Postfix Error 550

--7041D20231.1151405544/blackcase.colocation
Content-Description: Delivery report
Content-Type: message/delivery-status

Reporting-MTA: dns; blackcase.colocation
X-Postfix-Queue-ID: 7041D20231
X-Postfix-Sender: rfc822; nobody@blackcase.colocation
Arrival-Date: Tue, 27 Jun 2006 11:52:23 +0100 (BST)

Final-Recipient: rfc822; recipient@hotmail.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host mx0.123-reg.co.uk[195.224.48.126] said:
  550-Verification failed for <nobody@blackcase.colocation> 550-Unrouteable
  address 550 Sender verify failed (in reply to RCPT TO command)

Final-Recipient: rfc822; recipient@hotmail.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host mx0.123-reg.co.uk[195.224.48.126] said: 550
  Sender verify failed (in reply to RCPT TO command)

--7041D20231.1151405544/blackcase.colocation
Content-Description: Undelivered Message
Content-Type: message/rfc822

Received: by blackcase.colocation (Postfix, from userid 65534)
    id 7041D20231; Tue, 27 Jun 2006 11:52:23 +0100 (BST)
To: recipient@hotmail.com
Subject: Web Contact Form
From: from@email-address.com (No Body)
X-Priority: 3
Content-Type: text/plain; charset=utf-8
X-Mailer: PHPFormMail Classic v1.07.2 (http://www.boaddrink.com)
Message-Id: <20060627105223.7041D20231@blackcase.colocation>
Date: Tue, 27 Jun 2006 11:52:23 +0100 (BST)


Below is the result of your feedback form. It was submitted by
No Body (from@email-address.com) on June 27th, 2006 at 11:52AM (BST).

realname: --------------------------------------------------
Phone: --------------------------------------------------
Address: --------------------------------------------------
select: --------------------------------------------------
Brochure: --------------------------------------------------
email: --------------------------------------------------
Enquiry: --------------------------------------------------