> -----Original Message-----
> From: John Levine [mailto:[email protected]]
> Sent: Tuesday, October 11, 2011 9:11 PM
> To: [email protected]
> Cc: Murray S. Kucherawy
> Subject: Re: [marf] New Version Notification - 
> draft-ietf-marf-authfailure-report-03.txt
> 
> This draft is a great improvement.
> 
> I would strongly suggest changing the text to say there must be exactly
> one authentication-results header in the report.  If there's more than
> one, particularly if there are multiple DKIM failures, there's no way
> to tell which other parts of the report go with which a-r header.
> 
> Note that multiple DKIM failures could easily have multiple reported domains,
> multiple auth-failure, dkim-domain, dkim-identity, dkim-selector,
> dkim-canonicalized-header, and dkim-canonicalized body.  (Remember that
> there are two different ways to canonicalize each.)
> 
> Rather than inventing complex rules about which item goes with which
> report, if you have three failures, send three reports.

An Authentication-Results field can list several different DKIM failures if the 
message was multiply defined.  That makes the other DKIM-* fields important, as 
they make it clear which one the report is covering.

It would be easy to group repeated DKIM-* fields together, separated by blank 
lines, to allow relaying DKIM forensics about each, but separately.  Is that 
too complex?
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