On Apr 7, 2009, at 17:28, "Jim Fenton" <fen...@cisco.com> wrote:

> Siegel, Ellen wrote
>>>>
>>>>
>>>
>>
>> [> ]
>>
>> I think it may be the "incompatible" that's causing the  
>> disagreement. ADSP is not incompatible with that signing  
>> configuration, it would just require that a second signature be  
>> added.
>>
>> Maybe something more like the following?
>>
>> "ADSP should not be used for domains that use "i=" values to enable  
>> a parent domain to sign for a subdomain (as described in section  
>> 3.8 of [RFC4871]) unless an additional signature where the "d="  
>> domain matches the "i=" domain is added."
>>
>
> Good thought, but since parent domain signing is largely to simplify  
> key
> management (so that the public keys don't need to be published in each
> subdomain), it's not necessary to apply a parent domain signature if a
> signature where the d= value matches the actual From domain is also  
> applied.
>
> But you're right, "incompatible" may be a little harsh; I just  
> followed
> John Levine's wording in -09.  How about:
>
> Informative Note:  DKIM signatures by parent domains as described in  
> section 3.8 of [RFC4871] (in which a signer uses "i=" to assert that  
> it is signing for a subdomain) do not satisfy the requirements for  
> an Author Domain Signature as defined above.
>
> -Jim
>

Works for me.

Ellen

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