>If you're relaying the email on to somewhere else then you're assuming >that there's a mechanism by which your policy regarding SPF becomes >known to those other people. > >I'm unaware of such a mechanism existing at the moment --
That's more or less what Authentication-Results and the deprecated Received-SPF headers do, recording a snapshot of what the SPF results were at the time a message was relayed. The ARC proposal in draft-andersen-arc-00 adds a signed chain of A-R trace headers. But again, SPF and A-R and ARC don't do the same thing as Received, which is why we have different headers for them. R's, John _______________________________________________ Shutup mailing list [email protected] https://www.ietf.org/mailman/listinfo/shutup
