On Thu, Oct 23, 2014 at 05:53:01PM +0200, Laurens Van Acker wrote:

> # pgrep -x dnsblog | wc -l
> 0

Seems unlikely, below nestat reports dnsblog processes

> The lock file is there:
> 
> # ls /var/spool/postfix/pid/
> ... unix.dnsblog ...

Which process has it locked?

> # netstat -anp --unix | grep dnsblog
> unix  2      [ ACC ]     STREAM     LISTENING     526425   10764/master 
> private/dnsblog
> unix  2      [ ]         DGRAM                    717894   17046/dnsblog
> unix  2      [ ]         DGRAM                    716334   17041/dnsblog
> unix  2      [ ]         DGRAM                    717846   17038/dnsblog
> unix  2      [ ]         DGRAM                    716310   17037/dnsblog
> unix  2      [ ]         DGRAM                    717882   17044/dnsblog
> unix  2      [ ]         DGRAM                    716322   17039/dnsblog
> unix  2      [ ]         DGRAM                    716346   17043/dnsblog
> unix  2      [ ]         DGRAM                    717858   17040/dnsblog
> unix  2      [ ]         DGRAM                    717870   17042/dnsblog
> unix  2      [ ]         DGRAM                    716360   17045/dnsblog
> unix  2      [ ]         DGRAM                    716520   17053/dnsblog

She DGRAM socket is likely the syslog socket.  I'm not seeing any
dnsblog processes listening on the actual dnsblog socket.

You have to dig deeper, but may lack the skill to do so...  I can't
spoon-feed you through this one step at a time. :-(

-- 
        Viktor.

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