{"id":33320,"date":"2022-03-01T15:35:11","date_gmt":"2022-03-01T15:35:11","guid":{"rendered":"https:\/\/www.retarus.com\/blog\/comprehensive-email-authentication-from-dmarc-to-business-email-compromise\/"},"modified":"2026-08-06T14:49:10","modified_gmt":"2026-08-06T14:49:10","slug":"comprehensive-email-authentication-from-dmarc-to-business-email-compromise","status":"publish","type":"post","link":"https:\/\/www.retarus.com\/blog\/it\/comprehensive-email-authentication-from-dmarc-to-business-email-compromise\/","title":{"rendered":"Autenticazione e-mail completa: da DMARC alla compromissione della posta elettronica aziendale"},"content":{"rendered":" <p class=\"wp-block-paragraph\">Per i destinatari di messaggi e-mail \u00e8 spesso difficile riconoscere se questi messaggi provengono veramente dal mittente indicato. E risulta ancora pi\u00f9 difficile verificare se essi non hanno subito modifiche durante la trasmissione. Gli standard <a href=\"https:\/\/it.wikipedia.org\/wiki\/Sender_Policy_Framework\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>SPF (Sender Policy Framework)<\/strong><\/a> e <a href=\"https:\/\/en.wikipedia.org\/wiki\/DomainKeys\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>DKIM (DomainKeys Identified Mail)<\/strong><\/a> affrontano da tempo questo problema.<\/p>   <p class=\"wp-block-paragraph\">Tuttavia, ci\u00f2 che alla fine integra e completa entrambe le procedure \u00e8 l\u2019applicazione del sistema <strong>DMARC (Domain-based Message Authentication, Reporting and Conformance)<\/strong>. Anche questa specifica mira a proteggere meglio i mittenti e i destinatari di messaggi e-mail da recapiti falsificati. In un certo senso, DMARC \u00e8 l\u2019anello di congiunzione con SPF e DKIM. \u00c8 stato sviluppato su iniziativa di giganti del settore come Google, Yahoo, Microsoft, Facebook, AOL, PayPal e LinkedIn. Con la crescente accettazione e diffusione tra i suoi clienti aziendali, Retarus implementer\u00e0 di conseguenza lo standard anche in futuro come parte dei suoi <a href=\"https:\/\/www.retarus.com\/it\/services\/email-security\/\" target=\"_blank\" rel=\"noreferrer noopener\">Email Security Services<\/a>. Di seguito, spieghiamo brevemente perch\u00e9 pu\u00f2 avere senso per una azienda usare tutti e tre gli standard in egual misura.<\/p>   <h2 class=\"wp-block-heading\" id=\"h-dmarc-rundet-spf-und-dkim-ab\">DMARC completa le tecnologie SPF e DKIM<\/h2>   <p class=\"wp-block-paragraph\">La specifica DMARC \u00e8 stata sviluppata per arginare i fenomeni di falsificazione di mittenti o domini, principalmente il cosiddetto <a href=\"https:\/\/it.wikipedia.org\/wiki\/Email_spoofing\" target=\"_blank\" rel=\"noreferrer noopener\">spoofing<\/a>. Tecnicamente, il sistema DMARC complementa le tecnologie SPF e DKIM e, in una certa misura, cerca di rimediare alle relative \u201ccarenze\u201d. Mentre SPF determina chi pu\u00f2 inviare un messaggio e-mail a nome del proprio dominio, DKIM assicura che questo messaggio sia stato originato veramente dal mittente e sia rimasto inalterato. Grazie a DMARC, il titolare del dominio pu\u00f2 ora verificare anche &#8211; per ogni dominio mittente &#8211; in che modo il sistema di posta elettronica del destinatario elabori i risultati dopo l\u2019autenticazione. E, ancora pi\u00f9 importante, pu\u00f2 stabilire in che maniera procedere in caso di errore.