How Do I Customize General Preferences?
How Do I Set the General Preferences in Mail?
How Do I Set the Layout of the Messages in my Inbox?
How Do I Enable Automatic Forwarding of Messages?
How Do I Set a Vacation Message?
How Do I Set Identity Settings for my Local Account?
Sender identities are tightly integrated with external profiles that you configure on WebMail to collect emails from other accounts. When you set WebMail to collect email from external accounts, an identity is created for you and is added under the Identities node in the Mail preferences. The identity is removed when you delete the account setting for collecting external mail. See How do I Remove an Existing External Account?
Note - The default identity cannot be removed.