Just finished setting up Exchange 2007 SP1 with all updates on Server 2008. We have an existing Exchange 2003 server running on Server 2003 that is running fine and are co-existing. We're ready to move mailboxes, so we moved a test user over to 2007 and found we can't send or receive as that user. Anything the user sends (Internal or external) just sit in the outbox. If we try to send to the user from outside, we receive an immediate NDR.
So far, no AV on the Exchange 2007 box. Exchange 2003 does have Forefront on it.
This is a typical Ex2007 install - there is no edge and the mailbox, client access and hub transport are on the same box.
Running BPA does not give us any errors or notices.
Did a fair amount of research online and read about back pressure. We're not receiving any errors regarding this. Our C: drive has about 10 gigs free, which is where Exchange is installed, and our E: drive has about 80 gigs free, which is where our data lives. Server has 4 gigs of memory.
The transport service is set to auto and is not running. Credentials are currently network service. Also tried as local system, no good. As domain admin, the service runs, but doesn't help.
Here is the only error we're receiving -
Log Name: Application
Date: 10/13/2008 7:55:16 PM
Event ID: 1009
Task Category: MSExchangeMailSubmission
The Microsoft Exchange Mail Submission Service is currently unable to contact any Hub Transport servers in the local Active Directory site. The servers may be too busy to accept new connections at this time.