SHSelfHostIndex

Docker Mailserver vs MailCatcher

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 MA MailCatcher Catch-all SMTP server for inspecting test email
FeatureDocker MailserverMailCatcher
CategoryMail ServersMail Servers
LicenseMITMIT
LanguageShellRuby
Setup difficultyMediumEasy
Min. RAM2,048 MB128 MB
Deploymentdockerdocker, binary, source
GitHub stars★ 18,682★ 6,774
First released20152010
ReplacesGoogle Workspace, Microsoft 365Mailtrap

Why pick each one

Choose Docker Mailserver if…

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

Choose MailCatcher if…

  • Released under the MIT license
  • Easy to set up — beginner-friendly
  • First-class Docker support for quick deployment
  • Mature project with 6.8k GitHub stars
MailCatcher details

Frequently asked questions

Is Docker Mailserver or MailCatcher better?

Neither is universally better. Docker Mailserver has the larger community, while MailCatcher is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.

Are Docker Mailserver and MailCatcher free and open-source?

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

Can I run Docker Mailserver and MailCatcher with Docker?

Docker Mailserver: yes. MailCatcher: yes.

Related comparisons