> (BTW, the author also writes a regular newsletter about anti-spam that's 
a
> good read, too.  You can find it here <http://www.jgc.org/>.)

I've been reading his newsletter for some time now.  Excellent stuff, as 
is his Spammer's Compendium at <http://www.jgc.org/tsc/>.  One of the most 
complete list off dirty tricks used by spammers to get past filters I've 
seen.

So far, spam hasn't been a problem on any of our lists.  If it does, I'll 
just move the whole darn thing behind our spam filter.