563 lines
19 KiB
TypeScript
563 lines
19 KiB
TypeScript
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import * as plugins from '../../plugins.ts';
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import type { IEmailDomainConfig } from './interfaces.ts';
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import { logger } from '../../logger.ts';
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import type { DcRouter } from '../../classes.mailer.ts';
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import type { StorageManager } from '../../storage/index.ts';
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/**
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* DNS validation result
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*/
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export interface IDnsValidationResult {
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valid: boolean;
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errors: string[];
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warnings: string[];
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requiredChanges: string[];
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}
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/**
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* DNS records found for a domain
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*/
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interface IDnsRecords {
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mx?: string[];
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spf?: string;
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dkim?: string;
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dmarc?: string;
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ns?: string[];
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}
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/**
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* Manages DNS configuration for email domains
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* Handles both validation and creation of DNS records
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*/
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export class DnsManager {
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private dcRouter: DcRouter;
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private storageManager: StorageManager;
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constructor(dcRouter: DcRouter) {
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this.dcRouter = dcRouter;
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this.storageManager = dcRouter.storageManager;
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}
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/**
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* Validate all domain configurations
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*/
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async validateAllDomains(domainConfigs: IEmailDomainConfig[]): Promise<Map<string, IDnsValidationResult>> {
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const results = new Map<string, IDnsValidationResult>();
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for (const config of domainConfigs) {
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const result = await this.validateDomain(config);
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results.set(config.domain, result);
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}
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return results;
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}
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/**
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* Validate a single domain configuration
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*/
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async validateDomain(config: IEmailDomainConfig): Promise<IDnsValidationResult> {
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switch (config.dnsMode) {
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case 'forward':
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return this.validateForwardMode(config);
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case 'internal-dns':
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return this.validateInternalDnsMode(config);
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case 'external-dns':
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return this.validateExternalDnsMode(config);
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default:
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return {
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valid: false,
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errors: [`Unknown DNS mode: ${config.dnsMode}`],
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warnings: [],
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requiredChanges: []
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};
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}
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}
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/**
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* Validate forward mode configuration
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*/
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private async validateForwardMode(config: IEmailDomainConfig): Promise<IDnsValidationResult> {
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const result: IDnsValidationResult = {
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valid: true,
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errors: [],
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warnings: [],
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requiredChanges: []
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};
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// Forward mode doesn't require DNS validation by default
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if (!config.dns?.forward?.skipDnsValidation) {
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logger.log('info', `DNS validation skipped for forward mode domain: ${config.domain}`);
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}
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// DKIM keys are still generated for consistency
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result.warnings.push(
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`Domain "${config.domain}" uses forward mode. DKIM keys will be generated but signing only happens if email is processed.`
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);
