** Address not found ** Your message wasn't delivered to support@example.com because the domain example.com couldn't be found. Check for typos or unnecessary spaces and try again. Learn more here: https://www.rfc-editor.org/info/rfc7505 (Warning: This link will take you to a third-party site) The response was: DNS Error: DNS type 'mx' lookup of example.com responded with code NOERROR The domain example.com doesn't receive email according to the administrator: returned Null MX. For