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.
You can use the HTML email option to do this.
You would need to publish an HTML page to use that option and paste its URL there so it will be used as the email template and here: http://www.htmlgoodies.com/primers/html/article.php/3478181 you can see how to add an image to an HTML page.
Hope this helps.
Let us know if you have further questions.