> -----Original Message-----
> From: Rolf E. Sonneveld [mailto:R.E.Sonneveld_at_sonnection.nl]
> Sent: Monday, August 02, 2010 2:47 PM
> To: Murray S. Kucherawy
> Cc: opendkim-users_at_lists.opendkim.org
> Subject: Re: Rejected messages from the mailing list
>
> I will try to make a start. My approach would be to make an inventory
> of
> the commonly used MIME header fields and parameters
> (RFC2045-2049+updates) and of the headers, most commonly used by DKIM
> to
> generate the signature (the SHOULD header fields of par. 5.5 of
> RFC4871). Would that make sense? It's impossible to make a complete
> list
> of all headers that ever can be used to sign, but 4871 uses a 'SHOULD
> NOT' for the other header fields, not mentioned in 5.5.
You'd not only need to specify which fields, but how to canonicalize them. Have a look at RFC4871 section 3.4.2; we're looking for a description of an algorithm something like that one.
> Is there any way we can gather statistics on this specific item?
You'd have to instrument verifiers to observe these differences and collect data on them. OpenDKIM can do that, but only if the signer uses "z=" tags.
Received on Mon Aug 02 2010 - 22:07:51 PST
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