- Remove SMTP host/port/username/TLS configuration - Add Mailkening API token configuration - Update email provider dropdown (Mailketing only) - Update test email function to use Mailketing API - Update help text and validation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>