Re: Problem with Thunderbird and AmaViS on etch

[Alessandro FAGLIA <a.faglia@farmol.it>]

Thomas Harding wrote:
> On Wed, Mar 14, 2007 at 01:53:13PM +0100, Alessandro FAGLIA wrote:
> > Dear users,
> > I have a mailserver (i386) with etch and amavisd-new 2.4.2-6.1. The only 
> > locales I have generated is en_US ISO-8859-1. On the client side I have 
> > Thunderbird 1.5.0.9 with french localisation.
> >
> > Whenever a mail asks for a return receipt (accusé de réception) and 
> > Thunderbird sends it, amavis mark this as a message with BAD HEADER. 
> > This is what I read in the quarantined mail header:
> > X-Amavis-Alert: BAD HEADER Non-encoded 8-bit data (char E9 hex): Subject:
> >         Accus\351 de r\351ception (...
> >
> > For the moment I solved the problem by setting D_PASS as default policy 
> > for banned messages, but I would like to understand why this happens. Is 
> > this a configuration problem of amavis or what else? I use Thunderbird 
> > also in other languages (italian, english) and I've never experienced 
> > such problem.
>
> The problem comes from thunderbird which MUST send only ASCII characters
> in headers!
>
> only ascii code is allowed in headers, other characters have to be encoded
> (can't find the rfc for characters encoding, but it is something like
> "=iso-8859-1#E9" for <E9> character).
>
> This encoding is the only to passthru following problem: Mime is defined
> into headers, so it is not possible to interpret mime characters into
> headers themselves.

This is the header section of the quarantined mail.

Return-Path: <me@mydom.com>
X-Original-To: banned@mydom.com
Delivered-To: banned@localhost
Received: from localhost (localhost [127.0.0.1])
        by myserver.mydom.com (Postfix) with ESMTP id C26F43E3
        for <banned@mydom.com>; Wed, 14 Mar 2007 17:17:30 +0100 (CET)
X-Envelope-From: <me@mydom.com>
X-Envelope-To: <him@hisdom.com>
X-Quarantine-ID: <CHK+nouFStZc>
X-Amavis-Alert: BAD HEADER Non-encoded 8-bit data (char E9 hex): Subject:
        Accus\351 de r\351ception (...
Received: from myserver.mydom.com ([127.0.0.1])
        by localhost () (amavisd-new, port 10024)
        with ESMTP id CHK+nouFStZc for <him@hisdom.com>;
        Wed, 14 Mar 2007 17:17:17 +0100 (CET)
Received: from [10.37.76.10] (unknown [10.37.76.10])
        by myserver.mydom.com (Postfix) with ESMTP id 39A675A
        for <him@hisdom.com>; Wed, 14 Mar 2007 17:17:17 +0100 (CET)
Date: Wed, 14 Mar 2007 17:18:17 +0100
From:  me@mydom.com
Message-ID: <45F82049.3010804@serioplast.it>
Subject: Accusé de réception (affiché) -  Re:
To:  him@hisdom.com
References: <whatever@hisdom.com
MIME-Version: 1.0
Content-Type: multipart/report; report-type=disposition-notification;
        boundary="------------mdn080202030307070306080208"

--------------mdn080202030307070306080208
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

Ceci est un accusé de réception pour le courrier éléctronique envoyé à 
me@mydom.com.

Note : Cet accusé de réception indique seulement que le message a été 
affiché sur l'ordinateur du destinataire. Il n'y a auc
une garantie que le destinataire ait lu ou appréhendé le contenu du message.


It's hard for me to believe that this is a fault of Thunderbird. If so, 
all french users who are using Thunderbird as MUA and Amavis as content 
filter (on Debian or whatever) are experiencing the same problem.
Can anybody confirm that this is true?


Regards,
Alessandro