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.
Do you mean you're not receiving email notification from your form? Your post title says that your notification fails, but your description seems like you have it working.
If you're not receiving email notification, I would suggest following our recommendations from this guide: How To Setup Email Alerts To Prevent NOT Receiving Email Alerts & Bouncing Issues.
If this isn't what you mean, then please kindly add further details.