[ietf-dkim] Are lookalike domains like parent domains?

[Jim Fenton]

Steve Atkins wrote:
> On Apr 30, 2008, at 11:40 AM, Arvel Hathcock wrote:
>
>   
>> So, from the receiver side, I don't have a problem with the
>> "treewalking" - whether it stays or goes.  I don't see it's  
>> existence as
>> the huge problem that others do but if it disappeared tomorrow this
>> would not destroy the essence of ADSP (it would just increase it's
>> deployment complexity).
>>     
>
> It would increase deployment complexity for senders.
>
> It would decrease deployment complexity for receivers.
>   

That's true, but you also need to consider the nature and degree of 
deployment complexity required.

Senders who want full coverage would need to either add new ADSP records 
for all their hosts or deploy new (and, as far as I know, currently 
nonexistent) DNS tools to automatically publish ADSP records for all of 
their hosts.

Otherwise, eceivers would need to deploy an ADSP implementation that 
queries the parent domain, as currently described in SSP-03.  Other than 
that, they don't need to do anything special.

-Jim