pourquoi orange refuse les mails que j'envois

Orange refuse de recevoir les mail d'OVH au mins les miens cela fais 3 mois et tous les autres services les accepte  pourquoi... voici le message d' erreur... This is the mail system at host mo529.mail-out.ovh.net.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<bettina.caignault7@orange.fr>: host smtp-in.orange.fr[80.12.26.32] said: 501
   5.1.0 eG2auGKoD6JI9 Emetteur invalide, Veuillez verifier la configuration
   SPF/DNS de votre nom de domaine. Invalid Sender. SPF check failed, please
   verify the SPF/DNS configuration for your domain name. OFR003_398, please
   visit: https://postmaster.orange.fr/ [398] (in reply to MAIL FROM command)
Reporting-MTA: dns; mo529.mail-out.ovh.net
X-Postfix-Queue-ID: 4bmjgM1b3Yz5xTY
X-Postfix-Sender: rfc822; s.lebeau@alternactif.com
Arrival-Date: Tue, 22 Jul 2025 16:40:31 +0000 (UTC)

Final-Recipient: rfc822; bettina.caignault7@orange.fr
Original-Recipient: rfc822;bettina.caignault7@orange.fr
Action: failed
Status: 5.1.0
Remote-MTA: dns; smtp-in.orange.fr
Diagnostic-Code: smtp; 501 5.1.0 eG2auGKoD6JI9 Emetteur invalide, Veuillez
   verifier la configuration SPF/DNS de votre nom de domaine. Invalid Sender.
   SPF check failed, please verify the SPF/DNS configuration for your domain
   name. OFR003_398, please visit: https://postmaster.orange.fr/ [398]
Return-Path: <s.lebeau@alternactif.com>
Received: from mxplan6.mail.ovh.net (unknown [10.110.54.53])
by mo529.mail-out.ovh.net (Postfix) with ESMTPS id 4bmjgM1b3Yz5xTY;
Tue, 22 Jul 2025 16:40:31 +0000 (UTC)
Received: from alternactif.com (37.59.142.108) by DAG8EX1.mxp6.local
(172.16.2.71) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.44; Tue, 22 Jul
2025 18:40:28 +0200
Authentication-Results: garm.ovh; auth=pass (GARM-108S002d2cdbdfa-42d4-4abb-a71f-c9828f76744c,
                   2DA0A08F699F7A8C0B549A1D1EAA3C15C4ACCB81) smtp.auth=s.lebeau@alternactif.com
X-OVh-ClientIp: 90.0.106.64
From: =?utf-8?Q?St=C3=A9phane_Lebeau?= <s.lebeau@alternactif.com>
Content-Type: multipart/alternative;
boundary="Apple-Mail=_64014C16-03B1-4261-97F2-2CB80342DFAB"
MIME-Version: 1.0 (Mac OS X Mail 16.0 \(3826.400.131.1.6\))
Subject: Book 2025 V2
Message-ID: <0CD46851-3B56-4571-8A3F-D4EB8A80A599@alternactif.com>
Date: Tue, 22 Jul 2025 18:40:16 +0200
To: giboulet bertrand <Bertrand.giboulet60@gmail.com>, bettina Caignault
<bettina.caignault7@orange.fr>
X-Mailer: Apple Mail (2.3826.400.131.1.6)
X-Originating-IP: [37.59.142.108]
X-ClientProxiedBy: DAG5EX2.mxp6.local (172.16.2.42) To DAG8EX1.mxp6.local
(172.16.2.71)
X-Ovh-Tracer-GUID: e87e980b-ff81-49b0-ace0-73502da0c010
X-Ovh-Tracer-Id: 13762437513710471578
X-VR-SPAMSTATE: OK
X-VR-SPAMSCORE: -100
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