Scott Kitterman wrote:
I think this needs reputation and/or accreditation to work. Not simple.
The simple model is a white list plus one of SPF HELO PASS or a verified
3rd party DKIM signature (3rd party = forwarder = HELO). Or any other
way to figure out if HELO forwarder.example really is forwarder.example.
Another model is "trusted-forwarders", it has the accreditation part. If
you want to share the costs of white list management and SPF evaluation
with others check out draft-irtf-asrg-iar-howe-siq-03.txt
Forwarders could switch from push (SMTP) to poll (POP3) if they hate SRS,
but I digress.
Frank
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