Please follow the steps below to delete an email account.
Step 1 - Navigate to Emails
Navigate to the emails section of your account and click on the link that reads "Manage Accounts".
This will take you to a page that lists all of the email accounts currently active on your domain. This will look similar to the image below :
Step 2 - Delete the account
Click on the link that reads "Delete" next to the account you wish to delete. Please note that this will delete all emails that has been stored on this account.
You will see a confirmation section to confirm the account deletion, as illustrated below :
Click on the button that reads "Delete" to finally delete the account.