feat(mailer-smtp): implement in-process SMTP server and management IPC integration

changelog.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## 2026-02-10 - 2.2.0 - feat(mailer-smtp)
+implement in-process SMTP server and management IPC integration
+
+- Add full SMTP protocol engine crate (mailer-smtp) with modules: command, config, connection, data, response, session, state, validation, rate_limiter and server
+- Introduce SmtpServerConfig, DataAccumulator (DATA phase handling, dot-unstuffing, size limits) and SmtpResponse builder with EHLO capability construction
+- Add in-process RateLimiter using DashMap and runtime-configurable RateLimitConfig
+- Add TCP/TLS server start/stop API (start_server) with TlsAcceptor building from PEM and SmtpServerHandle for shutdown and status
+- Integrate callback registry and oneshot-based correlation callbacks in mailer-bin management mode for email processing/auth results and JSON IPC parsing for SmtpServerConfig
+- TypeScript bridge and routing updates: new IPC commands/types (startSmtpServer, stopSmtpServer, emailProcessingResult, authResult, configureRateLimits) and event handlers (emailReceived, authRequest)
+- Update Cargo manifests and lockfile to add dependencies (dashmap, regex, rustls, rustls-pemfile, rustls-pki-types, uuid, serde_json, base64, etc.)
+- Add comprehensive unit tests for new modules (config, data, response, session, state, rate_limiter, validation)
+
 ## 2026-02-10 - 2.1.0 - feat(security)
 migrate content scanning and bounce detection to Rust security bridge; add scanContent IPC command and Rust content scanner with tests; update TS RustSecurityBridge and callers, and adjust CI package references