Within Settings-->Communications-->Text Message History, you can find a log of all text messages that were sent or that failed to send. Within this page, you'll see the following:
Contact: The name of the contact that received the message or was set to receive the message.
On Behalf of: The name of the student that the message was sent on behalf of.
Number: The phone number that was set to receive the message.
Status: This column will show if the message sent with success or if it failed. Hover over the icons to see more information. A checkmark indicates a sent message.
A triangle indicates an error.
The errors that will be indicated are that the number isn't a valid mobile phone number, the recipient isn't currently reachable via text message, or the user has opted out of text messages by replying with a 'STOP' message and they won't receive messages again until they respond with a 'START' message.
Created at: The date and timestamp of when the message was setup to go out.
Delivered at: This is the date and time that your text message was delivered at. If you created a message to be sent outside of your sending window (Ex. at 5:01pm when your window ends at 5pm), then your message will be sent after the blackout period has ended and at the start of your sending window the next day. This is a case where you would see a larger gap of time between the created at column and the delivered at column as shown below.
Show: Click here to see the details of the message that was sent.
When you click on show, you can see all of the message details displayed in the history page as well as the content of the message.