1

To clear the mail log I deleted /var/log/mail.log and /var/log/mail.err.

Now it seems like I've broken something as the files are not recreated as I interact with mail:

kidmose@radagast:~$ echo "Test text" | mail -s "From radagast" kidmose@gmail.com
kidmose@radagast:~$ cat /var/log/mail.log
cat: /var/log/mail.log: No such file or directory

Any ideas as how to make logging work again?

(Ideally without reinstall or reboot)

My setup:

kidmose@radagast:~$ uname -a
Linux radagast 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
kidmose@radagast:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:    14.04
Codename:   trusty
7
  1. Remove the files belonging to root (If there), as suggested by @Dan.
  2. Restart MTA(sendmail in my case) and syslog, as suggested by @drookie

    sudo service sendmail restart 
    sudo service rsyslog restart
    

Bonus info: The files will then be created as syslog:adm

5

touch /var/log/mail.log /var/log/mail.err, then restart whatever is writing to them, like your MTA or syslog.

  • Restarted sendmail and rsyslog(sudo service sendmail restart and sudo service rsyslog restart) to no avail. – kidmose Feb 5 '15 at 10:59
  • 4
    If you did not forcefully created them with the touch commands, restarting syslog should do the trick (depending on the configuration, syslog may not create them as root) – Dan Feb 5 '15 at 19:02
  • @Dan: You're right, solved it. – kidmose Feb 6 '15 at 10:43
0

On Ubuntu 16.04.3 LTS:

  1. touch /var/log/mail.log /var/log/mail.err
  2. chown syslog:adm /var/log/mail.log /var/log/mail.err
  3. service postfix reload

After those three commands you should have new records inside of /var/log/mail.log:

Jan 18 05:14:21 ubuntu-srv postfix/master[9405]: reload -- version 3.1.0, configuration /etc/postfix


Another way to see some short history of necessary logs including whats happeinging postfix is the journalctl command

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