Hello.
Thanks for posting your question regarding the inability to receive notifications from your Ninja Form submissions. I’m sorry to see you are experiencing issues with this. I recommend reviewing the page that you have the contact form displayed on. In the Page editor, if you click on the “text” editor tab, then you can review the page for the Ninja Forms code (looks similar to: ‘[ninja_forms id=1]‘). Once you have found the correct ID for the form on that page, you can navigate back to the Ninja Forms to review the email settings for that specific form, since each form has it’s own email settings.
If your email settings are correct and you have accurately checked that specific form, then I recommend you work with your web host to review the server’s Exim/email logs. There may be tweaks or setup needed to be completed within their interface in order for your email to work on your domain/website cohesively. I hope this helps!
Sincerely,
Carlos D