I have installed a second Exchange 2003 server into my exchange organisation. Default install and I've changed its SMTP Virtual server to match the settings on the first server.
I've created a test account and moved it to the second server and encountered a strange problem. I can send email from this account and when tracked it gets routed through to the first server and sent. However when I send email to the account from either internal or external it doesnt go through and sits in the queue of the first server with the following message "The remote server did not respond to a connection attempt"
Neither machines are firewalled from each other, both machines can ping each other, both machines can telnet to port 25 of each other.
So pretty much new server can send mail but not receive.