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.
Emails from Jotform are not sent encrypted, these are regular emails like any other else. However, you can use your own email server to send secure emails to your form users. Here's how: https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form
Regarding on secure form submissions, just enable HTTPS on your form or tick the "secure form" checkbox when you get your form URL or embed codes.
If you have further questions about this, let us know here. Thank you!