I can't send e-mail via Outlook



I get the following error message.

The host 'derek.olson@xxxxxxx' could not be found. Please verify that you
have entered the server name correctly.
Subject 'test', Account: 'derek.olson@xxxxxxx', Server:
'derek.olson@xxxxxxx', Protocol: SMTP, Port: 25, Secure(SSL): Yes, Socket
Error: 11003, Error Number: 0x800CCC0D
.