{"id":7485,"date":"2026-10-18T11:57:48","date_gmt":"2026-10-18T09:57:48","guid":{"rendered":"https:\/\/eu.it-cyberwall.com\/guides\/spf-dkim-und-dmarc-die-e-mail-eines-kmu-schutzen\/"},"modified":"2026-10-18T20:20:13","modified_gmt":"2026-10-18T18:20:13","slug":"spf-dkim-dmarc","status":"publish","type":"page","link":"https:\/\/eu.it-cyberwall.com\/de\/guides\/spf-dkim-dmarc\/","title":{"rendered":"SPF, DKIM und DMARC: die E-Mail eines KMU sch\u00fctzen"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7485\" class=\"elementor elementor-7485 elementor-6679\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-36a12c3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"36a12c3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a39c058\" data-id=\"a39c058\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3c2a2db elementor-widget elementor-widget-html\" data-id=\"3c2a2db\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>.itcw-g{max-width:900px;margin:0 auto;font-size:17px;line-height:1.65;color:#2b2f3a}.itcw-g h2{margin-top:10px}.itcw-g .tw{overflow-x:auto;margin:18px 0}.itcw-g table{width:100%;border-collapse:collapse;font-size:15px;min-width:640px}.itcw-g th,.itcw-g td{border:1px solid #e3e6ee;padding:10px 12px;vertical-align:top;text-align:left}.itcw-g thead th{background:#0E0129;color:#fff}.itcw-g tbody th{background:#F6F7FA;font-weight:600}.itcw-g .box{background:#F6F7FA;border-left:4px solid #DE3241;padding:16px 20px;border-radius:6px;margin:18px 0}.itcw-g .box.ok{border-left-color:#2C9703}.itcw-g sup a{text-decoration:none;font-weight:600}.itcw-g ol.src li{margin-bottom:8px;font-size:15px;word-break:break-word}.itcw-g .note{font-size:14px;color:#6b7080}.itcw-g .toc a{display:inline-block;margin:4px 10px 4px 0}<\/style>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f9122d elementor-widget elementor-widget-heading\" data-id=\"4f9122d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">Leitfaden<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9972963 elementor-widget elementor-widget-heading\" data-id=\"9972963\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">SPF, DKIM und DMARC: die E-Mail eines KMU sch\u00fctzen<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2026230 elementor-widget elementor-widget-text-editor\" data-id=\"2026230\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><p style=\"text-align:center\">SPF, DKIM und DMARC verhindern, dass in Ihrem Namen gef\u00e4lschte E-Mails versendet werden, und helfen Ihren echten Nachrichten, anzukommen. Google, Yahoo und Microsoft verlangen sie bereits von gro\u00dfen Absendern. Hier erfahren Sie verst\u00e4ndlich, was sie tun und wie Sie sie einrichten, ohne Ihre eigenen Rechnungen zu blockieren.<\/p><p class=\"note\" style=\"text-align:center\">Aktualisiert am 18. Oktober 2026 \u00b7 Die Zahlen sind unten auf der Seite belegt; die Bewertungen stammen von IT CyberWall.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-16c50dd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"16c50dd\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7b83a94\" data-id=\"7b83a94\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-731364b elementor-widget elementor-widget-text-editor\" data-id=\"731364b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><div class=\"box toc\"><strong>Inhalt:<\/strong><br \/><a href=\"#pourquoi\">Warum Sie das betrifft<\/a> \u00b7 <a href=\"#trois\">SPF, DKIM und DMARC verst\u00e4ndlich erkl\u00e4rt<\/a> \u00b7 <a href=\"#exigences\">Was Google, Yahoo und Microsoft verlangen<\/a> \u00b7 <a href=\"#etapes\">Die Einrichtung Schritt f\u00fcr Schritt<\/a> \u00b7 <a href=\"#it-cyberwall\">Was IT CyberWall \u00fcbernimmt<\/a> \u00b7 <a href=\"#sources\">Quellen<\/a><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2124b50 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2124b50\" data-element_type=\"section\" data-e-type=\"section\" id=\"pourquoi\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f7bf464\" data-id=\"f7bf464\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bcf5c8e elementor-widget