Don Lee wrote:
CSV and David's _auth mechanisms do that check with much less effort and more
reliability than SPF --those mechanisms provide for denying an IP to send mail
for a given domain.
Can you explain? What is "CSV and David's _auth"?
Two methods designed for establishing who is authorized to relay mail
in a hierarchically authoritative fashion, i.e. using DNS "properly"
(as opposed to DNSBL non-hierarchical scheme.)
For more info, see
http://en.wikipedia.org/wiki/Certified_Server_Validation
http://open-mail.org/Registry.html
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