It would be good if it was possible to target a marketing list when "test-sending" a Marketing Email, so that several people can receive the test-email and evaluate it. Currently it is only possible to enter an email-address in free text when clicking "Test Send" on the Marketing Email form. 

In Dynamics Marketing is was possible to create a Marketing List and check "enable for testing" on the list to make it possible to target this list when testing marketing emails. A similar function in D365 Marketing would be a welcome addition.