So at the moment you can manually create an order with one email address for notifications.
However, some trade customers may want procurement and the warehouse to receive notifications of shipments. I as a business owner also need my account manager for that customer to get a notification. Another customer of ours will have a different account manager who needs a notification as well etc etc
Therefore, an option to add more than one email address for shipment notifications. 2 email addresses would good but more than 2 would be excellent.