> Bret Miller wrote:
>> Received: from [] (HELO [])
>> by mail.wcg.org (CommuniGate Pro SMTP 5.1.11)
>> ...
>> Meaning that there was no RDNS for

Actually, CommuniGate sometimes does that even when RDNS _is_ available.

For example:

Received: from [] (HELO smtp-prod-mx2.ucsc.edu)
by copper.ucsc.edu (CommuniGate Pro SMTP 5.1.7) is one of my own machines, and it DEFINITELY has RDNS.

I have yet to figure out what all of the different predictable formats
are for CommuniGate's Received headers. It is, unfortunately, something
that CommuniGate hasn't seen fit to formalize and publish.