Firstly I am an Exchange newbie, I know next to nothing, I am doing this as a favour for one of my clients. They have a DC with Server 2003 and Exchange 2003 set up (set up before my time by another IT company). Two emails are not working properly, other are all good. When sending emails from outside their network to the admin email address (admin@company.com) it gets bounced back: Final-Recipient: rfc822;info@company.com
Action: Failed
Status: 5.1.4
X-Display-Name: Admin
All was working two days ago. On the server, under POP3 connector, admin@company.com is set to be delivered to “Admin”‘s mailbox. On the workstation, the account set up in Outlook 2003, is MS Exchange Account (Mailbox – Admin). I have checked with the ISP and all email systems on their end are fine. Other users on the network are receiving emails fine. Is there any more info I need to give? Am I in over my head on this one?