post...@ptld.com:
> > As you can see above, with "inet_interfaces = all" Postfix will
> > LISTEN on all available IPv4 (or IPv6) interface addresses, and it
> > will NOT BIND to a specific IPv4 (or IPv6) address.
>
> Sorry if I'm being slow.
> Yes postfix will listen to ALL and bind to 0.0.0.0:25
With inet_interfaces=all,
- The Postfix server code does not choose a specific IP address;
instead (it listens on 0.0.0.0. It does this whether a machine has
one interface or 1000.
- The Postfix SMTP client will not choose a specific IP address
unless you specify one with smtp_bind_address. It does this whether
a machine has one interface or 1000.
> What is unclear to me is what will postfix try to use when making
> an outbound connection when the server has two interfaces, first
When the Postfix SMTP client does not choose an IP address, the
network stack has to choose one.
Wietse
