Damon wrote:

> How is this any different than what we are doing with
> reputation systems based on IP right now?

Maybe I'm only confused.  But apparently we have two groups
here, some interested in "DKIM pure" without SSP, and others
interested in DKIM + SSP.

A "DKIM pure" signer talking with an "SSP aware" verifier (or
vice versa) should still work, no matter what the SSP of the
2822-From domain says.

> If I were a less than honorable person, I would send all my
> spam using someone with a good reputation (goodrep.com) as my
> DSD. My sig fails because I purposely munged it, there is no
> policy saying that this should definitely be rejected.
> Because goodrep.com can not publish all of the domains that
> it signs for, it is helpless to do anything about this.

Yes.  In theory goodrep can check your SSP, but a "DKIM pure"
signer might not like this.  Somebody proposed off list, that
goodrep should have a list of 2822-From domains it signs.  I'm
not sure about this, is it acceptable for "DKIM pure" signers ?

There is no procedure in 4409 for "check the 2822-From", it
only offers a "MAY add Sender" option.  Should signers "know"
what they are signing - beyond their "normal" authentication ?
The "MAY add Sender" option is already far from "normal", as
far as I can judge it (i.e. based on about five MSAs :-)

Frank


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