{"id":13990,"date":"2025-10-13T14:53:50","date_gmt":"2025-10-13T12:53:50","guid":{"rendered":"https:\/\/www.qboxmail.com\/spf-dkim-dmarc-2\/"},"modified":"2026-06-12T14:50:37","modified_gmt":"2026-06-12T12:50:37","slug":"spf-dkim-dmarc","status":"publish","type":"page","link":"https:\/\/www.qboxmail.com\/fr\/spf-dkim-dmarc\/","title":{"rendered":"SPF, DKIM, DMARC"},"content":{"rendered":"\n\n<section class=\"block-section block-title-text block-bg--gradient-start\">\n\t<div class=\"block-content\">\n\t\t<h2 class=\"block-title block-title-text__title\">Du clic sur ENVOYER jusqu\u2019\u00e0 la bo\u00eete de r\u00e9ception du destinataire\u202f: trois mesures de s\u00e9curit\u00e9 en s\u00e9quence<\/h2>\n\t\t<div class=\"block-title-text__text\">\n\t\t\t<p>Dans une infrastructure e-mail, l\u2019authentification se fait par \u00e9tapes. SPF, DKIM et DMARC forment une cha\u00eene de contr\u00f4le de l\u2019envoi \u00e0 la livraison. <\/p>\n<p>Le <strong>SPF<\/strong> d\u00e9finit et v\u00e9rifie, via le DNS, que l\u2019adresse IP de l\u2019exp\u00e9diteur est autoris\u00e9e pour le domaine.<\/p>\n<p>Le <strong>DKIM<\/strong> applique une signature cryptographique qui prot\u00e8ge l\u2019int\u00e9grit\u00e9 du domaine de l\u2019exp\u00e9diteur, en restant valide m\u00eame en cas de transfert.<\/p>\n<p>Le <strong>DMARC<\/strong> corr\u00e8le SPF et DKIM avec l\u2019alignement du champ From et applique une politique sur les messages non conformes, tout en g\u00e9n\u00e9rant des rapports utiles pour d\u00e9tecter les sources ill\u00e9gitimes et les abus.<\/p>\n<p>La s\u00e9quence <strong>SPF \u2192 DKIM \u2192 DMARC<\/strong> renforce la s\u00e9curit\u00e9 et le contr\u00f4le de l\u2019envoi des e-mails d\u2019entreprise, ajoute une couche suppl\u00e9mentaire de protection anti-spoofing et anti-fraude, et permet d\u2019identifier les menaces d\u00e8s leur apparition.<\/p>\n\t\t<\/div>\n\t<\/div>\n<\/section>\n<section class=\"block-section block-img block-bg--secondary\">\n\t<div class=\"block-content\">\n\n\t\t<figure class=\"block-img__img\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.qboxmail.com\/wp-content\/uploads\/2025\/10\/explanation_spf_dkim_dmarc-1280x387.webp\" alt=\"\">\t\t\t\t\t<\/figure>\n\t<\/div>\n<\/section>\n\n<section class=\"block-section block-check-list block-bg--secondary \">\n<div class=\"block-content\">\n  <div>\n          <h2 class=\"block-title\">SPF, DKIM et DMARC\u202f: les b\u00e9n\u00e9fices combin\u00e9s<\/h2>\n    \n    <p>Dans les environnements d\u2019entreprise et professionnels, l\u2019authentification des e-mails concerne toutes les sources d\u2019envoi (CRM, ERP, facturation, support client et autres applications SaaS).<br \/>\nLes b\u00e9n\u00e9fices r\u00e9els n\u2019apparaissent qu\u2019avec une configuration conjointe et correcte de SPF, DKIM et DMARC\u202f: protection de la r\u00e9putation, meilleure d\u00e9livrabilit\u00e9 et visibilit\u00e9 sur l\u2019utilisation de votre nom de domaine.<\/p>\n<p><strong>Quels b\u00e9n\u00e9fices pour les entreprises ?<\/strong><\/p>\n    \n                  <div class=\"block-check-list__item\">\n          <h3>R\u00e9duction du spoofing et du phishing<\/h3>\n          <p data-start=\"0\" data-end=\"55\"><strong data-start=\"0\" data-end=\"12\">Contexte<\/strong> : domaines expos\u00e9s sur plusieurs canaux.<\/p>\n<p data-start=\"57\" data-end=\"183\"><strong data-start=\"57\" data-end=\"71\">M\u00e9canisme<\/strong> : DMARC exige que SPF et DKIM soient valides et align\u00e9s avec le champ From ; dans le cas contraire, le message est rejet\u00e9.<\/p>\n<p data-start=\"185\" data-end=\"253\" data-is-last-node=\"\" data-is-only-node=\"\"><strong data-start=\"185\" data-end=\"196\">R\u00e9sultat<\/strong> : r\u00e9duction drastique des tentatives d\u2019abus ; risque de fraude r\u00e9duit.