Exchange 2010 cannot receive emails after installing on a domain with an Exchange 2003 server

Posted on 2011-03-09
Last Modified: 2012-05-11
I have installed a new Exchange 2010 server that cannot receive emails from mailboxes hosted on an Exchange 2003 server.

I have verified that the permissions are setup to be anonymous, exchange users, exchange servers, and legacy exchange servers for both the default properties and the client properties in the console.

I do have an environment with a Barracuda Spam Firewall.  This is setup as a smart host on my exchange 2003 box.  

The Exchange 2010 box I have gotten to successfully be able to send emails to the internet and to the Exchange 2003 box.
Question by:lodgingsit
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Author Comment

ID: 35087761
The last statement, "The Exchange 2010 box I have gotten to successfully be able to receive emails from the internet and from the Exchange 2003 box."  Is written wrong.

I meant to say:
The Exchange 2010 box I have gotten to successfully be able to send emails to the internet and to the Exchange 2003 box
LVL 14

Accepted Solution

Kaffiend earned 500 total points
ID: 35089962
On your Exchange 2003 server, is the "Default SMTP Virtual Server" set up to use a Smart Host?  If so, then that is most likely the problem.  (Because Exchange 2003 communicates with other Exchange servers using SMTP)

If that is the case, you can fix this by removing the Smart Host configuration from the Default SMTP Virtual Server.  You can still keep the use of your Smart Host by creating a new SMTP connector.  See this discussion:

Author Comment

ID: 35095474
Thank you Kaffiend.  That solved the problem.  I took the smart host out of the default SMTP Virtual Server and created a new SMTP connector for it and it worked.

Author Closing Comment

ID: 35095480
One of those "Gotchas"  that this was really helpful with as it isn't documented too well on the internet.

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