To delete an email account on a legacy BlackBerry configured for BIS (BlackBerry Internet Services) with a POP, IMAP or OWA configuration, take the following steps:
1. From Home, click the Setup icon.
2. Select Email Accounts.
3. Select Internet Mail Account.
4. Select the applicable email account. Press the Menu key, then Delete.
5. Click Yes to confirm the email account deletion.
Note: This will only remove the email account from the BlackBerry device. If you need to delete your BlackBerry Internet Services account entirely, please contact your wireless service provider.