<\/p>\n \n        <\/div>\n                <div class=\"block-check-list__item\">\n          <h3>Identit\u00e9 de l\u2019exp\u00e9diteur coh\u00e9rente sur tous les canaux d\u2019envoi<\/h3>\n          <p><strong>Contexte<\/strong> : newsletters, e-mails transactionnels, CRM.<\/p>\n<p><strong>M\u00e9canisme<\/strong> : v\u00e9rification de l\u2019alignement entre l\u2019exp\u00e9diteur (From), la signature DKIM et l\u2019envoi depuis des adresses IP autoris\u00e9es.<\/p>\n<p><strong>R\u00e9sultat<\/strong> : garantie d\u2019une configuration correcte sur tous les outils d\u2019envoi.<\/p>\n \n        <\/div>\n                <div class=\"block-check-list__item\">\n          <h3>Meilleure d\u00e9livrabilit\u00e9<\/h3>\n          <p><strong>Contexte<\/strong> : les algorithmes anti-spam privil\u00e9gient les e-mails correctement configur\u00e9s.<\/p>\n<p><strong>M\u00e9canisme<\/strong> : DMARC impose des configurations plus rigoureusement v\u00e9rifi\u00e9es.<\/p>\n<p><strong>R\u00e9sultat<\/strong> : moindre probabilit\u00e9 d\u2019envoyer des messages non autoris\u00e9s et meilleure qualit\u00e9 des envois d\u2019e-mails.<\/p>\n \n        <\/div>\n                <div class=\"block-check-list__item\">\n          <h3>Visibilit\u00e9 am\u00e9lior\u00e9e gr\u00e2ce \u00e0 la d\u00e9finition des politiques et \u00e0 l\u2019analyse des rapports<\/h3>\n          <p><strong>Contexte<\/strong> : la majorit\u00e9 des fournisseurs prennent en charge l\u2019application des politiques et l\u2019envoi des rapports.<\/p>\n<p><strong>M\u00e9canisme<\/strong> : d\u00e9finir les politiques dans le DNS de votre domaine et analyser les rapports re\u00e7us.<\/p>\n<p><strong>R\u00e9sultat<\/strong> : risque de fraude r\u00e9duit et interventions cibl\u00e9es en cas d\u2019anomalies ou d\u2019abus.<\/p>\n \n        <\/div>\n                <\/div>\n<\/div>\n<\/section>\n<section class=\"block-section block-text-box block-bg--secondary\">\n\t<div class=\"block-content \">\n\n\t\t<div class=\"block-text-box__content\">\n\t\t\t\t\t\t\t<h2 class=\"block-title\">Comment d\u00e9finir les politiques de s\u00e9curit\u00e9 de votre domaine<\/h2>\n\t\t\t\n\t\t\t<p>Les services de Qboxmail vous permettent de configurer facilement et de mani\u00e8re guid\u00e9e tous les \u00e9l\u00e9ments n\u00e9cessaires pour s\u00e9curiser vos e-mails, tels qu\u2019une signature DKIM personnalis\u00e9e et la r\u00e9ception des rapports DMARC. Nous transf\u00e9rons \u00e9galement les rapports DMARC \u00e0 vos correspondants, contribuant ainsi \u00e0 renforcer la s\u00e9curit\u00e9 globale et \u00e0 soutenir la lutte contre la fraude. <\/p>\n<p><strong>Politiques DMARC disponibles parmi lesquelles choisir<\/strong><\/p>\n<p>Les politiques DMARC sp\u00e9cifient comment les fournisseurs distants doivent traiter un e-mail envoy\u00e9 avec le domaine de votre entreprise si SPF et\/ou DKIM ne sont pas valides\u202f:<\/p>\n<ul>\n<li><strong>Aucune<\/strong> : aucune action sp\u00e9cifique n\u2019est requise de la part du destinataire, mais les rapports sont tout de m\u00eame re\u00e7us.<\/li>\n<li><strong>Quarantaine<\/strong> : les destinataires sont invit\u00e9s \u00e0 consid\u00e9rer le message comme potentiellement dangereux et \u00e0 le placer en quarantaine.<\/li>\n<li><strong>Rejeter<\/strong> : le serveur du destinataire est instruit de refuser le message, car il n\u2019a pas \u00e9t\u00e9 envoy\u00e9 l\u00e9gitimement par votre entreprise.