Content-Transfer-Encoding header missing

[I-am-drv-users]

When sending a digest, Mailman 2.0.9 doesn't include a
Content-Transfer-Encoding header, yet it seems to
encode the messages with quoted-printable. As per IRC
2045:
  "Content-Transfer-Encoding: 7BIT" is assumed if the
Content-Transfer-Encoding header field is not present.

In particular, =## sequences are included, which are
not decoded correctly by mail readers (tested with
Mozilla Thunderbird), because the
Content-Transfer-Encoding does not specify
quoted-printable.

The digests include correct MIME version and
Content-type headers, but Content-Transfer-Encoding has
been missing in all cases I have seen.

Example:
------------
From - Tue Oct 25 12:01:55 2005
X-Account-Key: account2
X-UIDL: 406934627
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
Received: from lists-outbound.sourceforge.net
[66.35.250.225] by wwimail002.winsdns.com with ESMTP
  (SMTPD32-8.15) id A05B2BFF00F0; Tue, 25 Oct 2005
01:19:23 -0400
Received: from projects.sourceforge.net
(sc8-sf-list2-b.sourceforge.net [10.3.1.8])
 by sc8-sf-spam1.sourceforge.net (Postfix) with ESMTP
 id E7BDE88948; Mon, 24 Oct 2005 22:20:05 -0700 (PDT)
Date: Mon, 24 Oct 2005 22:09:26 -0700
From: <email address hidden>
Subject: Freedos-devel digest, Vol 1 #668 - 4 msgs
X-Mailer: Mailman v2.0.9-sf.net
MIME-version: 1.0
Content-type: text/plain
To: <email address hidden>
Sender: <email address hidden>
Errors-To: <email address hidden>
X-BeenThere: <email address hidden>
X-Mailman-Version: 2.0.9-sf.net
Precedence: bulk
Reply-To: <email address hidden>
X-Reply-To: <email address hidden>
List-Unsubscribe:
<https://lists.sourceforge.net/lists/listinfo/freedos-devel>,
 <mailto:<email address hidden>?subject=unsubscribe>
List-Id: <freedos-devel.lists.sourceforge.net>
List-Post: <mailto:<email address hidden>>
List-Help:
<mailto:<email address hidden>?subject=help>
List-Subscribe:
<https://lists.sourceforge.net/lists/listinfo/freedos-devel>,
 <mailto:<email address hidden>?subject=subscribe>
List-Archive:
<http://sourceforge.net/mailarchive/forum.php?forum=freedos-devel>
Message-Id:
<email address hidden>
-------------

I have only verified this for digests sent by
"X-Mailer: Mailman v2.0.9-sf.net" (for mailing lists of
sf.net projects).

[http://sourceforge.net/tracker/index.php?func=detail&aid=1337731&group_id=103&atid=100103]

[Tokio Kikuchi (tkikuchi)]

mailman 2.1.x includes the fix. Please update.