Re: Exchange 2003 server can’t be reached!
this is not enough information to adequately help with your issue.
Is smtp runnin on your exchange server?
Does the windows firewall allow access to port 25?
Can you telnet to port 25 on your server from within your network?
Also you make mention that you have a Dlink router, Is your internet connection business or residential? (Some ISP’s block smtp traffic on residential lines.