Section 6.1.1 says:
If the DKIM-Signature header field does not contain any of the tags
listed as required in Section 3.5 the verifier MUST ignore the DKIM-
Signature header field and return PERMFAIL (signature missing
required tag).
It would be good to list all of them in 6.1.1. From looking at 3.5, I
think the list is:
v
a
b
bh
d
h
s
Does that match the list in other people's minds?
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