How do i fix a specific email address in exchange2003 that cannot send or receive emails outside of my exchange domain? help

Hi, What happens when they try? Any NDR or similar to explain what the issue might be? Leif

Please compare the mailbox settings between the working mailbox and that specific problematic mailbox, see if there’s any difference Please increase the diagnostic logging of transport component on the exchange server, reproduce the issue, and then check if there’s any related event in the application log on the exchange server (Reference) If the test message stuck in the queue, please view the additional information on this queue via ESM (Reference)