I bet you don't have the Outgoing mail server requires authentication box checked....
I've been working on mine too. I logged into my godaddy account and found the set up guide for outlook express. I followed the guide and I can sent from it with no errors
http://products.secureserver.net/ema...ookexpress.htm
Incoming Server: pop.secureserver.net
Account Type: POP3
Outgoing Server: smtpout.sercureserver.net
Check the Outgoing mail server requires authentication box
Check the Use the same user name and password for sending e-mail too...
I do not have anything selected under the Advanced Server Settings menus
Jim