Edit the file /etc/postfix/master.cf
It probably looks like this
=============================================================Change it to
service type private unpriv chroot wakeup maxproc command
(yes) (yes) (yes) (never) (100)
=============================================================
smtp inet n - - - - smtpd
=============================================================Now restart and reload the postfix mail server and you’re good to go.
service type private unpriv chroot wakeup maxproc command
(yes) (yes) (yes) (never) (100)
=============================================================
smtp inet n - n - - smtpd
[root@mail ~]# /etc/init.d/postfix restart
Shutting down postfix: [ OK ]
Starting postfix: [ OK ]
[root@mail ~]# /etc/init.d/postfix reload
Reloading postfix: [ OK ]
