Jak na email s konverzacema?

Snazim se udelat automaticky odpovidac na emaily a chtel bych, aby gmail spravne pochopil odpoved a priradil ji do konverzace (thread). Myslel jsem, ze to je jenoduche, avsak nedari se mi to implementovat. Nevite nekdo, na zaklade ceho to gmail (a asi i ostatni klienti) paruje?

Myslel jsem, ze kdyz nastavim spravne hlavicky From, In-Reply-To a References, tak to bude fungovat, ale ne :(

Hlavicka odchoziho emailu (poslano z gmail):

MIME-Version: 1.0
Received: by 10.213.36.5 with HTTP; Tue, 29 Mar 2011 03:13:51 -0700 (PDT)
X-Originating-IP: [86.6.112.148]
Date: Tue, 29 Mar 2011 11:13:51 +0100
Delivered-To: juzna@juzna.cz
Message-ID: <AANLkTik=hjS85C9A=vkRw3DAKLEKiKm4qYTugR4Yka-8@mail.gmail.com>
Subject: Dotaz
From: Jan Dolecek <juzna@juzna.cz>
To: juzna@XXX.net
Content-Type: multipart/alternative; boundary=0015174bde8e16f61e049f9c51ae

Hlavicka odpovedi:

Delivered-To: juzna@juzna.cz
Received: by 10.213.36.5 with SMTP id r5cs150321ebd;
        Tue, 29 Mar 2011 03:13:53 -0700 (PDT)
Received: by 10.204.20.70 with SMTP id e6mr4785626bkb.145.1301393633229;
        Tue, 29 Mar 2011 03:13:53 -0700 (PDT)
Return-Path: <nobody@XXX.net>
Received: from XXX.net (helemik.cz [85.132.153.5])
        by mx.google.com with SMTP id c15si6473414bkc.99.2011.03.29.03.13.51;
        Tue, 29 Mar 2011 03:13:52 -0700 (PDT)
Received-SPF: neutral (google.com: 85.132.153.5 is neither permitted nor denied by best guess record for domain of nobody@XXX.net) client-ip=85.132.153.5;
Authentication-Results: mx.google.com; spf=neutral (google.com: 85.132.153.5 is neither permitted nor denied by best guess record for domain of nobody@XXX.net) smtp.mail=nobody@XXX.net
Received: by XXX.net (Postfix, from userid 65534)
	id 9F4F2FBC9; Tue, 29 Mar 2011 12:13:51 +0200 (CEST)
To: juzna@juzna.cz
Subject: =?windows-1250?B?UG90dnJ6ZW7tIG8gZG9ydehlbu0gcG9k4W7t?=
X-PHP-Originating-Script: 0:mail_podatelna.php
MIME-Version: 1.0
Message-Id: <b38edc8b62acb84df381afe3d5c65296af272d2c-auto@XXX.net>
In-Reply-To: <AANLkTik=hjS85C9A=vkRw3DAKLEKiKm4qYTugR4Yka-8@mail.gmail.com>
References:  <AANLkTik=hjS85C9A=vkRw3DAKLEKiKm4qYTugR4Yka-8@mail.gmail.com>
From: =?windows-1250?B?RWxla3Ryb25pY2vhIHBvZGF0ZWxuYQ==?= <juzna@XXX.net>
Content-Type: text/plain; charset=windows-1250
Content-Transfer-Encoding: base64
Date: Tue, 29 Mar 2011 12:13:51 +0200 (CEST)

Diky za jakekoliv napady