Email notifications have stopped working - HELP

My email notifications have been set up, we did a test submission and the notification email came through fine. We took the form live and have received several submissions so far but no email notifications are coming through. I have even tried to forward the submissions but that also doesn't work. I have checked that the email is not in the blocked list and cleared the chache. Help what is going wrong here?

I see that this is about form 60880447594870, and I see that it is using the option for attaching PDF to your emails:

About 3-4 hours ago, our primary datacenter went down, and we had to switch to the backup datacenter in order for forms to continue working. As we had switched to the backup server, it couldn't send any emails that had PDF attached to it.

This issue is resolved now, and our system can once again send emails containing attached PDF files.

I also see that your email notifications used to have the same email address both as a sender and as recipient address, which is also a combination very likely to cause your server to reject our emails. It is best to use one of our default sender addresses, such as noreply@jotform.com, which you seem to be using now.

Please test your form again, and kindly let us know if you experience any further issues in receiving your emails. Thank you.