Stalwart Mail Server
Modern all-in-one mail server with JMAP, IMAP4, and SMTP in a single Rust binary
Overview
Stalwart is a high-performance, all-in-one mail server written in Rust that supports JMAP, IMAP4, and SMTP in a single binary. It provides built-in spam and phishing filtering, anti-virus integration, full-text search, and a web-based admin interface. Stalwart handles SPF, DKIM, DMARC, ARC, and MTA-STS natively, and can store mail in common backends including RocksDB, PostgreSQL, MySQL, and S3-compatible object storage. Docker images are available for quick deployment.
Where it falls short of Gmail / Google Workspace
- No built-in newsletter/broadcast campaign tooling
- Web admin UI is functional but less refined than commercial email service dashboards
- Third-party anti-virus (ClamAV) integration requires additional setup
- Community support only on the free tier; paid support plans are limited
We list the gaps honestly so you can decide if the trade-off is worth owning your data.
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