- CharlieAnswered on March 01, 2016 at 11:11 AM
If you wish to limit your users to vote per unique email. That is possible by enabling your form limits.
Here's a guide about it:
To limit submission per unique answer in your form fields (like your email field), then you can follow this guide: http://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question
To limit your submission per browser OR by unique IP, you can follow this one: http://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form
I hope that helps.