Public bug reported:
I use postfix (almost in its default configuration) + nscd to find local users
(local_recipient_maps = proxy:unix:passwd.byname $alias_maps)
"sometimes" (really really randomly), nscd does not find a user which is
correctly in /etc/{passwd,shadow} causing postfix to return "unknown
user"
Apr 4 07:03:20 fourier postfix/smtpd[15040]: NOQUEUE: reject: RCPT from
aserver.ujf-grenoble.fr[xxx.xxx.xxx.xxx]: 450 4.1.1 <[EMAIL PROTECTED]>:
Recipient address rej
ected: User unknown in local recipient table; from=<[EMAIL PROTECTED]>
to=<[EMAIL PROTECTED]> proto=ESMTP helo=<aserver.ujf-grenoble.fr>
and :
grep myuser /etc/{passwd,shadow} :
/etc/passwd:myuserl:x:10106:20005:first last :/home/myuser:/bin/bash
/etc/shadow:myuserl:x:13577:0:99999:7:::
it's reallly random and can happen to any account,
I have been tracking that down for a few weeks now (using
unknown_local_recipient_reject_code = 450 in postfix to not actually lose mails)
my nscd.conf is the default provided one
my nsswitch.conf as well
for the last few days, I stopped nscd (/etc/init.d/nscd stop) and had no single
failure during this test
yesterday evening I started nscd back, this morning I got a failure
I use all latest packages of feisty
[EMAIL PROTECTED]:/etc/postfix# uname -a
Linux fourier 2.6.20-13-server #2 SMP Sun Mar 25 00:26:22 UTC 2007 i686
GNU/Linux
I tried activating debug-log but the log itself is pretty useless
because it does not log any timestamp ! how are we supposed to get a
usefull trackback without timestamps in the log ?
Cheers,
Mik
** Affects: glibc (Ubuntu)
Importance: Undecided
Status: Unconfirmed
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nscd sometimes fails to find a user (causing lost mail)
https://bugs.launchpad.net/bugs/102761
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