<\/p>   <h2 class=\"wp-block-heading\" id=\"missbrauch-automatisiert-an-domain-inhaber-melden\">Segnalazione automatica di abusi al titolare del dominio<\/h2>   <p class=\"wp-block-paragraph\">Ad esempio, dopo l&#8217;autentificazione i messaggi e-mail possono essere automaticamente rifiutati o messi in quarantena. Inoltre, il destinatario pu\u00f2 avvisare il proprietario in merito al sospetto abuso del suo dominio e ai problemi di autenticazione. Questo aspetto in particolare pu\u00f2 motivare il mittente a utilizzare DMARC per identificare tempestivamente gli attacchi perpetrati tramite il suo nome. Le linee guida di DMARC possono essere memorizzate per ogni dominio nella corrispondente voce del&nbsp;<a href=\"https:\/\/it.wikipedia.org\/wiki\/Domain_Name_System\" target=\"_blank\" rel=\"noreferrer noopener\">Domain Name System<\/a>&nbsp;(DNS), affinch\u00e9 chiunque possa vederle senza difficolt\u00e0. Retarus convalider\u00e0 queste informazioni anche in futuro (se richiesto e configurato dal cliente) e garantir\u00e0 cos\u00ec una verifica costante dell\u2019autenticit\u00e0 dei messaggi e-mail.<\/p>   <h2 class=\"wp-block-heading\" id=\"erganzung-durch-advanced-threat-protection-sinnvoll\">Si raccomanda l&#8217;uso aggiuntivo di Advanced Threat Protection<\/h2>   <p class=\"wp-block-paragraph\">Tuttavia, resta un problema. Infatti, ogni titolare di dominio pu\u00f2 definire voci DMARC. Non ha luogo alcun controllo indipendente che verifichi se il sito Web viene utilizzato legittimamente o se \u00e8 attendibile. Resta quindi possibile che un messaggio e-mail venga inviato da un dominio ingannevole simile (la cosiddetta domain similarity, che avviene ad esempio scambiando singole lettere o usando altri set di caratteri) e persino mostra una voce SPF e DKIM corretta confermata da DMARC. Per garantire una protezione ottimale anche in questi casi, si raccomanda come misura di sicurezza supplementare l\u2019uso di strumenti quali la <a href=\"https:\/\/www.retarus.com\/it\/services\/email-security\/tech-specs\/#cxo-fraud-detection\" target=\"_blank\" rel=\"noreferrer noopener\">CxO Fraud Protection<\/a> per la difesa nel contesto del Business Email Compromise (BEC).<\/p>   <p class=\"wp-block-paragraph\">Per informazioni su questo argomento, potete rivolgervi direttamente al vostro referente e alla <a href=\"https:\/\/www.retarus.com\/it\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">assistenza tecnica di Retarus<\/a>.<\/p> ","protected":false},"excerpt":{"rendered":"<p>Per i destinatari \u00e8 spesso difficile riconoscere se i messaggi e-mail provengono veramente dal mittente indicato. Standard come SPF, DKIM e DMARC e Email Security Services possono aiutare a identificare gli attacchi sotto falso nome.<\/p>\n","protected":false},"author":12,"featured_media":16144,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ret_read_more_text":"","ret_thumb_border":false,"footnotes":""},"categories":[3061],"tags":[2322],"ret_content_type":[3096,3100],"class_list":["post-33320","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sicurezza-informatica","tag-email-security","ret_content_type-industry-news","ret_content_type-product-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Autenticazione e-mail completa: da DMARC alla compromissione della posta elettronica aziendale<\/title>\n<meta name=\"description\" content=\"Isolare preventivamente i messaggi di una regione o di un paese specifico: Retarus Predelivery Logic identifica i messaggi e-mail in base al \u201cSource IP Country\u201d (Paese IP di origine) e avvia automaticamente le misure appropriate.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.retarus.com\/blog\/it\/comprehensive-email-authentication-from-dmarc-to-business-email-compromise\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Autenticazione e-mail completa: da DMARC alla compromissione della posta elettronica aziendale\" \/>\n<meta property=\"og:description\" content=\"Isolare preventivamente i messaggi di una regione o di un paese specifico: Retarus Predelivery Logic identifica i messaggi e-mail in base al \u201cSource IP Country\u201d (Paese IP di origine) e avvia 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