How do I make sure my exchange server is not acting as an Open Relay?

When ever a recipient from my site trying to send an email to a recipient @aol.com. He/she will receive a message saying Delivery to the following recipients has been delayed. Then a few days later he/she will receive another message saying The following recipient(s) could not be reached: I

RE: How do I make sure my exchange server is not acting as an Open Relay?

I checked, and didn't see that you are running as an open relay. Perhaps the problem you are having is Reverse DNS? I know that AOL requires a Reverse DNS record if you want to talk to it. I had to add it into my records before they would talk to me :) Bob Sadler City of Leawood, KS, USA

RE: How do I make sure my exchange server is not acting as an Open Relay?

Ditto on that. The same thing happened to my domain. John Parker, MCSE ---End of Line--- -Original Message- From: Bob Sadler [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 2:35 PM To: Exchange Discussions Subject: RE: How do I make sure my exchange server is not acting as an