To delete an email account on your iPhone that you no longer use (or don’t want to appear), do this:
Figure: A typical email account screen
- From the Home screen, tap Settings. The Settings screen appears.
- Tap Mail, Contacts, Calendars. The Mail, Contacts, Calendars screen appears (see Figure above).
- Tap the name of the account you want to delete. That account’s screen appears.
- Scroll down and tap Delete Account, as shown in Figure 32-5. Another Delete Account button appears.
- Tap Delete Account.
- Press the Home button
You need to use the "The Settings application" What To set up an email account on your iPhone. Read more: http://www.bench3.com/2010/08/setting-up-email-account-in-iphone.html#ixzz0xoiVifYT
