🚀 go-pugleaf

I have our central machine (tango), which functions as our nameserver for our
subdomain, set up so that all mail to root, Postmaster, etc., gets sent to my
root account on my machine (foxtrot).  Every week I collect at least 4 of this
following kind of mail from the Mailer-Daemon on the central machine:

|From Mailer-Daemon@tango.ccmrc.ucsb.edu Mon Nov  2 09:46:06 1992
|Return-Path: <Mailer-Daemon@tango.ccmrc.ucsb.edu>
|Received: from tango.ccmrc.ucsb.edu by foxtrot.ccmrc.ucsb.edu (NeXT-1.0 (From
|Sendmail 5.52)/NeXT-2.0x) id AA02211; Mon, 2 Nov 92 09:46:04 PST
|Received: by tango.ccmrc.ucsb.edu (4.1/SMI-4.1)
|	id AB01012; Mon, 2 Nov 92 09:45:59 PST
|Date: Mon, 2 Nov 92 09:45:59 PST
|From: Mailer-Daemon@tango.ccmrc.ucsb.edu (Mail Delivery Subsystem)
|Subject: Returned mail: Unable to deliver mail
|Message-Id: <9211021745.AB01012@tango.ccmrc.ucsb.edu>
|To: Postmaster@tango.ccmrc.ucsb.edu
|Status: RO
|
|----- Transcript of session follows -----
|<<< EXPN chahal
|550 chahal... User unknown
|<<< QUIT
|
|----- No message was collected -----
|

The only difference between the different ones I get is the the user name
changes.  There is never any information about where this mail came from.
None of the names following the EXPN line are anyone who has ever been at this
site.  I can only assume that this mail is coming in from the outside.

Can anyone give me some information as to why I am collecting so much mail of
this sort?  Is my machine failing to forward this mail on to some unknown
site?

Thanks in advance!

-- 
Douglas Scott                              (805)893-8352
Center for Computer Music Research and Composition
University of California, Santa Barbara
Internet: (NeXTMail ok)   <doug@foxtrot.ccmrc.ucsb.edu>