I use the service quite a lot and receiving back the evidence for every email I send is a bit annoying. Is there a way to cancel this?
All paid plans include this option. If you are the administrator of an Extended or Scale plan, follow these steps:
As a license administrator, you can update the settings of any user from your group. You can do this individually, or update all them at once, from the Set up your group option. This option also allows you to set up a default configuration for new users.
If you are not in charge of your premium license, ask the administrator to do it for you.