Re: [ietf-smtp] chained authorizationm, was Proposed Charter for the "SMTP Headers ...

["John Levine" <[e-mail]>]

>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