That fucking Martijn Bevelander spammed all my .nl email adresses for ages. I sent hundreds of complaints to
[email protected], never got a response. Most of the spam was for bestiality sites listed with only the IP address, doing a whois was the only way to find out where it was coming from. In the end I didn't even write complaints any more, just immediately forwarded 20 copies of each spam to
[email protected], and it finally stopped.