On Apr 9, 2013, at 11:28 AM, SM <sm@xxxxxxxxxxxx> wrote: > Hi Keith, > At 09:56 09-04-2013, Keith Moore wrote: >> You have it backwards. Internet email has long been under DDoS attack from email address reputation services. > > Quoting Nathaniel Borenstein [1]: > > "One man's blacklist is another's denial-of-service attack." > > Email reputation services have a bad reputation. In some respect it is similar to the email delivery problem where the smaller set of good people are negatively affected because of the larger set of "bad" people. > > Regards, > -sm > > P.S. You are the only participant who has been able to override the existing consensus during a Last Call. :-) > > 1. http://www.ietf.org/mail-archive/web/ietf/current/msg29826.html Dear SM, In full agreement with Nathaniel. Avoiding unfair collateral blocking is why source domain authentication, not authorization, is vital. Regards, Douglas Otis