Robust remote e-mail sending
extsmail masquerades as the standard UNIX sendmail program, reading messages, and later piping them to user-defined commands.
In a sense, extsmail can be thought of as a very simple "tiny" sendmail (Think SSMTP, UUCP, ...)
A typical use is to allow e-mail to be piped via ssh to external server running a full sendmail-compatible MTA. extsmail is designed to have sensible defaults, and configuring it is a one-off, quick job.
These details are provided for information only. No information here is legal advice and should not be used as such.