multi instances and multi interfaces
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From: Patrick Chemla on 25 Apr 2010 02:08 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
From: Mihira Fernando on 25 Apr 2010 02:17 On Sun, 25 Apr 2010 09:08:22 +0300 Patrick Chemla <patrick.chemla(a)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. Mihira.
From: Wietse Venema on 25 Apr 2010 09:47
Mihira Fernando: > On Sun, 25 Apr 2010 09:08:22 +0300 > Patrick Chemla <patrick.chemla(a)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 |