Try going to www.mail2web.com. Most ISP email can be received there and you can delete the spam from that site without it ever going into your Inbox. I use it ALL the time nowadays. Plus I can access my e-mail from anywhere using that site.
On a similar topic: are all of you folks using
Ad-Aware? If not, there's a good chance that your computer is infested/infected with "Spyware", software that reports your web surfing habits to a central database. Ad-aware is a free program that seeks out and removes those programs. I highly recommend it.
As an aside, you'd be surprised what killing those apps does to improve performance and stability of your system. Each of those little apps eats memory and CPU cycles, you know?