{"id":4083,"date":"2018-01-08T17:47:12","date_gmt":"2018-01-08T16:47:12","guid":{"rendered":"https:\/\/test-blog.mailfence.com\/?p=4083"},"modified":"2025-09-17T12:19:24","modified_gmt":"2025-09-17T10:19:24","slug":"spf-dkim-y-dmarc-defensa-contra-la-suplantacion-spoofing-en-dominios-personalizados","status":"publish","type":"post","link":"https:\/\/blog.mailfence.com\/es\/spf-dkim-y-dmarc-defensa-contra-la-suplantacion-spoofing-en-dominios-personalizados\/","title":{"rendered":"SPF, DKIM y DMARC:  Defensa contra la suplantaci\u00f3n (spoofing) en dominios personalizados"},"content":{"rendered":"\n<p>Debido a la <a href=\"https:\/\/en.wikipedia.org\/wiki\/Simple_Mail_Transfer_Protocol\">naturaleza abierta y descentralizada del SMTP<\/a>, la suplantaci\u00f3n (en ingl\u00e9s, <em>spoofing<\/em>) de e-mails es un problema com\u00fan. Todos los servidores conectados a la internet pueden enviar un e-mail usando su direcci\u00f3n, suplantando as\u00ed su identidad. Al <a href=\"https:\/\/blog.mailfence.com\/es\/correo-con-dominio-propio\/\">utilizar un dominio personalizado<\/a> con Mailfence, le recomendamos implementar las siguientes medidas de defensa contra la suplantaci\u00f3n.<\/p>\n\n\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"100846\" class=\"elementor elementor-100846 elementor-100761\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-124e1725 elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"124e1725\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-654e4e21\" data-id=\"654e4e21\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\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-3a3b1a23 elementor-widget elementor-widget-text-editor\" data-id=\"3a3b1a23\" 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><b>Mailfence &#8211; Su paquete de productividad seguro<\/b><\/p>\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-2c004279 elementor-widget elementor-widget-text-editor\" data-id=\"2c004279\" 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><strong>Recupere su privacidad con<\/strong><\/p>\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-83e0dd6 elementor-icon-list--layout-inline elementor-align-center elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"83e0dd6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-envelope-open-text\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M176 216h160c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16H176c-8.84 0-16 7.16-16 16v16c0 8.84 7.16 16 16 16zm-16 80c0 8.84 7.16 16 16 16h160c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16H176c-8.84 0-16 7.16-16 16v16zm96 121.13c-16.42 0-32.84-5.06-46.86-15.19L0 250.86V464c0 26.51 21.49 48 48 48h416c26.51 0 48-21.49 48-48V250.86L302.86 401.94c-14.02 10.12-30.44 15.19-46.86 15.19zm237.61-254.18c-8.85-6.94-17.24-13.47-29.61-22.81V96c0-26.51-21.49-48-48-48h-77.55c-3.04-2.2-5.87-4.26-9.04-6.56C312.6 29.17 279.2-.35 256 0c-23.2-.35-56.59 29.17-73.41 41.44-3.17 2.3-6 4.36-9.04 6.56H96c-26.51 0-48 21.49-48 48v44.14c-12.37 9.33-20.76 15.87-29.61 22.81A47.995 47.995 0 0 0 0 200.72v10.65l96 69.35V96h320v184.72l96-69.35v-10.65c0-14.74-6.78-28.67-18.39-37.77z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Mensajes<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-calendar-alt\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M148 288h-40c-6.6 0-12-5.4-12-12v-40c0-6.6 5.4-12 12-12h40c6.6 0 12 5.4 12 12v40c0 6.6-5.4 12-12 12zm108-12v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm96 0v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm-96 96v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm-96 0v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm192 0v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm96-260v352c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V112c0-26.5 