postfix smtp error 4.3.5. - kolab.conf not readable

Jan Kowalsky tuxus at
Tue Nov 19 17:20:43 CET 2013

Hi all,

first thanks to all who help debugging here on the list or in irc. It's really 
great: for every question somebody has an hint. A big compliment espacially to 
the developers.

Today I got the problem that postfix didn't send. It failed with 4.3.5. and in 
the mail.log only:

Nov 19 15:01:03 mail postfix/submission/smtpd[3156]: BFBE33C1E6: reject: DATA 
from localhost[]: 451 4.3.5 Server configuration problem; from=<....> 
to=<...> proto=ESMTP helo=<>

Enabling debugging in /etc/postfix/ [1] gave me:

mail postfix/submission/smtpd[4866]: input attribute name: 2013-11-19 
16:55:36,776 pykolab.conf ERROR Configuration file /etc/kolab/kolab.conf not 

the kolab.conf has had rights 640

Just for trying I set it to 644 and: sending succeeded!!!

This is of course a bad idea to make this file world readable. Any idea?

Maybe I should mention that my installation is on two servers. One for ldap 
and kolab-webadmin, one for mta, imap, roundcube.


[1] thanks to jmeeuwen for finding out where to enable debugging option: (for 
anybody looking at this): : eg: 
recipient_policy    unix        -       n       n       -       -       spawn
    user=kolab-n argv=/usr/lib/postfix/kolab_smtp_access_policy --verify-
recipient -d 8

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