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.
Here are the list of JotForm mail server domains:
You just need to whitelist the domains on your mail server to ensure mails would not be rejected. You can also check this link for the complete list of IP and mail servers to whitelist: Whitelisting JotMails IP Addresses.
Do let us know if you need further assistance.