[d3v1ous]

I want to setup postfix only from localhost. When somebody want to send mail outside from localhost, the mail will be rejected.

[jledhead]

this should do it, use in your /etc/postfix/main.cf

inet_interfaces = localhost

you could also just close the port access, which would be the best method instead of exposing it to the net.

[d3v1ous]

not work

myhostname = localhost
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = localhost
mydestination = $myhostname, localhost.$mydomain, localhost
relayhost =
mynetworks = 127.0.0.0/8
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 51200000
recipient_delimiter = +
inet_interfaces = localhost
inet_protocols = ipv4

with this configuration, users is able to send mails outisde, i want to send only to localhost, how i do this

[qhess77]

You can try mydestination = localhost