v4.1.1

fix(readme): clarify architecture and IPC, document outbound flow and testing, and update module and crate descriptions in README
v4.1.0
2026-02-11 07:36:54 +00:00 · 2026-02-11 07:36:54 +00:00 · 2026-02-11 07:31:08 +00:00 · 2026-02-11 07:31:08 +00:00
8 changed files with 945 additions and 190 deletions
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,22 @@
 # Changelog

+## 2026-02-11 - 4.1.1 - fix(readme)
+clarify architecture and IPC, document outbound flow and testing, and update module and crate descriptions in README
+
+- Changed IPC description to JSON-over-stdin/stdout (clarifies communication format between Rust and TypeScript)
+- Added Rust SMTP client entry and documented outbound mail data flow (TypeScript -> Rust signing/delivery -> result back)
+- Expanded testing instructions with commands for building Rust binary and running unit/E2E tests
+- Updated architecture diagram labels and Rust crate/module descriptions (mailer-smtp now includes client; test counts noted)
+- Documentation-only changes; no source code behavior modified
+
+## 2026-02-11 - 4.1.0 - feat(e2e-tests)
+add Node.js end-to-end tests covering server lifecycle, inbound SMTP handling, outbound delivery and routing actions
+
+- Adds four end-to-end test files: test.e2e.server-lifecycle.node.ts, test.e2e.inbound-smtp.node.ts, test.e2e.outbound-delivery.node.ts, test.e2e.routing-actions.node.ts
+- Tests exercise UnifiedEmailServer start/stop, SMTP handshake and transactions, outbound delivery via a mock SMTP server, routing actions (process, deliver, reject, forward), concurrency, and RSET handling mid-session
+- Introduces a minimal mock SMTP server to avoid IPC deadlock with the Rust SMTP client during outbound delivery tests
+- Tests will skip when the Rust bridge or server cannot start (binary build required)
+
 ## 2026-02-11 - 4.0.0 - BREAKING CHANGE(smtp-client)
 Replace the legacy TypeScript SMTP client with a new Rust-based SMTP client and IPC bridge for outbound delivery

--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@push.rocks/smartmta",
-  "version": "4.0.0",
+  "version": "4.1.1",
  "description": "A high-performance, enterprise-grade Mail Transfer Agent (MTA) built from scratch in TypeScript with Rust acceleration.",
  "keywords": [
    "mta",
--- a/readme.md
+++ b/readme.md
@@ -18,14 +18,14 @@ After installation, run `pnpm build` to compile the Rust binary (`mailer-bin`).

 ## Overview

-`@push.rocks/smartmta` is a **complete mail server solution** — SMTP server, SMTP client, email security, content scanning, and delivery management — all built with a custom SMTP implementation. The SMTP server itself runs as a Rust binary for maximum performance, communicating with the TypeScript orchestration layer via IPC.
+`@push.rocks/smartmta` is a **complete mail server solution** — SMTP server, SMTP client, email security, content scanning, and delivery management — all built with a custom SMTP implementation. The SMTP engine runs as a Rust binary for maximum performance, communicating with the TypeScript orchestration layer via JSON-over-stdin/stdout IPC.

 ### ⚡ What's Inside

 | Module | What It Does |
 |---|---|
-| **Rust SMTP Server** | High-performance SMTP engine written in Rust — TCP/TLS listener, STARTTLS, AUTH, pipelining, per-connection rate limiting |
-| **SMTP Client** | Outbound delivery with connection pooling, retry logic, TLS negotiation |
+| **Rust SMTP Server** | High-performance SMTP engine in Rust — TCP/TLS listener, STARTTLS, AUTH, pipelining, per-connection rate limiting |
+| **Rust SMTP Client** | Outbound delivery with connection pooling, retry logic, TLS negotiation, DKIM signing — all in Rust |
 | **DKIM** | Key generation, signing, and verification — per domain, with automatic rotation |
 | **SPF** | Full SPF record validation via Rust |
 | **DMARC** | Policy enforcement and verification |
@@ -37,8 +37,7 @@ After installation, run `pnpm build` to compile the Rust binary (`mailer-bin`).
 | **Delivery Queue** | Persistent queue with exponential backoff retry |
 | **Template Engine** | Email templates with variable substitution |
 | **Domain Registry** | Multi-domain management with per-domain configuration |
-| **DNS Manager** | Automatic DNS record management with Cloudflare API integration |
-| **Rust Security Bridge** | All security ops (DKIM+SPF+DMARC+DNSBL+content scanning) run in Rust via IPC |
+| **DNS Manager** | Automatic DNS record management (MX, SPF, DKIM, DMARC) |

