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

[Jim Fenton]

Steve Atkins wrote:
>
>> It seems like the treewalking would help to address stuff like  
>> this....?
>>     
>
> Not in general. It will help only in the case where there are only one
> level of hostnames below the top level domain. It won't help in
> the cases where that's deeper.
>   

It still helps, it just doesn't make it possible to cover the entire 
multilevel domain with a single ADSP record; you need to have a record 
for each subdomain (one level up from the leaf nodes in the tree).  But 
are still substantially fewer records that need to be published in this 
case.

> People whose work environments consist solely of three level
> hostnames see it as a magic bullet. Those who don't, see it as
> a hack that adds complexity for recipients without buying the
> senders any functionality they didn't already have via less
> intrusive methods.
>   

Intrusive?  How does this intrude?

-Jim