Hi,
I'm running postfix as SMTP-server and dovecot as IMAP-server. The server has multiple IPs, and postfix is configured that every domain is using a separate IPv4-address. Examle: foo1.com --> 11.22.33.44 foo2.com --> 22.33.44.55 foo3.com --> 33.44.55.66 bar.org --> 66.77.88.99
The hostname of the server is: mail.bar.org
Now I have a request from one of my customers, who is using 3 different domains:
- foo1.com
- foo2.com
- foo3.com
If he receives a mail to "user@foo1.com", the header of the mail looks like this:
Return-Path: <somebody@web.de>
Delivered-To: <user@foo1.com>(II) Received: from mail.bar.org by mail.bar.org (Dovecot) with LMTP id V[...]wAAvP/pag for user@foo1.com; Sun, 29 Nov 2015 13:45:37 +0100 (I) Received: from mout.web.de (mout.web.de [212.227.17.11]) (using TLSv1.2 with cipher ECDHE-[...]-SHA384 (256/256 bits)) (No client certificate requested) by mail.foo1.com (Postfix) with ESMTPS id A[...]9 for user@foo1.com; Sun, 29 Nov 2015 13:45:36 +0100 (CET)
As you can see in (I), postfix receives the mail and added a header with the correct hostname: mail.foo1.com But dovecot adds an additional header (see II). Here, the hostname of the system is visible. This is correct, because dovecot -n | grep -i hostname returns: hostname = mail.bar.org
But my customer asks me if it's possible that only his domain is visible in the header: So, if somebody sends a mail to "user@foo1.com", only the hostname "mail.foo1.com" should be visible in the mail header. And if somebody sends a mail to "user@foo2.com", only the hostname "mail.foo2.com" should be visible in the mail header.
Is there a way to do this?
Thank you in advance.
Kind regards
Thilo