Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Mon, 27 Jul 2009 15:25:06 +0100 (BST)

This is the Postfix program at host server4.example.co.uk.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

			The Postfix program

<[email-masked]>: Name service error for name=yyahoo.com type=MX:
    Malformed name server reply

Subject: BLAH
From: Customer Services <[email-masked]>
To: [email-masked]
Date: Mon, 27 Jul 2009 15:25:04 +0100

Original message body