Every recipient that is sent a review request via SMS is logged in a report.
To check the the unsubscribe log:
1. Click on Menu > Reports > All Reports.
2. In the Lead Management Reports section, click "Text History."
3. The Text Message History Report will appear.
The date range dropdown can be used to filter the results. You can also show or hide columns in the report with the "Choose Fields" button. A spreadsheet of the report can be exported with the "Export CSV" button.