Completed forms do not come

Yesterday all forms worked fine, but today - I do not get an email once form is completed. I have checked settings, spam folder - email do not come. So I don't know if someone submitted a form. Forms show up as completed on Jotform website, but no emails come to my mailbox. Do you know what is the problem? I have used correct email. 

The issue causing the delayed emails has been resolved.  The emails that have not yet been sent should send within the next 10-15 minutes.  Any new emails should send immediately.