Stalwart Mail Server
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.
- GitHub stars
- 15,074
- License
- AGPL-3.0
- Latest release
- v0.16.26
11 October 2026 - Last commit
- 11 October 2026
- Runs on
- Rust, Docker
Commits per month, last 12 months
701 commits
Replaces
Paid products Stalwart Mail Server can stand in for.
How to self-host Stalwart Mail Server
Stalwart Mail Server runs on Rust and Docker. The project's own install guide is the place to start; most people put it on a small server with Docker and a reverse proxy for HTTPS.
- Get a server: a home server, a VPS, or a managed app host.
- Install it the way the project's docs describe, usually with Docker Compose.
- Put it behind HTTPS and set up backups before you add real data.
- Update it regularly. Watch the project's releases.
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Questions
Is Stalwart Mail Server free?
Yes. Stalwart Mail Server is open source under the AGPL-3.0 license, so you can use it without paying for a license. You pay only for the server it runs on.
Can I self-host Stalwart Mail Server?
Yes. Stalwart Mail Server runs on Rust and Docker. Follow the install guide in the project's documentation, or use a host that installs it for you.
What does Stalwart Mail Server replace?
People use Stalwart Mail Server instead of Fastmail, Gmail, Outlook.com or Microsoft Exchange.
Is Stalwart Mail Server still maintained?
The last change to Stalwart Mail Server's code was on 11 October 2026, with 701 commits in the last 12 months.
Topics
App data from awesome-selfhosted (CC BY-SA 3.0), stars and activity from GitHub.