Help with Xenix + TCP/IP echoing mail

[Richard John Botting]

We configured our SCO XENIX/386 to run with
STREAMS TCP/IP  (System V STREAMS TCP - Release 2.0,  LAI System V.3
                 jointly developed by Lachman Associates and Convergent
                 Technologies)

Mail has started to send a copy back to the sender. A
copy of all mail - local, delivered, undelivered,...!
This didn't seem a problem until I found 'root' getting copies 
of all calendar messages:
# mail -u root
3 messages:
   1 Super user    Wed 14 Mar  8:01  18/558 "Mail echoes @$#%@$ calendar"
   2 Dr. Botting   Thu 15 Mar 18:33  14/384 "I'm testing mail. ignore."
   3 Super user    Fri 16 Mar  1:20  11/298 "calendar"
3
>From cron Fri Mar 16 01:20:09 1990
Received: by silicon.csusb.edu.laichi.uucp;
          id AA11014; 5.52/LAI-XENIX-1.0; Fri, 16 Mar 90 01:20:09 PST
From: Super user <root>
To: dick
Subject: calendar
Date: Fri, 16 Mar 90 1:20:07 PST

...
---------
I have tried two different 'sendmail.cf' lines:
Mlocal, P=/usr/lib/mail/mail.local, F=UnFDxPlm, S=10, R=20,
	A=mail.local $u
and
Mlocal, P=/usr/lib/mail/mail.local, F=UnFDxPlm, S=10, R=20,
	A=mail.local -r $g $u

Both S10 and R10 are empty.

RTFMing has not lead to any clues.
We have tried all documented 'mail' set commands.

If it is a 'mail' option
or 'sendmail.cf' entry or a 'mail.local' option I haven't
found the documentation for it.


Any clues, information and advice would be deeply appreciated
by
Dick Botting, 
Department of computer science,
California State University, San Bernardino, CA 92407

rbottin at atl.calstate.edu
>INTERNET:rbottin at atl.calstate.edu (Compuserve)
paaaaar at calstate.bitnet 
voice:714-880-5327