{"id":7656,"date":"2026-10-18T11:57:48","date_gmt":"2026-10-18T09:57:48","guid":{"rendered":"https:\/\/eu.it-cyberwall.com\/guides\/spf-dkim-e-dmarc-proteggere-la-posta-elettronica-di-una-pmi\/"},"modified":"2026-10-18T20:22:47","modified_gmt":"2026-10-18T18:22:47","slug":"spf-dkim-dmarc","status":"publish","type":"page","link":"https:\/\/eu.it-cyberwall.com\/it\/guides\/spf-dkim-dmarc\/","title":{"rendered":"SPF, DKIM e DMARC: proteggere la posta elettronica di una PMI"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7656\" class=\"elementor elementor-7656 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\">Guida<\/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 e DMARC: proteggere la posta elettronica di una PMI<\/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 e DMARC impediscono che vengano inviate false e-mail a Suo nome e aiutano i Suoi veri messaggi ad arrivare. Google, Yahoo e Microsoft li esigono gi\u00e0 dai grandi mittenti. Ecco cosa fanno, in parole semplici, e come attivarli senza bloccare le Sue stesse fatture.<\/p><p class=\"note\" style=\"text-align:center\">Aggiornato il 18 ottobre 2026 \u00b7 Le cifre hanno la loro fonte in fondo alla pagina; le valutazioni sono quelle di 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>In questa guida:<\/strong><br \/><a href=\"#pourquoi\">Perch\u00e9 La riguarda<\/a> \u00b7 <a href=\"#trois\">SPF, DKIM e DMARC in parole semplici<\/a> \u00b7 <a href=\"#exigences\">Cosa esigono Google, Yahoo e Microsoft<\/a> \u00b7 <a href=\"#etapes\">L\u2019attivazione, passo dopo passo<\/a> \u00b7 <a href=\"#it-cyberwall\">Cosa fa IT CyberWall<\/a> \u00b7 <a href=\"#sources\">Fonti<\/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\">Perch\u00e9 La riguarda<\/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>Chiunque pu\u00f2 inviare un\u2019e-mail che sembra provenire dal Suo dominio: una falsa fattura ai Suoi clienti, un falso ordine di bonifico al Suo contabile. Tre impostazioni, pubblicate nel DNS del Suo nome di dominio, permettono ai servizi di posta dei Suoi destinatari di riconoscere i Suoi veri messaggi. Proteggono la Sua posta elettronica e la Sua reputazione, non i Suoi dati: non sono un backup.<\/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 e DMARC in parole semplici<\/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>Impostazione<\/th><th>Cosa dice<\/th><th>Immagine<\/th><\/tr><\/thead><tbody><tr><td><strong>SPF<\/strong><\/td><td>L\u2019elenco dei server autorizzati a inviare messaggi a nome del Suo dominio<sup><a href=\"#source-1\">[1]<\/a><\/sup>.<\/td><td>L\u2019elenco dei postini autorizzati.<\/td><\/tr><tr><td><strong>DKIM<\/strong><\/td><td>Una firma digitale aggiunta a ogni messaggio, che collega il messaggio al Suo dominio<sup><a href=\"#source-2\">[2]<\/a><\/sup>.<\/td><td>Il timbro dell\u2019azienda sulla busta.<\/td><\/tr><tr><td><strong>DMARC<\/strong><\/td><td>La Sua istruzione ai destinatari quando un messaggio non supera i controlli (non fare nulla, spostarlo nella posta indesiderata, rifiutarlo) e l\u2019invio di report<sup><a href=\"#source-3\">[3]<\/a><\/sup>.<\/td><td>L\u2019istruzione lasciata alla reception.<\/td><\/tr><\/tbody><\/table><p>L\u2019ANSSI dedica a questi tre meccanismi una parte delle sue raccomandazioni sull\u2019interconnessione di un sistema informativo a 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\">Cosa esigono Google, Yahoo e Microsoft<\/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>, dal 1\u00b0 febbraio 2024: SPF o DKIM per tutti i mittenti; SPF, DKIM e DMARC per chi invia pi\u00f9 di 5 000 messaggi al giorno verso Gmail<sup><a href=\"#source-5\">[5]<\/a><\/sup>.<\/li><li><strong>Yahoo<\/strong>: SPF o DKIM per tutti; SPF, DKIM e DMARC per gli invii massivi<sup><a href=\"#source-6\">[6]<\/a><\/sup>.