On 11/30/2015 8:21 AM, John Levine wrote:
>> 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
...
Probably relevant, current work:
Authenticated Received Chain (ARC)
https://tools.ietf.org/html/draft-andersen-arc-00
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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