elementor-widget-heading\" data-id=\"bcf5c8e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Warum Sie das betrifft<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9865c6 elementor-widget elementor-widget-text-editor\" data-id=\"b9865c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><p>Jeder kann eine E-Mail senden, die scheinbar von Ihrer Domain stammt: eine gef\u00e4lschte Rechnung an Ihre Kunden, einen gef\u00e4lschten \u00dcberweisungsauftrag an Ihre Buchhaltung. Drei Einstellungen, ver\u00f6ffentlicht im DNS Ihres Domainnamens, erm\u00f6glichen es den E-Mail-Systemen Ihrer Empf\u00e4nger, Ihre echten Nachrichten zu erkennen. Sie sch\u00fctzen Ihre E-Mail und Ihren Ruf, nicht Ihre Daten: Sie sind keine Datensicherung.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7688241 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7688241\" data-element_type=\"section\" data-e-type=\"section\" id=\"trois\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5e862c2\" data-id=\"5e862c2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-605ce07 elementor-widget elementor-widget-heading\" data-id=\"605ce07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SPF, DKIM und DMARC verst\u00e4ndlich erkl\u00e4rt<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0210b77 elementor-widget elementor-widget-text-editor\" data-id=\"0210b77\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><table><thead><tr><th>Einstellung<\/th><th>Was sie aussagt<\/th><th>Bild<\/th><\/tr><\/thead><tbody><tr><td><strong>SPF<\/strong><\/td><td>Die Liste der Server, die im Namen Ihrer Domain Nachrichten senden d\u00fcrfen<sup><a href=\"#source-1\">[1]<\/a><\/sup>.<\/td><td>Die Liste der zugelassenen Brieftr\u00e4ger.<\/td><\/tr><tr><td><strong>DKIM<\/strong><\/td><td>Eine digitale Signatur an jeder Nachricht, die die Nachricht mit Ihrer Domain verkn\u00fcpft<sup><a href=\"#source-2\">[2]<\/a><\/sup>.<\/td><td>Der Firmenstempel auf dem Umschlag.<\/td><\/tr><tr><td><strong>DMARC<\/strong><\/td><td>Ihre Anweisung an die Empf\u00e4nger, wenn eine Nachricht die Pr\u00fcfungen nicht besteht (nichts tun, in den Spam verschieben, ablehnen), und der Versand von Berichten<sup><a href=\"#source-3\">[3]<\/a><\/sup>.<\/td><td>Die Anweisung am Empfang.<\/td><\/tr><\/tbody><\/table><p>Die ANSSI widmet diesen drei Mechanismen einen Teil ihrer Empfehlungen zur Anbindung eines Informationssystems an das Internet<sup><a href=\"#source-4\">[4]<\/a><\/sup>.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-172d405 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"172d405\" data-element_type=\"section\" data-e-type=\"section\" id=\"exigences\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8ec4a9f\" data-id=\"8ec4a9f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-eeb7820 elementor-widget elementor-widget-heading\" data-id=\"eeb7820\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Was Google, Yahoo und Microsoft verlangen<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a305bee elementor-widget elementor-widget-text-editor\" data-id=\"a305bee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><ul><li><strong>Google<\/strong>, seit dem 1. Februar 2024: SPF oder DKIM f\u00fcr alle Absender; SPF, DKIM und DMARC f\u00fcr diejenigen, die mehr als 5 000 Nachrichten pro Tag an Gmail senden<sup><a href=\"#source-5\">[5]<\/a><\/sup>.<\/li><li><strong>Yahoo<\/strong>: SPF oder DKIM f\u00fcr alle; SPF, DKIM und DMARC f\u00fcr Massenversand<sup><a href=\"#source-6\">[6]<\/a><\/sup>.<\/li><li><strong>Microsoft Outlook.com<\/strong>, seit dem 5. Mai 2025: SPF, DKIM und DMARC f\u00fcr Domains, die mehr als 5 000 Nachrichten pro Tag senden; andernfalls landen die Nachrichten im Spam und werden dann abgelehnt<sup><a href=\"#source-7\">[7]<\/a><\/sup>.<\/li><\/ul><p>Auch ein KMU, das wenige Nachrichten versendet, sollte alle drei ver\u00f6ffentlichen: Seine Rechnungen und Angebote kommen besser an, und sein Name ist schwerer zu missbrauchen.