Autoresponder email did not send for any of these entries??

We had over 70 entries for this competition. Unfortunately, the Autoresponder email did not go to anyone. It worked when I did the test. I have deleted the autoresponder email and created it again. But it still didn't send, when doing an entry in sandbox mode to check everything is working. I can not understand why it is not working????

I have just tested your form and I received the email autoresponder: 

I have also checked your email history and the emails are showing up there as sent, you may also check this on your end following this guide: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History 

Also, the emails may have ended up in the spam/junk folder, please kindly check this and mark them as not spam. 

I hope this helps.