21.5-48 48-48h48V12c0-6.6 5.4-12 12-12h40c6.6 0 12 5.4 12 12v52h128V12c0-6.6 5.4-12 12-12h40c6.6 0 12 5.4 12 12v52h48c26.5 0 48 21.5 48 48zm-48 346V160H48v298c0 3.3 2.7 6 6 6h340c3.3 0 6-2.7 6-6z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Calendarios<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-folder\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M464 128H272l-54.63-54.63c-6-6-14.14-9.37-22.63-9.37H48C21.49 64 0 85.49 0 112v288c0 26.51 21.49 48 48 48h416c26.51 0 48-21.49 48-48V176c0-26.51-21.49-48-48-48zm0 272H48V112h140.12l54.63 54.63c6 6 14.14 9.37 22.63 9.37H464v224z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Documentos<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-users-cog\" viewBox=\"0 0 640 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M610.5 341.3c2.6-14.1 2.6-28.5 0-42.6l25.8-14.9c3-1.7 4.3-5.2 3.3-8.5-6.7-21.6-18.2-41.2-33.2-57.4-2.3-2.5-6-3.1-9-1.4l-25.8 14.9c-10.9-9.3-23.4-16.5-36.9-21.3v-29.8c0-3.4-2.4-6.4-5.7-7.1-22.3-5-45-4.8-66.2 0-3.3.7-5.7 3.7-5.7 7.1v29.8c-13.5 4.8-26 12-36.9 21.3l-25.8-14.9c-2.9-1.7-6.7-1.1-9 1.4-15 16.2-26.5 35.8-33.2 57.4-1 3.3.4 6.8 3.3 8.5l25.8 14.9c-2.6 14.1-2.6 28.5 0 42.6l-25.8 14.9c-3 1.7-4.3 5.2-3.3 8.5 6.7 21.6 18.2 41.1 33.2 57.4 2.3 2.5 6 3.1 9 1.4l25.8-14.9c10.9 9.3 23.4 16.5 36.9 21.3v29.8c0 3.4 2.4 6.4 5.7 7.1 22.3 5 45 4.8 66.2 0 3.3-.7 5.7-3.7 5.7-7.1v-29.8c13.5-4.8 26-12 36.9-21.3l25.8 14.9c2.9 1.7 6.7 1.1 9-1.4 15-16.2 26.5-35.8 33.2-57.4 1-3.3-.4-6.8-3.3-8.5l-25.8-14.9zM496 368.5c-26.8 0-48.5-21.8-48.5-48.5s21.8-48.5 48.5-48.5 48.5 21.8 48.5 48.5-21.7 48.5-48.5 48.5zM96 224c35.3 0 64-28.7 64-64s-28.7-64-64-64-64 28.7-64 64 28.7 64 64 64zm224 32c1.9 0 3.7-.5 5.6-.6 8.3-21.7 20.5-42.1 36.3-59.2 7.4-8 17.9-12.6 28.9-12.6 6.9 0 13.7 1.8 19.6 5.3l7.9 4.6c.8-.5 1.6-.9 2.4-1.4 7-14.6 11.2-30.8 11.2-48 0-61.9-50.1-112-112-112S208 82.1 208 144c0 61.9 50.1 112 112 112zm105.2 194.5c-2.3-1.2-4.6-2.6-6.8-3.9-8.2 4.8-15.3 9.8-27.5 9.8-10.9 0-21.4-4.6-28.9-12.6-18.3-19.8-32.3-43.9-40.2-69.6-10.7-34.5 24.9-49.7 25.8-50.3-.1-2.6-.1-5.2 0-7.8l-7.9-4.6c-3.8-2.2-7-5-9.8-8.1-3.3.2-6.5.6-9.8.6-24.6 0-47.6-6-68.5-16h-8.3C179.6 288 128 339.6 128 403.2V432c0 26.5 21.5 48 48 48h255.4c-3.7-6-6.2-12.8-6.2-20.3v-9.2zM173.1 274.6C161.5 263.1 145.6 256 128 256H64c-35.3 0-64 28.7-64 64v32c0 17.7 14.3 32 32 32h65.9c6.3-47.4 34.9-87.3 75.2-109.4z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Grupos<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-436babb elementor-align-center elementor-widget elementor-widget-button\" data-id=\"436babb\" 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:\/\/mailfence.com\/es\/#pricing\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Obtener Mailfence gratis<\/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\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\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-convenio-de-remitentes-spf-del-ingles-sender-policy-framework\"><strong>Convenio de Remitentes (SPF, del ingl\u00e9s <em>Sender Policy Framework<\/em>)<\/strong><\/h2>\n\n\n\n<p>Los registros del <a href=\"https:\/\/es.wikipedia.org\/wiki\/Sender_Policy_Framework\">Convenio de Remitentes (SPF)<\/a> rle indican al destinatario cuales servicios de alojamiento (hosting, en ingl\u00e9s) o direcciones IP pueden enviar e-mails a su dominio. Ser\u00e1 necesario que incluya registros de DNS tipo \u00abTXT\u00bb con el nombre \u00ab@\u00bb (si es que el campo est\u00e1 presente) mediante su proveedor de alojamiento, registrador de dominio, o proveedor de DNS. Le recomendamos consultar la documentaci\u00f3n de \u00abayuda\u00bb de su proveedor para obtener informaci\u00f3n espec\u00edfica acerca de c\u00f3mo a\u00f1adir registros TXT.