[Exim] Mail failure - no recipient addresses

Thanks for the help earlier. I have another odd situation that I asked
about awhile ago but I wasn't able to figure it out. I think the behavior
is a little different now though. A program runs on machine1.msu.edu and
tries to send a notification to user123@??? and it is successful but
then it also sends one back to the sender saying it was unsuccessful.
This behavior occurs without any changes to the stock config file.

Thanks,

Tony


*****************
Log entries
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2003-04-02 09:42:04 190jRE-0003oP-Ak <= illadm@??? U=illadm
P=local S=1603
2003-04-02 09:42:04 190jRE-0003oU-F7 <= <> R=190jRE-0003oS-Dm U=exim
P=local S=2139
2003-04-02 09:42:04 190jRE-0003oP-Ak => user123@??? R=dnslookup
T=remote_smtp H=mail.msu.edu [xx.x.xx.xxx]
2003-04-02 09:42:04 190jRE-0003oP-Ak Completed
2003-04-02 09:42:04 190jRE-0003oU-F7 => illadm <illadm@???>
R=localuser T=local_delivery
2003-04-02 09:42:04 190jRE-0003oU-F7 Completed


***************************************************************************
The message sent to illadm@??? by exim
***************************************************************************
>From MAILER-DAEMON Wed Apr 02 09:42:04 2003

Return-path: <>
Envelope-to: illadm@???
Delivery-date: Wed, 02 Apr 2003 09:42:04 -0500
Received: from exim by machine1.msu.edu with local (Exim 4.14)
        id 190jRE-0003oU-F7
        for illadm@???; Wed, 02 Apr 2003 09:42:04 -0500
From: Mail Delivery System <Mailer-Daemon@???>
To: illadm@???
Subject: Mail failure - no recipient addresses
Message-Id: <E190jRE-0003oU-F7@???>
Date: Wed, 02 Apr 2003 09:42:04 -0500

A message that you sent contained no recipient addresses, and therefore no
delivery could be attempted.

------ This is a copy of your message, including all the headers. ------

Received: from illadm by machine1.msu.edu with local (Exim 4.14)
        id 190jRE-0003oS-Dm; Wed, 02 Apr 2003 09:42:04 -0500
To: user123@???
Subject: ILL request from MSU
Reply-To: ill@???
Message-Id: <E190jRE-0003oS-Dm@???>
From: ill email <illadm@???>
Date: Wed, 02 Apr 2003 09:42:04 -0500

**content omitted**