JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If I understand correctly, you want the email address of your users that are submitting the form to be used as the Sender Email address in your email notifications. Yes, this is possible by using Mandrill in conjunction with your JotForm form for setting it up.
Please take a look at the following guide:
Please try it out and let us know if you need any assistance or if you hit any snags along the way, we will be happy to help.