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.
Usually custom emails have SMTP service that you can use. You can contact your IT team or your email service provider about this.
If you have a Gmail account, they allow you to send emails using their SMTP server. Here's a blog article about it: https://www.siteground.com/kb/google_free_smtp_server/
There are other Email services that provides SMTP service, also usually the free plan has its limits.
Let us know if that helps.