[ietf-dkim] Which tags are required?

[Barry Leiba]

> 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.

While we're here, I'll point out something I missed until Paul set this 
sentence out separately: the sentence's negative is done badly, leaving 
it open to misinterpretation (it looks like it means "if NONE of them 
are there").  I think this works better:

"If any tag listed as 'required' in Section 3.5 is missing from the 
DKIM-Signature header field, the verifier [...]."

"Omitted" might be better than "missing"; I'm not sure.

Barry

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Barry Leiba, Internet Messaging Technology  (leiba at watson.ibm.com)
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