spam blacklist pop3 solution

[Adam Hardy <adam.ant@cyberspaceroad.com>]

I googled for this extensively and come up with nothing - I'm looking 
for a hard-core spam blacklist to remove the spam from my POP3 mailbox 
before I download it.

I'm using a PDA alot and the primitive software on it doesn't include 
any filtering, nor does my provider who runs the mailserver offer anything.

I heard that there is company offering some subscription service where 
they run a database of spam mail originating IP addresses, maintained on 
a continual basis by customers using (grit your teeth) an Outlook 
extension to submit new spam for blacklisting at any time.

This is automated so that customers who frequently correctly identify 
spam gain a ranking - customers with really high rankings can cause a 
new spammer to be filtered out within seconds.

Anyone heard of it, or an urban myth?

After finding nothing on google, I think I might be wrong about it being 
a pop3 mailbox cleaner. Perhaps it's Outlook-only.

Adam