Here's how I did it company wide:
install perl module dependancy for sa-update:
# perl -MCPAN -e "install Archive::Tar;"
start up spamassassin:
# /etc/init.d/spamd start
create global procmail rule like this:
LOGFILE=/var/log/procmail.log # send mail thru spamassassin :0 fw * < 256000 | /usr/bin/spamc -f -u $LOGNAME DROPPRIVS=YES # All mail tagged as spam (eg. with a score higher than the set threshold) # is moved to "spam". :0: * ^X-Spam-Status: Yes $HOME/mail/spam
Don't forget to bootstrap SpamAssassin:
# chkconfig --add spamassassin # chkconfig spamassassin on
Now all your users' mail that scores a 5.0 or greater (default settings) will go into a folder named 'spam'. Now isn't that nice.