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.
You can do that by creating an Autoresponder email. Here's a guide:
1. Create a E-mail Field and then click the Emails button in the Form Builder.
2. Select the Autoresponder and then click the Edit button.
3. In the next screen, you can fully customize the Autoresponder email. You can edit the message, the recipients, sender name, sender email and many more.
Please check this complete user guide: Creating-a-Form-Autoresponder
Hope that helps. Let us know if you need any further assistance. Thank you.