- Refactored STARTTLS implementation to use Deno's native TLS via Deno.startTls().
- Introduced ConnectionWrapper to provide a Node.js net.Socket-compatible interface for Deno.Conn and Deno.TlsConn.
- Updated TlsHandler to utilize the new STARTTLS implementation.
- Added comprehensive SMTP authentication tests for PLAIN and LOGIN mechanisms.
- Implemented rate limiting tests for SMTP server connections and commands.
- Enhanced error handling and logging throughout the STARTTLS and connection upgrade processes.
- Ported CMD-06 RSET Command tests with 8 passing tests covering transaction resets and recipient clearing.
- Ported SEC-06 IP Reputation tests with 7 passing tests validating infrastructure and legitimate traffic acceptance.
- Ported ERR-01 Syntax Error tests with 10 passing tests for handling invalid commands and syntax errors.
- Updated README files to reflect the new test statuses and coverage.
- Added detailed test cases for handling invalid sequences in ERR-02 tests.
