[Fwd: sendmail fails to deliver mail with attachments in /var/spool/mqueue]

Jeff V. Merkey
2000-11-10T18:49:56Z

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The sendmail folks are claiming that the TCPIP stack in Linux is broken,
which is what they claim is causing problems on sendmail on Linux
platforms. Before anyone says, "don't use that piece of shit sendmail,
use qmail instead", perhaps we should look at this problem and refute
these statements -- I think that sendmail is causing this problem. The
version is sendmail 8.9.3

I can reproduce this bug on RH6.2, RH7.0, Caldera 2.2, 2.3, and 2.4,
Suse 6.X versions, and any of these distributions with the following
kernels.

2.2.14, 2.2.16, 2.2.17, 2.2.18, 2.4.0 (all). What happens is that
sendmail fails to forward mails with any attachments larger than 400K,
and they just sit in the /var/spool/mqueue directory for up to a week,
and eventually get delivered.

ANyone have any ideas if what the sendmail people are saying is on the
level, or is this just another sendmail bug.

Jeff

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Claus,

Here's the output from mailq -v and ps -ax. As you can see, sendmail is
seriously malfunctining. I have seen this same bug accross three
platforms with a wide variety
of linux kernels from 2.2.14 to 2.2.18 to 2.4.0-10. This is your bug,
and noone else's.

How do we get it fixed or is it possibly a configuration error.

Jeff

Claus Assmann wrote:
>
> On Fri, Nov 10, 2000, Jeff V. Merkey wrote:
> >
> >
> > Claus Assmann wrote:
> > >
> > > On Fri, Nov 10, 2000, root wrote:
> > > >
> > > > I am seeimg sendmail 8.9.3 fail to deliver emails in /var/spool/mqueue
> > > > with attachements for up to a week. Issuing the command "sendmail -v
> > > > -q" does not flush the mail queue.
> > >
> > > Is the queue item locked? What happens when you try to run it?
> >
> > How do I tell if the queue item is locked. If you have a web browser, I
>
> mailq -v
> look for a '*' next to the id.
>
> > am running
> > webmin on the box and I have setup an account so you can come in and see
> > the mail queue yourself.
> >
> > enter www.timpanogas.org:10000 as your URL, then login as
> > username "sendmail" and password "sendmailbugs". I will disable this
>
> I don't know webmin, but most of the entries say "sending". So
> check your sendmail processes to see what they are doing. There
> might be some Linux TCP/IP stack bug that causes the problem (no
> proper timeout). For that you need to use trace/truss to see where
> the processes hang and how old they are.
>
> I couldn't see any local delivery or very old entries.

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PID TTY STAT TIME COMMAND
1 ? S 0:06 init [3]
2 ? SW 0:00 [kflushd]
3 ? SW 0:01 [kupdate]
4 ? SW 0:00 [kpiod]
5 ? SW 0:00 [kswapd]
95 ? S 0:00 /sbin/modprobe -s -k nwfs
96 ? D 0:00 /sbin/modprobe -s -k nwfs
97 ? D 0:00 /sbin/modprobe -s -k nwfs
98 ? D 0:18 /sbin/modprobe -s -k nwfs
99 ? D 0:00 /sbin/modprobe -s -k nwfs
100 ? D 0:05 /sbin/modprobe -s -k nwfs
101 ? D 0:00 /sbin/modprobe -s -k nwfs
102 ? D 0:00 /sbin/modprobe -s -k nwfs
103 ? D 0:00 /sbin/modprobe -s -k nwfs
104 ? D 0:00 /sbin/modprobe -s -k nwfs
105 ? D 0:00 /sbin/modprobe -s -k nwfs
344 ? S 0:00 portmap
367 ? S 0:00 rpc.statd
390 ? S 0:00 /usr/sbin/automount /misc file /etc/auto.misc
405 ? S 0:00 /usr/sbin/apmd -p 10 -w 5 -W -s /etc/sysconfig/apm-sc
456 ? S 0:19 syslogd -m 0
465 ? S 0:00 klogd
479 ? S 0:00 identd -e -o
483 ? S 0:00 identd -e -o
484 ? S 0:00 identd -e -o
485 ? S 0:00 identd -e -o
486 ? S 0:00 identd -e -o
497 ? S 0:00 /usr/sbin/atd
511 ? S 0:00 crond
529 ? S 0:01 inetd
543 ? S 0:20 named -u named
557 ? S 0:00 lpd
616 ? S 0:00 gpm -t ps/2
630 ? S 0:00 httpd
709 ? S 0:00 xfs -droppriv -daemon -port -1
750 ? S 0:06 /usr/sbin/sshd
755 tty2 S 0:00 /sbin/mingetty tty2
756 tty3 S 0:00 /sbin/mingetty tty3
757 tty4 S 0:00 /sbin/mingetty tty4
758 tty5 S 0:00 /sbin/mingetty tty5
759 tty6 S 0:00 /sbin/mingetty tty6
2611 tty1 S 0:00 /sbin/mingetty tty1
16526 ? S 0:00 httpd
16528 ? S 0:00 httpd
18678 ? S 0:00 httpd
18679 ? S 0:00 httpd
18680 ? S 0:00 httpd
18681 ? S 0:00 httpd
18682 ? S 0:00 httpd
18683 ? S 0:00 httpd
19308 ? S 0:00 httpd
19309 ? S 0:00 httpd
19310 ? S 0:00 httpd
20757 ? S 0:00 httpd
20936 ? S 0:00 httpd
20937 ? S 0:00 httpd
20938 ? S 0:00 httpd
20939 ? S 0:00 httpd
20940 ? S 0:00 httpd
20941 ? S 0:00 httpd
22244 ? S 0:00 sendmail: accepting connections on port 25
22331 ? S 0:00 in.telnetd: manos.timpanogas.org
22332 pts/1 S 0:00 login -- jmerkey
22333 pts/1 S 0:00 -bash
22359 pts/1 S 0:00 su -
22360 pts/1 S 0:00 -bash
22638 ? S 0:00 ftpd: cvx-36.flex.com: anonymous/guest@unknown.net: R
22841 ? S 0:00 ftpd: cadmium.sge.net: anonymous/bpftp@: IDLE
22866 ? S 0:00 perl /usr/libexec/webmin/miniserv.pl /etc/webmin/mini
22875 pts/1 R 0:00 ps -ax

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