[ietf-dkim] ADSP Informative Note on parent domain signing

[Jim Fenton]

Douglas Otis wrote:
>
> On Apr 6, 2009, at 4:36 PM, Jim Fenton wrote:
>
>> There remains some disagreement on whether the "informative note"
>> contained in the last paragraph of the text I proposed on March 27
>> should appear in the ADSP draft.  The note said:
>>
>>> Informative Note:  ADSP is incompatible with DKIM signing by parent
>>> domains described in section 3.8 of [RFC4871] in which a signer uses
>>> "i=" to assert that a parent domain is signing for a subdomain.
>>
>> This would replace the Note in draft-ietf-dkim-ssp-09, section 2.7.
>
> ### This note is not correct.  The incompatibility is not dependent
> upon the i= value, which might be omitted.
>
> Informative Note:  ADSP is incompatible with DKIM signing by parent
> domains described in section 3.8 of [RFC4871] when a parent domain
> signs for a sub-domain within an email-address.  ADSP requires the
> From email-address domain (Author Domain) and the signing domain
> (SDID) to be the same.
>
But what section 2.7 talks about has to do with the use of the i=
value.  Without the i= value, Parent Domain Signing (as defined there)
doesn't exist.

Have a look at the alternate wording I proposed in response to Ellen's
message and let me know what you think of that.

-Jim