 ### 🏗️ Architecture

@@ -52,9 +51,9 @@ After installation, run `pnpm build` to compile the Rust binary (`mailer-bin`).
 │  ┌──────┐ │ ┌───────┐ │ ┌──────────┐ │  ┌────────────────┐  │
 │  │Match │ │ │ DKIM  │ │ │ Queue    │ │  │ DomainRegistry │  │
 │  │Route │ │ │ SPF   │ │ │ Rate Lim │ │  │ DnsManager     │  │
-│  │ Act  │ │ │ DMARC │ │ │ SMTP Cli │ │  │ DKIMCreator    │  │
-│  └──────┘ │ │ IPRep │ │ │ Retry    │ │  │ Templates      │  │
-│           │ │ Scan  │ │ └──────────┘ │  └────────────────┘  │
+│  │ Act  │ │ │ DMARC │ │ │ Retry    │ │  │ DKIMCreator    │  │
+│  └──────┘ │ │ IPRep │ │ └──────────┘ │  │ Templates      │  │
+│           │ │ Scan  │ │              │  └────────────────┘  │
 │           │ └───────┘ │              │                       │
 ├───────────┴───────────┴──────────────┴───────────────────────┤
 │              Rust Security Bridge (smartrust IPC)             │
@@ -63,18 +62,25 @@ After installation, run `pnpm build` to compile the Rust binary (`mailer-bin`).
 │  ┌──────────────┐  ┌───────────────┐  ┌──────────────────┐  │
 │  │ mailer-smtp  │  │mailer-security│  │   mailer-core    │  │
 │  │ SMTP Server  │  │DKIM/SPF/DMARC │  │ Types/Validation │  │
-│  │ TLS/AUTH     │  │IP Rep/Content │  │ MIME/Bounce      │  │
+│  │ SMTP Client  │  │IP Rep/Content │  │ MIME/Bounce      │  │
+│  │ TLS/AUTH     │  │   Scanning    │  │   Detection      │  │
 │  └──────────────┘  └───────────────┘  └──────────────────┘  │
 └──────────────────────────────────────────────────────────────┘
 ```

 **Data flow for inbound mail:**

-1. Rust SMTP server accepts the connection and handles the full SMTP protocol
-2. On `DATA` completion, Rust runs the security pipeline **in-process** (DKIM/SPF/DMARC verification, content scanning, IP reputation check) — zero IPC round-trips
-3. Rust emits an `emailReceived` event via IPC with pre-computed security results attached
-4. TypeScript processes the email (routing decisions using the pre-computed results, delivery)
-5. Rust sends the final SMTP response to the client
+1. 📨 Rust SMTP server accepts the connection and handles the full SMTP protocol
+2. 🔒 On `DATA` completion, Rust runs the security pipeline **in-process** (DKIM/SPF/DMARC verification, content scanning, IP reputation check) — zero IPC round-trips
+3. 📤 Rust emits an `emailReceived` event via IPC with pre-computed security results attached
+4. 🔀 TypeScript processes the email (routing decisions using the pre-computed results, delivery)
+5. ✅ Rust sends the final SMTP response to the client
+
+**Data flow for outbound mail:**
+
+1. 📝 TypeScript constructs the email and resolves DKIM keys for the sender domain
+2. 🦀 Sends to Rust via IPC — Rust builds the RFC 2822 message, signs with DKIM, and delivers via its SMTP client with connection pooling
+3. 📬 Result (accepted/rejected recipients, server response) returned to TypeScript

 ## Usage

@@ -163,32 +169,19 @@ await emailServer.start();

 > 🔒 **Note:** `start()` will throw if the Rust binary is not compiled. Run `pnpm build` first.

-### 📧 Sending Emails with the SMTP Client
+### 📧 Sending Outbound Emails

-Create and send emails using the built-in SMTP client with connection pooling:
+All outbound email delivery goes through the Rust SMTP client, accessed via `UnifiedEmailServer.sendOutboundEmail()`. The Rust client handles connection pooling, TLS negotiation, and DKIM signing automatically:

 ```typescript
-import { Email, Delivery } from '@push.rocks/smartmta';
-
-// Create a client with connection pooling
-const client = Delivery.smtpClientMod.createSmtpClient({
-  host: 'smtp.example.com',
-  port: 587,
-  secure: false,     // will upgrade via STARTTLS
-  pool: true,
-  maxConnections: 5,
-  auth: {
-    user: 'sender@example.com',
-    pass: 'your-password',
-  },
-});
+import { Email, UnifiedEmailServer } from '@push.rocks/smartmta';

 // Build an email
 const email = new Email({
  from: 'sender@example.com',
  to: ['recipient@example.com'],
  cc: ['cc@example.com'],
-  subject: 'Hello from smartmta!',
+  subject: 'Hello from smartmta! 🚀',
  text: 'Plain text body',
  html: '<h1>Hello!</h1><p>HTML body with <strong>formatting</strong></p>',
  priority: 'high',
@@ -201,32 +194,32 @@ const email = new Email({
  ],
 });

-// Send it
-const result = await client.sendMail(email);
-console.log(`Message sent: ${result.messageId}`);
+// Send via the Rust SMTP client (connection pooling, TLS, DKIM signing)
+const result = await emailServer.sendOutboundEmail('smtp.example.com', 587, email, {
+  auth: { user: 'sender@example.com', pass: 'your-password' },
+  dkimDomain: 'example.com',
+  dkimSelector: 'default',
+});
+
+console.log(`Accepted: ${result.accepted.join(', ')}`);
+console.log(`Response: ${result.response}`);
+// -> Accepted: recipient@example.com
+// -> Response: 2.0.0 Ok: queued
 ```

-Additional client factories are available:
+The `sendOutboundEmail` method:
+- 🔑 Automatically resolves DKIM keys from the `DKIMCreator` for the specified domain
+- 🔗 Uses connection pooling in Rust — reuses TCP/TLS connections across sends
+- ⏱️ Configurable connection and socket timeouts via `outbound` options on the server

-```typescript
-// Pooled client for high-throughput scenarios
-const pooled = Delivery.smtpClientMod.createPooledSmtpClient({ /* ... */ });
+### 🔑 DKIM Signing & Key Management

-// Optimized for bulk sending
-const bulk = Delivery.smtpClientMod.createBulkSmtpClient({ /* ... */ });
-
-// Optimized for transactional emails
-const transactional = Delivery.smtpClientMod.createTransactionalSmtpClient({ /* ... */ });
-```
-
-### 🔑 DKIM Signing
-
-DKIM key management is handled by `DKIMCreator`, which generates, stores, and rotates keys per domain. Signing is performed automatically by `UnifiedEmailServer` during outbound delivery:
+DKIM key management is handled by `DKIMCreator`, which generates, stores, and rotates keys per domain. Signing is performed automatically by the Rust SMTP client during outbound delivery:

 ```typescript
 import { DKIMCreator } from '@push.rocks/smartmta';

-const dkimCreator = new DKIMCreator('/path/to/keys');
+const dkimCreator = new DKIMCreator('/path/to/keys', storageManager);

 // Auto-generate keys if they don't exist
 await dkimCreator.handleDKIMKeysForDomain('example.com');
@@ -244,30 +237,34 @@ if (needsRotation) {
 }
 ```

-When `UnifiedEmailServer.start()` is called, DKIM signing is applied to all outbound mail automatically using the Rust security bridge's `signDkim()` method for maximum performance.
+When `UnifiedEmailServer.start()` is called:
+- DKIM keys are generated or loaded for every configured domain
+- Signing is applied to all outbound mail via the Rust security bridge
+- Key rotation is checked automatically based on your `rotationInterval` config

 ### 🛡️ Email Authentication (SPF, DKIM, DMARC)

-Verify incoming emails against all three authentication standards. All verification is powered by the Rust binary:
+All verification is powered by the Rust binary. For inbound mail, `UnifiedEmailServer` runs the full security pipeline **automatically** — DKIM, SPF, DMARC, content scanning, and IP reputation in a single Rust pass. Results are attached as headers (`Received-SPF`, `X-DKIM-Result`, `X-DMARC-Result`).
+
+You can also use the individual verifiers directly:

 ```typescript
 import { DKIMVerifier, SpfVerifier, DmarcVerifier } from '@push.rocks/smartmta';

