For email notifications of kintone, you cannot specify "To" or "CC" email addresses.
Recipients of email notifications are specified as "Bcc."

Depending on the mail server you use, emails whose "To" field is empty may be filtered out, and as a result, you may not receive the emails.
In such a case, consider taking one of the following actions:

• Change the setting of the mail server in such a way as to receive email notifications from kintone.
  Ask your provider for information on the mail server settings.
  
  

• Check notifications on the Portal screen of kintone instead of using email notifications.
  Refer to Checking notifications.
  
  

• Use the Push Notifications feature of the mobile app to check "To me" notifications.
  Push notifications are only available for "To me" notifications. To check other notifications, you need to log in to the mobile app.
  If you do not receive push notifications, refer to the following page.
  I am not receiving push notifications from the mobile app