> A signature cannot be an assertion of any particular anti-spam policy.
I agree with that, but will go further. A signature cannot be an assertion of goodness. A signature can say things like "Alice wrote this message" or it can say "Bob resent this message to Carol" or it can say "MTA foo.example.com forwarded this message to Dave". A signature can even say "Ed attests that this message contains only content about topic category Y" or "Fred attests that this message relates to your transaction Z". What a signature cannot meaningfully say is "this is something you should read", because every signer will use his own criteria for that, and the signer will bias those criteria in his favor. There can be more than one kind of signature, but the meaning of each kind of signature needs to be standardized for the signatures to be useful as any more than an indicator of "I once saw this hash of this set of bits". Keith _______________________________________________ ietf-dkim mailing list http://dkim.org