-// SPF verification — first arg is an Email object
+// SPF verification
 const spfVerifier = new SpfVerifier();
 const spfResult = await spfVerifier.verify(email, senderIP, heloDomain);
-// -> { result: 'pass' | 'fail' | 'softfail' | 'neutral' | 'none' | 'temperror' | 'permerror',
-//      domain: string, ip: string }
+// -> { result: 'pass' | 'fail' | 'softfail' | 'neutral' | 'none', domain, ip }

-// DKIM verification — takes raw email content
+// DKIM verification
 const dkimVerifier = new DKIMVerifier();
 const dkimResult = await dkimVerifier.verify(rawEmailContent);
+// -> [{ is_valid: true, domain: 'example.com', selector: 'default', status: 'pass' }]

-// DMARC verification — first arg is an Email object
+// DMARC verification
 const dmarcVerifier = new DmarcVerifier();
 const dmarcResult = await dmarcVerifier.verify(email, spfResult, dkimResult);
-// -> { action: 'pass' | 'quarantine' | 'reject', hasDmarc: boolean,
-//      spfDomainAligned: boolean, dkimDomainAligned: boolean, ... }
+// -> { action: 'pass' | 'quarantine' | 'reject', policy, spfDomainAligned, dkimDomainAligned }
 ```

 ### 🔀 Email Routing
@@ -326,7 +323,16 @@ const router = new EmailRouter([
 const matchedRoute = await router.evaluateRoutes(emailContext);
 ```

-**Match criteria available:**
+#### Route Action Types
+
+| Action | Description |
+|---|---|
+| `forward` | Forward the email to another SMTP server via the Rust SMTP client |
+| `deliver` | Queue for local MTA delivery |
+| `process` | Queue for processing (with optional content scanning and DKIM signing) |
+| `reject` | Reject with a configurable SMTP error code and message |
+
+#### Match Criteria

 | Criterion | Description |
 |---|---|
@@ -339,52 +345,6 @@ const matchedRoute = await router.evaluateRoutes(emailContext);
 | `subject` | Subject line pattern (string or RegExp) |
 | `hasAttachments` | Filter by attachment presence |

-### 🔍 Content Scanning
-
-Built-in content scanner for detecting spam, phishing, malware, and other threats. Text pattern scanning runs in Rust for performance; binary attachment scanning (PE headers, VBA macros) runs in TypeScript:
-
-```typescript
-import { ContentScanner } from '@push.rocks/smartmta';
-
-const scanner = new ContentScanner({
-  scanSubject: true,
-  scanBody: true,
-  scanAttachments: true,
-  blockExecutables: true,
-  blockMacros: true,
-  minThreatScore: 30,
-  highThreatScore: 70,
-  customRules: [
-    {
-      pattern: /bitcoin.*wallet/i,
-      type: 'scam',
-      score: 80,
-      description: 'Cryptocurrency scam pattern',
-    },
-  ],
-});
-
-const result = await scanner.scanEmail(email);
-// -> { isClean: false, threatScore: 85, threatType: 'phishing', scannedElements: [...] }
-```
-
-### 🌐 IP Reputation Checking
-
-Check sender IP addresses against DNSBL blacklists and classify IP types. DNSBL lookups run in Rust:
-
-```typescript
-import { IPReputationChecker } from '@push.rocks/smartmta';
-
-const ipChecker = IPReputationChecker.getInstance({
-  enableDNSBL: true,
-  dnsblServers: ['zen.spamhaus.org', 'bl.spamcop.net'],
-  cacheTTL: 24 * 60 * 60 * 1000,  // 24 hours
-});
-
-const reputation = await ipChecker.checkReputation('192.168.1.1');
-// -> { score: 85, isSpam: false, isProxy: false, isTor: false, blacklists: [] }
-```
-
 ### ⏱️ Rate Limiting

 Hierarchical rate limiting to protect your server and maintain deliverability:
@@ -445,7 +405,7 @@ const bounce = await bounceManager.processSmtpFailure(
 // Check if an address is suppressed due to bounces
 const suppressed = bounceManager.isEmailSuppressed('recipient@example.com');

-// Manually manage the suppression list
+// Manage the suppression list
 bounceManager.addToSuppressionList('bad@example.com', 'repeated hard bounces');
 bounceManager.removeFromSuppressionList('recovered@example.com');
 ```
@@ -484,7 +444,7 @@ const email = await templates.createEmail('welcome', {

 ### 🌍 DNS Management

-DNS record management for email authentication is handled automatically by `UnifiedEmailServer`. When the server starts, it ensures MX, SPF, DKIM, and DMARC records are in place for all configured domains via the Cloudflare API:
+When `UnifiedEmailServer.start()` is called, it automatically ensures MX, SPF, DKIM, and DMARC records are in place for all configured domains:

