Ah-ha! If you using OL 2000 or 2002 then Outclass is a subset of POPFile that installs as a OL plugin. POPFile must be installed first -- WITH the optional Perl components -- but doesn't need to be running (in fact SHOULDN'T be running concurrently). Free (GPL), looks professional & cool, well documented - worth a look at
http://www.vargonsoft.com/Outclass/
"Outclass has been tested with Outlook 2000 and Outlook 2002 using Exchange, POP3, and IMAP mail, on Windows 2000 and Windows XP and with POPFile v0.18.1. Outclass can manually handle Hotmail accounts in Outlook 2002, but does not automatically classify Hotmail email at this time."
Run in tandem with Mailwasher? Just love the GPL....!
Keygrip, add the following line to MailWasher's filters.txt
[enabled],"Blank Subject/Sender",Filtered,16711680,AND,Blacklist,Delete,Subject,conta ins,.,From,contains,.
Haven't tried it yet but it's so trivial that it has to work.