ietf-dkim
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[ietf-dkim] Ticket #19

2011-04-26 16:15:36
*... Recognizing the role of a signer can be important for inferring the
semantics of any signed content.

* A signature can be identified as pertaining to an aliasing or resending MLM
if the domain-part of the List-Post field matches the signing domain.


I think I understand the intent, here, and I'm supportive of the goal.  However 
the text is technically invalid.  A DKIM signature has only one meaning, 
relative to existing, formal specification.

"Inferring" meanings beyond what is defined is very, very far outside of the
scope of DKIM and it isn't documented anywhere, including the MLM document.

To the extent that there is a desire to specify additional, standardized 
semantics when an MLM adds a signature, that requires an additional, 
standardized specification (and almost certainly an additional, standardized 
header field...)

The best I can suggest is something along the lines of noting that
assessment-level heuristics can be aided by certain choices of signature d= 
names.  And then specifying what they might be, so that both signers and 
verifiers know how to encourage success for the heuristics.

mumble.

d/
-- 

   Dave Crocker
   Brandenburg InternetWorking
   bbiw.net
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