 ```typescript
 const emailServer = new UnifiedEmailServer(dcRouterRef, {
@@ -506,99 +466,43 @@ const emailServer = new UnifiedEmailServer(dcRouterRef, {
 await emailServer.start();
 ```

-### 🦀 RustSecurityBridge
-
-The `RustSecurityBridge` is the singleton that manages the Rust binary process. It handles security verification, content scanning, bounce detection, and the SMTP server lifecycle — all via `@push.rocks/smartrust` IPC:
-
-```typescript
-import { RustSecurityBridge } from '@push.rocks/smartmta';
-
-const bridge = RustSecurityBridge.getInstance();
-await bridge.start();
-
-// Compound verification: DKIM + SPF + DMARC in a single IPC call
-const securityResult = await bridge.verifyEmail({
-  rawMessage: rawEmailString,
-  ip: '203.0.113.10',
-  heloDomain: 'sender.example.com',
-  mailFrom: 'user@example.com',
-});
-// -> { dkim: [...], spf: { result, explanation }, dmarc: { result, policy } }
-
-// Individual security operations
-const dkimResults = await bridge.verifyDkim(rawEmailString);
-const spfResult = await bridge.checkSpf({
-  ip: '203.0.113.10',
-  heloDomain: 'sender.example.com',
-  mailFrom: 'user@example.com',
-});
-const reputationResult = await bridge.checkIpReputation('203.0.113.10');
-
-// DKIM signing
-const signed = await bridge.signDkim({
-  email: rawEmailString,
-  domain: 'example.com',
-  selector: 'default',
-  privateKeyPem: privateKey,
-});
-
-// Content scanning
-const scanResult = await bridge.scanContent({
-  subject: 'Win a free iPhone!!!',
-  body: '<a href="http://phishing.example.com">Click here</a>',
-  from: 'scammer@evil.com',
-});
-
-// Bounce detection
-const bounceResult = await bridge.detectBounce({
-  subject: 'Delivery Status Notification (Failure)',
-  body: '550 5.1.1 User unknown',
-  from: 'mailer-daemon@example.com',
-});
-
-await bridge.stop();
-```
-
-> ⚠️ **Important:** The Rust bridge is **mandatory**. There are no TypeScript fallbacks. If the Rust binary is unavailable, `UnifiedEmailServer.start()` will throw an error.
-
 ## 🦀 Rust Acceleration Layer

-Performance-critical operations are implemented in Rust and communicate with the TypeScript runtime via `@push.rocks/smartrust` (JSON-over-stdin/stdout IPC). The Rust workspace lives at `rust/` with five crates:
+Performance-critical operations are implemented in Rust and communicate with the TypeScript runtime via `@push.rocks/smartrust` (JSON-over-stdin/stdout IPC). The Rust workspace lives at `rust/` with four crates:

 | Crate | Status | Purpose |
 |---|---|---|
 | `mailer-core` | ✅ Complete (26 tests) | Email types, validation, MIME building, bounce detection |
 | `mailer-security` | ✅ Complete (22 tests) | DKIM sign/verify, SPF, DMARC, IP reputation/DNSBL, content scanning |
-| `mailer-smtp` | ✅ Complete (77 tests) | Full SMTP protocol engine — TCP/TLS server, STARTTLS, AUTH, pipelining, in-process security pipeline, rate limiting |
-| `mailer-bin` | ✅ Complete | CLI + smartrust IPC bridge — security, content scanning, SMTP server lifecycle |
-| `mailer-napi` | 🔜 Planned | Native Node.js addon (N-API) |
+| `mailer-smtp` | ✅ Complete (106 tests) | Full SMTP protocol engine — TCP/TLS server + client, STARTTLS, AUTH, pipelining, connection pooling, in-process security pipeline |
+| `mailer-bin` | ✅ Complete | CLI + smartrust IPC bridge — wires everything together |

-### What Runs in Rust
+### What Runs Where

 | Operation | Runs In | Why |
 |---|---|---|
-| SMTP server (port listening, protocol, TLS) | Rust | Performance, memory safety, zero-copy parsing |
-| DKIM signing & verification | Rust | Crypto-heavy, benefits from native speed |
-| SPF validation | Rust | DNS lookups with async resolver |
-| DMARC policy checking | Rust | Integrates with SPF/DKIM results |
-| IP reputation / DNSBL | Rust | Parallel DNS queries |
-| Content scanning (text patterns) | Rust | Regex engine performance |
-| Bounce detection (pattern matching) | Rust | Regex engine performance |
-| Email validation & MIME building | Rust | Parsing performance |
-| Binary attachment scanning | TypeScript | Buffer data too large for IPC |
-| Email routing & orchestration | TypeScript | Business logic, flexibility |
-| Delivery queue & retry | TypeScript | State management, persistence |
-| Template rendering | TypeScript | String interpolation |
+| SMTP server (port listening, protocol, TLS) | 🦀 Rust | Performance, memory safety, zero-copy parsing |
+| SMTP client (outbound delivery, connection pooling) | 🦀 Rust | Connection management, TLS negotiation |
+| DKIM signing & verification | 🦀 Rust | Crypto-heavy, benefits from native speed |
+| SPF validation | 🦀 Rust | DNS lookups with async resolver |
+| DMARC policy checking | 🦀 Rust | Integrates with SPF/DKIM results |
+| IP reputation / DNSBL | 🦀 Rust | Parallel DNS queries |
+| Content scanning (text patterns) | 🦀 Rust | Regex engine performance |
+| Bounce detection (pattern matching) | 🦀 Rust | Regex engine performance |
+| Email validation & MIME building | 🦀 Rust | Parsing performance |
+| Email routing & orchestration | 🟦 TypeScript | Business logic, flexibility |
+| Delivery queue & retry | 🟦 TypeScript | State management, persistence |
+| Template rendering | 🟦 TypeScript | String interpolation |
+| Domain & DNS management | 🟦 TypeScript | API integrations |

-## Project Structure
+## 📁 Project Structure

