I have two Exchange 2003 servers, one configured as a frontend and the other as a backend. My goal is to have the outbound mail routing from the backend and then getting sent out of the front end. I configured a SMTP connector named "Internet" with a SMTP address space with an address of * and a cost of 1 that used the frontend as the bridgehead. I have not had a problem with this configuration.
Early last week, my SAN lost a hard drive where the Exchange store is located. My backend connects to my SAN via iSCSI and when the hard drive went out, all of the volumes became disconnected, thus denying access to the Exchange store from the server. Now, it took a couple hours but the SAN was repaired and the store reenabled itself just fine. Now here is the problem. After everything came back online, all mail that was outbound was stuck in my Internet queue on the backend. It sits in that queue and sends my user delay messages until it finally just fails and ultimately sends a non delivery report back to the sender. I can go back into the connector and change the bridgehead to the backend and mail will send out, but this is not the configuration that I desire. I would prefer that my frontend does all of the sending and receiving work and my backend simply sorts and stores the mail. Any thoughts as to why my backend is not routing any mail back to the frontend?