Is there any quick filter I can add to sendmail to
thwart their delivery?
This is becoming highly annoying.
Sellam, we use MimeDefang, which strips potentially harmful attachments. We
turn ours up a notch and just have it bounce emails with PIF, SCR, VBS, and
other attachments that pretty much only get emailed by viruses. We also use
SpamAssassin.
Another cool thing I've seen lately is KnowSpam.
http://knowspam.net/
--Patrick