<\/li><li><strong>Microsoft Outlook.com<\/strong>, dal 5 maggio 2025: SPF, DKIM e DMARC per i domini che inviano pi\u00f9 di 5 000 messaggi al giorno; in caso contrario, i messaggi finiscono nella posta indesiderata, poi vengono rifiutati<sup><a href=\"#source-7\">[7]<\/a><\/sup>.<\/li><\/ul><p>Anche una PMI che invia pochi messaggi ha interesse a pubblicarli tutti e tre: le sue fatture e i suoi preventivi arrivano meglio, e il suo nome \u00e8 pi\u00f9 difficile da usurpare.<\/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\">L\u2019attivazione, passo dopo passo<\/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>Censire tutto ci\u00f2 che invia messaggi a Suo nome<\/strong>: posta elettronica, software di fatturazione, CRM, sito web, strumento di e-mailing, stampante che invia scansioni.<\/li><li><strong>Pubblicare un SPF<\/strong> che elenchi questi mittenti, senza dimenticarne nessuno.<\/li><li><strong>Attivare DKIM<\/strong> per ogni servizio che lo consente.<\/li><li><strong>Pubblicare un DMARC in osservazione<\/strong> (policy \u00ab none \u00bb) e ricevere i report.<\/li><li><strong>Leggere i report<\/strong> per alcune settimane: rivelano i mittenti dimenticati e le usurpazioni.<\/li><li><strong>Inasprire gradualmente<\/strong>: spostamento nella posta indesiderata (\u00ab quarantine \u00bb), poi rifiuto (\u00ab reject \u00bb), che Microsoft raccomanda<sup><a href=\"#source-7\">[7]<\/a><\/sup>.<\/li><\/ol><div class=\"box\"><strong>La trappola.<\/strong> Passare direttamente al rifiuto senza aver censito i Suoi mittenti blocca le Sue stesse fatture. La fase di osservazione non \u00e8 facoltativa.<\/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\">Cosa fa IT CyberWall<\/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>Facciamo l\u2019inventario dei Suoi mittenti, pubblichiamo e testiamo i record SPF, DKIM e DMARC, leggiamo i report con Lei e inaspriamo la policy quando non comporta rischi. \u00c8 un intervento breve, che si integra nei nostri servizi di <a href=\"https:\/\/eu.it-cyberwall.com\/it\/cybersecurite\/\">cybersicurezza<\/a>.<\/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\">Le Sue e-mail finiscono nella posta indesiderata, o il Suo nome viene usurpato?<\/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>Verifichiamo i Suoi record e attiviamo SPF, DKIM e DMARC.<\/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\/it\/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\">Descrivere la mia esigenza<\/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\/it\/guides\/\">\u2190 Tutte le nostre guide<\/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\">Fonti<\/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\">Fonti consultate il 18 ottobre 2026. Le tariffe dei fornitori sono indicate IVA esclusa, nella valuta e nella regione del listino pubblicato, e possono cambiare: verifichi sempre la pagina ufficiale prima di decidere.<\/p><ol class=\"src\"><li id=\"source-1\">IETF \u2013 RFC 7208, Sender Policy Framework (SPF), aprile 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, settembre 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 (maggio 2026, sostituisce la 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 giugno 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":7553,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"SPF, DKIM e DMARC per una PMI | IT CyberWall","_seopress_titles_desc":"SPF, DKIM e DMARC spiegati in modo semplice, i requisiti di Google, Yahoo e Microsoft e la configurazione per proteggere la posta di una PMI 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dkim dmarc,configurare dmarc,sicurezza email aziendale europa,spoofing 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