[ietf-dkim] Re: ISSUE 1525 -- Restriction to posting by first Author breaks email semantics

[Charles Lindsey]

On Tue, 15 Jan 2008 22:54:17 -0000, Jim Fenton <fenton at cisco.com> wrote:


> We then are left with the dilemma of what to do when there is more than  
> one author.  One option would be to look up the practices of all of the  
> authors and combine them.

That seems like a good argument for choosing whichever of the From  
addresses has the same domain as given by the signature. Essentially, "at  
least one of the From addresses" should be un-suspicious. I might add that  
iff the Sender was different from that one From domain the rule might be  
different.

The one certain piece of information you start from is the domain that  
signed it. So that is the domain you should be looking up.

-- 
Charles H. Lindsey ---------At Home, doing my own thing------------------------
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   Web: http://www.cs.man.ac.uk/~chl
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