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return result;
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}
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/**
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* Validate internal DNS mode configuration
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*/
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private async validateInternalDnsMode(config: IEmailDomainConfig): Promise<IDnsValidationResult> {
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const result: IDnsValidationResult = {
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valid: true,
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errors: [],
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warnings: [],
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requiredChanges: []
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};
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// Check if DNS configuration is set up
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const dnsNsDomains = this.dcRouter.options?.dnsNsDomains;
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const dnsScopes = this.dcRouter.options?.dnsScopes;
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if (!dnsNsDomains || dnsNsDomains.length === 0) {
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result.valid = false;
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result.errors.push(
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`Domain "${config.domain}" is configured to use internal DNS, but dnsNsDomains is not set in DcRouter configuration.`
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);
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console.error(
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`❌ ERROR: Domain "${config.domain}" is configured to use internal DNS,\n` +
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' but dnsNsDomains is not set in DcRouter configuration.\n' +
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' Please configure dnsNsDomains to enable the DNS server.\n' +
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' Example: dnsNsDomains: ["ns1.myservice.com", "ns2.myservice.com"]'
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);
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return result;
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}
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if (!dnsScopes || dnsScopes.length === 0) {
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result.valid = false;
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result.errors.push(
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`Domain "${config.domain}" is configured to use internal DNS, but dnsScopes is not set in DcRouter configuration.`
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);
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console.error(
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`❌ ERROR: Domain "${config.domain}" is configured to use internal DNS,\n` +
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' but dnsScopes is not set in DcRouter configuration.\n' +
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' Please configure dnsScopes to define authoritative domains.\n' +
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' Example: dnsScopes: ["myservice.com", "mail.myservice.com"]'
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);
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return result;
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}
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// Check if the email domain is in dnsScopes
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if (!dnsScopes.includes(config.domain)) {
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result.valid = false;
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result.errors.push(
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`Domain "${config.domain}" is configured to use internal DNS, but is not included in dnsScopes.`
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);
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console.error(
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`❌ ERROR: Domain "${config.domain}" is configured to use internal DNS,\n` +
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` but is not included in dnsScopes: [${dnsScopes.join(', ')}].\n` +
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' Please add this domain to dnsScopes to enable internal DNS.\n' +
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` Example: dnsScopes: [..., "${config.domain}"]`
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);
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return result;
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}
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const primaryNameserver = dnsNsDomains[0];
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// Check NS delegation
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try {
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const nsRecords = await this.resolveNs(config.domain);
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const delegatedNameservers = dnsNsDomains.filter(ns => nsRecords.includes(ns));
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const isDelegated = delegatedNameservers.length > 0;
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if (!isDelegated) {
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result.warnings.push(
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`NS delegation not found for ${config.domain}. Please add NS records at your registrar.`
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);
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dnsNsDomains.forEach(ns => {
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result.requiredChanges.push(
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`Add NS record: ${config.domain}. NS ${ns}.`
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);
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});
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console.log(
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`📋 DNS Delegation Required for ${config.domain}:\n` +
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'━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n' +
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'Please add these NS records at your domain registrar:\n' +
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dnsNsDomains.map(ns => ` ${config.domain}. NS ${ns}.`).join('\n') + '\n' +
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'━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n' +
