Delivery Status Notification (Failure)

Address not found Your message wasn't delivered to glololo999papi@hotmail.com because the address couldn't be found, or is unable to receive mail.

The response from the remote server was: 550 5.5.0 Requested action not taken: mailbox unavailable. [DM3NAM03FT005.eop-NAM03.prod.protection.outlook.com]