DragonFly lists mailman headers appear to be malformed

[Stephen Welker]

Some the headers in messages sent by mailman appear to be malformed:

--- snip ---
...
Return-Path: <>
...
X-Original-To: users at dragonflybsd.org
Delivered-To: users at dragonflybsd.org
...
Date: 8 Oct 2022 16:15:02 +1100
Message-ID: ...
From: ...
To: users at dragonflybsd.org
MIME-Version: 1.0
...
Subject: Re: Bugs in daily security output
Content-Language: en-AU
...
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-BeenThere: users@
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: DragonFly user topics <users.>
List-Unsubscribe: <https://lists.dragonflybsd.org/mailman/option/users>,
  <mailto:users-request@?subject=unsubscribe>
List-Archive: <http://lists.dragonflybsd.org/pipermail/users/>
List-Post: <mailto:users@>
List-Help: <mailto:users-request@?subject=help>
List-Subscribe: <https://lists.dragonflybsd.org/mailman/listinfo/users>,
  <mailto:users-request@?subject=subscribe>
Errors-To: users-bounces@
Sender: "Users" <users-bounces@>
-- snip ---

Any ideas?

-- 
regards,
Stephen Welker.