iRedMail vs mailcow
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
mailcow
Dockerized full-stack mail server suite
| Feature | iRedMail | mailcow |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 82 · Excellent | 94 · Excellent |
| Category | Mail Servers | Mail Servers |
| License | GPL-3.0 | GPL-3.0 |
| Language | Shell | JavaScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 4,096 MB | 6,144 MB |
| Deployment | bare-metal | docker |
| GitHub stars | ★ 1,844 | ★ 13,498 |
| First released | 2007 | 2016 |
| Replaces | Microsoft Exchange, Google Workspace | Microsoft Exchange, Google Workspace |
What are iRedMail and mailcow?
iRedMail
iRedMail is a shell-script-driven mail server deployment that sets up Postfix, Dovecot, antispam, and webmail on major Linux and BSD systems. It supports OpenLDAP, MySQL, or PostgreSQL backends.
- Automated full mail stack install
- LDAP, MySQL or PostgreSQL backends
- SpamAssassin and ClamAV
- Roundcube and SOGo webmail
mailcow
mailcow is a complete, Docker-based mail server solution that bundles Postfix, Dovecot, Rspamd, SOGo, and a modern web UI. It makes running a full-featured mail server with antispam and webmail straightforward.
- Complete Docker mail stack
- Rspamd antispam built in
- SOGo webmail and ActiveSync
- Modern management UI with API
iRedMail vs mailcow: key differences
IRedMail is written in Shell, while mailcow is built with JavaScript. IRedMail is the lighter option, starting around 4,096 MB of RAM against 6,144 MB for mailcow. IRedMail is the more established project (first released 2007), while mailcow arrived in 2016. Mailcow has the considerably larger community, at 13,498 GitHub stars versus 1,844. Mailcow lists first-class Docker deployment; iRedMail does not.
Why pick each one
Choose iRedMail if…
- Works on many distros
- Long-standing project
Watch out for
- Admin panel features gated in pro edition
- Script-based, less reproducible
Choose mailcow if…
- All components preconfigured
- Active community
Watch out for
- Substantial RAM requirements
- Many containers to manage
Frequently asked questions
Is iRedMail or mailcow better?
Neither is universally better. mailcow has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are iRedMail and mailcow free and open-source?
Yes. iRedMail is licensed under GPL-3.0 and mailcow under GPL-3.0. Both can be self-hosted at no software cost.
Can I run iRedMail and mailcow with Docker?
iRedMail: check the project docs for container support. mailcow: yes.
Which is lighter on resources, iRedMail or mailcow?
iRedMail has the smaller minimum footprint at 4,096 MB of RAM, compared to about 6,144 MB for mailcow. Real-world usage depends on library size, user count, and enabled features.