Multiple IPs for outgoing mail to select specific IP dynamically.

From: taesam.kim@xxxxxxxxx
Date: Mon, 28 Jul 2008 13:56:05 -0700 (PDT)

Hi,
I have multiple IPs/Domain on a linux server.
For example,
eth0 is 1,2,3,4 ->domainA.com
eth0:0 is 6.7.8.9 -> domainB.com
eth0:1 is 10.11.12.13 -> domainC.com

When I send out a mail from the server and check the receiver's email
header, Received: header contains always primary IPs (eth0)
For example, Received: from [1.2.3.4] (helo=domainB.com)

I know that I can use ClientPortOptions, but I don't like to change
the Addr=x.x.x.x every time I change the domain for sender in
sendmail.cf and restart it.

Is there a way to configure changing the IPs dynamicaly based on the
hostname?
So, when I send out a mail using domainB.com, I want to sendmail
automactically insert IP (6.7.8.9) in to the header, I want to see the
IP (6.7.8.9) in Received: header in receiver's email.

I spent searching for this a week, and I still can't find a right
answers.
Would you help me on this, sendmail gurus?

Thanks.
Sam.
.

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