- Make email authentication optional in transporter config
- Only add auth object if both username and password are provided
- Update initialization to only require SMTP_HOST
- Add logging to show whether auth is enabled
- Update documentation with no-auth configuration examples
- Fix "Unrecognized authentication type" error for open relays
Exchange servers configured as internal relays often don't
require authentication. This fix allows using them by leaving
SMTP_USER and SMTP_PASS empty in the .env file.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
- 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>
paul