[courier-users] Sendmail issue after upgrade to 0.53.2

On a FC2 system now running Courier 0.53.2, we have a formmail.pl CGI
script that has been submitting mail through a pipe to "sendmail -t" for
quite a while without issue. But as soon as I upgraded to 0.53.2 things
went "interesting." In particular, I find that if I invoke sendmail via
root it sends mail just fine. But if I invoke via non-root user, it
fails with

432 Mail filters temporarily unavailable
sendmail: Unable to submit message

In the maillog:

<date> <host> submit: Transport endpoint is not connected

The best description of this that I've found in old threads is that the
ownership of the sendmail binary was wrong. But I have indeed confirmed
that it is -r-s--x--x:

total 6936
lrwxrwxrwx 1 root root 52 Jun 6 2005 addcr ->
/usr/lib/courier/libexec/courier/modules/esmtp/addcr
-r-sr-sr-x 1 courier courier 153118 Oct 12 23:45 cancelmsg
-r-xr-xr-x 1 courier courier 25274 Oct 12 23:45 courier-config
-r-xr-xr-x 1 courier courier 1684174 Oct 12 23:45 couriermlm
-r-xr-xr-x 1 bin bin 419285 Oct 12 23:45 couriertls
-r-xr-xr-x 1 courier courier 123816 Oct 12 23:45 deliverquota
-r-xr-xr-x 1 courier courier 147192 Oct 12 23:45 dotforward
-r-xr-xr-x 1 courier courier 1183119 Oct 12 23:45 imapd
-r-xr-xr-x 1 courier courier 60083 Oct 12 23:45 lockmail
-r-xr-xr-x 1 courier courier 118954 Oct 12 23:45 mailbot
-r-xr-xr-x 1 courier courier 108052 Oct 12 23:45 maildiracl
-r-xr-xr-x 1 courier courier 196794 Oct 12 23:45 maildirkw
-r-xr-xr-x 1 courier courier 137617 Oct 12 23:45 maildirmake
-r-s--x--x 1 root courier 1092161 Oct 12 23:45 maildrop
-r-xr-sr-x 1 courier courier 135716 Oct 12 23:45 mailq
lrwxrwxrwx 1 root root 30 Oct 12 23:45 makedat ->
/usr/lib/courier/share/makedat
-r-xr-xr-x 1 courier courier 184930 Oct 12 23:45 makemime
-r-xr-xr-x 1 courier courier 129544 Oct 12 23:45 mimegpg
-r-xr-xr-x 1 courier courier 31319 Oct 12 23:45 preline
-r-xr-xr-x 1 courier courier 234544 Oct 12 23:45 reformail
-r-xr-xr-x 1 courier courier 343868 Oct 12 23:45 reformime
lrwxrwxrwx 1 root root 8 Oct 12 23:45 rmail -> sendmail
-r-s--x--x 1 root courier 144313 Oct 12 23:45 sendmail
-r-xr-xr-x 1 courier courier 322097 Oct 12 23:45 testmxlookup

I also see older references to amavisd-new and the ownersihp of the
socket used, but that turned out to be correct as well. In fact, mail is
generally being received and delivered just fine. It's just that
non-root users can't seem to use sendmail directly.

I'm certain something needs fixing, but I've run out of obvious things
to check. If there's a debug mode to enable that will reveal more detail
than this message is offering then I'll gladly trudge through the
results to do more sluething. But I feel a little stuck at this point.

Bill



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