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msmtpPop
Free

Free software with no paid tier.

 Free

The open-source software is available without a license fee. Hosting, hardware and…

macOS, Linux, Command line Windows, macOS, Linux, Command line
  • Drop-in replacement for the sendmail command
  • Multiple accounts in one configuration file
  • Offers interactive composition and a scriptable command-line mode.
  • Sends mail only; it does not read or fetch messages
  • Configured through a text file with no graphical setup
  • Requires SMTP credentials or a supported sending-service account.
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: MIT
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 September 22, 2026

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