Always require SMS Delivery notification
 

Always require SMS Delivery notification:

If you always want an SMS Delivery notification (see note below!), and are tired of ticking the 'Request message delivery notification' checkbox, set:
HKLM\Software\Microsoft\Inbox\Settings\SMSDelivery Notify = 1 (DWORD decimal)
To disable again:
HKLM\Software\Microsoft\Inbox\Settings\SMSDelivery Notify = 0 (DWORD decimal)

Note 1: Delivery notifications will depend on your and the recipient's operator network capabilities! Note 2: You can still override this with the regular checkbox.