How can I limit submissions based on the email address

I would like to limit my form to one vote per email using the email validator. I read that it limits it to 10, but I would like to limit it to one.

I've tried conditional logic (creating additional email field that must match the validator), and I can get it to hide the submit button, but I don't see a way to add an error message so people know what to fix.

It is possible to set form limits based on a unique question.  Here is our guide on how to do so:

https://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question

Set this to your email field and it will only allow one submission per address.

Unfortunately, I can't set the unique question to the validator widget.

My initial thought was to make an Email field that I COULD set as a unique question, and then use conditional logic to make sure it matched the validator.

But no such luck...

If the aim is to limit your users to just 1 vote per email address, then following my colleague's suggestion is the way to go. You won't be using the EMAIL VALIDATOR field as the UNIQUE QUESTION though since that's not doable. You'd have to use the regular EMAIL FIELD.

You can copy/pass the value from the EMAIL VALIDATOR WIDGET to the regular EMAIL FIELD using a condition.

As demonstrated on this form I made: https://www.jotform.com/73555667543972

I also recommend you set the regular EMAIL FIELD to READ-ONLY so your users won't be able to change it after validating their email.

Afterwards, go with David's suggestion and set the regular EMAIL FIELD as your form's UNIQUE QUESTION.

Thank you very very much!!! I appreciate it more than you know!!!!!!

I've changed my form from using Email Validator to Xverify. Now, the copy/fill condition doesn't seem to be working. Is there a reason for this?

Disregard! I believe I got it working.

I am glad to hear that you have figure it out. Please let us know if you have any other question.