OpenSMTPD
Secure SMTP server implementation from the OpenBSD project.
- GitHub stars
- 586
- License
- ISC
- Latest release
- 7.9.0p0
13 September 2026 - Last commit
- 14 September 2026
- Runs on
- C, Debian packages
Commits per month, last 12 months
61 commits
How to self-host OpenSMTPD
OpenSMTPD runs on C and Debian packages. 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 OpenSMTPD free?
Yes. OpenSMTPD is open source under the ISC license, so you can use it without paying for a license. You pay only for the server it runs on.
Can I self-host OpenSMTPD?
Yes. OpenSMTPD runs on C and Debian packages. Follow the install guide in the project's documentation, or use a host that installs it for you.
Is OpenSMTPD still maintained?
The last change to OpenSMTPD's code was on 14 September 2026, with 61 commits in the last 12 months.
Topics
App data from awesome-selfhosted (CC BY-SA 3.0), stars and activity from GitHub.