Compare software

chasquidExim
Free

Free and open source under the Apache 2.0 licence.

 Free

Free and open source under the GNU General Public Licence.

Linux, Self-hosted Linux, Self-hosted, Command line
  • Secure defaults that prevent open relays
  • Virtual domains with per-domain users and aliases
  • Very flexible mail routing
  • Extensive checks for incoming mail
  • Aimed at individuals and small groups rather than large deployments
  • Needs Dovecot or similar for mailbox access
  • Configuration is complex and differs from Sendmail
  • A mail server, not a client for reading email
Downloadable app, Self-hosted Downloadable app, Self-hosted
Open source Open source
License: Apache-2.0 License: GPL
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked September 24, 2026

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