I wrote about this before when we were calling them Facebook’s Hidden Messages but they are now called Other Messages and, when you click on your Messages tab in the left hand sidebar of the Home page of your personal profile, you will see the two options.
One for your Inbox and the other for Other, but you are now able to put a filter on how the two of them work.
Basic Filtering
You can either select the recommended Basic option where you will ‘Mostly see
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