We've an old exchange 2003 server which got some issue, we set up a new exchange 2003 server and moved all the mailbox over then we shutdown the old server. However when people send email to the distribution list the email stuck in the query forever, and if we turn on the old server then the email will went. Are we missing any setting and why the DL not working without the old server?
Upgrade to Exchange 2007/2010 not possible at the moment(no budget).
Thanks for your help.