On 1/31/2025 10:31 AM, John Levine wrote:
More to the point, the whole point of making mutations reversible is so that recipient systems can recover the original signed message and intermediates can leave the From header alone, only making changes that they consider useful, like subject line tags, rather than defensive ones to avoid DMARC failures.
Except that this requires completely eliminating existing behavior and as we repeatedly have seen, transitions take decades, if we are lucky. So the premise of 'leave the From Header alone' is appealing but very unlikely, in practice.
But again, my original point on this sub-trhead is that Author: is trivial, not fragile, and based on constructs that have been used in email from its start. It does not address the larger problem, but it does address From field munging.
d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net bluesky: @dcrocker.bsky.social mast: @[email protected]
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