projecthoneypot.org begins to have impact - Every ISP should read this
The honeypot project let every website or domain owner in the world cooperate with some simple code to catch spam and malware. It than tries to list the responsable IP addresses.
For Belgium it is succeeding in getting even more spamzombies than ever before. But it will work for any ISP in any country.
the list of Belgian spamzombies or misused mailservers is here
The RSS feed for the Belgian infected spamzombies (mostly)
Please participate if you can
or if you work at an ISP help clean up the mess afterwards