Stalwart Mail Server
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.
High commit volume, frequent releases and growing activity.
Commit activity more than 71% of tracked projects; popularity more than 84%. How this is calculated.
Commits, last 11 months
| Stars | 15k |
|---|---|
| Latest release | v0.16.24 · 27 Sept 2026 |
| Repo updated | 27 Sept 2026 |
| Licence | AGPL-3.0 |
| Built with | Rust, Docker |
Is Stalwart Mail Server actively maintained?
Development is ongoing. The repository recorded 658 commits over the same window, and the last three months alone account for 264 of them.
The most recent tagged release, v0.16.24, shipped within the last month — a current, installable version exists today.
Among the 18 communication - email - complete solutions projects we track, Stalwart Mail Server currently has the highest health score.
What Stalwart Mail Server actually does
Stalwart Mail Server is an all-in-one messaging platform that handles SMTP, IMAP4, and JMAP protocols. It provides a complete solution for self-hosting electronic mail infrastructure with a focus on modern protocol support.
Best fit: It is well-suited for system administrators looking to deploy a contemporary, containerised email stack with support for modern protocols like JMAP.
Worth knowing: Self-hosting email carries a high operational burden regarding deliverability, DNS configuration, and security, compounded by the copyleft requirements of the AGPL-3.0 licence.
Deployment notes
As a containerised Rust application, it typically requires persistent storage volumes for mail data and a reverse proxy to handle TLS termination properly.
Links
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