Standard Posts covers reports sent by email-in, text-in, mobile app or API for notifications sent to groups in your network via Web, Email, TTS (text-to-speech), voice broadcasts and social media.
*NOTE: may not cover all the above, depending on what services you purchased
Navigate to the Reports menu at the top of the page
Next click on the Standard Posts
Here you will find a summary of all posts on the network, and if you hover over the space after when each was sent, you can access the menu to view the report or view the post:
You can also sort each column from this page or search for a specific message by clicking on the magnifying glass and searching specifics.
The View Report link will bring you to a summary report showing how well the message was received: