<style id="elementor-post-10796">.elementor-10796 .elementor-element.elementor-element-b49101b img{width:400px;}.elementor-10796 .elementor-element.elementor-element-5462d82 .elementor-button-content-wrapper{flex-direction:row-reverse;}.elementor-10796 .elementor-element.elementor-element-5462d82 .elementor-button .elementor-button-content-wrapper{gap:10px;}</style>{"id":10796,"date":"2024-06-03T12:39:23","date_gmt":"2024-06-03T10:39:23","guid":{"rendered":"https:\/\/www.infordisa.com\/soc\/?p=10796"},"modified":"2025-08-18T13:16:14","modified_gmt":"2025-08-18T11:16:14","slug":"bones-practiques-de-seguretat-al-correu-electronic-dmarc","status":"publish","type":"post","link":"https:\/\/www.infordisa.com\/soc\/ca\/buenas-practicas-de-seguridad-en-el-correo-electronico-dmarc\/","title":{"rendered":"Bones Pr\u00e0ctiques de Seguretat al Correu Electr\u00f2nic: DMARC"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"10796\" class=\"elementor elementor-10796\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-dc1d37a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dc1d37a\" data-element_type=\"section\" data-e-type=\"section\">\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-d8687c5\" data-id=\"d8687c5\" 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-b49101b elementor-widget elementor-widget-image\" data-id=\"b49101b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/Implementacion-de-DMARC-1024x538.jpg\" class=\"attachment-large size-large wp-image-10799\" alt=\"\" srcset=\"https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/Implementacion-de-DMARC-1024x538.jpg 1024w, https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/Implementacion-de-DMARC-300x158.jpg 300w, https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/Implementacion-de-DMARC-768x403.jpg 768w, https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/Implementacion-de-DMARC-18x9.jpg 18w, https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/Implementacion-de-DMARC.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"\/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5462d82 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"5462d82\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2024\/06\/BP-33-Buenas-Practicas-de-Seguridad-en-el-correo-electronico-DMARC.pdf\" target=\"_blank\">\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<i aria-hidden=\"true\" class=\"fas fa-external-link-alt\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">CCN-CERT BP-33<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc6c872 elementor-widget elementor-widget-text-editor\" data-id=\"fc6c872\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>En mayo de 2024, el Centro Criptol&oacute;gico Nacional (CCN-CERT) public&oacute; un informe titulado &laquo;Buenas Pr&aacute;cticas de Seguridad en el Correo Electr&oacute;nico: DMARC&raquo;. Este documento aborda la importancia de la implementaci&oacute;n del <a class=\"glossaryLink\"  href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/protocolo\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>protocolo<\/a> DMARC (Domain-based Message Authentication, Reporting &amp; Conformance) en las instituciones p&uacute;blicas para fortalecer la seguridad y <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/autenticacion\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">autenticaci&oacute;n<\/a> del correo electr&oacute;nico, prevenir el <a class=\"glossaryLink\"  href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/phishing\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>phishing<\/a> y otros ciberataques relacionados.<\/p><h3><strong>Objetivo de la Gu&iacute;a<\/strong><\/h3><p>El objetivo principal del documento es explicar el concepto de DMARC, sus aplicaciones pr&aacute;cticas y las implicaciones de su implementaci&oacute;n. El protocolo DMARC se centra en verificar la <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/autenticidad\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">autenticidad<\/a> del correo electr&oacute;nico e impedir que correos falsos lleguen a su destino. El documento tambi&eacute;n detalla c&oacute;mo DMARC ayuda a prevenir intentos de <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/suplantacion-de-identidad\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">suplantaci&oacute;n de identidad<\/a> y otros ciberataques.<\/p><h3><strong>Introducci&oacute;n a DMARC y su Importancia<\/strong><\/h3><p>DMARC es un protocolo que surgi&oacute; para complementar las limitaciones de los m&eacute;todos SPF (Sender Policy Framework) y DKIM (DomainKeys Identified Mail). Permite a los propietarios de dominios especificar pol&iacute;ticas sobre c&oacute;mo manejar los correos electr&oacute;nicos que no pasan las verificaciones de autenticidad y ofrece un formato est&aacute;ndar de informes que ayudan a monitorear y mejorar la seguridad del correo electr&oacute;nico.<\/p><p>Para las instituciones p&uacute;blicas, la implementaci&oacute;n de DMARC es crucial porque:<\/p><ol><li><strong>Protege contra la suplantaci&oacute;n de identidad<\/strong>, impidiendo que actores maliciosos env&iacute;en correos fraudulentos que parezcan provenir de dominios leg&iacute;timos.<\/li><li><strong>Asegura la <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/integridad\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">integridad<\/a> de la informaci&oacute;n<\/strong> enviada por correo electr&oacute;nico.<\/li><li><strong>Incrementa la confianza del ciudadano<\/strong> en las comunicaciones electr&oacute;nicas de las instituciones.<\/li><li><strong>Preserva la soberan&iacute;a y la integridad<\/strong> ante campa&ntilde;as de desinformaci&oacute;n y ciberataques.