Once the test deliveries have been sent, you can check which recipient(s) they have been sent to and whether or not they were opened.
To find out which recipients have been targeted, open a delivery via the campaign dashboard and click the Delivery tab.
To find out whether the delivery has been opened, go to the Tracking tab.
Compare with the other delivery.
In our example, delivery B has scored the highest open rate. This means that content B will be used for the final delivery.