Other sections in this FAQ:
FreeBSD
On FreeBSD, /usr/sbin/sendmail is a symbolic link to /usr/sbin/mailwrapper; it doesn't contain the Sendmail binary. How should I replace Sendmail with Exim on FreeBSD?
A script that FreeBSD runs nightly uses mailq with the -Ac parameter. Why doesn't Exim recognize this?
How can I use Exim for authenticated SMTP using Cyrus on FreeBSD?