Spamhaus.org?

[Bobc01]

Whats it all about and if an IP is listed, what effect can it have?

[virgohippy]

I dunno man, but looks like US spammers just aren't trying hard enough:

http://www.spamhaus.org/statistics/spammers.lasso

Only one US spammer in the top 10, and he's in the bottom third!

[virgohippy]

http://www.spamhaus.org/sbl/index.lasso

The SBL is queriable in realtime by mail systems thoughout the Internet, allowing email administrators to identify, tag or block incoming connections from IP addresses which Spamhaus deems to be involved in the sending or origination of Unsolicited Bulk Email (aka "Spam").

None, unless someone uses the info in their database as reason to block an IP?

[Bobc01]

The US is number 1 on the countries list
The UK is number 4, shame they all don't get busted for it.

http://www.spamhaus.org/statistics/countries.lasso

[chaze]

Spamhaus.org is the best one but lists will never be the way to block spam. It has to be spam box where they email replies with a code and if the code is entered in the reply email it is sent. I have ait on my emails and I get almost no spam.