Postfix: Mysterious undelivered message to root

[Clint Olsen]

Ever since I've enabled the Postfix port on FreeBSD 5.X, I've had this
annoying message that keeps being sent.  I don't know what process that's
running keeps generating it.  It's possible I have Postfix somehow
misconfigured since I've been carrying around the same configuration file
for a number of Postfix releases.

Thanks,

-Clint

Return-Path: <>
X-Original-To: root at 0lsen.net
Delivered-To: root at 0lsen.net
Received: by 0lsen.net (Postfix)
        id 92B1817AD8; Tue,  4 Jan 2005 03:01:00 -0800 (PST)
Date: Tue,  4 Jan 2005 03:01:00 -0800 (PST)
From: MAILER-DAEMON at 0lsen.net (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender
To: root at 0lsen.net
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
        boundary="7E9C417AD5.1104836460/0lsen.net"
Message-Id: <20050104110100.92B1817AD8 at 0lsen.net>
 
[-- Attachment #1: Notification --]
[-- Type: text/plain, Encoding: 7bit, Size: 0.4K --]
Content-Description: Notification
Content-Type: text/plain
 
This is the Postfix program at host 0lsen.net.
 
I'm sorry to have to inform you that your message could not be
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
 
<unknown>: No recipients specified
 
[-- Attachment #2: Delivery report --]
[-- Type: message/delivery-status, Encoding: 7bit, Size: 0.3K --]
Content-Description: Delivery report
Content-Type: message/delivery-status
 
Reporting-MTA: dns; 0lsen.net
X-Postfix-Queue-ID: 7E9C417AD5
X-Postfix-Sender: rfc822; root at 0lsen.net
Arrival-Date: Tue,  4 Jan 2005 03:01:00 -0800 (PST)

Final-Recipient: rfc822; unknown
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; No recipients specified

[-- Attachment #3: Undelivered Message --]
[-- Type: message/rfc822, Encoding: 7bit, Size: 0.3K --]
Content-Description: Undelivered Message
Content-Type: message/rfc822

Received: by 0lsen.net (Postfix, from userid 0)
        id 7E9C417AD5; Tue,  4 Jan 2005 03:01:00 -0800 (PST)
Message-Id: <20050104110100.7E9C417AD5 at 0lsen.net>
Date: Tue,  4 Jan 2005 03:01:00 -0800 (PST)
From: root at 0lsen.net (Charlie Root)
To: undisclosed-recipients:;