Meng,
MWW> MAIL FROM:<bounces(_at_)citibank(_dot_)com>
MWW> Resent-From: <noSPFrecord(_at_)clueless(_dot_)com>
MWW> From: <service(_at_)citibank(_dot_)com>
MWW> Given that clueless.com does not publish an SPF record, an
MWW> MTA operating solely on a PRA algorithm will let the message
MWW> through because the result of the PRA evaluation is "none".
That's not a PRA issue.
You are suggesting a behavior that goes far outside of the PRA
specification and is strictly within the spf/sender-id specification.
d/
--
Dave Crocker <dcrocker-at-brandenburg-dot-com>
Brandenburg InternetWorking <www.brandenburg.com>
Sunnyvale, CA USA <tel:+1.408.246.8253>