When you are finished with your Web-Based Email, you can log off of the email client. If you are using a public computer, you should log off of the email client and clear the cookies from the computer. For more information about clearing cookies, see Clearing Cookies After Logging Off of Web-Based Email.
To Log Off of Web-Based Email
You can also set an Inactivity Timeout through the Settings menu of Web-Based Email.
To Set the Inactivity Timeout