On 2/10/23 10:23 AM, Wei Chuang wrote:
Hi all,
I've posted an updated version of the
draft-chuang-dkim-replay-problem-01
<https://datatracker.ietf.org/doc/draft-chuang-dkim-replay-problem/01/>
draft. It cleans up a lot from the -00 rough draft state so hopefully
it's more clear. It builds a case that spammers are exploiting DKIM
through replay, identifies conflicting scenarios, and outlines a
solution space.
-Wei
PS Many, many thanks goes to Dave Crocker for his editorial advice.
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| Transmission through an Inbound Filtering Service
I think it should be made clear that SPF will fail if checked on any
receiver farther downstream from the MX record. I think that's really
what's going on here, and has little to do with filtering services, etc.
Mike
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