Delivery Status Notification (Failure)

Address not found Your message wasn't delivered to m.2010_q6r@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. [BN3NAM01FT008.eop-nam01.prod.protection.outlook.com]