Built this after getting frustrated with the paying to a google for email. Now running it for 1 months in production.
What it does:
- Full SMTP server (inbound/outbound, DKIM signing, SPF/DMARC checking)
- IMAP with IDLE support
- CalDAV/CardDAV (replace Google Calendar/Contacts)
- Web admin panel with Prometheus metrics
- Greylisting for spam prevention
- Auto-discovery (mail clients configure themselves)
- Audit logging for compliance
What it doesn't do:
- Webmail (use Roundcube, etc.)
- ML-based spam filtering (greylisting + basic heuristics only)
- Clustering/HA
What it does: - Full SMTP server (inbound/outbound, DKIM signing, SPF/DMARC checking) - IMAP with IDLE support - CalDAV/CardDAV (replace Google Calendar/Contacts) - Web admin panel with Prometheus metrics - Greylisting for spam prevention - Auto-discovery (mail clients configure themselves) - Audit logging for compliance
What it doesn't do: - Webmail (use Roundcube, etc.) - ML-based spam filtering (greylisting + basic heuristics only) - Clustering/HA