title: docker postfix - missing logs
body: <p>I created docker container like this:</p>
  
  <pre><code>FROM debian
  
  RUN export DEBIAN_FRONTEND=noninteractive
  RUN apt-get update
  RUN apt-get install -y syslog-ng syslog-ng-core
  RUN apt-get install -y postfix vim \
  &amp;&amp; rm -rf /var/lib/apt/lists/*
  
  CMD /etc/init.d/postfix start &amp;&amp; /bin/bash
  </code></pre>
  
  <p>And start it like this:</p>
  
  <pre><code>docker run --name testmailsrv -p 25:25 -p 143:143 -p 993:993 -v mailsrvpostfixetc:/etc/postfix -v mailsrvdovecotetc:/etc/dovecot -it mailsrv/mailsrv-0.6:latest
  </code></pre>
  
  <p>My postrix is not working properly, but I can't find any logs to diagnose it. No file /var/log/mail.log, no output from journalclt, nothing interesting from "docker logs" command.
  How can I see any log from postfix in docker?</p>