postfix_exporter/pkg-message

[
{ type: install
  message: <<EOM
For postfix_exporter to read maillog, you need to chown it to prometheus group:
chown :prometheus /var/log/maillog

Also configure newsyslog to apply these rights when rotating log:
/var/log/maillog        root:prometheus   640  7     *    @T00  JC

Create postfix_exporter logfile with:
touch /var/log/postfix_exporter.log && chown prometheus /var/log/postfix_exporter.log
EOM
}
]