On Wed, Mar 19, 2025 at 10:49 AM Jim Fenton <fen...@bluepopcorn.net> wrote:
> I agree that the single-address-per-envelope model doesn’t have that > problem. But I wonder if it might make it a little easier for > implementations to operate only on the message header and not the envelope > itself, so perhaps having the receiving MTA copy the envelope address into > a trace header field would be a good idea. But you know much more about > implementing DKIM than I do. This is probably the one thing that really distinguishes this new effort as being a new thing rather than a DKIM extension of some kind: It relies on there being a leak of information between SMTP and the message content. STD 76 observes that separation, but this new thing relies on reaching across that line. -MSK
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