If you want to receive a notification on reaching your disk quota, bandwidth usage limit or wish to update the cPanel's contact information, follow these steps.
1. Log in to your cPanel account.
2. In the Preferences section, click on Contact Information.
3. Add or update your primary email address to receive account notifications and password reset confirmations. You can optionally add a secondary email address.
4. Enter your cPanel password and click Save. 
Your email address has been updated.