Bill, do you use MS Exchange, and if so, what method of grey
listing do you use?
OpenBSD spamd can sit in front of anything, it's extremely lightweight (a
low end 1U server can easily handle a large number of messages) and
reliable, it also supports greytrapping (email [EMAIL PROTECTED] and get
blacklisted, this works well since spammers usually hit a number of
addresses in sequence so if you seed in some grey trap ones it'll end the
spam run quickly).
http://www.openbsd.org/cgi-bin/man.cgi?query=spamd-setup&sektion=8&arch=i386&apropos=0&manpath=OpenBSD+Current
http://en.wikipedia.org/wiki/Spamd
http://www.benzedrine.cx/relaydb.html
This is also a very effective method for dealing with viruses since the
majority do not attempt redelivery.
-Kurt Seifried
