Adding validation criteria to validate the emails and making it case insensitive

Hello! I wanted to add validation criteria for the question of email and it needs to be case insensitive, Does somebody know how to do that? for example: It works for both mur@gmail.com and Mur@gmail.com. I have around 500 emails need to be in the validation criteria, so if there is an easy way it would be appreciated! Thanks

Welcome to the community, @murtiza! We have some workarounds in the community which should help you solve your issue:

And this one too …

And this one too …

We also have a support article Restricting Text Responses With Regular Expressions on regex which should help you better understand how to build a regex code by yourself.