Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Wed, 27 Jul 2011 12:26:25 +0200 (CEST)

This is the mail system at host mx2.mail.sample.net.

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 127.0.0.1[127.0.0.1] said: 550 Rejected by ESETS_SMTP
    (spam) (in reply to end of DATA command)

Subject: foo
From: Fred Bloggs <[email-masked]>
To: john smith <[email-masked]>
Date: Wed, 27 Jul 2011 11:26:05 +0100

HTML