1. In the case of non-delivery to recipients in a circular, a red error icon is displayed on the face of the message as shown in the message list
2. On the message itself, the nature of the error is displayed, also in red
3. Clicking on the circular “all recipients” icon reveals the list of recipients to whom the circular message was sent
4. Scrolling down this list will show to which recipient(s) the message was not delivered, as well as the reason why. In this case, the message was not delivered to ABCDE Shipping, it bounced