What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
I am not sure if I have understood your question correctly.
Do you want to change the "Sender Email" to the email address of the person who submitted your form?
Unfortunately it is not possible to change the "Sender Email" address to an email field of your form. You can set the "Reply-To" field to show the email address of the person who submitted the form. When you receive submission emails, you will see that the "From" field is whatever you have selected but if you reply to that email it till be sent to the person who submitted the form. Please check the screenshot below:
There a another alternative to achieve your requirement. You may also like to check the following guide : https://www.jotform.com/help/258-How-to-receive-your-email-notifications-as-if-your-form-submitter-sent-them
Hope this helps.
Do get back to us if you meant to ask something else.