I have a form field question(with 3 form fields) where I want respondents to enter email ID. I have a certain 'exclusion list'- A list of email IDs(30+) I don't want in the form fields.My main question is that I want to add a validation where the form field wont go forward if Emails from the 'exclusion list' are entered.Please help.Also, adding Validation on each and every email ID is an option, but a lengthy one. So please suggest something else.Attaching Screenshot for better understanding.

You have to add a regex which will store the values from 30 emails as you mentioned and then throw a custom validation if the regex matches.

How to add a validation option on Exclusion list?

How to add a validation option on Exclusion list? | Experience Community