The information you enter for your .Mac account in the .Mac preference panel (see Figure 1-1) is automatically used by your email client, which by default is set to use Apple's Mail application. This makes it really easy for you to start using your Mac.com email account quickly.
To check Mail's settings, launch the Mail
application (/Applications) and select Mail
→ Preferences (or use its keyboard shortcut, -,) from the menu bar. When the
preferences window opens, you'll see
Mail's General settings, as shown in Figure 1-3.