To Change the Email settings for SENT Faxes:

Login to your account and then navigate to "Settings" then "Sending Faxes.”  In the box labeled as "Email address(es) to notify for faxes SENT," you can add any email addresses you wish to be notified for all outbound faxes sent from this account, just put them each on a new line.  Using the radio buttons along the top you can indicate when a notification should be sent, such as if the fax fails, is successful, or both/either.  Using the checkboxes you can control the information that is included with the notifications as well.  

Any changes made will be saved after you click on UPDATE.