>Quoting Nathaniel Borenstein [1]: > > "One man's blacklist is another's denial-of-service attack." > >Email reputation services have a bad reputation. They have a good enough reputation that every non-trivial mail system in the world uses them. They're not all the same, and a Darwinian process has caused the best run ones to be the most widely used. There seems to be a faction that feel that 15 years ago someone once blacklisted them and caused them some inconvenience, therefore all DNSBLs suck forever. I could say similar things about buggy PC implementations of TCP/IP, but I think a few things have changed since then, in both cases. R's, John