Compare software

Mail-in-a-BoxiRedMail
Free

Free and open source, self-hosted on your own server.

 Free

Free and open source, self-hosted.

Linux, Self-hosted Linux, Self-hosted
  • Automates the entire setup of a mail server stack on a single Ubuntu box
  • Open source, so the full setup can be audited and self-hosted
  • Long-established project with broad Linux and BSD distribution support
  • Automates installation of a full mail stack in one script
  • Requires comfort running and maintaining a Linux server
  • Tied specifically to Ubuntu, limiting deployment flexibility
  • Requires server administration skills to deploy and maintain
  • Text-based installer is less approachable than fully containerized alternatives
Self-hosted Self-hosted
Open source Open source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 22, 2026

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