There are two methods for establishing a connection for SLmail.
If you click the Dedicated Network Connection button in the Connection Method box, SLmail will assume that the Internet connection is already present and the portion of the dialog devoted to Dialup Networking is irrelevant and grayed-out.
If you click the Dialup Connection button on the Connection Method page and click Save, the Connection Options dialog box will become active and allow you to configure choices on how the connection should be made.