Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Mon, 2 Jan 2012 13:37:01 +0200 (SAST)

This is the Postfix program at host thing.example3.com.

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]>: host 196.33.120.18[196.33.120.18] said: 534
    SIZE=Message too big. (in reply to MAIL FROM command)

Subject: foo
From: Fred Bloggs <[email-masked]>
To: John Smith <[email-masked]>
Date: Mon, 2 Jan 2012 11:35:12 +0000

HTML