Looks like this is the default setting.
Did you manage to find a solution, we are using it to upload the warehouse information and would prefer not to automatically send to the customer with their invoice.
Nope. Nothing's been done.
My thoughts are:
-Don't have attachments auto email with the invoice. Have a checkbox next to them so you can tick them to include if you want.
-Allow each one to be opened when clicked on so you can see what you are about to send without having to cancel and go to "Attachments" and then go back to email and then click the red X to remove.
