For web based e-mail, I know of OpenWebMail (Perl), IMP (PHP) and SquirrelMail (PHP). All three are in /usr/ports/mail . Of the three, I find IMP hardest to install, and OpenWebMail easiest. Ports will check dependencies if you need mod_php etc.
As for your Apache, if it is too clobbered up, why don't you re-install via
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