If you have feedback from guests that do not receive emails from MyStay or missing links in emails, please follow this Article 2where you can find a procedure to insert the email domain noreply @ gomystay.com and links to online check-in do bookie Extranet so that bookie did not refer to spam. It is necessary to insert all of the following links:
If you don't know what to do, then your account manager from bookie He should be able to help you.
To fill guest phone numbers from a Booking.com export, see also How to use Booking.com phone number import.