Not sure about "vague comment"s but anyone who has run an email server, used an rbl/rhsbl, and followed the logs <http://www.postconf.com/docs/spamrep/> would say the same. Having done so for years and run reports on dozens of servers daily it is clear that blacklists are the most effective form of spam blocking, by at least an order of magnitude.
Not sure about "vague comment"s but anyone who has run an email server, used an rbl/rhsbl, and followed the logs <http://www.postconf.com/docs/spamrep/> would say the same. Having done so for years and run reports on dozens of servers daily it is clear that blacklists are the most effective form of spam blocking, by at least an order of magnitude.