<\/li><\/ol><h3><strong>Consideraciones T&eacute;cnicas para la Implementaci&oacute;n de DMARC<\/strong><\/h3><p>Antes de implementar DMARC, es esencial configurar correctamente SPF y DKIM:<\/p><ul><li><strong>SPF<\/strong> permite a los propietarios de dominios especificar qu&eacute; servidores de correo est&aacute;n autorizados para enviar correos electr&oacute;nicos en su nombre.<\/li><li><strong>DKIM<\/strong> a&ntilde;ade una firma digital a los correos electr&oacute;nicos para verificar su autenticidad.<\/li><\/ul><p>La gu&iacute;a detalla c&oacute;mo crear y configurar estos registros en el <a class=\"glossaryLink\"  href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/dns\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>DNS<\/a> del dominio y ofrece ejemplos pr&aacute;cticos para garantizar una correcta implementaci&oacute;n.<\/p><h3><strong>Planificaci&oacute;n y Preparaci&oacute;n<\/strong><\/h3><p>Antes de implementar DMARC, se recomienda realizar una auditor&iacute;a completa de la infraestructura de correo electr&oacute;nico y seguir los siguientes pasos:<\/p><ol><li><strong>An&aacute;lisis de la infraestructura de correo electr&oacute;nico<\/strong> para identificar todos los dominios y sistemas utilizados para enviar correos electr&oacute;nicos.<\/li><li><strong>Configuraci&oacute;n de SPF y DKIM<\/strong> para asegurar que todos los servidores autorizados est&eacute;n listados y alineados correctamente.<\/li><li><strong>Determinaci&oacute;n de la configuraci&oacute;n inicial de DMARC<\/strong> y publicaci&oacute;n de un registro DMARC con una pol&iacute;tica de monitorizaci&oacute;n inicial (p=none) para evaluar el nivel de alineamiento.<\/li><li><strong>Establecimiento de un <a class=\"glossaryLink\"  href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/protocolo\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>protocolo<\/a> de monitorizaci&oacute;n continua<\/strong> y ajuste de la pol&iacute;tica DMARC basado en los informes recibidos.<\/li><li><strong>Documentaci&oacute;n y registro<\/strong> de todas las acciones y decisiones relacionadas con DMARC, SPF y DKIM.<\/li><li><strong>Formaci&oacute;n y concienciaci&oacute;n<\/strong> del personal t&eacute;cnico sobre la importancia de la autenticaci&oacute;n del correo electr&oacute;nico y c&oacute;mo DMARC puede ayudar a proteger contra amenazas.<\/li><\/ol><h3><strong>Implementaci&oacute;n Inicial desde Cero<\/strong><\/h3><p>Para las entidades que nunca han implementado DMARC, se recomienda comenzar con una pol&iacute;tica de monitorizaci&oacute;n (p=none) y ajustar gradualmente las configuraciones de SPF y DKIM bas&aacute;ndose en los informes de DMARC. Este enfoque permite identificar y corregir problemas antes de avanzar a pol&iacute;ticas m&aacute;s estrictas como &laquo;quarantine&raquo; o &laquo;reject&raquo;.<\/p><h3><strong>Implementaci&oacute;n Progresiva y Refinamiento<\/strong><\/h3><p>La gu&iacute;a sugiere un enfoque gradual para aumentar la proporci&oacute;n de correos enviados a cuarentena y eventualmente rechazar aquellos que no pasen las verificaciones. Se recomienda:<\/p><ol><li><strong>Monitorizar continuamente los informes de DMARC<\/strong> para identificar cambios en el comportamiento del correo electr&oacute;nico.<\/li><li><strong>Ajustar las configuraciones de SPF y DKIM<\/strong> bas&aacute;ndose en los hallazgos de las revisiones.<\/li><li><strong>Preparar para pol&iacute;ticas m&aacute;s estrictas<\/strong> una vez que se logre un alto nivel de alineamiento con DMARC.<\/li><\/ol><h3><strong>Implicaciones de la Implementaci&oacute;n<\/strong><\/h3><p>DMARC no cifra los correos electr&oacute;nicos ni previene todo el spam, pero mejora significativamente la autenticaci&oacute;n y la seguridad del correo electr&oacute;nico. No garantiza la entrega de todos los correos leg&iacute;timos y depende de la correcta configuraci&oacute;n de SPF y DKIM para funcionar eficazmente. Es crucial entender que DMARC no protege contra todos los tipos de ataques de phishing y no corrige autom&aacute;ticamente configuraciones err&oacute;neas de SPF y DKIM.<\/p><p>En conclusi&oacute;n, la implementaci&oacute;n de DMARC es un proceso continuo y escalonado que requiere monitorizaci&oacute;n y ajustes constantes para mejorar la seguridad del correo electr&oacute;nico en las instituciones p&uacute;blicas. Para m&aacute;s detalles y ejemplos pr&aacute;cticos, se recomienda descargar el documento completo del Centro Criptol&oacute;gico Nacional.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\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":"<p>C&oacute;mo fortalecer la seguridad y <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/autenticacion\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">autenticaci&oacute;n<\/a> del correo electr&oacute;nico, prevenir el <a class=\"glossaryLink\"  href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/phishing\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>phishing<\/a> y otros ciberataques relacionados.<\/p>\n","protected":false},"author":2,"featured_media":10799,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[8],"tags":[131,193,58],"class_list":["post-10796","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-buenas-practicas","tag-ccn","tag-dmarc","tag-phishing","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"<title>Buenas Pr\u00e1cticas de Seguridad en el Correo Electr\u00f3nico: DMARC - INFORDISA \/ Security Operations Center<\/title>\n<meta name=\"description\" content=\"C\u00f3mo fortalecer la seguridad y autenticaci\u00f3n del correo electr\u00f3nico, prevenir el phishing y otros ciberataques relacionados.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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