On 3/21/25 11:19 AM, Tobias Herkula wrote:
Best reason to run DKIM2 as a new protocol beside DKIM is that it will
be testing HELL to suddenly change the Header with new
Tags/Fields/Values, DKIM with elliptic curves instead of rsa
signatures is a good example why "upgrading" fails hard for adopters
of the update and I talked to enough people over the time that are
scared to move because of this.
DKIM already has a MUST requirement that unknown tags be ignored. I
don't think the proposed changes are analogous to something like an ECC
upgrade which requires agreement on both ends. If the receiver ignores
any new tags, it would just revert back to normal DKIM behavior. But we
don't have a concrete protocol proposal, so who really knows.
Mike
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