Not receiving verification code

I am not receiving the verification code email to set up my email address to receive email notifications when a form is submitted, how can i fix this?

As far as I know you do not receive a verification code when you add a recipient email address, you could test the email notification by submitting your form and find if it works. 

But a verification code is sent when you add a custom sender email, may be that the address you're trying to use is currently in our bounce list so I would suggest you to check that by following this guide: How-to-Remove-Your-Email-Address-from-Bounce-List

If the problem persists, please provide us the email address you're trying to use and also let us know where are you adding it in the email wizard. 

Looking forward to your response.