What is different about entry #2? It's possible that your web server's email program does not want to deliver email which appears to be coming from that email address, if that's how you have configured your notifications (to come FROM the email of the person submitting the form.)
Please see our notification troubleshooting steps here:
Gravity Forms immediately hands all mail off to the WordPress function wp_mail(). After that, it is up to your web server's mail program to deliver the mail.
You mentioned all 3 going through to PayPal successfully. If that were not true, and you had checked the option "Send admin notification only when payment is received." then the notification would not be send until after payment was received. It sounds like your payment status was updated, so I do not think this is related. I just wanted to point it out in case anyone else has a similar problem in the future.
Posted 6 years ago on Tuesday March 26, 2013 | Permalink