On 9/7/2014 10:02 AM, John Levine wrote:
I don't know of anyone who does message
rejection based on DKIM signatures

Google and Yahoo say that they use DKIM signatures as part of reputation
assessment.  That's distinct from any use of DMARC.

Oh, sure, but now that's just part of content based analysis: look at the message text, add special sauce, and decide whether to deliver to the inbox or the spam folder.

I suppose we can put DKIM in the very small category of content analysis that could still be useful with encrypted mail bodies, along with some checks for header defects typical of spambots.

R's,
John

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