SHSelfHostIndex

Courier Mail Server vs Docker Mailserver

A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
CO Courier Mail Server Integrated mail server with IMAP, POP, and webmail VS DO Docker Mailserver Production-ready, config-driven mail server in a container
FeatureCourier Mail ServerDocker Mailserver
CategoryMail ServersMail Servers
LicenseGPL-3.0MIT
LanguageCShell
Setup difficultyHardMedium
Min. RAM512 MB2,048 MB
Deploymentbare-metal, sourcedocker
GitHub stars★ 13★ 18,682
First released20002015
ReplacesMicrosoft ExchangeGoogle Workspace, Microsoft 365

Why pick each one

Choose Courier Mail Server if…

  • Released under the GPL-3.0 license
  • Written in C
  • Lightweight — runs in 512 MB RAM
Courier Mail Server details

Choose Docker Mailserver if…

  • Reproducible, version-controllable config
  • Lightweight
Docker Mailserver details

Frequently asked questions

Is Courier Mail Server or Docker Mailserver better?

Docker Mailserver is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Courier Mail Server if its specific feature set fits your needs better.

Are Courier Mail Server and Docker Mailserver free and open-source?

Yes. Courier Mail Server is licensed under GPL-3.0 and Docker Mailserver under MIT. Both can be self-hosted at no software cost.

Can I run Courier Mail Server and Docker Mailserver with Docker?

Courier Mail Server: check the project docs for container support. Docker Mailserver: yes.

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