Delivery Status Notification (Failure)

** Address not found ** Your message wasn't delivered to [redacted] because the address couldn't be found, or is unable to receive mail. Learn more here: https://support.google.com/mail/?p=NoSuchUser The response was: The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. For more information, go to https://support.google.com/mail/?p=NoSuchUser