Cara setting postfix sebagai relay only

Buka file konfigurasi postfix
#nano /etc/postfix/main.cf

1. Rubah & tambah bagian berikut :

#Additional
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination

myhostname = proxy.kpid.co.id
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = localhost
relayhost = smtp.ntt.net.id
relay_domains = $mydestination
mynetworks = 127.0.0.0/8 192.168.1.0/24 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command =
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
default_transport = smtp
relay_transport = smtp
inet_protocols = all

2. Lalu simpan dan restart service postfix
root@proxy:~# service postfix restart