Prob d'envoi d'email avec rendez vous (calendrier)

Bonjour,

Impossible de recevoir correctement un email avec rendez vous (du calendrier)
d'un outlook 2003 (sous XP Pro SP2) vers un outlook 2003 (sous XP Pro SP2)
voila le mail que je recois à la place du "mail rendez-vous" :

Pensez vous que ca vient du serveur wanadoo ? ou bien une option de outlook
mal configurée ?

Return-Path: <organiseur-rendez-vous@wanadoo.fr>
Received: from mwinf5102.me-wanadoo.net (mwinf5102.me-wanadoo.net)
by mwinb2101 (SMTP Server) with LMTP; Fri, 26 Jan 2007 09:55:16
+0100
X-Sieve: Server Sieve 2.2
Received: from me-wanadoo.net (localhost [127.0.0.1])
by mwinf5102.me-wanadoo.net (SMTP Server) with ESMTP id 126071C0FCF4
for <wfr400003d219c704385413b76e@back21-mail01-01.me-wanadoo.net>;
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by mwinf2009.orange.fr (SMTP Server) with ESMTP id E33091C0012F
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Received: from pc (LNeuilly-XXX-XX-XXX-XXX.w193-251.abo.wanadoo.fr
[193.251.XXX.XXX])
by mwinf2009.orange.fr (SMTP Server) with ESMTP id 9CA1F1C000FB
for <destinataire-du-rendez-vous@wanadoo.fr>; Fri, 26 Jan 2007 09:55:15
+0100 (CET)
X-ME-UUID: 20070126085515641.9CA1F1C000FB@mwinf2009.orange.fr
From: "L'organiseur du rendez vous (expediteur)"
<ORGANISEUR-DU-RENDEZ-VOUS@wanadoo.fr>
To: <destinataire-du-rendez-vous@wanadoo.fr>
Subject: Nouveau Rendez vous
Date: Fri, 26 Jan 2007 09:50:44 +0100
MIME-Version: 1.0
Content-Type: text/calendar; method=REQUEST;
charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Thread-Index: AcdBJxDyRSSbzPgLQzyrpc0uRowVow==
Message-Id: <20070126085515.9CA1F1C000FB@mwinf2009.orange.fr>
X-me-spamlevel: not-spam
X-me-spamrating: 14.155027

BEGIN:VCALENDAR
PRODID:-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN
VERSION:2.0
METHOD:REQUEST
BEGIN:VEVEN
ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:DESTINATIRE-DU-RENDEZ-VOUS@wanadoo.fr
ORGANIZER:MAILTO:ORGANISEUR-DU-RENDEZ-VOUS@wanadoo.fr
DTSTART:20070125T070000Z
DTEND:20070125T123000Z
LOCATION:PARIS
TRANSP:OPAQUE
SEQUENCE:0
UID:040000008200E00074C5B7101A82E00800000000005EB4722F41C7010000000000000000
100
00000B09583CC896AEE4B8A02028CB192881F
DTSTAMP:20070126T085044Z
DESCRIPTION:Quand : jeudi 25 janvier 2007 08:00-13:30 (GMT+01:00)
Bruxelles\, Copenhague\, Madrid\, Paris.\nEmplacement :
PARIS\n\n*~*~*~*~*~*~*~*~*~*\n\n\n
SUMMARY:Nouveau rendez vous
PRIORITY:5
X-MICROSOFT-CDO-IMPORTANCE:1
CLASS:PUBLIC
BEGIN:VALARM
TRIGGER:-PT15M
ACTION:DISPLAY
DESCRIPTION:Reminder
END:VALARM
END:VEVENT
END:VCALENDAR