<\/p>\n\n\n\n<div>En su registro de SPF, usted podr\u00e1 \u00abincluir\u00bb el siguiente dominio _spf.mailfence.com, con los siguientes valores:<\/div>\n\n\n\n<div>&nbsp;<\/div>\n\n\n\n<div>Si los e-mails ser\u00e1n enviados solamente utilizando los servidores de Mailfence.com (correo web, SMTP autentificado, reenv\u00edo):<\/div>\n\n\n\n<div>&nbsp;<\/div>\n\n\n\n<div>&nbsp;<strong>v=spf1 include:_spf.mailfence.com -all<\/strong><\/div>\n\n\n\n<div>&nbsp;<\/div>\n\n\n\n<div>Si los e-mails van a ser enviados desde otros servidores, utilice:<\/div>\n\n\n\n<div>&nbsp;<\/div>\n\n\n\n<div><strong>v=spf1 include:_spf.mailfence.com ~all<\/strong><\/div>\n\n\n\n<div>&nbsp;<\/div>\n\n\n\n<div>Esto ayudar\u00e1 a proteger su dominio contra atacantes y\/o <a href=\"https:\/\/blog.mailfence.com\/es\/subdireccionamiento-para-rastrear-a-los-spammers\/\">spammers<\/a> que env\u00edan e-mails con encabezados suplantados, y le ofrecer\u00e1 un mayor nivel de legitimidad a los e-mails que env\u00ede.<\/div>\n\n\n\n<div>&nbsp;<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-correo-con-identificacion-por-domainkeys-dkim-del-ingles-domainkeys-identified-mail\"><strong>Correo con Identificaci\u00f3n por DomainKeys (DKIM, del ingl\u00e9s <em>DomainKeys Identified Mail<\/em>)<\/strong><\/h2>\n\n\n\n<p>El <a href=\"https:\/\/es.wikipedia.org\/wiki\/DomainKeys_Identified_Mail\">Correo con Identificaci\u00f3n por DomainKeys (DKIM)<\/a> es un m\u00e9todo de autentificaci\u00f3n de e-mail que verifica criptogr\u00e1ficamente si un e-mail ha sido enviado por servidores autorizados, y no ha sido modificado durante su tr\u00e1nsito. En caso de que usted desee que activemos la firma DKIM (recomendada) en los e-mails enviados a trav\u00e9s de nuestros servidores con una direcci\u00f3n de remitente que contenga su dominio, por favor notif\u00edquenos por e-mail.<\/p>\n\n\n\n<p>Por favor, incluya el nombre de su dominio y el nombre de usuario de su cuenta en esta notificaci\u00f3n, para que podamos avisarle en cuanto lo activemos para su dominio.<\/p>\n\n\n\n<p>Nota: en adelante, cada uno de sus correos electr\u00f3nicos ser\u00e1 firmado con la clave DKIM del dominio de Mailfence, de manera que no necesitar\u00e1 configurar nadad en su zona DNS. Esto les elimina a los usuarios el trabajo de tener que generar, gestionar, rotar y desechar con seguridad las claves DKIM comprometidas u obsoletas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-autentificacion-comunicacion-y-conformidad-de-mensajes-en-base-al-dominio-dmarc-del-ingles-domain-based-message-authentication-reporting-and-conformance\"><strong>Autentificaci\u00f3n, Comunicaci\u00f3n y Conformidad de Mensajes en base al Dominio (DMARC, del ingl\u00e9s <em>Domain-based Message Authentication, Reporting and Conformance<\/em>)<\/strong><\/h2>\n\n\n\n<p>Despu\u00e9s de haber cubierto los temas de SPF y DKIM, la pregunta es: \u00bfqu\u00e9 deber\u00eda hacer un servidor que recibe un e-mail que no ha superado todas estas comprobaciones? Es ah\u00ed donde la <a href=\"https:\/\/en.wikipedia.org\/wiki\/DMARC\">Autentificaci\u00f3n, Comunicaci\u00f3n y Conformidad de Mensajes en base al Dominio (DMARC)<\/a> entra en escena, permitiendo al due\u00f1o del dominio especificar lo que deber\u00eda ocurrir con esas comprobaciones fallidas, as\u00ed como el recibir informes y retroalimentaci\u00f3n.<\/p>\n\n\n\n<p>Ser\u00e1 necesario que incluya registros de DNS tipo \u00abTXT\u00bb con el nombre \u00abdmarc\u00bb (que conformar\u00e1 un registro TXT como \u00ab_dmarc.sudominio.com\u00bb dependiendo de la aceptaci\u00f3n de proveedores de dominios DNS\/dominios\/hosting) mediante su proveedor de alojamiento, registrador de dominio, o proveedor de DNS. Le recomendamos consultar la documentaci\u00f3n de \u00abayuda\u00bb de su proveedor para obtener informaci\u00f3n espec\u00edfica acerca de c\u00f3mo a\u00f1adir registros TXT.