I've just finished going through my Thunderbird Junk e-mail folder, adding spam-sending IP addresses to the tomjepp.co.uk sendmail reject list (over 200 of them), and I saw some patterns in the dust...

I've prepared a pie chart of the distribution of IP addresses that send spam to me:

It shows clearly that most of my spam comes from several key IP ranges (e.g. 20x.*.*.*).

I guess that one of those large ranges is Korea...

Here is my current (03/06/05) sendmail reject list. Feel free to use it as you deem necessary.