You can go through specific settings in Booking.com to prevent removing the links sent to the guest by the channel. This setting allows you to specify which email addresses you use to communicate with your guests, and which can be shared with your guests via BDC messaging platform. Any messages sent from unregistered email addresses will not reach your guests.
Here’s the link that guides you how to specify email addresses that can reach your guests: https://partner.booking.com/en-us/help/legal-security/security/all-about-our-messaging-security-settings
Note that you can find your domain in Zeevou by going to Marketing -> General Settings -> Site Management tab -> Domain Setting card.