I've enabled the -v option on master.cf; but still my /var/log/maillog is almost empty. I'm having a problem i have my hard times debugging without any log.


is your syslogd setup to log stuff to maillog? like following:

[alexus@wcmisdlin02 ~]$ grep ^mail /etc/rsyslog.conf 
mail.*                                                  -/var/log/maillog
[alexus@wcmisdlin02 ~]$ 

also make sure it's running

[alexus@wcmisdlin02 ~]$ sudo service rsyslog status
rsyslogd (pid  1356) is running...
[alexus@wcmisdlin02 ~]$ 
  • 1
    In my CentOs mail log is in /usr/local/psa/var/log/maillog – Florencio Cano Jan 27 '15 at 9:25
  • ^ Florencio is right. It was there for me, too. – Allen Gingrich Jun 1 '15 at 19:42

I had the same log problem on CentOS-7 with postfix but also with any logger command like: 'logger System testing my log'

Checking deeper, I found out that Rsyslogd was not listening anymore on /dev/log socket !!!! This can be checked with 'lsof /dev/log'

I fixed the problem, by forcing /dev/log in /etc/rsyslogd.conf. -- after $ModLoad imuxsock -- add input(type="imuxsock" HostName="localhost" Socket="/dev/log")

This will force usage of /dev/log, which after my last update was no more the default. This is probably a bug. I have the problem with rsyslog-7.4.7-7.el7_0.x86_64 or


You can solve this issue with delete maillog file and restart rsyslog service:

cd /var/log/
rm -f maillog
service rsyslog restart 
service postfix restart

source: http://forum.centos-webpanel.com/postfix/varlogmaillog-no-data-update-when-mail-incoming-and-outgoing/

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