You can fill in several email addresses per customer in the customer details. In this case, go to the menu ‘Customers’ and click on the name of an existing customer or create a new customer with the button ‘+Add’ in the top right-hand corner. The customer details will open. You can fill in your customer's email addresses in the field ‘Email’. Make sure that there's only one email address per line. You can start a new line by pressing the enter button. Next click ‘Save’ at the bottom.
As soon as you've saved several email addresses in the customer details a new tab ‘Send to’ will appear (next to 'History'). Click the tab to assign documents to the different email addresses.
You can select here which document should be sent to which address. Next click ‘Save’ at the bottom.