Notification message

Good morning, recently we stopped working with Quicktext which (among other things) provided us with messages form guests via Booking.com. However, now we would like to receive a notification via email that a guest has send us a message via Booking.com. When I look at our settings, I can see that we chose the box with 'send us an email whenever a guest sends us an email'. But we do not receive anything. Can you please look into this? 

Kind regards, 

Abdij de Westerburcht