how to make postfix listen for 2 IP?

jimmyjiang · 09-13-2007, 11:54 AM

hi,
I have a linux+postfix mail server, and it has 2 internal IP, and I want to make postfix listen to both of them, so when emails coming in, postfix can deliver them to diffence public IP depend on which internal IP them send to.
anyone has idea? and does someone know any mail agent other than postfix can handle 2 IPs sametime?
thanks in advance!
jimmy

shawnbishop · 09-14-2007, 05:08 AM

Hi

Check under the mynetworks and , the default for postfix is to listen on any avaliable NIC

jimmyjiang · 09-14-2007, 08:53 AM

you are right, by default "inet_interfaces = all",
but it actually only stick to the primary interfaces, and all smtp mail go thought it.

Berhanie · 09-15-2007, 07:32 PM

You can start two listening processes through master.cf, but, short of using two postfix instances, that will not solve your problem. See here.

jimmyjiang · 09-24-2007, 12:42 PM

please tell me what should I add in master.cf ? so I can make postfix listening 2 Ip on diffent ports. like following:

192.168.1.102 port25
192.168.1.102 port26

thanks!

Berhanie · 09-24-2007, 07:01 PM

You should read the man page:

Code:

man 5 master

What you'd put in master.cf is:

Code:

192.168.1.102:25      inet  n       -       n       -       -       smtpd
192.168.1.102:26      inet  n       -       n       -       -       smtpd

But, as stated previously, this will not solve your problem.