Hi,
If you want to disable them, you will have to edit the corresponding view and add a check to not call the display function of the field class but directly echo the value of the field.
Actually, a simple way would be to remove the field from the address form in CSS. The field value would still be displayed on the address view if you added it in the "address_template" view file.
The address_template file can only display address fields. You won't be able to add the email address there. Why are you trying to do that ? instead, you should edit the view file where address_template is loaded. There you will be able to load the email address.