Binary package “qmail” in ubuntu precise
a secure, reliable, efficient, simple message transfer agent
qmail is meant as a replacement for the entire sendmail-binmail system on
typical Internet-connected UNIX hosts.
This package is based on the netqmail distribution of qmail, put
together by a motley krewe of qmail contributors (see the README).
It is derived from Daniel Bernstein's qmail-1.03 plus bug fixes,
a few feature enhancements, and some documentation.