SP: Sp4 and all patches
NO Exchange running on this machine(this is sitting in the DMZ just as a relay server)
Most domain fail with event ID 4000 Unable to bind to destination server in DNS. Sometime they go through fine. Event viewe is full of this message. If I relay it to our ISP it goes fine. I need to have this box deliver messages directly without having to go through the smart host/ISP.
Definitely not open relay. Only one other server can relay through this in addtion to my machine, which I am using to test.
I have no DNS problem. I am able to telnet to port 25 to yahoo's mail server just fine. I am able to telnet to this server from my machine to port 25 and submit a message but, it goes into the queue but, doesn't get delivered. If I stop and start smtp it may go through. some e-mails that I submitted yesterday haven't left the queue yet. I got this notice from the server.. It is still sitting in the queue.
This is an automatically generated Delivery Status Notification.
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipients has been delayed.