It was thus said that the Great Roger Merchberger once stated:
Why is the most secure MTA not included with every Linux distro? DJB's
license is (at best) wonky, to preserve his codebase & help alleviate
techsupport nightmares, and as it's not "Open Source" with fully
redistributable binaries, none of the linux vendors (except Gentoo, which
compiles stuff on the fly) will touch it.
And it requires the creation of six user accounts *just* to run the mail
system, plus it has a different management program than inetd (or xinetd) to
make it annoying for Unix admins (okay, *this* Unix admin). Also, it's
support for virtual domains is ... kludgy (from what I remember).
-spc (Postfix, on the other hand, it quite nice ... )