I had a single existing Exchange 2003 server to which I have added a second on the same domain. My goal is to move about half of the mailboxes to the second server, but I can't seem to get the second server to receive any emails. I have added some test accounts to the second server, and they show up in Active Directory and Exchange System Manager on the first server. I can send emails to accounts outside our domain from the accounts on the second server, but I can't receive any from the first exchange or outside our domain or send any to the first exchange. How can I troubleshoot this problem?