<\/li>\n<\/ul>\n\n\n\t\t\t<div class=\"block-text-box__wrap-btn\">\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t\t<div class=\"box block-text-box__box\"><p><strong>Utilisations pratiques des politiques DMARC<\/strong><\/p>\n<ul>\n<li><strong>D\u00e9tection des abus et\/ou du phishing <\/strong>: identifier les messages non autoris\u00e9s.<\/li>\n<li><strong>Analyse et r\u00e9solution des probl\u00e8mes <\/strong>: rep\u00e9rer les e-mails l\u00e9gitimes qui \u00e9chouent aux contr\u00f4les SPF\/DKIM en raison de mauvaises configurations.<\/li>\n<li><strong>Suivi de la d\u00e9livrabilit\u00e9<\/strong> : surveiller en continu les messages livr\u00e9s et rejet\u00e9s.<\/li>\n<\/ul>\n<p><strong>Avantages des rapports<\/strong> : les rapports DMARC contiennent tous les d\u00e9tails essentiels sur les messages (IP d\u2019envoi, statut SPF, validation DKIM), offrant une visibilit\u00e9 compl\u00e8te sur les e-mails envoy\u00e9s avec le domaine de votre entreprise et permettant des actions correctives pr\u00e9cises et rapides.<\/p>\n<\/div>\n\t\t\t<\/div>\n<\/section>\n<section class=\"block-section block-cta block-bg--gradient-end cta-free-trial\">\n\t<div class=\"block-content\">\n\t\n\t\t\t\t\t<h2 class=\"cta-title\">Ces mesures de s\u00e9curit\u00e9 sont-elles d\u00e9j\u00e0 actives sur vos e-mails\u202f?<\/h2>\n\t\t\t\t\n\t\t<p dir=\"auto\" data-pm-slice=\"1 1 []\">Qboxmail aide les entreprises et les revendeurs \u00e0 mettre en \u0153uvre correctement les mesures de s\u00e9curit\u00e9 pr\u00e9vues par DMARC pour prot\u00e9ger les e-mails d\u2019entreprise.<\/p>\n\n\t\t\n\t\t<div class=\"block-cta__wrap-btn\">\n\t\t\t\n\t    \t\n\t\t\t\t      \t\t<a class=\"btn-accent\" href=\"https:\/\/www.qboxmail.com\/free-trial\/\">Commencer l&rsquo;essai gratuit<\/a>\n\t    \t\t\t<\/div>\n\n\t<\/div>\n<\/section>\n<section class=\"block-section block-faq block-bg--gradient-section \">\n\t<div class=\"block-content\">\n\t\t\t\t\t<h2 class=\"block-title\">FAQ<\/h2>\n\t\t\t\t\n\t\t\n\t  \t    \t\t    <div class=\"block-faq__box\">\n\t\t    \t<input class=\"block-faq__toggle\" type=\"checkbox\" id=\"check-faq-1\">\n\t        <label class=\"block-faq__question\" for=\"check-faq-1\">\n\t        \tSPF, DKIM et DMARC sont-ils tous n\u00e9cessaires\u202f?\t        <\/label>\n\t        <div class=\"block__text block-faq__answer\"><article class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"request-WEB:54af5a03-0b37-47eb-abc4-901990ce13b9-22\" data-testid=\"conversation-turn-40\" data-scroll-anchor=\"true\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\">\n<div class=\"flex max-w-full flex-col grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+&amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"900478cd-63b8-4817-b3b8-8b4ef1088ce9\" data-message-model-slug=\"gpt-5-mini\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\">\n<div class=\"markdown prose dark:prose-invert w-full break-words dark markdown-new-styling\">\n<p data-start=\"0\" data-end=\"281\" data-is-last-node=\"\" data-is-only-node=\"\">Oui, il est n\u00e9cessaire de configurer correctement les trois protocoles. SPF et DKIM valident et v\u00e9rifient l\u2019authenticit\u00e9 de la source d\u2019envoi. DMARC contr\u00f4le leur application correcte et agit conform\u00e9ment aux politiques de s\u00e9curit\u00e9 d\u00e9finies par votre entreprise lorsqu\u2019une incoh\u00e9rence est d\u00e9tect\u00e9e.  <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n\t\t    <\/div>\n\t    \t\t    <div class=\"block-faq__box\">\n\t\t    \t<input class=\"block-faq__toggle\" type=\"checkbox\" id=\"check-faq-2\">\n\t        <label class=\"block-faq__question\" for=\"check-faq-2\">\n\t        \tLe transfert d\u2019e-mails invalide-t-il le SPF\u202f?