On Monday we were able to receive emails.
We were having problem with one of our software (FIleMaker Server) so we uninstalled it and then reinstalled it. That was the only changes mde to the server. That should not affect Exchange 2004. We are running SBS 2003. We are able to send/receive emails from within the network. We are able to send emails out of the network(I tested it). The sender from outside the network receives a NDR when they send emails to us. How can I correct this so we can receive emails. No changes were made to the server.