Emails: not being sent out

I have recipients set up to receive my forms when they are completed.  I can go in and see that the forms are completed but there are no emails being sent out.  It worked great until the last month.  Please help!  Thank you.

Can you tell me which forms are not sending the emails out?

Where-to-Find-My-Form-URL

Note that you can check your email history to determine if the emails are being sent.

How-to-View-All-Your-Form-Email-History

If they are being sent. That means they are being rejected by the recipients email provider.

In this case you can Setup-SMTP-for-a-Form. This will send your mail via an external server (eg. Gmail, Yahoo, Outlook) instead of Jotform.