On 2 Jun 2020, at 13:01, Dave Crocker wrote:
There's no reason that DMARC couldn't have included the sender or
tried to have some kind of
PRA like spf v2... but that's not the goal.
But the Sender: field is not reliably present and, of course, DMARC
needs an identifier that is reliably present.
Dave, could you explain that? Coding-wise, there's surely no reason that
an implementation can't say, "if 5322.sender is present then sender =
5322.sender else sender = 5322.from". So you could say that the
identifier of sender is reliably present, since it's taken from
5322.from if 5322.sender isn't present. But maybe I'm missing something.
Please explain.
pr
--
Pete Resnick https://www.episteme.net/
All connections to the world are tenuous at best
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