However, the command you will most likely be using is the simple 'postfix' command, which accepts the following options:
check
Validate the Postfix mail system configuration. Warn about bad directory/file ownership or permissions, and create missing directories.
start
Start the Postfix mail system. This also runs the configuration check described above.
stop
Stop the Postfix mail system in an orderly fashion. Running processes are allowed to terminate at their earliest convenience.
Note: in order to refresh the Postfix mail system after a configuration change, do not use the start and stop commands in succession. Use the reload command instead.
abort
Stop the Postfix mail system abruptly. Running processes are signaled to stop immediately.
flush
Force delivery: attempt to deliver every message in the deferred mail queue. Normally, attempts to deliver delayed mail happen at regular intervals, the interval doubling after each failed attempt.
reload
Re-read configuration files. Running processes terminate at their earliest convenience.
