Desktop Central 7 Mail Server setting

Desktop Central 7 Mail Server setting

Any one can tell me how to set up the Mail server in system. We are using Exchange  server 2007, When I input the Server name, should I just key in the DNS name of my exchange server? ie. "CPPMMS01", any port # should use for Exchange server or use the default port 25?. The email type should be SMTP and no TLS enable. Beside should I turn requires authentication, and what is the different on use the authentication or not?
 
Raphael

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