I finished installing Exchange 2003 on Windows 2003 Server(i called it xcmail), created accounts and everything.
I called it xxx.local as the domain and I created users and mailbox for it too.
But I got error from System Administrator when I use any account to send out external email (but sending internal is working):
"The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<xcmail.xxx.local #5.1.1> "
Can you tell me what I did wrong? Please help and thank you!