Mihira Fernando:
> On Sun, 25 Apr 2010 09:08:22 +0300
> Patrick Chemla <patrick.che...@perfaction.net> wrote:
>
> > Hi,
> >
> > I am running a smtp relay for different domains, and I want to
> > separate all traffic.
> >
> > I would like to bind for each domain the same IP address to receive
> > and send messages, and it should be for each domain its own public IP
> > address.
> >
> > I understand that with postfix 2.7.0 multi-instances feature I can
> > handle separate inbound queues on one system, so each queue can have
> > its own IP address, but what about the outbound messages ?
> >
> > When users will post messages to relay outside, will the sending
> > process bind the output on the same IP interface from where it got
> > the message? I wonder it will be routed according to the route table
> > through the default interface.
> >
> > Is there a way to send through separate interfaces ?
> >
> > Thanks for help
> > Patrick
>
> For each instance, set the smtp_bind_address to the desired IP.
>
> see http://www.postfix.org/postconf.5.html#smtp_bind_address for
> details.
Since these instances also receive mail, you will need to set
the following in main.cf:
myhostname also supplies the default for smtp_helo_name
and a lot of other things.
inet_interfaces required for mail loop detection, and for
some of the finer details of SMTP.
proxy_interfaces required if inet_interfaces contains
a non-routable address such as 192.168.
These are required besides the settings that all MTA instances need:
myorigin, mydestination
Wietse
