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.
Sorry for this inconvenience.
I suggest you to setup your own e-mail as Sender e-mail on your notification by using SMTP to solve this issue.
This guide helps you to setup : https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form
If you still have a problem, feel free contact us.