comp.os.linux.networking

On Thu, 13 Mar 2008 13:58:25 +0100, Peter Ludikovsky wrote:

> Jack Snodgrass wrote:
>> I'm pretty sure that this has been asked before... but I googled a bit
>> and could not find an answer....
>>
>> I have a server running postfix ( don't think that the mail server
>> software will make a difference ) and it has a primary IP Address
>> and a 2nd / virtual IP Address. The 2nd / virtual IP address is
>> reverse mapped back to my domain so when I send mail, I want that
>> IP Address to be associated with the connection. Normally, the main
>> IP Address on the Interface is used.... this does not reverse back
>> to my domain so I need to use the 2nd / virtual Ip address on the
>> outgoing mail connects. Some mail servers do a reverse lookup on
>> the incoming connection and act differently if you say that you
>> are 'y' but your reverse lookup says that you are 'x'.
>>
>> I am pretty sure that iptables is the answer... but I'm not sure
>> if I want to mangle or snat or what....
>>
>> Thanks - jack
>>
>
> In postfix main.cf set (according to man 5 postconf
> [http://linux.die.net/man/5/postconf])
> inet_interfaces =
>
> HTH
> /peter

thanks... but that is for incoming mail... that tells postfix which
ip addresses you want to listen on... when it send mails, it goes
out the default iface and uses the main ip address associated with
it...

jack

--
D.A.M. - Mothers Against Dyslexia

see http://www.jacksnodgrass.com for my contact info.

jack - Grapevine/Richardson