How to Set Opt-Out Rules in RCS
Login to Your MSG91 Panel - Go to the RCS channel from the dashboard.
Navigate to Opt-Out Rules - After opening the WhatsApp channel, click on "Opt-Out Rules" from the left-side menu. Select the Project ID for which you want to set the opt-out rule.
Create a New Rule - Click on "Create New Rule" located at the top-right corner. A pop-up will open where you can add keywords such as STOP, UNSUBSCRIBE, etc.
Note: The numbers that opt out will be shown in the blacklist.