If you want to send an email through Bookinglayer to everyone belonging to the same booking, follow the steps below:
1. Open the booking you want to send an email to.
2. Click on send email.
3. Notice that all your guests (with different and valid email) will be automatically CC'ed on the email. If they are not CC'ed automatically, you just need to edit your guests' details and update a valid and unique email address for them.