The Email field in Cal.com’s booking questions supports domain-level restrictions, allowing you to control who can (or can’t) book time with you based on their email address.
Go to your Advanced settings of your Event type setup. Under **Booking questions, **find the Email field. Click on Editnext to the booking question, and you’ll see options to:
Require emails that contain (…)
Exclude emails that contain (…)
Simply use the fields to specify or exclude email domains for your specific use case.