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Postfix Archives: Re: 2 SMTP Relays, depending on the From: add

Re: 2 SMTP Relays, depending on the From: address

Subject: Re: 2 SMTP Relays, depending on the From: address
From: Wietse Venema (wietseporcupine.org)
Date: Sun Jan 02 2000 - 08:15:48 CST

Two comments:

- There's no need to make duplicate copies of programs. You can
share the same Postfix daemon and command executable files among
multiple postfix instances.

- There's no need for the 127.0.0.2 second loopback interface.
Postfix will run just fine with one interface.

        Wietse

Alexis Maldonado:
> Hello!
>
> On Sat, Jan 01, 2000 at 05:57:56PM -0500, Wietse Venema wrote:
> > Use two Postfix instances on the same machine, each with different
> > settings for:
> >
> > PARAMETER FOO.COM BAR.COM
> > =========================================================
> > myorigin foo.com bar.com
> > inet_interfaces x.x.x.x y.y.y.y 127.0.0.1
> > relayhost smtp.foo.com mail.bar.com
> >
> > You have two config directories.
>
> Thank you for your advice.
>
> It works perfectly now!
>
>
> Just in case this information will help anyone, here's how I did it:
>
> First I configured Postfix according to the FAQ section that talks about
> dial-up machines. I had it working fine for my first provider (bar.com),
> then I started to make changes for the second provider:
>
>
>
> I used IP aliasing to get another address for my server:
>
> ifconfig eth0:0 192.168.1.9 netmask 255.255.255.0
> ifconfig lo:0 127.0.0.2
>
> (If this doesn't work, then you have to compile a kernel with support for
> IP: Aliasing support)
>
> My regular IP for this machine is 192.168.1.8
>
> So, according to your table:
> x.x.x.x == 192.168.1.8
> y.y.y.y == 192.168.1.9
>
>
> I had to create several directories to have both instances of Postfix
> running:
>
> cp -a /etc/postfix /etc/postfix2
> cp -a /usr/lib/postfix /usr/lib/postfix2
>
>
> I created user postfix2.
>
>
> Then I edited /etc/postfix/main.cf and /etc/postfix2/main.cf:
>
>
> * FOO.COM (/etc/postfix)
>
> In /etc/postfix/main.cf:
>
> myorigin = foo.com
> inet_interfaces = 192.168.1.8 127.0.0.1
> relayhost = smtp.foo.com
>
>
> (It wouldn't deliver mail if I had " = 192.168.1.8" only)
> (I don't know why.)
>
>
> * BAR.COM (/etc/postfix2)
>
>
> In /etc/postfix2/main.cf: (Make the nec. changes)
>
> queue_directory = /var/spool/postfix2
> program_directory = /usr/lib/postfix2
> daemon_directory = /usr/lib/postfix2
> mail_owner = postfix2
>
> myorigin = bar.com
> inet_interfaces = 192.168.1.9 127.0.0.2
> relayhost = mail.bar.com
>
>
> transport_maps = hash:/etc/postfix2/transport
> virtual_maps = hash:/etc/postfix2/virtual
>
>
>
> > Start up Postfix with: postfix -c config-directory start
> > Flush queue with: postfix -c config-directory flush
>
>
> This worked great. I just added the following lines to an appropiate
> /etc/init.d script:
>
> postfix -c /etc/postfix start
> postfix -c /etc/postfix2 start
>
>
>
> On the server's /etc/ppp/ip-up.d/ directory I added a script that would send
> the e-mail:
>
>
> postfix -c /etc/postfix flush
> postfix -c /etc/postfix2 flush
>
>
>
>
> Sorry for the long message. I am not sure if I took everything into account,
> so please correct me if I'm mistaken.
>
> Greetings,
>
> Alexis Maldonado
> Disenos y Montajes S.A.
>
>
>
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