + return; + } + + // Read and parse cache + const cacheData = plugins.fs.readFileSync(cacheFile, 'utf8'); + const entries = JSON.parse(cacheData); + + // Validate and filter entries + const now = Date.now(); + const validEntries = entries.filter(entry => { + const age = now - entry.data.timestamp; + return age < this.options.cacheTTL; // Only load entries that haven't expired + }); + + // Restore cache + for (const entry of validEntries) { + this.reputationCache.set(entry.ip, entry.data); + } + + logger.log('info', `Loaded ${validEntries.length} IP reputation cache entries from disk`); + } catch (error) { + logger.log('error', `Failed to load IP reputation cache: ${error.message}`); + } + } + + /** + * Get the risk level for a reputation score + * @param score Reputation score (0-100) + * @returns Risk level description + */ + public static getRiskLevel(score: number): 'high' | 'medium' | 'low' | 'trusted' { + if (score < ReputationThreshold.HIGH_RISK) { + return 'high'; + } else if (score < ReputationThreshold.MEDIUM_RISK) { + return 'medium'; + } else if (score < ReputationThreshold.LOW_RISK) { + return 'low'; + } else { + return 'trusted'; + } + } +} \ No newline at end of file diff --git a/ts/security/classes.securitylogger.ts b/ts/security/classes.securitylogger.ts new file mode 100644 index 0000000..a304c7e --- /dev/null +++ b/ts/security/classes.securitylogger.ts @@ -0,0 +1,294 @@ +import * as plugins from '../plugins.js'; +import { logger } from '../logger.js'; + +/** + * Log level for security events + */ +export enum SecurityLogLevel { + INFO = 'info', + WARN = 'warn', + ERROR = 'error', + CRITICAL = 'critical' +} + +/** + * Security event types for categorization + */ +export enum SecurityEventType { + AUTHENTICATION = 'authentication', + ACCESS_CONTROL = 'access_control', + EMAIL_VALIDATION = 'email_validation', + DKIM = 'dkim', + SPF = 'spf', + DMARC = 'dmarc', + RATE_LIMIT = 'rate_limit', + SPAM = 'spam', + MALWARE = 'malware', + CONNECTION = 'connection', + DATA_EXPOSURE = 'data_exposure', + CONFIGURATION = 'configuration', + IP_REPUTATION = 'ip_reputation' +} + +/** + * Security event interface + */ +export interface ISecurityEvent { + timestamp: number; + level: SecurityLogLevel; + type: SecurityEventType; + message: string; + details?: any; + ipAddress?: string; + userId?: string; + sessionId?: string; + emailId?: string; + domain?: string; + action?: string; + result?: string; + success?: boolean; +} + +/** + * Security logger for enhanced security monitoring + */ +export class SecurityLogger { + private static instance: SecurityLogger; + private securityEvents: ISecurityEvent[] = []; + private maxEventHistory: number; + private enableNotifications: boolean; + + private constructor(options?: { + maxEventHistory?: number; + enableNotifications?: boolean; + }) { + this.maxEventHistory = options?.maxEventHistory || 1000; + this.enableNotifications = options?.enableNotifications || false; + } + + /** + * Get singleton instance + */ + public static getInstance(options?: { + maxEventHistory?: number; + enableNotifications?: boolean; + }): SecurityLogger { + if (!SecurityLogger.instance) { + SecurityLogger.instance = new SecurityLogger(options); + } + return SecurityLogger.instance; + } + + /** + * Log a security event + * @param event The security event to log + */ + public logEvent(event: Omit): void { + const fullEvent: ISecurityEvent = { + ...event, + timestamp: Date.now() + }; + + // Store in memory buffer + this.securityEvents.push(fullEvent); + + // Trim history if needed + if (this.securityEvents.length > this.maxEventHistory) { + this.securityEvents.shift(); + } + + // Log to regular logger with appropriate level + switch (event.level) { + case SecurityLogLevel.INFO: + logger.log('info', `[SECURITY:${event.type}] ${event.message}`, event.details); + break; + case SecurityLogLevel.WARN: + logger.log('warn', `[SECURITY:${event.type}] ${event.message}`, event.details); + break; + case SecurityLogLevel.ERROR: + case SecurityLogLevel.CRITICAL: + logger.log('error', `[SECURITY:${event.type}] ${event.message}`, event.details); + + // Send notification for critical events if enabled + if (event.level === SecurityLogLevel.CRITICAL && this.enableNotifications) { + this.sendNotification(fullEvent); + } + break; + } + } + + /** + * Get recent security events + * @param limit Maximum number of events to return + * @param filter Filter for specific event types + * @returns Recent security events + */ + public getRecentEvents(limit: number = 100, filter?: { + level?: SecurityLogLevel; + type?: SecurityEventType; + fromTimestamp?: number; + toTimestamp?: number; + }): ISecurityEvent[] { + let filteredEvents = this.securityEvents; + + // Apply filters + if (filter) { + if (filter.level) { + filteredEvents = filteredEvents.filter(event => event.level === filter.level); + } + + if (filter.type) { + filteredEvents = filteredEvents.filter(event => event.type === filter.type); + } + + if (filter.fromTimestamp) { + filteredEvents = filteredEvents.filter(event => event.timestamp >= filter.fromTimestamp); + } + + if (filter.toTimestamp) { + filteredEvents = filteredEvents.filter(event => event.timestamp <= filter.toTimestamp); + } + } + + // Return most recent events up to limit + return filteredEvents + .sort((a, b) => b.timestamp - a.timestamp) + .slice(0, limit); + } + + /** + * Get events by security level + * @param level The security level to filter by + * @param limit Maximum number of events to return + * @returns Security events matching the level + */ + public getEventsByLevel(level: SecurityLogLevel, limit: number = 100): ISecurityEvent[] { + return this.getRecentEvents(limit, { level }); + } + + /** + * Get events by security type + * @param type The event type to filter by + * @param limit Maximum number of events to return + * @returns Security events matching the type + */ + public getEventsByType(type: SecurityEventType, limit: number = 100): ISecurityEvent[] { + return this.getRecentEvents(limit, { type }); + } + + /** + * Get security events for a specific IP address + * @param ipAddress The IP address to filter by + * @param limit Maximum number of events to return + * @returns Security events for the IP address + */ + public getEventsByIP(ipAddress: string, limit: number = 100): ISecurityEvent[] { + return this.securityEvents + .filter(event => event.ipAddress === ipAddress) + .sort((a, b) => b.timestamp - a.timestamp) + .slice(0, limit); + } + + /** + * Get security events for a specific domain + * @param domain The domain to filter by + * @param limit Maximum number of events to return + * @returns Security events for the domain + */ + public getEventsByDomain(domain: string, limit: number = 100): ISecurityEvent[] { + return this.securityEvents + .filter(event => event.domain === domain) + .sort((a, b) => b.timestamp - a.timestamp) + .slice(0, limit); + } + + /** + * Send a notification for critical security events + * @param event The security event to notify about + * @private + */ + private sendNotification(event: ISecurityEvent): void { + // In a production environment, this would integrate with a notification service + // For now, we'll just log that we would send a notification + logger.log('error', `[SECURITY NOTIFICATION] ${event.message}`, { + ...event, + notificationSent: true + }); + + // Future integration with alerting systems would go here + } + + /** + * Clear event history + */ + public clearEvents(): void { + this.securityEvents = []; + } + + /** + * Get statistical summary of security events + * @param timeWindow Optional time window in milliseconds + * @returns Summary of security events + */ + public getEventsSummary(timeWindow?: number): { + total: number; + byLevel: Record; + byType: Record; + topIPs: Array<{ ip: string; count: number }>; + topDomains: Array<{ domain: string; count: number }>; + } { + // Filter by time window if provided + let events = this.securityEvents; + if (timeWindow) { + const cutoff = Date.now() - timeWindow; + events = events.filter(e => e.timestamp >= cutoff); + } + + // Count by level + const byLevel = Object.values(SecurityLogLevel).reduce((acc, level) => { + acc[level] = events.filter(e => e.level === level).length; + return acc; + }, {} as Record); + + // Count by type + const byType = Object.values(SecurityEventType).reduce((acc, type) => { + acc[type] = events.filter(e => e.type === type).length; + return acc; + }, {} as Record); + + // Count by IP + const ipCounts = new Map(); + events.forEach(e => { + if (e.ipAddress) { + ipCounts.set(e.ipAddress, (ipCounts.get(e.ipAddress) || 0) + 1); + } + }); + + // Count by domain + const domainCounts = new Map(); + events.forEach(e => { + if (e.domain) { + domainCounts.set(e.domain, (domainCounts.get(e.domain) || 0) + 1); + } + }); + + // Sort and limit top entries + const topIPs = Array.from(ipCounts.entries()) + .map(([ip, count]) => ({ ip, count })) + .sort((a, b) => b.count - a.count) + .slice(0, 10); + + const topDomains = Array.from(domainCounts.entries()) + .map(([domain, count]) => ({ domain, count })) + .sort((a, b) => b.count - a.count) + .slice(0, 10); + + return { + total: events.length, + byLevel, + byType, + topIPs, + topDomains + }; + } +} \ No newline at end of file diff --git a/ts/security/index.ts b/ts/security/index.ts new file mode 100644 index 0000000..2f99b6b --- /dev/null +++ b/ts/security/index.ts @@ -0,0 +1,21 @@ +export { + SecurityLogger, + SecurityLogLevel, + SecurityEventType, + type ISecurityEvent +} from './classes.securitylogger.js'; + +export { + IPReputationChecker, + ReputationThreshold, + IPType, + type IReputationResult, + type IIPReputationOptions +} from './classes.ipreputationchecker.js'; + +export { + ContentScanner, + ThreatCategory, + type IScanResult, + type IContentScannerOptions +} from './classes.contentscanner.js'; \ No newline at end of file