Eray Aslan:
> # postfix start
> postfix/postfix-script: starting the Postfix mail system
> # echo $?
> 0
As documented in the Postfix manpage:
start Start the Postfix mail system. This also runs the configuration
check described above.
status Indicate if the Postfix mail system is currently running.
Init/upstart/systemd/launchpad/whatever scripts are OS-specific.
They are not part of Postfix. They are the responsibility of the
OS-specific port maintainer.
I would also like to reiterate that the "postfix" command is the
sole supported interface for starting and stopping Postfix. All
support of Postfix is canceled when start/stop/status are managed
by direct manipulation of the Postfix master daemon.
Wietse