\t        <\/label>\n\t        <div class=\"block__text block-faq__answer\"><article class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"request-WEB:54af5a03-0b37-47eb-abc4-901990ce13b9-24\" data-testid=\"conversation-turn-44\" data-scroll-anchor=\"true\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\">\n<div class=\"flex max-w-full flex-col grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+&amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"2a6f7e94-b167-431f-b381-5bac5b409b89\" data-message-model-slug=\"gpt-5-mini\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\">\n<div class=\"markdown prose dark:prose-invert w-full break-words dark markdown-new-styling\">\n<p data-start=\"0\" data-end=\"211\" data-is-last-node=\"\" data-is-only-node=\"\">Oui, le transfert d\u2019e-mails peut invalider le <strong>SPF<\/strong>. Qboxmail utilise la technique SRS (Sender Rewriting Scheme) pour rendre l\u2019exp\u00e9diteur \u00e0 nouveau valide et, si n\u00e9cessaire, re-signe les messages avec <strong>DKIM<\/strong> afin de maintenir la conformit\u00e9 <strong>DMARC<\/strong>. <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n\t\t    <\/div>\n\t    \t\t    <div class=\"block-faq__box\">\n\t\t    \t<input class=\"block-faq__toggle\" type=\"checkbox\" id=\"check-faq-3\">\n\t        <label class=\"block-faq__question\" for=\"check-faq-3\">\n\t        \tCombien de temps faut-il pour passer \u00e0 la politique \u00ab\u202freject\u202f\u00bb\u202f?\t        <\/label>\n\t        <div class=\"block__text block-faq__answer\"><p dir=\"auto\" data-pm-slice=\"1 1 []\">Le d\u00e9lai n\u00e9cessaire pour passer \u00e0 la politique reject d\u00e9pend des sources d\u2019envoi. Gr\u00e2ce aux rapports <strong>DMARC<\/strong>, le processus se fait par \u00e9tapes\u202f: <strong>none<\/strong> \u2192 <strong>quarantine<\/strong> \u2192 <strong>reject<\/strong>, une fois que les flux l\u00e9gitimes sont confirm\u00e9s conformes. <\/p>\n<\/div>\n\t\t    <\/div>\n\t    \t\t    <div class=\"block-faq__box\">\n\t\t    \t<input class=\"block-faq__toggle\" type=\"checkbox\" id=\"check-faq-4\">\n\t        <label class=\"block-faq__question\" for=\"check-faq-4\">\n\t        \tLe DMARC am\u00e9liore-t-il la d\u00e9livrabilit\u00e9 ?\t        <\/label>\n\t        <div class=\"block__text block-faq__answer\"><p dir=\"auto\" data-pm-slice=\"1 1 []\">Oui, le DMARC am\u00e9liore la d\u00e9livrabilit\u00e9 car il renforce la coh\u00e9rence et r\u00e9duit les abus sur le domaine, stabilisant ainsi sa r\u00e9putation au fil du temps.<\/p>\n<\/div>\n\t\t    <\/div>\n\t    \t\t    <div class=\"block-faq__box\">\n\t\t    \t<input class=\"block-faq__toggle\" type=\"checkbox\" id=\"check-faq-5\">\n\t        <label class=\"block-faq__question\" for=\"check-faq-5\">\n\t        \tEst-il n\u00e9cessaire d&rsquo;inclure toutes les plateformes d&rsquo;envoi ?\t        <\/label>\n\t        <div class=\"block__text block-faq__answer\"><p dir=\"auto\" data-pm-slice=\"1 1 []\">Oui, il est n\u00e9cessaire d\u2019inclure toutes les plateformes d\u2019envoi. Les syst\u00e8mes CRM, ERP, marketing et help-desk doivent \u00eatre couverts afin d\u2019\u00e9viter les \u00e9checs et les faux positifs. <\/p>\n<\/div>\n\t\t    <\/div>\n\t    \t  \n\t<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>R\u00e9duisez le spoofing et le phishing, tout en am\u00e9liorant la r\u00e9putation et la d\u00e9livrabilit\u00e9.<\/p>\n","protected":false},"author":14,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-13990","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SPF, DKIM, DMARC - Qboxmail<\/title>\n<meta name=\"description\" content=\"En savoir plus sur SPF, DKIM et DMARC pour prot\u00e9ger votre domaine contre le spoofing et le phishing. 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