Find "Internet Mail Account"
Press the Menu key twice.
Scroll to Setup and press the Navigation key.
Scroll to Email Accounts and press the Navigation key.
Scroll to Internet Mail Account and press the Navigation key.
Delete email configuration
Highlight the required email account and press the Navigation key.
Scroll to Delete and press the Navigation key.
Scroll to Yes and press the Navigation key to confirm.
Exit
Press Disconnect.
Press the Return key to return to standby mode.