"Hallam-Baker, Phillip" <pbaker@xxxxxxxxxxxx> wrote: > Only the receiver of an email has any right to decide how their spam > filter is going to work. Sure, but the intent of the sender, and/or owner of the SPF record matters, too. Common consent makes the net work. Otherwise, people could send HTTP GET requests to an MX, and claim it's their "valid" interpretation of MX records. If a recipient doesn't want to use SPF records in the way the publishers intended, that's their right. But they shouldn't claim that their interpretation is compliant. If the SPF authors believe that another proposal has an incompatible interpretation of SPF records, then that belief should be relevant to the discussion. Otherwise, any large company can DoS the IETF by publishing incompatible interpretations and/or implementations of proposals they don't like. Alan DeKok. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf