{"id":5284,"date":"2025-12-19T17:38:31","date_gmt":"2025-12-19T17:38:31","guid":{"rendered":"https:\/\/mgcomdev.wpenginepowered.com\/glossary\/mise-liste-grise\/"},"modified":"2026-09-08T23:09:46","modified_gmt":"2026-09-08T23:09:46","slug":"greylisting","status":"publish","type":"glossary","link":"https:\/\/www.mailgun.com\/fr\/glossaire\/greylisting\/","title":{"rendered":"Greylisting"},"content":{"rendered":"<h1>Greylisting<\/h1>\n<p><span data-contrast=\"none\">Le g<\/span><span data-contrast=\"none\">reylisting d&#8217;emails est une technique de filtrage du spam utilis\u00e9e par certains serveurs de messagerie destinataires. Lorsqu&rsquo;un email est re\u00e7u d&rsquo;un exp\u00e9diteur inconnu (c.-\u00e0-d. une nouvelle combinaison IP\/domaine), le serveur le rejette temporairement avec une erreur 4xx, <\/span><span data-contrast=\"none\">indiquant<\/span><span data-contrast=\"none\"> \u00e0 l&rsquo;exp\u00e9diteur <\/span><span data-contrast=\"none\">de r\u00e9essayer plus t<\/span><span data-contrast=\"none\">ard.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Les exp\u00e9diteurs l\u00e9gitimes retenteront la livraison apr\u00e8s un court d\u00e9lai, moment auquel le serveur de r\u00e9ception <\/span><span data-contrast=\"none\">laissera<\/span><span data-contrast=\"none\"> passer le message. De nombreux spammeurs et bots de faible qualit\u00e9 <\/span><span data-contrast=\"none\">ne r\u00e9essaient pas<\/span><span data-contrast=\"none\">, le <\/span><span data-contrast=\"none\">greylisting<\/span><span data-contrast=\"none\"> agit donc comme un filtre passif contre le spam basique.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><strong>Points cl\u00e9s\u00a0:\u00a0<\/strong><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"43\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Le greylisting<\/span><span data-contrast=\"none\"> est utilis\u00e9 par les destinataires, et non par les exp\u00e9diteurs.\u00a0<\/span><span data-contrast=\"none\">Il s&rsquo;agit<\/span><span data-contrast=\"none\"> d&rsquo;un m\u00e9canisme de filtrage, et non d&rsquo;une fonctionnalit\u00e9 que la client\u00e8le de <\/span><span data-contrast=\"none\">Mailgun<\/span><span data-contrast=\"none\"> peut appliquer.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"43\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Il peut entra\u00eener de l\u00e9gers retards de livraison lors des premiers <\/span><span data-contrast=\"none\">envois<\/span><span data-contrast=\"none\"> depuis une nouvelle IP ou un nouveau domaine.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"43\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Une f<\/span><span data-contrast=\"none\">ois qu&rsquo;un exp\u00e9diteur est \u00ab\u00a0connu\u00a0\u00bb, les futurs messages contournent g\u00e9n\u00e9ralement ce d\u00e9lai.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"43\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Mailgun<\/span><span data-contrast=\"none\"> retente automatiquement l&rsquo;envoi des messages diff\u00e9r\u00e9s dans le cadre de son processus de livraison standard, de sorte que la plupart des clients et clientes <\/span><span data-contrast=\"none\">n&rsquo;ont<\/span><span data-contrast=\"none\"> aucune action \u00e0 entreprendre.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Greylisting Le greylisting d&#8217;emails est une technique de filtrage du spam utilis\u00e9e par certains serveurs de messagerie destinataires. Lorsqu&rsquo;un email est re\u00e7u d&rsquo;un exp\u00e9diteur inconnu (c.-\u00e0-d. une nouvelle combinaison IP\/domaine), le serveur le rejette temporairement avec une erreur 4xx, indiquant \u00e0 l&rsquo;exp\u00e9diteur de r\u00e9essayer plus tard.\u00a0 Les exp\u00e9diteurs l\u00e9gitimes retenteront la livraison apr\u00e8s un court [&hellip;]<\/p>\n","protected":false},"author":1,"template":"","meta":{"_acf_changed":false},"class_list":["post-5284","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Greylisting \u2013 Glossaire des termes d&#039;email | Mailgun<\/title>\n<meta name=\"description\" content=\"Le greylisting est une m\u00e9thode de filtrage d&#039;emails qui r\u00e9duit le spam. 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