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