 ```
 smartmta/
 ├── ts/                              # TypeScript source
 │   ├── mail/
 │   │   ├── core/                    # Email, EmailValidator, BounceManager, TemplateManager
-│   │   ├── delivery/                # DeliverySystem, Queue, RateLimiter
-│   │   │   └── smtpclient/          # SMTP client with connection pooling
+│   │   ├── delivery/                # DeliveryQueue, DeliverySystem, RateLimiter
 │   │   ├── routing/                 # UnifiedEmailServer, EmailRouter, DomainRegistry, DnsManager
 │   │   └── security/                # DKIMCreator, DKIMVerifier, SpfVerifier, DmarcVerifier
 │   └── security/                    # ContentScanner, IPReputationChecker, RustSecurityBridge
@@ -606,14 +510,56 @@ smartmta/
 │   └── crates/
 │       ├── mailer-core/             # Email types, validation, MIME, bounce detection
 │       ├── mailer-security/         # DKIM, SPF, DMARC, IP reputation, content scanning
-│       ├── mailer-smtp/             # Full SMTP server (TCP/TLS, state machine, rate limiting)
-│       ├── mailer-bin/              # CLI + smartrust IPC bridge
-│       └── mailer-napi/             # N-API addon (planned)
-├── test/                            # Test suite
+│       ├── mailer-smtp/             # Full SMTP server + client (TCP/TLS, rate limiting, pooling)
+│       └── mailer-bin/              # CLI + smartrust IPC bridge
+├── test/                            # Test suite (116 TypeScript + 154 Rust tests)
 ├── dist_ts/                         # Compiled TypeScript output
 └── dist_rust/                       # Compiled Rust binaries
 ```

+## 🧪 Testing
+
+The project has comprehensive test coverage with both unit and end-to-end tests:
+
+```bash
+# Build Rust binary first
+pnpm build
+
+# Run all tests
+pnpm test
+
+# Run specific test files
+tstest test/test.e2e.server-lifecycle.node.ts --verbose --timeout 60
+tstest test/test.e2e.inbound-smtp.node.ts --verbose --timeout 60
+tstest test/test.e2e.routing-actions.node.ts --verbose --timeout 60
+tstest test/test.e2e.outbound-delivery.node.ts --verbose --timeout 60
+```
+
+**E2E tests** exercise the full pipeline — starting `UnifiedEmailServer`, connecting via raw TCP sockets, sending SMTP transactions, verifying routing actions, and testing outbound delivery through a mock SMTP receiver.
+
+## API Reference
+
+### Exported Classes (top-level)
+
+| Class | Description |
+|---|---|
+| `UnifiedEmailServer` | 🎯 Main entry point — orchestrates SMTP server, routing, security, and delivery |
+| `Email` | Email message class with validation, attachments, headers, and RFC 822 serialization |
+| `EmailRouter` | Pattern-based route matching and evaluation engine |
+| `DomainRegistry` | Multi-domain configuration manager |
+| `DnsManager` | Automatic DNS record management |
+| `DKIMCreator` | DKIM key generation, storage, rotation |
+| `DKIMVerifier` | DKIM signature verification (delegates to Rust) |
+| `SpfVerifier` | SPF record validation (delegates to Rust) |
+| `DmarcVerifier` | DMARC policy enforcement (delegates to Rust) |
+
+### Namespaced Exports
+
+| Namespace | Classes |
+|---|---|
+| `Core` | `Email`, `EmailValidator`, `TemplateManager`, `BounceManager` |
+| `Delivery` | `UnifiedDeliveryQueue`, `MultiModeDeliverySystem`, `DeliveryStatus`, `UnifiedRateLimiter` |
+
 ## License and Legal Information

 This repository contains open-source code licensed under the MIT License. A copy of the license can be found in the [LICENSE](./LICENSE) file.
--- a/test/test.e2e.inbound-smtp.node.ts
+++ b/test/test.e2e.inbound-smtp.node.ts
@@ -0,0 +1,239 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import { UnifiedEmailServer } from '../ts/mail/routing/classes.unified.email.server.js';
+import { RustSecurityBridge } from '../ts/security/classes.rustsecuritybridge.js';
+import {
+  connectToSmtp,
+  waitForGreeting,
+  sendSmtpCommand,
+  performSmtpHandshake,
+  createConcurrentConnections,
+  createMimeMessage,
+} from './helpers/utils.js';
+
+const storageMap = new Map<string, string>();
+const mockDcRouter = {
+  storageManager: {
+    get: async (key: string) => storageMap.get(key) || null,
+    set: async (key: string, value: string) => { storageMap.set(key, value); },
+  },
+};
+
+let server: UnifiedEmailServer;
+let bridge: RustSecurityBridge;
+let bridgeAvailable = false;
+
+tap.test('setup - start server on port 10125', async () => {
+  RustSecurityBridge.resetInstance();
+  bridge = RustSecurityBridge.getInstance();
+
+  server = new UnifiedEmailServer(mockDcRouter, {
+    ports: [10125],
+    hostname: 'test.inbound.local',
+    domains: [
+      {
+        domain: 'testdomain.com',
+        dnsMode: 'forward',
+      },
+    ],
+    routes: [
+      {
+        name: 'catch-all',
+        priority: 0,
+        match: {
+          recipients: '*@testdomain.com',
+        },
+        action: {
+          type: 'process',
+        },
+      },
+    ],
+  });
+
+  try {
+    await server.start();
+    bridgeAvailable = true;
+  } catch (err) {
+    console.log(`SKIP: Server failed to start — ${(err as Error).message}`);
+    console.log('Build the Rust binary with: cd rust && cargo build --release');
+  }
+});
+
+tap.test('EHLO and capability discovery', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const socket = await connectToSmtp('127.0.0.1', 10125, 10000);
+  const capabilities = await performSmtpHandshake(socket, 'test-client.local');
+
+  // Verify we received capabilities from the EHLO response
+  expect(capabilities.length).toBeGreaterThan(0);
+
+  // The server hostname should be in the first capability line
+  const firstLine = capabilities[0];
+  expect(firstLine).toBeTruthy();
+
+  socket.destroy();
+});
+
+tap.test('send valid email - full SMTP transaction', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const socket = await connectToSmtp('127.0.0.1', 10125, 10000);
+  await waitForGreeting(socket, 10000);
+
+  // EHLO
+  await sendSmtpCommand(socket, 'EHLO test-client.local', '250', 10000);
+
+  // MAIL FROM
+  await sendSmtpCommand(socket, 'MAIL FROM:<sender@example.com>', '250', 10000);
+
+  // RCPT TO
+  await sendSmtpCommand(socket, 'RCPT TO:<user@testdomain.com>', '250', 10000);
+
+  // DATA
+  await sendSmtpCommand(socket, 'DATA', '354', 10000);
+
+  // Send MIME message
+  const mimeMessage = createMimeMessage({
+    from: 'sender@example.com',
+    to: 'user@testdomain.com',
+    subject: 'E2E Test Email',
+    text: 'This is an end-to-end test email.',
+  });
+
+  // Send the message data followed by the terminator
+  await new Promise<void>((resolve, reject) => {
+    let buffer = '';
+    const timer = setTimeout(() => {
+      socket.removeAllListeners('data');
+      reject(new Error('DATA response timeout'));
+    }, 10000);
+
+    const onData = (data: Buffer) => {
+      buffer += data.toString();
