Nowadays your computer may send spam even without your will.
It is enough to infect your computer with a computer virus - and voila, your computer joined BotNet.
As statistics says - 85% of spam is generated by 6 botnets.
System administrators know that computer can be infected even without any actions from the user's part. A lot of viruses from internet just scan permanently for all accessible IP's to find those, that can be infected.

This site is dedicated to gather statistics about IP's and providers that run malicious software, that attacks web servers.

If you are a system administrator yourself and you have time and wish to update this database - please fill free to contact us.