They had something similar some years ago (I checked, it was about 10 years, I'm old). I think it was named Clutter. Iirc it moved mails from recipients you tend to delete right away into a separate folder that was very subtle in letting you know that it has new connect.
It was a huge hilarious mess because it moved all notifications people painstakingly set up for themselves to the Clutter folder since people mostly read the notification, acted and deleted it and the "logic" concluded that these mails must be irrelevant then.








I hope it's not :D