Compare software

docker-mailserverMDaemon Email Server
Free

Free and open source.

 Paid

Commercial licence with renewals; a free 30-day trial is available.

Linux, Self-hosted Windows, Self-hosted
  • Whole mail stack in one container
  • Built-in antispam and antivirus
  • Self-hosted alternative to Exchange and Microsoft 365
  • Webmail, groupware and anti-spam in one package
  • No webmail or graphical admin interface
  • Needs Docker and DNS knowledge to run well
  • Runs on Windows only
  • Paid licence with renewal fees
Self-hosted Downloadable app, Self-hosted
Open source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.