This is the message I have when I open outlook.

The host 'mail.ayza.int' could not be found. Please verify that you have entered the server name correctly. Account: 'mail.ayza.net', Server: 'mail.ayza.int', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 1The host 'mail.ayza.int' could not be found. Please verify that you have entered the server name correctly. Account: 'mail.ayza.net', Server: 'mail.ayza.int', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D"
1001, Error Number: 0x800CCC0D"

The Answer is:.........

The host does not have a valid domain name; .int is not a domain name, it should be .co.uk - .com - .net etc.

In Outlook go to Tools – Account Settings
Highlight the account and click change (well thats what it is on my 2007 version) but you need to get into the properties of that account. Once you are in there, have a look at the server address. Change both to mail.ayza.net

Save it all, close outlook and try again.