The InterServer DNS-based Blackhole List is a spam trap DNSBL. This list does not take spam reports from third-parties. All blocking is done based on email recieved to multiple spam trap email addresses.
After 5 days the ip is delisted. IPs which have been listed more than 4 times in a given month will be listed an additional 30 days.
Is the information on our site wrong or incomplete? You don't want us to monitor your blacklist? Or do you operate a similar blacklist? We would like to hear from you!