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'This delegation is required for internal DNS mode to work.'
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);
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} else {
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console.log(
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`✅ NS delegation verified: ${config.domain} -> [${delegatedNameservers.join(', ')}]`
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);
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}
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} catch (error) {
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result.warnings.push(
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`Could not verify NS delegation for ${config.domain}: ${error.message}`
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);
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}
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return result;
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}
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/**
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* Validate external DNS mode configuration
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*/
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private async validateExternalDnsMode(config: IEmailDomainConfig): Promise<IDnsValidationResult> {
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const result: IDnsValidationResult = {
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valid: true,
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errors: [],
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warnings: [],
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requiredChanges: []
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};
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try {
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// Get current DNS records
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const records = await this.checkDnsRecords(config);
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const requiredRecords = config.dns?.external?.requiredRecords || ['MX', 'SPF', 'DKIM', 'DMARC'];
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// Check MX record
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if (requiredRecords.includes('MX') && !records.mx?.length) {
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result.requiredChanges.push(
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`Add MX record: ${this.getBaseDomain(config.domain)} -> ${config.domain} (priority 10)`
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);
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}
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// Check SPF record
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if (requiredRecords.includes('SPF') && !records.spf) {
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result.requiredChanges.push(
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`Add TXT record: ${this.getBaseDomain(config.domain)} -> "v=spf1 a mx ~all"`
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);
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}
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// Check DKIM record
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if (requiredRecords.includes('DKIM') && !records.dkim) {
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const selector = config.dkim?.selector || 'default';
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const dkimPublicKey = await this.storageManager.get(`/email/dkim/${config.domain}/public.key`);
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if (dkimPublicKey) {
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const publicKeyBase64 = dkimPublicKey
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.replace(/-----BEGIN PUBLIC KEY-----/g, '')
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.replace(/-----END PUBLIC KEY-----/g, '')
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.replace(/\s/g, '');
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result.requiredChanges.push(
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`Add TXT record: ${selector}._domainkey.${config.domain} -> "v=DKIM1; k=rsa; p=${publicKeyBase64}"`
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);
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} else {
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result.warnings.push(
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`DKIM public key not found for ${config.domain}. It will be generated on first use.`
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);
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}
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}
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// Check DMARC record
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if (requiredRecords.includes('DMARC') && !records.dmarc) {
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result.requiredChanges.push(
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`Add TXT record: _dmarc.${this.getBaseDomain(config.domain)} -> "v=DMARC1; p=none; rua=mailto:dmarc@${config.domain}"`
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);
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}
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// Show setup instructions if needed
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if (result.requiredChanges.length > 0) {
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console.log(
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`📋 DNS Configuration Required for ${config.domain}:\n` +
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'━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n' +
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result.requiredChanges.map((change, i) => `${i + 1}. ${change}`).join('\n') +
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'\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━'
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);
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}
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} catch (error) {
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result.errors.push(`DNS validation failed: ${error.message}`);
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result.valid = false;
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}
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return result;
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}
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/**
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* Check DNS records for a domain
