On Sun, Mar 30, 2025 at 3:40 PM Murray S. Kucherawy <superuser@xxxxxxxxx> wrote:
On Sun, Mar 30, 2025 at 2:54 PM Rob Sayre <sayrer@xxxxxxxxx> wrote:Well, if you have a MUST NOT, it's normative, right? That's not about the ABNF, but about the protocol, which you refer to with "We also said..."."In particular, cryptographic signature verification failures MUST NOT provoke 4xx SMTP replies."At a protocol level, DKIM operates just fine without knowing anything about SMTP at all.
I'm not sure that's realistic, though. Even the new effort has a normative reference to SMTP:
thanks,
Rob
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