[ietf-dkim] I sign nothing / only only 3rd party / some mail

[Michael Thomas]

Hallam-Baker, Phillip wrote:

 >Just thought:
 >
 >You do need 'I sign nothing' since you need to be able to terminate 
searches for DKIM policy records regardless of whether we use the 
extended prefix scheme I propose or some variant of tree walking.
 >

Actually this seems like a good point: it's a discovery marker much more 
than
policy marker. This sort of folds in with the nicety of having this sort 
of stuff
around for forensic purposes.

Is there any discovery related requirement here other than the "must 
complete
in deterministic number of steps" one that we all seem to agree on?

       Mike