Cyrus IMAP
Cyrus IMAP is an open-source, self-hosted app in the Email Servers category, licensed BSD-style (CMU) license with attribution clause and written mainly in C. It has 652 GitHub stars and its last commit was on Oct 24, 2026 (data as of Oct 26, 2026).
- Email Servers
- C
- BSD-3-Clause-Attribution
- Active
GitHub stats
- GitHub stars
- 652
- Forks
- 176
- Open issues
- 227
- Commits, last 12 months
- 2,849
- Last commit
- Oct 24, 2026
- Latest release
- cyrus-imapd-3.12.4Sep 9, 2026
- Created
- May 18, 2016
- License
- BSD-style (CMU) license with attribution clauseOpen source
Data as of from the GitHub API. Report an error
Project health
ActiveActive: last commit Oct 24, 2026, 2,849 commits in 12 months.
- Regular releases7 releases in 12 months
- Welcomes contributors6 open good-first-issue or help-wanted issues and a contributing guide
- Security policyPublishes a security policy on GitHub
| Last commit | Oct 24, 2026 |
|---|---|
| Commits, last 12 months | 2,849 |
| Latest release | cyrus-imapd-3.12.4 (Sep 9, 2026) |
| Releases, last 12 months | 7 |
| Releases, all time | 177 |
| Open issues | 227 |
| Open pull requests | 117 |
| Good first issues | 4 |
| Contributing guide | Yes |
| Security policy | Yes |
| Created | May 18, 2016 |
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 Cyrus IMAP
Email (IMAP/POP3), contacts and calendar server.
Description adapted from awesome-selfhosted (CC BY-SA 3.0). Source code: github.com/cyrusimap/cyrus-imapd.
Repository preview
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Is Cyrus IMAP free and open source?
Yes. Cyrus IMAP is open-source software released under the BSD-style (CMU) license with attribution clause 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 Cyrus IMAP with Docker?
Cyrus IMAP does not list an official Docker image. It installs natively (C), so follow the install steps in its README or look for a community-maintained container.
What are the best alternatives to Cyrus IMAP?
Popular self-hosted alternatives to Cyrus IMAP include docker-mailserver, Postal and Mail-in-a-Box.
Is Cyrus IMAP actively maintained?
The most recent commit to Cyrus IMAP was on Oct 24, 2026 with 2,849 commits in the past twelve months. The latest release is cyrus-imapd-3.12.4, published Sep 9, 2026. It had 227 open issues on GitHub. appsgit's project-health label for it is "Active" as of Oct 26, 2026.