I've set up my account which appears to be working correctly. I have tried to set up an alias as i want people to be able to send mail to hello@mydomain too but mails sent to this address fail to send with the following error..

Reporting-MTA: dns; BLU004-OMC1S29.hotmail.com
Received-From-MTA: dns;BLU437-SMTP30
Arrival-Date: Sat, 28 Feb 2015 16:06:25 -0800

Final-Recipient: rfc822; hello@birdandkey.co.uk
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 This domain is not hosted here

any ideas? thanks