Haraka
Fast, highly extensible, and event driven SMTP server.
- Email Servers
- JavaScript
- MIT
- Actively maintained
GitHub stats
- GitHub stars
- 5,613
- Forks
- 715
- Open issues
- 0
- Commits, last 12 months
- 84
- Last commit
- Oct 3, 2026
- Latest release
- v3.3.4Sep 5, 2026
- Created
- Mar 10, 2011
Data from the GitHub API, refreshed daily.
About Haraka
Fast, highly extensible, and event driven SMTP server. Haraka is open source under the MIT license and written mainly in JavaScript, so you can read the code, run it on your own hardware and keep full control of your data.
The project has 5,613 stars and 715 forks on GitHub, with 84 commits over the last year. It installs natively rather than through an official Docker image, so plan for a short manual setup.
Topics
- smtp
- mta
- javascript
- spf
- dkim
- nodejs
- haraka
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What is Haraka?
Haraka is a free, open-source app you can host on your own server, listed in our Email Servers category. Fast, highly extensible, and event driven SMTP server. The source code lives at github.com/haraka/Haraka, where it has 5,613 stars.
Is Haraka free and open source?
Yes. Haraka is open-source software released under the MIT 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 Haraka with Docker?
Haraka does not list an official Docker image. It installs natively (Nodejs), so follow the install steps in its README or look for a community-maintained container.
What are the best alternatives to Haraka?
Popular open-source alternatives to Haraka include docker-mailserver, Postal and Mail-in-a-Box. Haraka itself is a self-hosted alternative to Twilio SendGrid and Mailgun.
Is Haraka actively maintained?
The most recent commit to Haraka was on Oct 3, 2026 with 84 commits in the past twelve months. The latest release is v3.3.4, published Sep 5, 2026. Check the open issues on GitHub to gauge how quickly maintainers respond.