I had to smile at the title for your posting, it sounds like a line from Monty Pythons.
I use this program from MailWasher, you can look at your emails on the server before you download them, if you don't like what you see you can delete them and bounce 'em back to the sender telling them your email address don't exsist.
It seems to work on most, unless the email address has been spoofed. It costs about twenty quid if you want to buy it. The free version will only handle one account.