+      if (buffer.includes('250')) {
+        clearTimeout(timer);
+        socket.removeListener('data', onData);
+        resolve();
+      }
+    };
+
+    socket.on('data', onData);
+    socket.write(mimeMessage + '\r\n.\r\n');
+  });
+
+  // QUIT
+  try {
+    await sendSmtpCommand(socket, 'QUIT', '221', 5000);
+  } catch {
+    // Ignore QUIT errors
+  }
+  socket.destroy();
+
+  // Verify the email was queued for processing
+  const stats = server.deliveryQueue.getStats();
+  expect(stats.queueSize).toBeGreaterThan(0);
+});
+
+tap.test('multiple recipients', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const socket = await connectToSmtp('127.0.0.1', 10125, 10000);
+  await waitForGreeting(socket, 10000);
+
+  await sendSmtpCommand(socket, 'EHLO test-client.local', '250', 10000);
+  await sendSmtpCommand(socket, 'MAIL FROM:<sender@example.com>', '250', 10000);
+  await sendSmtpCommand(socket, 'RCPT TO:<user1@testdomain.com>', '250', 10000);
+  await sendSmtpCommand(socket, 'RCPT TO:<user2@testdomain.com>', '250', 10000);
+
+  await sendSmtpCommand(socket, 'DATA', '354', 10000);
+
+  const mimeMessage = createMimeMessage({
+    from: 'sender@example.com',
+    to: 'user1@testdomain.com',
+    subject: 'Multi-recipient Test',
+    text: 'Testing multiple recipients.',
+  });
+
+  await new Promise<void>((resolve, reject) => {
+    let buffer = '';
+    const timer = setTimeout(() => {
+      socket.removeAllListeners('data');
+      reject(new Error('DATA response timeout'));
+    }, 10000);
+
+    const onData = (data: Buffer) => {
+      buffer += data.toString();
+      if (buffer.includes('250')) {
+        clearTimeout(timer);
+        socket.removeListener('data', onData);
+        resolve();
+      }
+    };
+
+    socket.on('data', onData);
+    socket.write(mimeMessage + '\r\n.\r\n');
+  });
+
+  socket.destroy();
+});
+
+tap.test('concurrent connections', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const sockets = await createConcurrentConnections('127.0.0.1', 10125, 3, 10000);
+  expect(sockets.length).toEqual(3);
+
+  // Perform EHLO on each connection
+  for (const socket of sockets) {
+    await waitForGreeting(socket, 10000);
+    await sendSmtpCommand(socket, 'EHLO concurrent-client.local', '250', 10000);
+  }
+
+  // Close all connections
+  for (const socket of sockets) {
+    socket.destroy();
+  }
+});
+
+tap.test('RSET mid-session', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const socket = await connectToSmtp('127.0.0.1', 10125, 10000);
+  await waitForGreeting(socket, 10000);
+  await sendSmtpCommand(socket, 'EHLO test-client.local', '250', 10000);
+
+  // Start a transaction
+  await sendSmtpCommand(socket, 'MAIL FROM:<sender@example.com>', '250', 10000);
+
+  // Reset the transaction
+  await sendSmtpCommand(socket, 'RSET', '250', 10000);
+
+  // Start a new transaction after RSET
+  await sendSmtpCommand(socket, 'MAIL FROM:<other@example.com>', '250', 10000);
+
+  socket.destroy();
+});
+
+tap.test('cleanup - stop server', async () => {
+  if (bridgeAvailable) {
+    await server.stop();
+  }
+  await tap.stopForcefully();
+});
+
+export default tap.start();
--- a/test/test.e2e.outbound-delivery.node.ts
+++ b/test/test.e2e.outbound-delivery.node.ts
@@ -0,0 +1,196 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import { UnifiedEmailServer } from '../ts/mail/routing/classes.unified.email.server.js';
+import { RustSecurityBridge, BridgeState } from '../ts/security/classes.rustsecuritybridge.js';
+import type { ISmtpPoolStatus } from '../ts/security/classes.rustsecuritybridge.js';
+import { Email } from '../ts/mail/core/classes.email.js';
+import * as net from 'net';
+
+const storageMap = new Map<string, string>();
+const mockDcRouter = {
+  storageManager: {
+    get: async (key: string) => storageMap.get(key) || null,
+    set: async (key: string, value: string) => { storageMap.set(key, value); },
+  },
+};
+
+let server: UnifiedEmailServer;
+let bridge: RustSecurityBridge;
+let bridgeAvailable = false;
+let mockSmtpServer: net.Server;
+
+/**
+ * Create a minimal mock SMTP server that accepts any email.
+ * This avoids the IPC deadlock that occurs when the Rust SMTP client
+ * sends to the same Rust process's SMTP server (the IPC stdin reader
+ * blocks on the sendEmail command and can't process emailProcessingResult).
+ */
+function createMockSmtpServer(port: number): Promise<net.Server> {
+  return new Promise((resolve, reject) => {
+    const srv = net.createServer((socket) => {
+      socket.write('220 mock-smtp.local ESMTP MockServer\r\n');
+
+      let inData = false;
+      let dataBuffer = '';
+
+      socket.on('data', (chunk) => {
+        const input = chunk.toString();
+
+        if (inData) {
+          dataBuffer += input;
+          if (dataBuffer.includes('\r\n.\r\n')) {
+            inData = false;
+            dataBuffer = '';
+            socket.write('250 2.0.0 Ok: queued\r\n');
+          }
+          return;
+        }
+
+        // Process SMTP commands line by line
+        const lines = input.split('\r\n').filter((l: string) => l.length > 0);
+        for (const line of lines) {
+          const cmd = line.toUpperCase();
+          if (cmd.startsWith('EHLO') || cmd.startsWith('HELO')) {
+            socket.write(`250-mock-smtp.local\r\n250-SIZE 10485760\r\n250 OK\r\n`);
+          } else if (cmd.startsWith('MAIL FROM')) {
+            socket.write('250 2.1.0 Ok\r\n');
+          } else if (cmd.startsWith('RCPT TO')) {
+            socket.write('250 2.1.5 Ok\r\n');
+          } else if (cmd === 'DATA') {
+            inData = true;
+            dataBuffer = '';
+            socket.write('354 End data with <CR><LF>.<CR><LF>\r\n');
+          } else if (cmd === 'QUIT') {
+            socket.write('221 2.0.0 Bye\r\n');
+            socket.end();
+          } else if (cmd === 'RSET') {
+            socket.write('250 2.0.0 Ok\r\n');
+          }
+        }
+      });
+    });
+
+    srv.listen(port, '127.0.0.1', () => {
+      resolve(srv);
+    });
+
+    srv.on('error', reject);
+  });
+}
+
+tap.test('setup - start bridge and mock SMTP server', async () => {
+  RustSecurityBridge.resetInstance();
+  bridge = RustSecurityBridge.getInstance();
+
+  server = new UnifiedEmailServer(mockDcRouter, {
+    ports: [10325],
+    hostname: 'test.outbound.local',
+    domains: [
+      {
+        domain: 'outbound-test.com',
+        dnsMode: 'forward',
+      },
+    ],
+    routes: [
+      {
+        name: 'catch-all',
+        priority: 0,
+        match: {
+          recipients: '*',
+        },
+        action: {
+          type: 'process',
+        },
+      },
+    ],
+  });
+
+  try {
+    await server.start();
+    bridgeAvailable = true;
+  } catch (err) {
+    console.log(`SKIP: Server failed to start — ${(err as Error).message}`);
