Hello,

I have been trying to send an email to ****@liv.co.uk domain but I get the following NDR:

Reporting-MTA: dns;dub0-omc4-s30.dub0.hotmail.com
Received-From-MTA: dns;DUB404-EAS275
Arrival-Date: Wed, 9 Oct 2013 00:27:04 -0700
Final-Recipient: rfc822;*****@liv.co.uk
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;554 The mail could not be delivered to the recipient because the domain is not reachable. 
Please check the domain and try again (1479978268:301:-2147467259)

I am able to send emails to this domain from gmail, aol and others. I have checked DNS to ensure that mx records are correct.

Can anyone help me?