It appears that Scott Kitterman <[email protected]> said: >My vague recollection is that the reason not to use Sender (implicit or >explicit) as the key for ADSP and later DMARC was concern that some MUAs >didn't display the >explicit Sender (mostly Outlook Express, IIRC). The original Yahoo! >DomainKeys had some sort of a policy component that keyed off Sender. I >haven't gone back and looked >anything up to be sure, so no promises.
That was part of it. Also remember there was Microsoft's Sender-ID which had the "Purported Responsible Address" to use for validation which was (from memory perhaps slightly garbled) resent-sender else resent-from else sender else from. Microsoft has a patent on PRA with liceensing terms that made us stay away from the whole idea. R's, John _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