+    console.log('Build the Rust binary with: cd rust && cargo build --release');
+    return;
+  }
+
+  // Start a mock SMTP server on a separate port for outbound delivery tests
+  mockSmtpServer = await createMockSmtpServer(10326);
+});
+
+tap.test('send email to mock SMTP receiver', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'sender@outbound-test.com',
+    to: 'recipient@outbound-test.com',
+    subject: 'Outbound E2E Test',
+    text: 'Testing outbound delivery to the mock SMTP server.',
+  });
+
+  // Send to the mock SMTP server (port 10326), not the Rust SMTP server (port 10325)
+  const result = await server.sendOutboundEmail('127.0.0.1', 10326, email);
+
+  expect(result).toBeTruthy();
+  expect(result.accepted).toBeTruthy();
+  expect(result.accepted.length).toBeGreaterThan(0);
+  expect(result.response).toBeTruthy();
+  // Rust SMTP client returns enhanced status code without the 250 prefix
+  expect(result.response).toInclude('2.0.0');
+});
+
+tap.test('send email - connection refused', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'sender@outbound-test.com',
+    to: 'recipient@outbound-test.com',
+    subject: 'Connection Refused Test',
+    text: 'This should fail — no server at port 59888.',
+  });
+
+  try {
+    await server.sendOutboundEmail('127.0.0.1', 59888, email);
+    throw new Error('Expected sendOutboundEmail to fail on connection refused');
+  } catch (err: any) {
+    expect(err).toBeTruthy();
+    expect(err.message.length).toBeGreaterThan(0);
+  }
+});
+
+tap.test('SMTP pool status and cleanup', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const status: ISmtpPoolStatus = await bridge.getSmtpPoolStatus();
+  expect(status).toBeTruthy();
+  expect(status.pools).toBeTruthy();
+  expect(typeof status.pools).toEqual('object');
+
+  // Close all pools
+  await bridge.closeSmtpPool();
+
+  // Verify pools are empty
+  const statusAfter = await bridge.getSmtpPoolStatus();
+  const poolKeys = Object.keys(statusAfter.pools);
+  expect(poolKeys.length).toEqual(0);
+});
+
+tap.test('cleanup - stop server and mock', async () => {
+  if (mockSmtpServer) {
+    await new Promise<void>((resolve) => mockSmtpServer.close(() => resolve()));
+  }
+  if (bridgeAvailable) {
+    await server.stop();
+  }
+  await tap.stopForcefully();
+});
+
+export default tap.start();
--- a/test/test.e2e.routing-actions.node.ts
+++ b/test/test.e2e.routing-actions.node.ts
@@ -0,0 +1,239 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import { UnifiedEmailServer } from '../ts/mail/routing/classes.unified.email.server.js';
+import { RustSecurityBridge } from '../ts/security/classes.rustsecuritybridge.js';
+import { Email } from '../ts/mail/core/classes.email.js';
+import { SmtpState } from '../ts/mail/delivery/interfaces.js';
+
+const storageMap = new Map<string, string>();
+const mockDcRouter = {
+  storageManager: {
+    get: async (key: string) => storageMap.get(key) || null,
+    set: async (key: string, value: string) => { storageMap.set(key, value); },
+  },
+};
+
+let server: UnifiedEmailServer;
+let bridge: RustSecurityBridge;
+let bridgeAvailable = false;
+
+/**
+ * Build a minimal SMTP session object for processEmailByMode().
+ */
+function buildSession(email: Email): any {
+  return {
+    id: `test-${Date.now()}-${Math.random().toString(36).substring(2)}`,
+    state: SmtpState.FINISHED,
+    mailFrom: email.from,
+    rcptTo: email.to,
+    emailData: '',
+    useTLS: false,
+    connectionEnded: false,
+    remoteAddress: '127.0.0.1',
+    clientHostname: 'test-client.local',
+    secure: false,
+    authenticated: false,
+    envelope: {
+      mailFrom: { address: email.from, args: {} },
+      rcptTo: email.to.map((addr: string) => ({ address: addr, args: {} })),
+    },
+  };
+}
+
+tap.test('setup - start server with routing rules on port 10225', async () => {
+  RustSecurityBridge.resetInstance();
+  bridge = RustSecurityBridge.getInstance();
+
+  server = new UnifiedEmailServer(mockDcRouter, {
+    ports: [10225],
+    hostname: 'test.routing.local',
+    domains: [
+      { domain: 'process.com', dnsMode: 'forward' },
+      { domain: 'local.com', dnsMode: 'forward' },
+      { domain: 'external.com', dnsMode: 'forward' },
+    ],
+    routes: [
+      {
+        name: 'reject-route',
+        priority: 40,
+        match: {
+          senders: '*@spammer.com',
+        },
+        action: {
+          type: 'reject',
+          reject: {
+            code: 550,
+            message: 'Spam rejected',
+          },
+        },
+      },
+      {
+        name: 'process-route',
+        priority: 30,
+        match: {
+          recipients: '*@process.com',
+        },
+        action: {
+          type: 'process',
+          process: {
+            scan: true,
+          },
+        },
+      },
+      {
+        name: 'deliver-route',
+        priority: 20,
+        match: {
+          recipients: '*@local.com',
+        },
+        action: {
+          type: 'deliver',
+        },
+      },
+      {
+        name: 'forward-route',
+        priority: 10,
+        match: {
+          recipients: '*@external.com',
+        },
+        action: {
+          type: 'forward',
+          forward: {
+            host: '127.0.0.1',
+            port: 59999, // No server listening — expected failure
+          },
+        },
+      },
+    ],
+  });
+
+  try {
+    await server.start();
+    bridgeAvailable = true;
+  } catch (err) {
+    console.log(`SKIP: Server failed to start — ${(err as Error).message}`);
+    console.log('Build the Rust binary with: cd rust && cargo build --release');
+  }
+});
+
+tap.test('process action - queues email for processing', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'sender@example.com',
+    to: 'user@process.com',
+    subject: 'Process test',
+    text: 'This email should be queued for processing.',
+  });
+
+  const session = buildSession(email);
+  const result = await server.processEmailByMode(email, session);
+  expect(result).toBeTruthy();
+
+  const stats = server.deliveryQueue.getStats();
+  expect(stats.modes.process).toBeGreaterThan(0);
+});
+
+tap.test('deliver action - queues email for MTA delivery', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'sender@example.com',
+    to: 'user@local.com',
+    subject: 'Deliver test',
+    text: 'This email should be queued for local delivery.',
+  });
+
+  const session = buildSession(email);
+  const result = await server.processEmailByMode(email, session);
+  expect(result).toBeTruthy();
+
+  const stats = server.deliveryQueue.getStats();
+  expect(stats.modes.mta).toBeGreaterThan(0);
+});
+
+tap.test('reject action - throws with correct code', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'bad@spammer.com',
+    to: 'user@process.com',
+    subject: 'Spam attempt',
+    text: 'This should be rejected.',
+  });
+
