Keygrip - my sympathies. After reading your post I tried playing around in Outlook to see if I could creat an appropriate filter but failed - it doesn't seem possible to write regexes using the OL Wizard though it MAY be possible to do so directly in the Registry or OL's application data _IF_ OL can deal with regexes at all. This site
http://www.davidgagne.net/archives/003191.shtml#003191 has some references that seem to imply that it could by done by writing a
VB plugin of OL and another that indicates it is possible using C++ and the Exchange SDK. Sounds like too much PT unless you're a real hacker.
I installed MailWasher a couple of weeks ago 'cos I couldn't cope with the spam deluge any longer. I have to say that it works a treat. The FAQ includes a URL to an excellent list of filters
http://www.w5hq.com/MailWasher/MailWasherFilters.txt that work extremely well with little modification.
"..I wonder if an untitled/no address email could be taught as a blacklisted ID." Writing a MailWasher regex filter for this should be trivial - I'll try it later today and post it if it works.
POPFile looks REALLY interesting - thanks DistantRumble!
Incidentally, I have been trying to find info. on the usefulness or not of bouncing spam - opinions seem fairly evenly divided. Some say that it's useless because most of the return addys are false anyway and it just further congests the Net. Others think it may help. I dunno, I've been bouncing all that cr@p for 2 weeks now and it shows no signs of abating.