Just started using pop3proxy, a SpamAssassin pop3 proxy server that's usable on Windows (like, wow). It looks very promising.
And here I thought I had to write one myself
Of course, my second thought was to build some kind of tray-gizmo to monitor the proxying and despamming of my beloved mail. And maybe, if it's okay with McD, build an
Making Perl look good, that's good.