[BlueOnyx:17421] Fwd: Returned mail: see transcript for details

[New Millennium Internet Services Ltd]

Hi all

I have a mail problem

I have two servers and i often get these messages when one 
account/domain writes to another on one of my servers - if i write to 
either of these addresses below from Outlook then no problems??????

Nic
----------------------------------------------

-------- Forwarded Message --------
Subject: 	Returned mail: see transcript for details
Date: 	Tue, 14 Apr 2015 09:52:57 +0100
From: 	Mail Delivery Subsystem <MAILER-DAEMON at server.blue-quartz.co.uk>
To: 	info at nm.tm



The original message was received at Tue, 14 Apr 2015 09:52:48 +0100
from 88-144-1-63.host.pobb.as13285.net [88.144.1.63]

    ----- The following addresses had permanent fatal errors -----
<belinda at heavenlycity.co.uk>
     (reason: 550 5.1.1 User unknown)

    ----- Transcript of session follows -----
... while talking to mail.heavenlycity.co.uk.:
>>> MAIL From:<info at nm.tm>
<<< 550 5.1.1 User unknown
554 5.0.0 Service unavailable



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