On Sep 9, 2013, at 1:48 PM, Andreas Schulze <[email protected]> wrote:

> Am 09.09.2013 13:27 schrieb Olga Gavrylyako:
>> Unless you provide me an example, I cannot say why it did not pass
>> our validation.
> you should have received a message from me via dnswl.org ...

Dear Andreas,

DKIM can produce a pass with a message having an invalid message structure.  
Unfortunately, there are no email conventions to indicate whether message 
structure had been checked.  Message structure details are now contained in 
many RFCs and not just RFC5322 and RFC5321 recommends against SMTP checking 
message structure as this handling is less problematic when not implemented 
within the transport.  As such, no safe conclusions can be reached based upon a 
passing DKIM signature.  Google is rather unique in how they handling messages 
that have repeated singleton header fields.  IMHO, such checks should have been 
part of what makes a valid DKIM signature.

Regards,
Douglas Otis




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