On 12/2/20 12:31 PM, John R Levine wrote:
On Wed, 2 Dec 2020, Michael Thomas wrote:
Ignoring the existing usage of DKIM, DKIM+A-R would only work for a
single hop, and lead to some complication compared to the other DKIM
signatures already on the message.
Wait, what? a DKIM signatures survives until it encounters an
intermediary that alters the message in a breaking manner.
Arc-Signatures are no different in that respect. In fact as far as I
can tell they are identical modulo the i= difference.
Please reread the ARC spec. The ARC-Authentication-Results at level N
tells you whether the ARC and DKIM signatures were good at level N-1.
That's why I said "modulo the i= difference"
Mike
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