a good site for you
http://www.freshports.org/You can locate any port using their search engine which is really easy.
Seems like you will need two more package, one is
http://www.freshports.org/mail/p5-Mail-Sendmail/mail /p5-Mail-Sendmail
and the other is
http://www.freshports.org/mail/p5-Mail-Tools/mail/p5-Mail-Tools/
to obtain these you, simply:-
cd /usr/ports/mail/p5-Mail-Se
ndmail
make install clean
cd /usr/ports/mail/p5-Mail-To
ols/
make install clean