Docker Mailserver vs Modoboa
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Docker Mailserver | Modoboa |
|---|---|---|
| Deploy effort | ≈5-minute setup | Under-an-hour setup |
| Health score | 96 · Excellent | 88 · Excellent |
| Category | Mail Servers | Mail Servers |
| License | MIT | ISC |
| Language | Shell | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 2,048 MB |
| Deployment | docker | docker, bare-metal |
| GitHub stars | ★ 18,872 | ★ 3,538 |
| First released | 2015 | 2010 |
| Replaces | Google Workspace, Microsoft 365 | Google Workspace, cPanel Email |
What are Docker Mailserver and Modoboa?
Docker Mailserver
Docker Mailserver is a single-container mail server built on Postfix and Dovecot with no external database. It is configured entirely through files and environment variables for a reproducible setup.
- Single container, no database
- Postfix and Dovecot core
- SpamAssassin and ClamAV integration
- File-based configuration
Modoboa
Modoboa is a mail hosting and management platform that provides a clean web interface on top of Postfix and Dovecot. It includes antispam, webmail, calendar, and DNS health checks.
- Modern mail administration UI
- Amavis and Rspamd antispam
- Built-in webmail and calendar
- DNSBL and configuration health checks
Docker Mailserver vs Modoboa: key differences
Docker Mailserver is written in Shell, while Modoboa is built with Python. Licensing differs — MIT for Docker Mailserver versus ISC for Modoboa. Modoboa is the more established project (first released 2010), while Docker Mailserver arrived in 2015. Docker Mailserver has the considerably larger community, at 18,872 GitHub stars versus 3,538.
Why pick each one
Choose Docker Mailserver if…
- Reproducible, version-controllable config
- Lightweight
Watch out for
- No built-in webmail
- Requires comfort with mail concepts
Choose Modoboa if…
- Friendly management interface
- Good monitoring features
Watch out for
- Installer can be finicky
- Multiple components to maintain
Frequently asked questions
Is Docker Mailserver or Modoboa better?
Neither is universally better. Docker Mailserver has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Docker Mailserver and Modoboa free and open-source?
Yes. Docker Mailserver is licensed under MIT and Modoboa under ISC. Both can be self-hosted at no software cost.
Can I run Docker Mailserver and Modoboa with Docker?
Docker Mailserver: yes. Modoboa: yes.