Spamhaus Blacklists With REVLY
The Spamhaus Project is responsible for compiling several widely used anti-spam lists. Many internet service providers and email servers use the lists to reduce the amount of spam they accept.
Spamhaus distributes the lists in the form of DNS-based Blocklists (DNSBLs) and Whitelists (DNSWLs). The lists are offered as a free public service to low-volume mail server operators on the Internet.