Dovecot vs mailcow
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Dovecot
Secure, high-performance IMAP and POP3 server
VS
mailcow
Dockerized full-stack mail server suite
| Feature | Dovecot | mailcow |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 83 · Excellent | 94 · Excellent |
| Category | Mail Servers | Mail Servers |
| License | MIT | GPL-3.0 |
| Language | C | JavaScript |
| Setup difficulty | Hard | Medium |
| Min. RAM | 128 MB | 6,144 MB |
| Deployment | docker, bare-metal, source | docker |
| GitHub stars | ★ 1,255 | ★ 13,498 |
| First released | 2002 | 2016 |
| Replaces | Microsoft Exchange | Microsoft Exchange, Google Workspace |
What are Dovecot and mailcow?
Dovecot
Dovecot is an open-source IMAP and POP3 server for Linux and Unix systems, written with security as a primary goal. It is the mailbox-access component of most self-hosted mail stacks.
- High-performance IMAP/POP3
- Sieve filtering support
- Flexible mailbox storage formats
- Strong security focus
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
Dovecot vs mailcow: key differences
Dovecot is written in C, while mailcow is built with JavaScript. Licensing differs — MIT for Dovecot versus GPL-3.0 for mailcow. Dovecot is the lighter option, starting around 128 MB of RAM against 6,144 MB for mailcow. Dovecot is the more established project (first released 2002), while mailcow arrived in 2016. Mailcow has the considerably larger community, at 13,498 GitHub stars versus 1,255.
Why pick each one
Choose Dovecot if…
- Very efficient and reliable
- Industry standard
Watch out for
- Configuration is complex
- Mailbox access only
Choose mailcow if…
- All components preconfigured
- Active community
Watch out for
- Substantial RAM requirements
- Many containers to manage
Frequently asked questions
Is Dovecot or mailcow better?
mailcow is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Dovecot if its specific feature set fits your needs better.
Are Dovecot and mailcow free and open-source?
Yes. Dovecot is licensed under MIT and mailcow under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Dovecot and mailcow with Docker?
Dovecot: yes. mailcow: yes.
Which is lighter on resources, Dovecot or mailcow?
Dovecot has the smaller minimum footprint at 128 MB of RAM, compared to about 6,144 MB for mailcow. Real-world usage depends on library size, user count, and enabled features.