We have three possible protocol modes: 1) Evaluator using RFC 7489 with any domain owner policy 2) Evaluator using DMARCbis with domain owner publishing policies based on RFC 7489 only 3) Evaluator using DMARCbis with domain owner publishing policies based on DMARCbis
We know that the first mode is subject to organization consolidation and fragmentation based on PSL errors We know that the second mode is also subject to organization consolidation and fragmentation errors, based on missing policy tags. We have an opportunity to eliminate organization consolidation and fragmentation errors completely, for communication using the third mode, by asking the domain to add a DMARCbis tag to each DMARC policy. When tags are uniformly applied and internally consistent, the evaluator has the right answer and knows that he has the right answer. This is a big win. Yet this does not seem to be a goal of our present text. Indeed, the discussion has resisted moving in this direction. Why would we not want to eliminate risk wherever possible? Doug
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