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*/
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private async checkDnsRecords(config: IEmailDomainConfig): Promise<IDnsRecords> {
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const records: IDnsRecords = {};
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const baseDomain = this.getBaseDomain(config.domain);
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const selector = config.dkim?.selector || 'default';
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// Use custom DNS servers if specified
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const resolver = new plugins.dns.promises.Resolver();
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if (config.dns?.external?.servers?.length) {
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resolver.setServers(config.dns.external.servers);
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}
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// Check MX records
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try {
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const mxRecords = await resolver.resolveMx(baseDomain);
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records.mx = mxRecords.map(mx => mx.exchange);
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} catch (error) {
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logger.log('debug', `No MX records found for ${baseDomain}`);
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}
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// Check SPF record
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try {
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const txtRecords = await resolver.resolveTxt(baseDomain);
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const spfRecord = txtRecords.find(records =>
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records.some(record => record.startsWith('v=spf1'))
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);
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if (spfRecord) {
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records.spf = spfRecord.join('');
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}
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} catch (error) {
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logger.log('debug', `No SPF record found for ${baseDomain}`);
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}
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// Check DKIM record
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try {
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const dkimRecords = await resolver.resolveTxt(`${selector}._domainkey.${config.domain}`);
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const dkimRecord = dkimRecords.find(records =>
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records.some(record => record.includes('v=DKIM1'))
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);
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if (dkimRecord) {
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records.dkim = dkimRecord.join('');
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}
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} catch (error) {
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logger.log('debug', `No DKIM record found for ${selector}._domainkey.${config.domain}`);
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}
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// Check DMARC record
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try {
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const dmarcRecords = await resolver.resolveTxt(`_dmarc.${baseDomain}`);
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const dmarcRecord = dmarcRecords.find(records =>
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records.some(record => record.startsWith('v=DMARC1'))
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);
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if (dmarcRecord) {
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records.dmarc = dmarcRecord.join('');
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}
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} catch (error) {
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logger.log('debug', `No DMARC record found for _dmarc.${baseDomain}`);
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}
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return records;
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}
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/**
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* Resolve NS records for a domain
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*/
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private async resolveNs(domain: string): Promise<string[]> {
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try {
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const resolver = new plugins.dns.promises.Resolver();
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const nsRecords = await resolver.resolveNs(domain);
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return nsRecords;
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} catch (error) {
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logger.log('warn', `Failed to resolve NS records for ${domain}: ${error.message}`);
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return [];
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}
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}
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/**
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* Get base domain from email domain (e.g., mail.example.com -> example.com)
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*/
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private getBaseDomain(domain: string): string {
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const parts = domain.split('.');
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if (parts.length <= 2) {
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return domain;
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}
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// For subdomains like mail.example.com, return example.com
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// But preserve domain structure for longer TLDs like .co.uk
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if (parts[parts.length - 2].length <= 3 && parts[parts.length - 1].length === 2) {
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|
// Likely a country code TLD like .co.uk
|
||
|
|
return parts.slice(-3).join('.');
|
||
|
|
}
|
||
|
|
|
||
|
|
return parts.slice(-2).join('.');
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Ensure all DNS records are created for configured domains
|
||
|
|
* This is the main entry point for DNS record management
|
||
|
|
*/
|
||
|
|
async ensureDnsRecords(domainConfigs: IEmailDomainConfig[], dkimCreator?: any): Promise<void> {
|
||
|
|
logger.log('info', `Ensuring DNS records for ${domainConfigs.length} domains`);
|
||
|
|
|
||
|
|
// First, validate all domains
|
||
|
|
const validationResults = await this.validateAllDomains(domainConfigs);
|
||
|
|
|
||
|
|
// Then create records for internal-dns domains
|
||
|
|
const internalDnsDomains = domainConfigs.filter(config => config.dnsMode === 'internal-dns');
|
||
|
|
if (internalDnsDomains.length > 0) {
|
||
|
|
await this.createInternalDnsRecords(internalDnsDomains);
|
||
|
|
|
||
|
|
// Create DKIM records if DKIMCreator is provided
|
||
|
|
if (dkimCreator) {
|
||
|
|
await this.createDkimRecords(domainConfigs, dkimCreator);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Log validation results for external-dns domains
|
||
|
|
for (const [domain, result] of validationResults) {
|
||
|
|
const config = domainConfigs.find(c => c.domain === domain);
|
||
|
|
if (config?.dnsMode === 'external-dns' && result.requiredChanges.length > 0) {
|
||
|
|
logger.log('warn', `External DNS configuration required for ${domain}`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create DNS records for internal-dns mode domains
|
||
|
|
*/
|
||
|
|
private async createInternalDnsRecords(domainConfigs: IEmailDomainConfig[]): Promise<void> {
|
||
|
|
// Check if DNS server is available
|
||
|
|
if (!this.dcRouter.dnsServer) {
|
||
|
|
logger.log('warn', 'DNS server not available, skipping internal DNS record creation');
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
logger.log('info', `Creating DNS records for ${domainConfigs.length} internal-dns domains`);
|
||
|
|
|
||
|
|
for (const domainConfig of domainConfigs) {
|
||
|
|
const domain = domainConfig.domain;
|
||
|
|
const ttl = domainConfig.dns?.internal?.ttl || 3600;
|
||
|
|
const mxPriority = domainConfig.dns?.internal?.mxPriority || 10;
|
||
|
|
|
||
|
|
try {
|
||
|
|
// 1. Register MX record - points to the email domain itself
|
||
|
|
this.dcRouter.dnsServer.registerHandler(
|
||
|
|
domain,
|
||
|
|
['MX'],
|
||
|
|
() => ({
|
||
|
|
name: domain,
|
||
|
|
type: 'MX',
|
||
|
|
class: 'IN',
|
||
|
|
ttl: ttl,
|
||
|
|
data: {
|
||
|
|
priority: mxPriority,
|
||
|
|
exchange: domain
|
||
|
|
}
|
||
|
|
})
|
||
|
|
);
|
||
|
|
logger.log('info', `MX record registered for ${domain} -> ${domain} (priority ${mxPriority})`);
|
||
|
|
|
||
|
|
// Store MX record in StorageManager
|
||
|
|
await this.storageManager.set(
|
||
|
|
`/email/dns/${domain}/mx`,
|
||
|
|
JSON.stringify({
|
||
|
|
type: 'MX',
|
||
|
|
priority: mxPriority,
|
||
|
|
exchange: domain,
|
||
|
|
ttl: ttl
|
||
|
|
})
|
||
|
|
);
|
||
|
|
|
||
|
|
// 2. Register SPF record - allows the domain to send emails
|
||
|
|
const spfRecord = `v=spf1 a mx ~all`;
|
||
|
|
this.dcRouter.dnsServer.registerHandler(
|
||
|
|
domain,
|
||
|
|
['TXT'],
|
||
|
|
() => ({
|
||
|
|
name: domain,
|
||
|
|
type: 'TXT',
|
||
|
|
class: 'IN',
|
||
|
|
ttl: ttl,
|
||
|
|
data: spfRecord
|
||
|
|
})
|
||
|
|
);
|
||
|
|
logger.log('info', `SPF record registered for ${domain}: "${spfRecord}"`);
|
||
|
|
|
||
|
|
// Store SPF record in StorageManager
|
||
|
|
await this.storageManager.set(
|
||
|
|
`/email/dns/${domain}/spf`,
|
||
|
|
JSON.stringify({
|
||
|
|
type: 'TXT',
|
||
|
|
data: spfRecord,
|
||
|
|
ttl: ttl
|
||
|
|
})
|
||
|
|
);
|
||
|
|
|
||
|
|
// 3. Register DMARC record - policy for handling email authentication
|
||
|
|
const dmarcRecord = `v=DMARC1; p=none; rua=mailto:dmarc@${domain}`;
|
||
|
|
this.dcRouter.dnsServer.registerHandler(
|
||
|
|
`_dmarc.${domain}`,
|
||
|
|
['TXT'],
|
||
|
|
() => ({
|
||
|
|
name: `_dmarc.${domain}`,
|
||
|
|
type: 'TXT',
|
||
|
|
class: 'IN',
|
||
|
|
ttl: ttl,
|
||
|
|
data: dmarcRecord
|
||
|
|
})
|
||
|
|
);
|
||
|
|
logger.log('info', `DMARC record registered for _dmarc.${domain}: "${dmarcRecord}"`);
|
||
|
|
|
||
|
|
// Store DMARC record in StorageManager
|
||
|
|
await this.storageManager.set(
|
||
|
|
`/email/dns/${domain}/dmarc`,
|
||
|
|
JSON.stringify({
|
||
|
|
type: 'TXT',
|
||
|
|
name: `_dmarc.${domain}`,
|
||
|
|
data: dmarcRecord,
|
||
|
|
ttl: ttl
|
||
|
|
})
|
||
|
|
);
|
||
|
|
|
||
|
|
// Log summary of DNS records created
|
||
|
|
logger.log('info', `✅ DNS records created for ${domain}:
|
||
|
|
- MX: ${domain} (priority ${mxPriority})
|
||
|
|
- SPF: ${spfRecord}
|
||
|
|
- DMARC: ${dmarcRecord}
|
||
|
|
- DKIM: Will be created when keys are generated`);
|
||
|
|
|
||
|
|
} catch (error) {
|
||
|
|
logger.log('error', `Failed to create DNS records for ${domain}: ${error.message}`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create DKIM DNS records for all domains
|
||
|
|
*/
|
||
|
|
private async createDkimRecords(domainConfigs: IEmailDomainConfig[], dkimCreator: any): Promise<void> {
|
||
|
|
for (const domainConfig of domainConfigs) {
|
||
|
|
const domain = domainConfig.domain;
|
||
|
|
const selector = domainConfig.dkim?.selector || 'default';
|
||
|
|
|
||
|
|
try {
|
||
|
|
// Get DKIM DNS record from DKIMCreator
|
||
|
|
const dnsRecord = await dkimCreator.getDNSRecordForDomain(domain);
|
||
|
|
|
||
|
|
// For internal-dns domains, register the DNS handler
|
||
|
|
if (domainConfig.dnsMode === 'internal-dns' && this.dcRouter.dnsServer) {
|
||
|
|
const ttl = domainConfig.dns?.internal?.ttl || 3600;
|
||
|
|
|
||
|
|
this.dcRouter.dnsServer.registerHandler(
|
||
|
|
`${selector}._domainkey.${domain}`,
|
||
|
|
['TXT'],
|
||
|
|
() => ({
|
||
|
|
name: `${selector}._domainkey.${domain}`,
|
||
|
|
type: 'TXT',
|
||
|
|
class: 'IN',
|
||
|
|
ttl: ttl,
|
||
|
|
data: dnsRecord.value
|
||
|
|
})
|
||
|
|
);
|
||
|
|
|
||
|
|
logger.log('info', `DKIM DNS record registered for ${selector}._domainkey.${domain}`);
|
||
|
|
|
||
|
|
// Store DKIM record in StorageManager
|
||
|
|
await this.storageManager.set(
|
||
|
|
`/email/dns/${domain}/dkim`,
|
||
|
|
JSON.stringify({
|
||
|
|
type: 'TXT',
|
||
|
|
name: `${selector}._domainkey.${domain}`,
|
||
|
|
data: dnsRecord.value,
|
||
|
|
ttl: ttl
|
||
|
|
})
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
// For external-dns domains, just log what should be configured
|
||
|
|
if (domainConfig.dnsMode === 'external-dns') {
|
||
|
|
logger.log('info', `DKIM record for external DNS: ${dnsRecord.name} -> "${dnsRecord.value}"`);
|
||
|
|
}
|
||
|
|
|
||
|
|
} catch (error) {
|
||
|
|
logger.log('warn', `Could not create DKIM DNS record for ${domain}: ${error.message}`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|