On Wed, Apr 4, 2018 at 3:32 PM, Brandon Long <[email protected]> wrote:
> Hmm, I guess this means the set of required/optional fields now stretches > between the DKIM and ARC specs, eh? > > Is t the only one that's now optional? > > For Seal, I have i, a, s, d, b, cv (removed t based on this thread) > For AMS, I have i, a, s, c, d, d, b, h, bh > > Brandon > Looks like that was an unintended casualty of picking up more of the DKIM-based definitions when we restructured the ARC protocol between -06 and -07. At this point, I don't feel that it's critical to the evaluation of the ARC chain so making it optional seems reasonable. --Kurt
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