Bacula is a set of computer programs that permit you (or the system administrator) to manage backup, recovery, and verification of computer data across a network of computers of different kinds. In technical terms, it is a network client/server based backup program. Bacula is relatively easy to use and efficient, while offering many advanced storage management features that make it easy to find and recover lost or damaged files. This package contains Bacula server daemons.

A secure, effective and simple way of getting mail off a system to your mail
hub. It contains no suid-binaries or other dangerous things - no mail spool
to poke around in, and no daemons running in the background. Mail is simply
forwarded to the configured mailhost. Extremely easy configuration.

WARNING: the above is all it does; it does not receive mail, expand aliases
or manage a queue. That belongs on a mail hub with a system administrator.