Murray S. Kucherawy wrote:
4 would include DKIM signing. I'd be fine with adding a SHOULD there.
SHOULD? You would specify a normative SHOULD for protecting a DKIM validation
with a(nother) DKIM signature?
This begs the question: why bother to do the first validation; why not simply
wait and let whoever would have validated the first instead validate the first?
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