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exchange 2010 email stuck in queue

Posted on 2013-06-28
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Last Modified: 2013-06-28
Greetings,

I moved a test user to a new 2010 server. Yesterday I set up connectors and was able to send and receive email internally and externally. However, today all emails from the test user are getting stuck in the queue. I am able to still receive emails.

Now, I do have two 2010 servers configured. I only set up the firewall for one email server (.5). The properties of the stuck emails show that the source IP is .15, which is the other email server. I am not sure why today emails are trying to be sent from that server. The .15 server is going to be a passive DAG server. I realize I may need to configure the firewall for that specific IP address, but I am unclear why it is trying to send out through it when yesterday it sent exclusively through the .5 server.

Another thing is that my 2003 server is configured to send out through the 2010 server and that is working without issue.

thanks for any insight.
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Question by:rpliner
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by:Amit
Amit earned 500 total points
ID: 39285426
It is due to HUB Transport, as it is load balanced automatically. Something similar we discussed in below question

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28156313.html

Workaround solution is to set  -SubmissionServerOverrideList
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by:rpliner
ID: 39285475
thanks. does it make a difference that my 2003 server is in the office and the two 2010 servers are in a data center? They are correctly configured in AD Sites and Services. Also, yesterday it sent exclusively from the .5 server, which  is where the mailbox is hosted, and it worked. why would it take a day to exhibit this behavior?

also, if I run that command, it will then send out from the hub transport server that the mailbox is on, correct? If that hub transport is not functioning for some reason, it will then try to send through hub transport 2, correct? Further, should i just configure the firewall to allow sending from the second server since exchange is designed that way and since it provides a bit of fault tolerance?

thanks again for the link
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Amit earned 500 total points
ID: 39285494
Yes, Firewall setting need to be fixed first. Rest Exchange 2010 enough intelligent to decide mail routing. Don't apply anything for now.
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by:rpliner
ID: 39285527
thanks. I will set up the firewall and monitor.
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