linux...@gmx.net:
> dear list,
>
> I am using postfix as mail relay which is deployed on gateway for internal
> users.
> This relay send mail out only, doesn't accept messages.
> My question is, do I need to make the relay server port 25 listened on
> 0.0.0.0? or just 127.0.0.1 should work?
If you don't want to receive mail from the network, then with
inet_interfaces = loopback-only
Postfix will still receive mail on 127.0.0.1 (IPv4), ::1 (IPv6),
or both, depending on the inet_protocols setting.
https://www.postfix.org/postconf.5.html#inet_interfaces
https://www.postfix.org/postconf.5.html#inet_protocols
Wietse