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b5d71c9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b5d71c9\" data-element_type=\"section\" data-e-type=\"section\" id=\"etapes\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4f5562a\" data-id=\"4f5562a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-572b83d elementor-widget elementor-widget-heading\" data-id=\"572b83d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Die Einrichtung Schritt f\u00fcr Schritt<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a32de41 elementor-widget elementor-widget-text-editor\" data-id=\"a32de41\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><ol><li><strong>Alles erfassen, was in Ihrem Namen Nachrichten versendet<\/strong>: E-Mail, Rechnungssoftware, CRM, Website, E-Mailing-Tool, Drucker, der Scans verschickt.<\/li><li><strong>Einen SPF-Eintrag ver\u00f6ffentlichen<\/strong>, der diese Absender auflistet, ohne einen zu vergessen.<\/li><li><strong>DKIM aktivieren<\/strong> f\u00fcr jeden Dienst, der es erm\u00f6glicht.<\/li><li><strong>Einen DMARC-Eintrag im Beobachtungsmodus ver\u00f6ffentlichen<\/strong> (Richtlinie \u201enone\u201c) und die Berichte empfangen.<\/li><li><strong>Die Berichte einige Wochen lang lesen<\/strong>: Sie zeigen vergessene Absender und Missbrauchsversuche.<\/li><li><strong>Schrittweise versch\u00e4rfen<\/strong>: Verschieben in den Spam (\u201equarantine\u201c), dann Ablehnung (\u201ereject\u201c), die Microsoft empfiehlt<sup><a href=\"#source-7\">[7]<\/a><\/sup>.<\/li><\/ol><div class=\"box\"><strong>Die Falle.<\/strong> Wer direkt auf Ablehnung umstellt, ohne seine Absender erfasst zu haben, blockiert seine eigenen Rechnungen. Die Beobachtungsphase ist nicht optional.<\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b863dc0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b863dc0\" data-element_type=\"section\" data-e-type=\"section\" id=\"it-cyberwall\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-54437ee\" data-id=\"54437ee\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5a17ad7 elementor-widget elementor-widget-heading\" data-id=\"5a17ad7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Was IT CyberWall \u00fcbernimmt<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b2a2f2 elementor-widget elementor-widget-text-editor\" data-id=\"9b2a2f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><p>Wir erfassen Ihre Absender, ver\u00f6ffentlichen und testen die SPF-, DKIM- und DMARC-Eintr\u00e4ge, lesen die Berichte mit Ihnen und versch\u00e4rfen die Richtlinie, sobald dies ohne Risiko m\u00f6glich ist. Das ist ein kurzer Einsatz, der sich in unsere Leistungen zur <a href=\"https:\/\/eu.it-cyberwall.com\/de\/cybersecurite\/\">Cybersicherheit<\/a> einf\u00fcgt.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5735d54 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5735d54\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f5cc4d7\" data-id=\"f5cc4d7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-06b9d29 elementor-widget elementor-widget-heading\" data-id=\"06b9d29\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Ihre E-Mails landen im Spam, oder Ihr Name wird missbraucht?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0aefcda elementor-widget elementor-widget-text-editor\" data-id=\"0aefcda\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Wir pr\u00fcfen Ihre Eintr\u00e4ge und richten SPF, DKIM und DMARC ein.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7bba935 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"7bba935\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"https:\/\/eu.it-cyberwall.com\/de\/contact\/?mf-besoin=cybersecurite#formulaire\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-right\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M190.5 66.9l22.2-22.2c9.4-9.4 24.6-9.4 33.9 0L441 239c9.4 9.4 9.4 24.6 0 33.9L246.6 467.3c-9.4 9.4-24.6 9.4-33.9 0l-22.2-22.2c-9.5-9.5-9.3-25 .4-34.3L311.4 296H24c-13.3 0-24-10.7-24-24v-32c0-13.3 10.7-24 24-24h287.4L190.9 101.2c-9.8-9.3-10-24.8-.4-34.3z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Bedarf beschreiben<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-82059e2 elementor-widget elementor-widget-text-editor\" data-id=\"82059e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/eu.it-cyberwall.com\/de\/guides\/\">\u2190 Alle unsere Leitf\u00e4den<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-12a1db7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"12a1db7\" data-element_type=\"section\" data-e-type=\"section\" id=\"sources\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e58afdb\" data-id=\"e58afdb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1eeb08b elementor-widget elementor-widget-heading\" data-id=\"1eeb08b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Quellen<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7caf600 elementor-widget elementor-widget-text-editor\" data-id=\"7caf600\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"itcw-g\"><p class=\"note\">Quellen abgerufen am 18. Oktober 2026. Die Preise der Anbieter sind ohne Steuern angegeben, in der W\u00e4hrung und Region der ver\u00f6ffentlichten Preisliste, und k\u00f6nnen sich \u00e4ndern: Pr\u00fcfen Sie vor einer Entscheidung immer die offizielle Seite.<\/p><ol class=\"src\"><li id=\"source-1\">IETF \u2013 RFC 7208, Sender Policy Framework (SPF), April 2014 \u2014 <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc7208\" target=\"_blank\" rel=\"noopener\">www.rfc-editor.org\/rfc\/rfc7208<\/a><\/li><li id=\"source-2\">IETF \u2013 RFC 6376, DomainKeys Identified Mail (DKIM) Signatures, September 2011 \u2014 <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc6376\" target=\"_blank\" rel=\"noopener\">www.rfc-editor.org\/rfc\/rfc6376<\/a><\/li><li id=\"source-3\">IETF \u2013 RFC 9989, DMARC (Mai 2026, ersetzt RFC 7489) \u2014 <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc9989\" target=\"_blank\" rel=\"noopener\">www.rfc-editor.org\/rfc\/rfc9989<\/a><\/li><li id=\"source-4\">ANSSI \u2013 Recommandations relatives \u00e0 l\u2019interconnexion d\u2019un syst\u00e8me d\u2019information \u00e0 internet, v3.0 (19. Juni 2020), \u00a7 5.4 \u2014 <a href=\"https:\/\/messervices.cyber.gouv.fr\/guides\/recommandations-relatives-linterconnexion-dun-si-internet\" target=\"_blank\" rel=\"noopener\">messervices.cyber.gouv.fr\/guides\/recommandations-relatives-linterconnexion-dun-si-internet<\/a><\/li><li id=\"source-5\">Google \u2013 Consignes pour les exp\u00e9diteurs de messages \u2014 <a href=\"https:\/\/support.google.com\/a\/answer\/81126?hl=fr\" target=\"_blank\" rel=\"noopener\">support.google.com\/a\/answer\/81126?hl=fr<\/a><\/li><li id=\"source-6\">Yahoo \u2013 Sender Best Practices \u2014 <a href=\"https:\/\/senders.yahooinc.com\/best-practices\/\" target=\"_blank\" rel=\"noopener\">senders.yahooinc.com\/best-practices\/<\/a><\/li><li id=\"source-7\">Microsoft \u2013 Outlook.com Policies, Practices, and Guidelines \u2014 <a href=\"https:\/\/substrate.office.com\/ip-domain-management-snds\/Postmaster\/Policies\" target=\"_blank\" rel=\"noopener\">substrate.office.com\/ip-domain-management-snds\/Postmaster\/Policies<\/a><\/li><\/ol><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":7382,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"SPF, DKIM und DMARC f\u00fcr KMU in Europa | IT CyberWall","_seopress_titles_desc":"SPF, DKIM und DMARC einfach erkl\u00e4rt, die Vorgaben von Google, Yahoo und Microsoft und die Einrichtung Schritt f\u00fcr Schritt f\u00fcr KMU in Europa.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"spf dkim dmarc,dmarc einrichten,e-mail-sicherheit unternehmen europa,e-mail spoofing","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"class_list":["post-7485","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/pages\/7485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/comments?post=7485"}],"version-history":[{"count":1,"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/pages\/7485\/revisions"}],"predecessor-version":[{"id":7486,"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/pages\/7485\/revisions\/7486"}],"up":[{"embeddable":true,"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/pages\/7382"}],"wp:attachment":[{"href":"https:\/\/eu.it-cyberwall.com\/de\/wp-json\/wp\/v2\/media?parent=7485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}