extsmail

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Overview

extsmail masquerades as the standard UNIX sendmail program, reading messages, and piping them to user-defined commands until sending succeeds. It is particularly useful if you want to send email via commands that assume a fault-free network, for example via msmtp (to an external SMTP server) or ssh (to a server running a full sendmail-compatible MTA). extsmail is not a full SMTP server. It doesn't need root privileges. It can run as a daemon, or as a batch job (e.g. via cron). It is designed to have sensible defaults, and configuring it is a quick, one-off job.

Download and docs

• Download the latest release (includes installation instructions)
• Documentation:
  • Manual
  • FAQ
  • Configuring other apps to use extsmail
  • Exotic scenarios using extsmail
• Man pages:
  • extsmail(1)
  • extsmail.conf(5)
  • extsmail.externals(5)
  • extsmaild(1)
• Related programs

Credits

extsmail was originally created by Laurence Tratt. Olivier Girondel has been a major contributor since v1.8.