- Add TLS configuration to accept self-signed certificates
- Disable TLS/STARTTLS for port 25 when SMTP_SECURE=false
- Add ignoreTLS option for Exchange servers on port 25
- Update .env.example with Exchange-specific configuration
- Create comprehensive EMAIL_CONFIGURATION.md guide
- Support both Exchange internal servers and modern SMTP servers
This fixes the "self-signed certificate" error when connecting
to Microsoft Exchange servers on port 25 without TLS.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
