installing anti-virus software

This document serves to remind me later what steps I took to get anti-virus software up and running on my FreeBSD 4.9-RELEASE-p1 system. I'm using the stock sendmail 8.12.9 that comes with FreeBSD 4.9-RELEASE (by my count it's at roughly patchlevel 2..) I also plan to only use one copy of the MTA rather than the more popular (but more resource intensive) dual-MTA setup. I'll be setting this up only with anti-virus at first, then adding SpamAssassin hooks later on. NOTE: This document is a work in progress and is not yet completed.