[Mac-the-T]

I find that Mailwasher doesn't deter repeat offenders, in most cases. I found the only way to shake off these gits is to leave all of your spam on the server. It seems that if it appears that there has been no activity in your email account for a couple of weeks then they decide its a dead account and go away, for a while at least.
I use a program like Poptray to preview my messages on the server. Any I need to open properly in OE I forward to another email account.