Stalwart Mail Server
Stalwart Mail Server is an open-source, self-hosted app in the Email Servers category, licensed AGPL-3.0 and written mainly in Rust. It is a self-hosted alternative to Twilio SendGrid, Mailgun and Gmail and ships a Docker image. It has 15,298 GitHub stars and its last commit was on Oct 20, 2026 (data as of Oct 26, 2026).
GitHub stats
- GitHub stars
- 15,298
- Forks
- 1,018
- Open issues
- 51
- Commits, last 12 months
- 715
- Last commit
- Oct 20, 2026
- Latest release
- v0.16.27Oct 18, 2026
- Created
- Mar 6, 2023
- License
- AGPL-3.0Open source
Data as of from the GitHub API. Report an error
Project health
ActiveActive: last commit Oct 20, 2026, 715 commits in 12 months.
- Regular releases10 or more releases in 12 months
- Security policyPublishes a security policy on GitHub
| Last commit | Oct 20, 2026 |
|---|---|
| Commits, last 12 months | 715 |
| Latest release | v0.16.27 (Oct 18, 2026) |
| Releases, last 12 months | 10 or more |
| Releases, all time | 97 |
| Open issues | 51 |
| Open pull requests | 3 |
| Good first issues | 0 |
| Contributing guide | Yes |
| Security policy | Yes |
| Created | Mar 6, 2023 |
Health as of , from the GitHub API. A label describes activity, not quality or security. How we label project health · Report a data error
About Stalwart Mail Server
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.
Description adapted from awesome-selfhosted (CC BY-SA 3.0). Source code: github.com/stalwartlabs/stalwart.
Topics
- imap
- jmap
- rust
- server
- smtp
- pop3
- caldav
- carddav
- webdav
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Is Stalwart Mail Server free and open source?
Yes. Stalwart Mail Server is open-source software released under the AGPL-3.0 license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.
Can I run Stalwart Mail Server with Docker?
Yes. Stalwart Mail Server provides a Docker image, so you can run it on any Linux server with Docker and Docker Compose installed. The project README lists the image name and the environment variables to set.
What are the best alternatives to Stalwart Mail Server?
Popular self-hosted alternatives to Stalwart Mail Server include docker-mailserver, Postal and Mail-in-a-Box. Stalwart Mail Server itself is a self-hosted alternative to Twilio SendGrid, Mailgun and Gmail.
Is Stalwart Mail Server actively maintained?
The most recent commit to Stalwart Mail Server was on Oct 20, 2026 with 715 commits in the past twelve months. The latest release is v0.16.27, published Oct 18, 2026. It had 51 open issues on GitHub. appsgit's project-health label for it is "Active" as of Oct 26, 2026.