The SMS Send Record Tab shows you data on the outbound messages that you have sent(MTs).
The SMS Send Record tab does not automatically refresh. To update the list of sent messages to the latest, click on the Update Status button. The SMS Send Record tab only shows data from send packages that are still in memory. Usually, this will be the last immediate send and one or more deferred sends. The send packages are identified by the date and time that they went out. Select the date and time of the send package that you are interested in. If your account and the carrier that the message was sent on supports automatic delivery status, you will see the delivery status of each send. If you account does not support automatic delivery status, you may retrieve the status by clicking the Delivery Status link at the end of each row. Note that delivery status may not be kept for more than 24 hours.