+  const session = buildSession(email);
+
+  try {
+    await server.processEmailByMode(email, session);
+    throw new Error('Expected processEmailByMode to throw for rejected email');
+  } catch (err: any) {
+    expect(err.responseCode).toEqual(550);
+    expect(err.message).toInclude('Spam rejected');
+  }
+});
+
+tap.test('forward action - fails to unreachable host', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'sender@example.com',
+    to: 'user@external.com',
+    subject: 'Forward test',
+    text: 'This forward should fail — no server at port 59999.',
+  });
+
+  const session = buildSession(email);
+
+  try {
+    await server.processEmailByMode(email, session);
+    throw new Error('Expected processEmailByMode to throw for unreachable forward host');
+  } catch (err: any) {
+    // We expect an error from the failed SMTP connection
+    expect(err).toBeTruthy();
+    expect(err.message).toBeTruthy();
+  }
+});
+
+tap.test('no matching route - throws error', async () => {
+  if (!bridgeAvailable) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const email = new Email({
+    from: 'sender@example.com',
+    to: 'nobody@unmatched.com',
+    subject: 'Unmatched route test',
+    text: 'No route matches this recipient.',
+  });
+
+  const session = buildSession(email);
+
+  try {
+    await server.processEmailByMode(email, session);
+    throw new Error('Expected processEmailByMode to throw for no matching route');
+  } catch (err: any) {
+    expect(err.message).toInclude('No matching route');
+  }
+});
+
+tap.test('cleanup - stop server', async () => {
+  if (bridgeAvailable) {
+    await server.stop();
+  }
+  await tap.stopForcefully();
+});
+
+export default tap.start();
--- a/test/test.e2e.server-lifecycle.node.ts
+++ b/test/test.e2e.server-lifecycle.node.ts
@@ -0,0 +1,118 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import { UnifiedEmailServer } from '../ts/mail/routing/classes.unified.email.server.js';
+import { RustSecurityBridge, BridgeState } from '../ts/security/classes.rustsecuritybridge.js';
+import { connectToSmtp, waitForGreeting } from './helpers/utils.js';
+import * as net from 'net';
+
+// Common mock pattern for dcRouter dependency
+const storageMap = new Map<string, string>();
+const mockDcRouter = {
+  storageManager: {
+    get: async (key: string) => storageMap.get(key) || null,
+    set: async (key: string, value: string) => { storageMap.set(key, value); },
+  },
+};
+
+let server: UnifiedEmailServer;
+let bridge: RustSecurityBridge;
+
+tap.test('setup - reset bridge singleton', async () => {
+  RustSecurityBridge.resetInstance();
+  bridge = RustSecurityBridge.getInstance();
+});
+
+tap.test('construct server - should create UnifiedEmailServer', async () => {
+  server = new UnifiedEmailServer(mockDcRouter, {
+    ports: [10025, 10587],
+    hostname: 'test.e2e.local',
+    domains: [
+      {
+        domain: 'e2e-test.com',
+        dnsMode: 'forward',
+      },
+    ],
+    routes: [
+      {
+        name: 'catch-all',
+        priority: 0,
+        match: {
+          recipients: '*@e2e-test.com',
+        },
+        action: {
+          type: 'process',
+        },
+      },
+    ],
+  });
+  expect(server).toBeTruthy();
+  expect(server).toBeInstanceOf(UnifiedEmailServer);
+});
+
+tap.test('start server - should start and accept SMTP connections', async () => {
+  try {
+    await server.start();
+  } catch (err) {
+    console.log(`SKIP: Server failed to start — ${(err as Error).message}`);
+    console.log('Build the Rust binary with: cd rust && cargo build --release');
+    return;
+  }
+
+  expect(bridge.running).toBeTrue();
+
+  // Connect to port 10025 and verify we get a 220 greeting
+  const socket = await connectToSmtp('127.0.0.1', 10025, 10000);
+  const greeting = await waitForGreeting(socket, 10000);
+  expect(greeting).toInclude('220');
+  socket.destroy();
+});
+
+tap.test('get stats - should return server statistics', async () => {
+  if (!bridge.running) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  const stats = server.getStats();
+  expect(stats).toBeTruthy();
+  expect(stats.startTime).toBeInstanceOf(Date);
+  expect(stats.connections).toBeTruthy();
+  expect(typeof stats.connections.current).toEqual('number');
+  expect(typeof stats.connections.total).toEqual('number');
+  expect(stats.messages).toBeTruthy();
+  expect(typeof stats.messages.processed).toEqual('number');
+});
+
+tap.test('stop server - should stop and refuse connections', async () => {
+  if (!bridge.running) {
+    console.log('SKIP: bridge not running');
+    return;
+  }
+
+  await server.stop();
+
+  // Verify connection is refused after stop
+  try {
+    const socket = await connectToSmtp('127.0.0.1', 10025, 3000);
+    socket.destroy();
+    // If we get here, the connection was accepted — that's unexpected
+    throw new Error('Expected connection to be refused after server stop');
+  } catch (err) {
+    // Connection refused or timeout is expected
+    const msg = (err as Error).message;
+    expect(
+      msg.includes('ECONNREFUSED') || msg.includes('timeout') || msg.includes('refused')
+    ).toBeTrue();
+  }
+
+  expect(bridge.state).toEqual(BridgeState.Stopped);
+});
+
+tap.test('stop', async () => {
+  // Clean up if not already stopped
+  if (bridge.running) {
+    await server.stop();
+  }
+  await tap.stopForcefully();
+});
+
+export default tap.start();
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
 */
 export const commitinfo = {
  name: '@push.rocks/smartmta',
-  version: '4.0.0',
+  version: '4.1.1',
  description: 'A high-performance, enterprise-grade Mail Transfer Agent (MTA) built from scratch in TypeScript with Rust acceleration.'
 }
Author	SHA1	Message	Date
Juergen Kunz	cf8fcb6efa	v4.1.1 Some checks failed CI / Type Check & Lint (push) Failing after 4s Details CI / Build Test (Current Platform) (push) Failing after 4s Details CI / Build All Platforms (push) Failing after 4s Details Publish to npm / npm-publish (push) Failing after 5s Details Release / build-and-release (push) Failing after 5s Details	2026-02-11 07:36:54 +00:00
Juergen Kunz	2088c9f76e	fix(readme): clarify architecture and IPC, document outbound flow and testing, and update module and crate descriptions in README	2026-02-11 07:36:54 +00:00
Juergen Kunz	7853ef67b6	v4.1.0 Some checks failed CI / Type Check & Lint (push) Failing after 4s Details CI / Build Test (Current Platform) (push) Failing after 4s Details CI / Build All Platforms (push) Failing after 4s Details Publish to npm / npm-publish (push) Failing after 5s Details Release / build-and-release (push) Failing after 4s Details	2026-02-11 07:31:08 +00:00
Juergen Kunz	f7af8c4534	feat(e2e-tests): add Node.js end-to-end tests covering server lifecycle, inbound SMTP handling, outbound delivery and routing actions	2026-02-11 07:31:08 +00:00