{"id":95,"date":"2026-09-13T20:56:40","date_gmt":"2026-09-13T20:56:40","guid":{"rendered":"https:\/\/neranis.com\/?post_type=nrn_service&#038;p=95"},"modified":"2026-09-13T20:56:40","modified_gmt":"2026-09-13T20:56:40","slug":"authentification-spf-dkim-et-dmarc-pour-les-domaines","status":"publish","type":"nrn_service","link":"https:\/\/neranis.com\/fr\/services\/spf-dkim-and-dmarc-domain-authentication\/","title":{"rendered":"Authentification de domaine SPF, DKIM et DMARC"},"content":{"rendered":"<section class=\"wp-block-group nrn2-section nrn2-page-hero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-breadcrumb wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/\">Accueil<\/a> <span aria-hidden=\"true\">\/<\/span> <a href=\"https:\/\/neranis.com\/fr\/expertise\/\">Expertise<\/a> \/ <a href=\"https:\/\/neranis.com\/fr\/expertise\/protection-des-e-mails\/\">Protection contre le courrier ind\u00e9sirable et la fraude<\/a><\/p>\n\n\n<div class=\"wp-block-group nrn2-service-top nrn2-hero-layout-r3 is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-hero-split-copy is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"nrn2-kicker wp-block-paragraph\">MSG \/ MSG-02<\/p>\n\n\n<h1 class=\"wp-block-heading nrn2-title\">Authentification de domaine SPF, DKIM et DMARC<\/h1>\n\n\n<p class=\"nrn2-lead wp-block-paragraph\">Configuration de m\u00e9canismes permettant aux destinataires de v\u00e9rifier l'origine des e-mails et de g\u00e9rer l'utilisation non autoris\u00e9e d'un domaine.<\/p>\n\n<\/div>\n\n\n<figure class=\"wp-block-image size-full nrn2-context-image nrn2-visual-asset-service-family-msg\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"500\" src=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-msg.webp\" alt=\"\" class=\"wp-image-245\" srcset=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-msg.webp 1600w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-msg-300x94.webp 300w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-msg-1024x320.webp 1024w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-msg-768x240.webp 768w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-msg-1536x480.webp 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-top is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-intro is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">QUAND C'EST UTILE<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Une r\u00e9ponse cibl\u00e9e<br>\u00e0 un besoin d\u00e9fini.<\/h2>\n\n\n<p class=\"nrn2-body-lg wp-block-paragraph\">CIO, marketing ou CISO ; spoofing de domaine, probl\u00e8mes de livraison ou nombreux plateformes de messagerie.<\/p>\n\n\n<div class=\"wp-block-buttons nrn2-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/neranis.com\/fr\/contact\/\">Discutez de ce service<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-facts is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">EN UN COUP D'\u0152IL<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Famille<\/strong><br><a href=\"https:\/\/neranis.com\/fr\/expertise\/protection-des-e-mails\/\">Protection contre le courrier ind\u00e9sirable et la fraude<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Engagement<\/strong><br>Mise en \u0153uvre<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>R\u00e9f\u00e9rence<\/strong><br>MSG-02<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section nrn2-canvas is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">PORT\u00c9E ET R\u00c9SULTATS<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Ce que couvre la mission.<\/h2>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-delivery-card is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Port\u00e9e<\/h3>\n\n\n<ul class=\"wp-block-list nrn2-list\">\n<li>Envois d'inventaire<\/li>\n\n\n<li>Aligner SPF\/DKIM<\/li>\n\n\n<li>observer les r\u00e9sultats de DMARC et passer progressivement \u00e0 la politique approuv\u00e9e<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-card is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Livrables<\/h3>\n\n\n<ul class=\"wp-block-list nrn2-list\">\n<li>Stockage de flux de commandes<\/li>\n\n\n<li>R\u00e9pertoires DNS<\/li>\n\n\n<li>Proc\u00e9dures de r\u00e9ception des envois et suivi des rapports<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-card nrn2-evidence is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Preuve de r\u00e9ception<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Les exp\u00e9diteurs l\u00e9gitimes concern\u00e9s sont v\u00e9rifi\u00e9s avant d\u2019appliquer des mesures de r\u00e9pression plus strictes ; les exceptions et les flux non g\u00e9r\u00e9s sont document\u00e9s.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">LIVRAISON<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Comment le travail est structur\u00e9.<\/h2>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-two-col is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-prose is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Approche<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Cartographier les domaines et les exp\u00e9diteurs ; s\u00e9lectionner les contr\u00f4les ; tester en mode pilote\/observation ; activer progressivement ; organiser les exceptions, les alertes et le support.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Pr\u00e9requis et responsabilit\u00e9s<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Client : administrateurs e-mail\/DNS, \u00e9quipes d'envoi et approbation des exp\u00e9diteurs. Fournisseur : configuration et tests. Pour la fraude financi\u00e8re, impliquer les responsables des paiements.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-prose is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Facteurs de port\u00e9e<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Bo\u00eetes aux lettres, domaines, volume, connecteurs, exp\u00e9diteurs tiers et p\u00e9rim\u00e8tre op\u00e9rationnel. Les licences Proofpoint ou autres, le stockage et le service r\u00e9current sont dissoci\u00e9s du projet.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Questions \u00e0 clarifier<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Qui envoie au nom du domaine ? Quels syst\u00e8mes CRM, de facturation et de marketing ? Qui contr\u00f4le le DNS ?