Les mails de mon domaine considéré comme spam

Bonjour tout le monde


Voilà , j’ai un nom de domaine depuis 2008 et depuis une bonne année, certains de mes clients ne reçoive plus les mails de mon site, il vont directement en spam.

J’ai remarqué que c’était principalement des adresses gmail mais pas que…

J’aimerais savoir comment sortir de cette situation qui est maintenant devenu insupportable et une perte de temps avec mes clients.

En cherchant sur le net j’ai vu qu’il existait https://www.gmail.com/postmaster/
Est-ce utile ?

Mon webmaster ma confirmé que tout étais bien configuré et qu’il ne pouvait rien faire d’autre .

Ce que j’aimerais savoir c’est par quoi commencer pour connaître les raisons de ce spam et avec quel méthodes ?

Je vous remercie d’avance pour vos réponses

Voici une entête de mail reçu dans les spams :

Code:

Delivered-To: xxxxx@xxxxxcom

Received: by 2002:ac9:3224:0:0:0:0:0 with SMTP id t33csp103216occ;

Wed, 27 Jan 2021 02:04:20 -0800 (PST)

X-Google-Smtp-Source: ABdhPJyVVAhE/ru901Omz+UkJzbEW5dAch6I105VpLTWsbLoyuw6BJTW8x2MbAAnGnoLHNEcOy+L

X-Received: by 2002:a5d:6305:: with SMTP id i5mr10132895wru.314.1611741859815;

Wed, 27 Jan 2021 02:04:19 -0800 (PST)

ARC-Seal: i=1; a=rsa-sha256; t=1611741859; cv=none;

d=google.com; s=arc-20160816;

b=eg7wqy0BkGWNy7IpkN32OcQc3N9PGBNAshP1EhYKvpijrM5w9Owvo+77KEguShTJyy

2NFHFGMHnlz2rXMVJwGK0tMK+UPuIWI/ljY7/+I50jz+zjbgCw3kZuJgYMkjXxwEFoUW

sYTTqWo0tcPSO4uxWK552Cbe9p7M5e3ufcxyciQsQcegfse9Kyj86zzVJgv1QyF5cOTO

E0s1dFKWxaQBqAbSlUJy0gsZ/L6MNXGnf+Q662Eoln0ikDmRsKvr3s4KLvVjWhEQc8TZ

kMfb5RJHEUYMcPlCboQ6IMLPwSz0LkxYsdcX/IHpE4XOMuetX/o8rJR6P3MTURscVPpG

eIWw==

ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;

h=content-transfer-encoding:mime-version:message-id:subject:reply-to

:from:to:date:delivered-to;

bh=ZO90N2r0Z32YNNVH2NFnRMYCtKVmaYuKb3Bt5uARcEA=;

b=gU4qIHnMX7Pj/JCEMAIFUzU4uW/yP5r3RbBpbsE4LcvmhftTNpRC0yyoYm/7Qiq5dO

70yik3/3xbSIwiDmV0pT/IBkRR4i8fXeKr/KMDyeVr8wgXClfsjew/XojIWQpFEwjBpI

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NY+3TLQPM604t+F3LTwyvxjJHQJDMiAjCjaX13gIWDh8i+uLeGBp5tcVd8evaqVEOxMe

Ymik5gQTT2QR0ltqNFVTyxYQgdEXwdCHea4X9J00wICTdVwnENgIbo02tWURyA8poWdm

crhQ==

ARC-Authentication-Results: i=1; mx.google.com;

spf=pass (google.com: domain of xxxxx@xxxxx.com designates 174548.1470.441.1471 as permitted sender) smtp.mailfrom=xxxxx@xxxxx.com

Return-Path: <xxxxx@xxxxx.com>

Received: from frhb455252421ds.ikexpress.com (fr4hb424424524521ds.ikexpress.com. [178.170.41.171])

by mx.google.com with ESMTPS id a7si1262078wmm.123.2021.01.27.02.04.19

for <xxxxx@xxxxxcom>

(version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128);

Wed, 27 Jan 2021 02:04:19 -0800 (PST)

Received-SPF: pass (google.com: domain of xxxxx@xxxxx.com designates 178.70.41.171 as permitted sender) client-ip=178.1;

Authentication-Results: mx.google.com;

spf=pass (google.com: domain of xxxxx@xxxxx.com designates 17 as permitted sender) smtp.mailfrom=xxxxx@xxxxx.com

Received: by frhb42421ds.ikexpress.com (Postfix, from userid 30)

id 87EE56620B5D; Wed, 27 Jan 2021 11:04:19 +0100 (CET)

X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on

fxxrhbxx4x2421ds.ikexpress.com

X-Spam-Level:

X-Spam-Status: No, score=-1.0 required=7.0 tests=ALL_TRUSTED,HTML_MESSAGE,

T_REMOTE_IMAGE,URIBL_BLOCKED autolearn=ham autolearn_force=no

version=3.4.2

X-Original-To: xxxxx@xxxxx.com

Delivered-To: xxxxx@xxxxx.com

Received: from xxxxxxxxx (frxxhbx42421ds.ikexpress.com [])

by frhb42421ds.ikexpress.com (Postfix) with ESMTPSA id BE65D6620B5B;

Wed, 27 Jan 2021 11:04:18 +0100 (CET)

Date: Wed, 27 Jan 2021 11:04:18 +0100

To: "lxxxx@gmail.com" <lxxxxx@gmail.com>

From: "xxxx.com" <xxxxx@xxxxx.com>

Reply-To: "xxxxx@xxxxx.com" <xxxxx@xxxxx.com>

Subject: Votre commande sur xxxxxxxxxxx

Message-ID: <5242d217944f1b283bad4eb26bad4733@xxxxxxx.com>

X-Mailer: PHPMailer 5.2.23 (https://github.com/PHPMailer/PHPMailer)

MIME-Version: 1.0

Content-Type: multipart/alternative;

boundary="b1_5242d217944f1b283bad4eb26bad4733"

Content-Transfer-Encoding: 8bit