On 21/07/2014 05:09, Miles Fidelman wrote: ... > Leaving aside the question of whether or not IETF should use a > workaround, I thought there was a mailman patch to deal with re-writing > from addresses for DMARC p=reject. No, it isn't selective for addresses from a domain with a p=reject policy. It's clearly unacceptable to rewrite addresses that don't need to be rewritten. In answer to Hector: I fully agree that rewriting From is a bad idea. I also agree that breaking mailing lists is a bad idea. The dilemma is choosing the least bad path until a good solution is defined. Brian