Stalwart Mail Server
All-in-one secure mail and collaboration server written in Rust.
About Stalwart Mail Server
Stalwart is an all-in-one open-source mail and collaboration server written in Rust. It supports IMAP4, JMAP, SMTP, POP3, CalDAV, CardDAV, and WebDAV with built-in spam filtering, DMARC/DKIM/SPF/ARC authentication, full-text search in 17 languages, and enterprise-grade security.
Key Features
- Complete protocol support: IMAP, JMAP, SMTP, POP3, CalDAV, CardDAV, WebDAV
- Built-in spam filter with LLM analysis, DNSBL, and greylisting
- Automatic TLS via ACME with DANE, MTA-STS, and SMTP TLS reporting
- Pluggable storage: RocksDB, FoundationDB, PostgreSQL, MySQL, S3
- Web-based admin dashboard with real-time monitoring and self-service portal
Self-Hosting Notes
Docker with single binary. Written in Rust. Requires domain with DNS access. Supports SQLite, PostgreSQL, MySQL, S3 backends. Single-node or clustered.
More in Communication & Messaging
AudioBookshelf
Self-hosted audiobook and podcast server with mobile apps.
BillionMail
Open-source mail server with built-in email marketing and campaign management.
Discourse
Modern forum and community platform for civilized discussion.
Docker Mailserver
Production-ready, fullstack containerized mail server no SQL database required.