Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Wed, 30 Dec 2009 16:43:22 +0000 (GMT)

This is the mail system at host a.b.c.

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 10.16.32.166[10.16.32.166] said: 500 Mail
    appears to be unsolicited -- report errors by telephoning the person you
    are emailing so they may add you to our whitelist or [email-masked]
    (in reply to end of DATA command)

Subject: stuff
From: Customer Services <[email-masked]>
To: [email-masked]
Date: Wed, 30 Dec 2009 16:46:16 +0000

html here