Recently we have setup the Mews app with Mail templates sending to guest automatically. It was all good for Direct booking through booking engine. However, for those OTA bookings (such as Booking.com), the guest never receive any email setup on Mews (including confirmation email and online checkin etc). We can confirm the integration is fine (Bookings and rate are synchronized). We also enabled the option of “Send confirmation email to channel reservations”.
Appreciate your advice what is missing for the OTA bookings.