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Configuring Received: headers for outbound mail

From: Bigley, Steve (steve.bigleycybertrust.com)
Date: Tue Mar 01 2005 - 12:17:30 CST

Hi. I've been using sendmail for well over a decade, but am now making
the transition to postfix. We're using postfix 2.1.5, and we're trying
to modify what postfix writes in its Received: headers for outbound
mail. Right now it's putting in the MTA version and Postfix user id,
which is a bit more information than I care to reveal for outbound mail.
We'd like to quiet that a bit so that it doesn't reveal the MTA in use,
or its associated UID. In sendmail one would do a
define('confRECEIVED_HEADER','string') but I can find no reference to
this option in either the K. Dent postfix book, the main.cf.default, or
any of the readmes.

Here's what we have now in the chain:

Received: from external-relay.mydomain.com (external-relay.mydomain.com
[111.22.33.44])
        by internal-relay.mydomain.net (Postfix) with ESMTP id E52E31DE2
Received: by external-relay.mydomain.com (Postfix)
        id DD5E7B7; Wed, 16 Feb 2005 18:31:41 -0500 (EST)
Delivered-To: myaddressmydomain.com
Received: by external-relay.mydomain.com (Postfix, from userid 6000)
        id D6A40C7; Wed, 16 Feb 2005 18:31:41 -0500 (EST)

All I really want to get rid of is the MTA advertisement and the
associated user ID. Is there an option to configure this? If so, what
would it be?

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