Subject: [domainrep] rDNS identifiers

From: Jacob R Rideout <[email-masked]>
Date: Fri, 29 Jun 2012 12:37:29 -0600

I just read draft-ietf-repute-email-identifiers-04.

Has anyone on the list considered the use of the IPv4 (or v6) PTR rDNS
value as an
identifier? Or more strictly, a fully qualified domain name, that also
resolves to the
queried IP address.

I know of several filtering systems that make use of this identifier
as an identity
token to fix reputation.

Jacob Rideout
Product Manager, Anti-Spam
Return Path, Inc.