Follow the steps below to delete an email account.
Step 1 - Navigate to the email section
After you have logged in to your cPanel account, navigate to the email section and click on the link that reads "Email Accounts"
Step 2 - Delete the account
Look for the list of all the email accounts and click on the link that reads "Delete", next to the account you wish to delete.
A new section will open once you have clicked on the link. Click on the button that reads "Delete" to delete the account. Remember, this will delete the account and all email associated with that address.
You have now delete the account.