Sendmail and Postfix

[Walter Hurry]

A little digging around has revealed that there are two 'mailq' 
executables on my system: /usr/local/bin/mailq and /usr/bin/mailq.

The first is part of the mail/postfix-current port which I have installed 
and use, and the second is presumably part of Sendmail, which I have not 
installed and do not use.

It seems that Sendmail is embedded somehow in the base system. What is 
the 'approved' way to get rid of /usr/bin/mailq? Or better, remove 
Sendmail?

Sorry if this is a newbie question; I am as yet relatively unfamiliar 
with FreeBSD, being a refugee from GNU/Linux.

This is FreeBSD 9.0-RELEASE, by the way.