A fallback means of filtering spam is having SpamAssassin installed. This gives users acquainted with the software the ability to control their own destiny with respect to mail handling. Ugh, I sound like a marketeer, but like dealing with those cretins, nothing involving dealing with spam is particularly pleasant. You will need to set up a .forward|.procmailrc to utilize SpamAssassin. Like so:
.forward --------- "|IFS=' ' && exec /usr/local/bin/procmail -p || exit 75 #USERNAME" .procmailrc ----------- :0fw | /usr/local/bin/spamassassin -P :0: * ^X-Spam-Status: Yes SPAM
This will put all the email which SpamAssassin deems spam in a folder under ~/Mail (which is where Procmail defaults to creating it)
Needless to say, if I catch you spamming, your ass is GRASS.