Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Thu, 3 Mar 2011 10:25:56 +0000 (GMT)

This is the mail system at host admin1.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 sli.example.com[212.98.181.17] said: 550
    Error: SPAM-ID: h20030701-214001 Your email had spam-like header contents.
    Please contact your email service provider. (in reply to end of DATA
    command)