Sendmail Dumps Core - What's Wrong?

[John Kalucki]

I'm having trouble with sendmail on my Sun IPC, SunOS 4.1, Sun's sendmail
5.64 and the version that comes off of the distribution.  (I've tried
both) My configuration file appears to be fine- I've made few changes from
the example and correctly addressed mail works well. If one of the mailers
fails (uux or /bin/mail) sendmail dumps core and leaves queue files in
/usr/spool/queue and mail is not bounced to the sender. The mailers fail,
as a normal course of business, such as sending mail to a non-existant
local user, or to a non existant directly connected uucp machine, etc. In
any case, sendmail shouldn't dump core and should bounce the mail to the
sender.

I do not run yp, dns, or such. The machine is the main mail machine for my
site- thus not having mis-addressed mail bounce is very disconcerting.

Look:

gordius:/usr/spool/mqueue# ls
gordius:/usr/spool/mqueue# la
./      ../
gordius:/usr/spool/mqueue# date | sendmail foo
foo... User unknown
gordius:/usr/spool/mqueue# ls
core            dfAA01116       lfAA01116       qfAA01116       xfAA01116
gordius:/usr/spool/mqueue# more [d-x]*
::::::::::::::
dfAA01116
::::::::::::::
Tue Apr 30 10:20:57 PDT 1991
::::::::::::::
lfAA01116
::::::::::::::
::::::::::::::
qfAA01116
::::::::::::::
P1079
T673032058
DdfAA01116
MUser unknown
Sjohnk
Rfoo
H?P?return-path: <johnk>
Hreceived: by gordius.gordian.com (4.1/SMI-4.1)
        id AA01116; Tue, 30 Apr 91 10:20:58 PDT
H?D?date: Tue, 30 Apr 91 10:20:58 PDT
H?F?from: johnk (John Kalucki)
H?x?full-name: John Kalucki
gordius.gordian.com>
Happarently-to: foo
::::::::::::::
xfAA01116
::::::::::::::
550 foo... User unknown
gordius:/usr/spool/mqueue# ll -d / /usr/spool /var /var/spool /var/spool/mqueuedrwxr-xr-x 18 root         1024 Apr 30 02:43 //
lrwxrwxrwx  1 root           12 Jul  6  1990 /usr/spool -> ../var/spool
drwxr-sr-x 10 bin           512 Oct 15  1990 /var/
drwxrwsrwx 15 uucp          512 Apr 29 19:13 /var/spool/
drwxrwsrwx  2 root          512 Apr 30 10:20 /var/spool/mqueue/
gordius:/usr/spool/mqueue# diff /etc/sendmail.cf /usr/lib/sendmail.main.cf
23c23
< #Dj$m
---
> Dj$m
25c25
< Dj$w.$m
---
> #Dj$w.$m
34,35c34,35
< DRuunet
< CRuunet
---
> DR ddn-gateway
> CR ddn-gateway
gordius:/usr/spool/mqueue# ll /usr/lib/sendmail /etc/sendmail.cf
-rw-r--r--  1 root        10660 Apr 15 15:58 /etc/sendmail.cf
-r-sr-xr-x  1 root       155648 Apr 24 09:13 /usr/lib/sendmail*
gordius:/usr/spool/mqueue#

Any suggestions? Sendmail has no problem writing into /var/spool/mqueue or
using /bin/mail or uux normally. Why is it failing on a bad exit status
from /bin/mail or uux?

	-John Kalucki
	johnk at gordian.com