From: MAILER-DAEMON@caiwireless.net
To: sender@example.com
Subject: Mail not delivered
Date: Mon, 1 Jan 2001 12:00:00 -0500
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="BOUNDARY"

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Content-Type: text/plain

Mail delivery failed.

The following recipients did not receive this message:

<userx@example.com>

--BOUNDARY
Content-Type: message/delivery-status

Reporting-MTA: dns; caiwireless.net

--BOUNDARY--
