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Incoming emails from a specific customer delay around 5 hours

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Hi all,

Server: SBS2008

Exchange 2007 SP2

For some reasons my colleague could not receive incoming email from one customers instantly as it should. The email delayed for about 5 hours and it rarely happens.

What I did was to check queue mail at that moment but nothing there. I tried to run MailflowTroubleshooter tool and received error below:

Any suggestions would be really appreciated!!!

Regards,

Peter
Peter Vo

Thursday, October 20, 2011 1:26 AM

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Hi
Do you install Symantec Endpoint Protection on SBS 2008 ?
   Symantec solution
   Set up the SMTP email settings as 127.0.0.1 - The server name or IP address
won't work.

Enable SMTP Authentication using the administrator username & password.
    I also find similar error case from forum. It is about certificates issue.
   http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/11a13691-b184-4fbf-8abc-3912a4fd2259
   According to our policy, you should post SBS thread to SBS forum.
   http://social.technet.microsoft.com/Forums/en-US/smallbusinessserver/threads
- Marked as answer by Terence Yu Friday, October 28, 2011 10:03 AM
Friday, October 21, 2011 2:30 AM

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You can always study the mail flow from email message's internet headers received by your colleague that always delayed 5 hours

Check the particular delayed email that arrived at the email gateway log if you have one and message tracking on the Exchange 2007 (e.g. EDGE,HUB, and Mailbox)
- Edited by shuen100 Friday, October 21, 2011 2:20 AM
Friday, October 21, 2011 2:20 AM
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Sign in to vote
Hi
Do you install Symantec Endpoint Protection on SBS 2008 ?
   Symantec solution
   Set up the SMTP email settings as 127.0.0.1 - The server name or IP address
won't work.

Enable SMTP Authentication using the administrator username & password.
    I also find similar error case from forum. It is about certificates issue.
   http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/11a13691-b184-4fbf-8abc-3912a4fd2259
   According to our policy, you should post SBS thread to SBS forum.
   http://social.technet.microsoft.com/Forums/en-US/smallbusinessserver/threads
- Marked as answer by Terence Yu Friday, October 28, 2011 10:03 AM
Friday, October 21, 2011 2:30 AM