SHSelfHostIndex

Docker Mailserver vs Postorius

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?
DO Docker Mailserver Production-ready, config-driven mail server in a container VS PO Postorius Web administration interface for Mailman 3
FeatureDocker MailserverPostorius
CategoryMail ServersMail Servers
LicenseMITGPL-3.0
LanguageShellPython
Setup difficultyMediumHard
Min. RAM2,048 MB512 MB
Deploymentdockerdocker, source
GitHub stars★ 18,682★ 200
First released20152012
ReplacesGoogle Workspace, Microsoft 365Google Groups

Why pick each one

Choose Docker Mailserver if…

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

Choose Postorius if…

  • Released under the GPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in Python
  • Lightweight — runs in 512 MB RAM
Postorius details

Frequently asked questions

Is Docker Mailserver or Postorius better?

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

Are Docker Mailserver and Postorius free and open-source?

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

Can I run Docker Mailserver and Postorius with Docker?

Docker Mailserver: yes. Postorius: yes.

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