[Dovecot] forwarded message is broken in 2.2.10 with pigeonhole-0.4.2

Wed Jan 15 11:17:54 EET 2014

Hi,
forwarding a message with sieve like

redirect:copy "me at other.domain";

was working without any problem until dovecot-2.1.17, dovecots lmtp and 
dovecot-2.1-pigeonhole-0.3.5.

Using dovecot-2.2.10 , dovecots lmtp and dovecot-2.2-pigeonhole-0.4.2 
the structure of a forwarded message is broken. Content of a message is 
not displayed or an attachment (for instance pdf) can not be opened by 
(different) clients. Writing a html mail or plain one makes no different.

I have compared two messages and the main different is a missing

Content-Type: multipart/alternative;
  boundary="...."

to encapsulate the body of the forwarded message. Was it lost in sieve?

Here parts of a "well" forwarded message:

Return-Path: ...
...
Received: by mails.cms.hu-berlin.de (Postfix, from userid 29)
	id A78C738734; Tue, 14 Jan 2014 17:10:54 +0100 (CET)
X-Sieve: Pigeonhole Sieve 0.3.5
X-Sieve-Redirected-From: schmidt at mails.cms.hu-berlin.de
Delivered-To: <schmidt at mails.cms.hu-berlin.de>
Received: from mails.cms.hu-berlin.de
	by suncom1 (Dovecot) with LMTP id p8HoIn9h1VKnTwAA9XuJ/g
	for <schmidt at mails.cms.hu-berlin.de>; Tue, 14 Jan 2014 17:10:54 +0100
...
Message-ID: <52D5618D.6050905 at gmail.com>
Date: Tue, 14 Jan 2014 17:10:53 +0100
From: xy <xy at gmail.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 
Thunderbird/24.2.0
MIME-Version: 1.0
To: schmidt at hu-berlin.de
Subject: from gmail with attachment
Content-Type: multipart/mixed;
  boundary="------------070108020005050001040207"
X-ENVELOPE-TO: <me at other.domain>
This is a multi-part message in MIME format.
--------------070108020005050001040207
Content-Type: multipart/alternative;
  boundary="------------090806050202050708030507"

--------------090806050202050708030507
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 8bit

Hallo.

text

--------------090806050202050708030507
Content-Type: text/html; charset=ISO-8859-15
Content-Transfer-Encoding: 8bit

<html>
   <head>

     <meta http-equiv="content-type" content="text/html; 
charset=ISO-8859-15">
   </head>
   <body text="#000000" bgcolor="#FFFFFF">
     Hallo.<br>
     <br>
     <u>text</u><br>
     <br>
     P.<br>
   </body>
</html>

--------------090806050202050708030507--

--------------070108020005050001040207
Content-Type: application/pdf;
  name="auftrag-2014-eng-Hinweise.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
  filename="auftrag-2014-eng-Hinweise.pdf"

JVBERi0xLjYNJeLjz9MNCjcyIDAgb2JqDTw ...
...
c3RyZWFtDWVuZG9iag1zdGFydHhyZWYNCjExNg0KJSVFT0YNCg==
--------------070108020005050001040207--
message end

Now a broken message without "Content-Type: multipart/alternative;":

Return-Path: ...
...
Received: by mail5.cms.hu-berlin.de (Postfix, from userid 29)
	id 47C4C6D46E; Tue, 14 Jan 2014 17:43:54 +0100 (CET)
X-Sieve: Pigeonhole Sieve 0.4.2
X-Sieve-Redirected-From: testuser at mail5.cms.hu-berlin.de
Delivered-To: <testuser at mail5.cms.hu-berlin.de>
Received: from mail5.cms.hu-berlin.de
	by suncom5 (Dovecot) with LMTP id mnY0AEpp1VLsaQAA0tuC1A
	for <testuser at mail4.cms.hu-berlin.de>; Tue, 14 Jan 2014 17:43:54 +0100
...
Message-ID: <52D56948.1090704 at gmail.com>
Date: Tue, 14 Jan 2014 17:43:52 +0100
From: xy <xy at gmail.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 
Thunderbird/24.2.0
MIME-Version: 1.0
To: testuser at hu-berlin.de
Subject: from gmail with attachment
Content-Type: multipart/mixed;
  boundary="------------030506080302040201020604"
X-ENVELOPE-TO: <me at other.domain>

This is a multi-part message in MIME format.
--------------030506080302040201020604
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit

text.

--------------030506080302040201020604
Content-Type: application/pdf;
  name="auftrag-2014-eng-Hinweise.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
  filename="auftrag-2014-eng-Hinweise.pdf"

JVBERi0xLjYNJeLjz...
...
c3RyZWFtDWVuZG9iag1zdGFydHhyZWYNCjExNg0KJSVFT0YNCg==
--------------030506080302040201020604--
message end

-- 
Mit freundlichen Grüßen --- Burckhard Schmidt

Abteilung Systemsoftware und Kommunikation
ZE Computer- und Medienservice der Humboldt-Universität zu Berlin
Postanschrift: Unter den Linden 6, 10099 Berlin
Standort:      Rudower Chaussee 26; 12489 Berlin
Tel.:          +49-30-2093-70058  Fax: +49-30-2093-2959
Mail:          bschmidt at cms.hu-berlin.de