We have Exchange 2010 setup and allow our internal servers to relay through exchange. We noticed that a web server was sending duplicate emails and after testing exchange with the Mail Flow Troubleshooter I was able to reproduce the duplicate emails being sent by Exchange. I first use Expected messages from senders are delayed or are not received by some recipients. When it ask for recipient and sender address I have used both to our internal domain and for external domains with same results. Everything checks out good until running the Mail Acceptance Test and that is when i see the Mail submission failed: Error message: The SMTP host was not specified...but the test email has been accepted TWICE and that is causing the duplicate emails.
For the most part exchange seems to be working fine except for this one detail. Our webserver was giving us errors like the mail server was not responding in a fast enough. But after running this test it seems to not be responding to the submitted mail correctly. Not sure what to do Please help.
Thanks
Lead Pusher
UPDATE:
I was able to get the error to go away during the Mail Acceptance test but now I am getting 3 duplicate messages when running the test.. One for each Receive connector. My error was related to the Client recieve connector not have the exact internal IP of the Exchange server. I have had multiple receive connectors set up before in Exchange 2007 exactly the way I have Exchange 2010 setup. Why am I getting multiple emails sent from Exchange.
Thanks
