I get at least 100 emails per day through my ntl account, and i got to the stage whereby i would willingly pay to have all the spam deleted.
So i hit google and found
http://www.spam-stop.co.uk this company POP3's your email down from ntl, deletes the spam (viewable on their website) then you just POP3 the mail down from their server.
The amazing thing is, it actually works, I was very surprised and best of all it is free atm, but they are thinking of charging £5/month in the future, which i would gladly pay to save at least 30 minutes a day going through spam.
Since i've done this, i've not had any spam. The only thing that was marked as spam when it wasn't was regular mailing list stuff from dabs and tomshardware, so i set those to always allow on the website.