[Exim] enveloppe in the 3.16

Hi all,

I'm a bit confused since I use exim 3.16. It seems that the enveloppe is
different with this version of exim than the previous.

eg:

>From test@??? Thu Jan 25 21:06:56 2001

Received: from some.machine.org ([x.x.x.x] helo=test)
        by some.othermachine.org with esmtp 
        id 14LsfX-0007iW-00
        for <testuser@???>; Thu, 25 Jan 2001 21:06:55 +0100
Received: from localhost ([127.0.0.1] helo=test)
        by xxxxxxxxx with esmtp (Exim 3.16 #1 (Debian))
        id 14Lsa7-0007h1-00; Thu, 25 Jan 2001 12:01:19 -0800
From: test@???
Subject: test
X-Mailer: Mailman v2.0
etc...

The first "from": From test@??? Thu Jan 25 21:06:56 2001
seems to be taken instead of the second one by some mail clients
(especially Outlook on Mac)

The result is that the final mail is not well rendered by the mail
client.
After the first "from", the rest of the mail is shifted right.

Do you known what is it? Does I misconfigured something?

Thanks for the help.

Laurent Luyckx