ssmtp: ssmtp (Extremely simple MTA to get mail off the system to a Mailhub)
ssmtp:
ssmtp: A secure, effective and simple way of getting mail off a system to
ssmtp: your mail hub. It contains no suid-binaries or other dangerous things
ssmtp: no mail spool to poke around in, and no daemons running in the
ssmtp: background. Mail is simply forwarded to the configured mailhost.
ssmtp: Extremely easy configuration.
ssmtp:
ssmtp: WARNING: the above is all it does; it does not receive mail, expand
ssmtp: aliases or manage a queue. That belongs on a mail hub with a system
ssmtp: administrator.