On 7/21/2020 1:42 PM, Brandon Long wrote:
Stricter validation is not an uncommon addition to protocols over the last 45 years.
If there are examples of adding stricter validation in a way that essentially requires changing the semantics of the payload, in order for the payload to survive, I can't think of any. Not TLS, not DNSSec, not S/MIME or PGP.
DMARC essentially enforces a semantic on the From: field as a handling identifier, rather than an author identifier.
When activity that has a long history of semantic validity and a continued desire for operation is forced to break the denotational source of authoring information, in order to get the mail delivered, then we are in new territory.
d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
