On Sat, Mar 11, 2023 at 01:54:01AM +0100, Steffen Nurpmeso via Postfix-users
wrote:
> - sign the entire message as for now,
You're confusing the message and the envelope.
> - but include a "cramped=1" tag that signals that all receivers
> are actually covered by the DKIM signature, so
The envelope is not part of the signed message, and the envelope changes
in transit, and is knowable to the message signer when the message is
first submitted to the mail system.
Whatever problem you're trying to solve, it has nothing to do with
DKIM.
--
Viktor.
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