Exchange 5.5. I have relaying restricted to only my internal network. There are a few domains that I had to allow to relay to. Example, system somewhere remote needs to send an alert. The computer connects to my SMTP server over the net and tries to send the alert and hits a wall. I enter in mydomain.com to ignore restrictions and all is well. But the systems manager at the remote site wants the e-mail as well so I enter his domain to ignore restrictions and all is well. Tested it and if there is any other domain in the e-mail list for the alert, the entire thing gets dumped and no one is alerted. This is what I wanted. So back to the problem, I am seeing since last week alot of NDR's sent to my postmasters mailbox that (somerandomgarbage)@mydomain.com could not be delivered. Most of them come from AOL addresses. Now am I being relayed thru? What should I look at first? From my slight knowledge I am secured from relaying because I cannot get a remote machine to relay thru my server. But I know there is always a way.
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