After an unexpected server shutdown our Exchange databases became corrupt and I had to run eseutil on them to get them to mount. Now they are mounted but new incoming messages are not being delivered. They are just staying in the "Local Delivery" queue which has a status of "Retry".
1. right-clicking on the queue and selecting "Force connection"
2. rebooting the server
3. Checking for a disconnected SMTP mailbox
4. Manually moving messages from the "Queue" folder to the "Pickup" folder.
5. Stopping the Default SMTP virtual server, and creating a new one.
This is on a SBS 2003 server.