How long of a delay is there before a submission shows in my inbox on a form?

This morning I've received a call from a customer that submitted a form and payment but I don't have his information in my inbox yet. 

Thank you. 

Hello,

Usually, it is instant or not more than five minutes. Also, We are having email issues recently. JotForm emails are falling into spam folders of some of the email providers. Could you please check your email spam box? If JotForm emails are there, could you please select all of them and mark them as not spam.

You can also check your email history. Here's the guide: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History

Hope that helps. Thank you.