Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Tue, 17 Nov 2009 21:00:03 +0000 (GMT)

This is the mail system 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 mail system

<[email-masked]>: host ibmr.example2.com[213.123.26.151] said: 550
    <[email-masked]>... Relaying denied (in reply to RCPT TO command)

Subject: BLEH
From: Customer Services <[email-masked]>
To: [email-masked]
Date: Tue, 17 Nov 2009 21:00:01 +0000

Hello