Mail server recommendations?

[Kenneth]

I'm beginning the process of learning about MTAs, MUAs, and whatever all
those other acronyms are.  I have never had the need to set one up, and still
don't really have a need but I thought I would add to my knowledge.

What are some good packages I should be looking at?  I did a quick install of
qmail on Gentoo, but it doesn't seem to want to start up, it's looking for a
whole bunch of files in /var/qmail/control that don't exist.  I'm not
knocking qmail for this, at least yet.  I still have to look over the
documentation more thoroughly, probably something I didn't do.


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