The Email Campaigns Preferences screen can be accessed from your dashboard by clicking on the ellipsis [ ⋮ ] on your Email Campaigns App and selecting Preferences.
This will take you to the Preferences screen for Email Campaigns and it holds the Default Opt-Out Message that appears at the bottom of every email that gets sent out from the app.
The preferences menu allows you to customize the default message that appears when you open the Create Email Content screen. You can still edit the message within that screen.
Note: If you choose to alter the default message, do not change http://urlforoptout/. If you alter this line, the opt-out link will not be generated.
Click Save All Changes to save your changes. These preferences will take effect immediately.