This publicly available DNS blacklist is permanently regenerated by the NiX Spam project of the German IT magazine iX. It contains IP addresses of spam senders and hash values (fuzzy checksums) of incoming spam. The blacklist can be used to protect mailservers against spam. But checking a single DNSBL should not be the only criterion for spam.
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!
We keep some statistics on blacklists. Below is the graph for ix.dnsbl.manitu.net. We test blacklists by asking them to respond to known IP's that are blacklisted and known IP's that can't be blacklisted. Not every blacklist has such IP's, we test them with what is possible. We keep if we get any response or error messages and the response duration. Lower response times are better. These statistics may be useful for email server administrators to pick which blacklist to use.