<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section nrn2-compact is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-boundaries is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">LIMITES IMPORTANTES<\/p>\n\n\n<p class=\"nrn2-body-lg wp-block-paragraph\">DMARC ne bloque pas toutes les messages frauduleux ou les domaines ressemblant \u00e0 des faux ; il permet de surveiller les exp\u00e9diteurs et ceux qui sont pass\u00e9s sous silence.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Aucune solution ne bloque toutes les tentatives de fraude. Des politiques trop strictes peuvent bloquer des messages l\u00e9gitimes ; les pilotes, les exceptions et les proc\u00e9dures commerciales restent essentiels.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">EN PRATIQUE<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Situations illustratives.<\/h2>\n\n<\/div>\n\n\n<p class=\"nrn2-section-lead wp-block-paragraph\">Ces exemples d\u00e9crivent des engagements possibles et des r\u00e9sultats cibles. Il ne s'agit pas de r\u00e9f\u00e9rences clients ni de r\u00e9sultats obtenus.<\/p>\n\n<\/div>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Sc\u00e9nario 01<\/summary>\n<p class=\"wp-block-paragraph\">Les syst\u00e8mes de messagerie, de marketing et de paie d\u2019une PME utilisent un seul domaine. Probl\u00e8me : g\u00e9rer les stocks et aligner les sources. Objectif : renforcer DMARC sans perturber les relev\u00e9s de paie ou les factures.<\/p>\n\n<\/details>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Sc\u00e9nario 02<\/summary>\n<p class=\"wp-block-paragraph\">Une marque est victime d\u2019une imitation de son nom de domaine exact. Probl\u00e8me : d\u00e9ployer un syst\u00e8me de surveillance et adopter les politiques appropri\u00e9es. Objectif : am\u00e9liorer le contr\u00f4le de l\u2019imitation de noms de domaine directs ; les domaines ressemblant \u00e0 ceux-ci restent un risque distinct.<\/p>\n\n<\/details>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Contexte technologique et de r\u00e9f\u00e9rence<\/summary>\n<p class=\"wp-block-paragraph\">Les outils DNS, SPF, DKIM, DMARC et d\u2019analyse de rapports ; s\u00e9lectionner par volume et exigences.<\/p>\n\n\n<p class=\"wp-block-paragraph\">L'ensemble final des technologies est convenu lors du cadrage, sur la base de l'interop\u00e9rabilit\u00e9, des licences, des droits d'acc\u00e8s et des exigences op\u00e9rationnelles.<\/p>\n\n<\/details>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">SERVICES CONNECT\u00c9S<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Construisez l'\u00e9tape suivante.<\/h2>\n\n<\/div>\n\n\n<p class=\"nrn2-section-lead wp-block-paragraph\">Ces services peuvent compl\u00e9ter la mission. Ils ne sont pas inclus automatiquement.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-related-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">HUM-02<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/phishing-simulations-and-coaching\/\">Simulations de phishing et coaching<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Exercices de hame\u00e7onnage simul\u00e9s contr\u00f4l\u00e9s pour observer les r\u00e9actions, am\u00e9liorer le signalement et cibler la formation sans collecter de v\u00e9ritables identifiants.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/phishing-simulations-and-coaching\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">DAT-02<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/detection-et-prevention-des-pertes-de-donnees-multicanal-dlp\/\">Pr\u00e9vention des pertes de donn\u00e9es multicanal - DLP<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">D\u00e9tecter et r\u00e9gir les transferts de donn\u00e9es sensibles via certains canaux : e-mail, services cloud, terminaux ou supports amovibles. La DLP associe classification, politiques, exceptions et examen humain des \u00e9v\u00e9nements.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/detection-et-prevention-des-pertes-de-donnees-multicanal-dlp\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">SOC-01<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/surveillance-soc-geree-triage-et-escalade\/\">SOC manag\u00e9 \u2014 surveillance, triage et escalade<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Confiez la surveillance de sources convenues, l'analyse des alertes et l'escalade des incidents \u00e0 une \u00e9quipe sp\u00e9cialis\u00e9e. Un SOC associe des personnes, des processus et des outils ; son niveau de service d\u00e9pend du p\u00e9rim\u00e8tre et du contrat.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/surveillance-soc-geree-triage-et-escalade\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-cta is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">Commencer une conversation<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Clarifiez la port\u00e9e.<\/h2>\n\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-body-lg wp-block-paragraph\">Nous clarifierons l'objectif, les d\u00e9pendances et les responsabilit\u00e9s de ce service avant de proposer la livraison.<\/p>\n\n\n<div class=\"wp-block-buttons nrn2-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/neranis.com\/fr\/contact\/\">Discutez de vos priorit\u00e9s<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Configuration de m\u00e9canismes permettant aux destinataires de v\u00e9rifier l'origine des e-mails et de g\u00e9rer l'utilisation non autoris\u00e9e d'un domaine.<\/p>","protected":false},"featured_media":0,"template":"single-nrn_service","meta":{"footnotes":""},"nrn_family":[9],"class_list":["post-95","nrn_service","type-nrn_service","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/95","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service"}],"about":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/types\/nrn_service"}],"version-history":[{"count":2,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/95\/revisions"}],"predecessor-version":[{"id":490,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/95\/revisions\/490"}],"wp:attachment":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/media?parent=95"}],"wp:term":[{"taxonomy":"nrn_family","embeddable":true,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_family?post=95"}],"curies":[{"name":"Bien jou\u00e9","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}