feat(docs): document Rust-side in-process security pipeline and update README to reflect SMTP server behavior and crate/test counts

changelog.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 2026-02-10 - 2.4.0 - feat(docs)
+document Rust-side in-process security pipeline and update README to reflect SMTP server behavior and crate/test counts
+
+- Clarifies that the Rust SMTP server accepts the full SMTP protocol and runs the security pipeline in-process (DKIM/SPF/DMARC verification, content scanning, IP reputation/DNSBL) to avoid IPC round-trips
+- Notes that Rust now emits an emailReceived IPC event with pre-computed security results attached for TypeScript to use in routing/delivery decisions
+- Updates mailer-smtp crate description to include the in-process security pipeline and increments its test count from 72 to 77
+- Adjusts TypeScript directory comments to reflect removal/relocation of the legacy TS SMTP server and the smtpclient path
+
 ## 2026-02-10 - 2.3.2 - fix(tests)
 remove large SMTP client test suites and update SmartFile API usage
 

readme.md

@@ -70,10 +70,10 @@ After installation, run `pnpm build` to compile the Rust binary (`mailer-bin`).
 
 **Data flow for inbound mail:**
 
-1. Rust SMTP server accepts the connection and handles the SMTP protocol
-2. On `DATA` completion, Rust emits an `emailReceived` event via IPC
-3. TypeScript processes the email (routing, scanning, delivery decisions)
-4. TypeScript sends the processing result back to Rust via IPC
+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
 
 ## Usage
@@ -569,7 +569,7 @@ Performance-critical operations are implemented in Rust and communicate with the
 |---|---|---|
 | `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 (72 tests) | Full SMTP protocol engine — TCP/TLS server, STARTTLS, AUTH, pipelining, rate limiting |
+| `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) |
 
@@ -598,8 +598,7 @@ smartmta/
 │   ├── mail/
 │   │   ├── core/                    # Email, EmailValidator, BounceManager, TemplateManager
 │   │   ├── delivery/                # DeliverySystem, Queue, RateLimiter
-│   │   │   ├── smtpclient/          # SMTP client with connection pooling
-│   │   │   └── smtpserver/          # Legacy TS SMTP server (socket-handler fallback)
+│   │   │   └── smtpclient/          # SMTP client with connection pooling
 │   │   ├── routing/                 # UnifiedEmailServer, EmailRouter, DomainRegistry, DnsManager
 │   │   └── security/                # DKIMCreator, DKIMVerifier, SpfVerifier, DmarcVerifier
 │   └── security/                    # ContentScanner, IPReputationChecker, RustSecurityBridge

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartmta',
-  version: '2.3.2',
+  version: '2.4.0',
   description: 'A high-performance, enterprise-grade Mail Transfer Agent (MTA) built from scratch in TypeScript with Rust acceleration.'
 }