> The originating mail server could have a private address of, for > example, 172.17.1.60, for exmaple. It could then send that message > through another SMTP server that trusts the internal server. And now > you've got 172.17.1.60 in your headers as the originating server and > that doesn't (and shouldn't) reverse resolve.
I don't know anyone who's arguing that every hop in the header needs rDNS, but best practice *does* require that the host that makes the connection to an outside server should have full-circle DNS. THAT'S the server I want to check rDNS on, not the workstation that submitted the original message somewhere in the bowels of an RFC1918 network. -- Dave Pooser Cat-Herder-in-Chief, Pooserville.com "...Life is not a journey to the grave with the intention of arriving safely in one pretty and well-preserved piece, but to slide across the finish line broadside, thoroughly used up, worn out, leaking oil, and shouting GERONIMO!!!" -- Bill McKenna
