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.
Thank you for contacting us.
You may ask your mail host to whitelist our mail IP 220.127.116.11 to see if that makes any difference.
Alternatively, please switch the Sender E-mail on your form email notifications to our recommended sender firstname.lastname@example.org. I hope it will solve the problem for you, since we use another mailing method (Amazon SES) for this sender and it should be a bit more reliable.
Please feel free to contact us if you need any further assistance on this.
I did not make any changes to my form as suggested, however, it started working again this morning. My concerns are as follows:
1. What caused this issue to begin with.
2. How can we be sure the issue will not keep occurring intermittently?
There is no specific reason and it primarily depends on the recipient's email service provider. We attempt to send all emails.
The problem with not using email@example.com as the sender email of your notification, is a lot of email service providers can filter as spam, emails which don't originate from the same domain where the form is embedded.
Unless you have option to whitelist our email server ip address, leaving the sender email of your notfication as firstname.lastname@example.org may the best way to ensure our emails dont get blocked by any mail service provider.