On 6/11/2014 4:56 PM, John R Levine wrote:
>> If a receiver cares about 'strength' (or perhaps robustness) of
>> signatures, they should pay attention to that.
> 
> It is my impression that the idea here is that a signature with t= isn't
> interesting unless there's a matching signature with d=.  Or did I
> misunderstand that.

It is provided because there is a -Delegate enabled, yes.  On the other
hand, the concern that the token signature will get used when it
shouldn't essentially means it is interpreted without awareness of
-Delegate.

Hence this is merely the case of two, competing signatures and deciding
which to choose.

That's a generic DKIM issue, and its resolution depends on the DKIM
evaluation.



> You are of course correct that senders have always been allowed to
> create weak signatures, but until now there has been little incentive to
> do so.

Hence my citing 'salience'.

d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net

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