<\/p>\n\n\n\n<p>Nota: si usted ya tiene un registro TXT de DNS con el nombre \u00ab_dmarc\u00bb para su dominio, entonces puede editar este registro en lugar de crear uno nuevo. Esto es importante, puesto que no es posible tener m\u00faltiples registros DMARV para un dominio dado.<\/p>\n\n\n\n<p><strong>v=DMARC1; p=none; rua=mailto:reports@yourdomain.com;<\/strong><\/p>\n\n\n\n<p>La \u00abp=\u00bb especifica la acci\u00f3n a emprender con los e-mails que no superen el DMARC y, en este caso, \u00abnone\u00bb significa b\u00e1sicamente que no se deben tomar acciones m\u00e1s all\u00e1 de seguir la pol\u00edtica del destinatario. Las otras opciones son poner en cuarentena y rechazar. Sin embargo, cabe destacar que la l\u00ednea de c\u00f3digo antes indicada corresponde al modo de \u00absolamente informes\u00bb (recomendado), y no tendr\u00e1 efecto alguno sobre el despacho de sus e-mails. Si usted est\u00e1 considerando el asignar \u00abponer en cuarentena\u00bb o \u00abrechazar\u00bb, aseg\u00farese de que comprende los <a href=\"https:\/\/en.wikipedia.org\/wiki\/DMARC#Compatibility\">riesgos que esto conlleva para su entrega de e-mails<\/a>.<\/p>\n\n\n\n<p>La direcci\u00f3n de ejemplo \u00abreports@sudominio.com\u00bb es donde usted recibir\u00e1 los informes DMARC de otros proveedores de servicios. Por favor, reemplace esta direcci\u00f3n con una direcci\u00f3n propia.<strong>re<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-nota-al-pie-acerca-de-spf-dkim-y-dmarc\"><strong>Nota al pie acerca de SPF, DKIM y DMARC:<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cuando usted modifica un registro preexistente de DNS, los cambios podr\u00edan no propagarse de inmediato (podr\u00edan tardar horas o d\u00edas, dependiendo del valor TTL de los registros anteriores).<\/li>\n\n\n\n<li>Existe una amplia variedad de herramientas externas que usted puede utilizar para hacer m\u00e1s pruebas al SPF (e.g., http:\/\/www.kitterman.com\/spf\/validate.html), al DKIM (e.g., http:\/\/dkimvalidator.com) o ambos (e.g., https:\/\/www.mail-tester.com).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-la-defensa-definitiva-contra-la-suplantacion-las-firmas-digitales\"><strong>La defensa definitiva contra la suplantaci\u00f3n: las firmas digitales<\/strong><\/h2>\n\n\n\n<p><span id=\"snippet_meta\" class=\"desc desc-render\">Adem\u00e1s de las otras defensas contra la suplantaci\u00f3n y manipulaci\u00f3n, como <a href=\"https:\/\/blog.mailfence.com\/es\/mailfence-implementa-spf-sender-policy-framework-2\/\">SPF<\/a>, DKIM y DMARC<\/span>, Mailfence le ofrece la capacidad de <a href=\"https:\/\/blog.mailfence.com\/es\/firmas-digitales-para-e-mail\/\">firmar digitalmente<\/a> con firmas OpenPGP. En nuestra opini\u00f3n, esta es la defensa definitiva contra la manipulaci\u00f3n y la suplantaci\u00f3n. Usted puede elegir el par de claves OpenPGP que prefiera, <a href=\"https:\/\/blog.mailfence.com\/es\/deposito-de-claves\/\">y controlarlas completamente<\/a>. Usted tambi\u00e9n puede decidir, en todo momento, cuales e-mails quiere firmar y cuales no, o puede elegir firmarlos todos de manera predeterminada.<\/p>\n\n\n\n<p>\u00bfTiene alguna pregunta? No dude en contactar a nuestro departamento de soporte t\u00e9cnico.<\/p>\n\n\n\n<p>S\u00edganos en <a href=\"https:\/\/twitter.com\/mailfence\" target=\"_blank\" rel=\"noopener noreferrer\">twitter<\/a>\/<a href=\"https:\/\/www.reddit.com\/r\/mailfence\" target=\"_blank\" rel=\"noopener noreferrer\">reddit<\/a> y mant\u00e9ngase actualizado en todo momento.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Debido a la naturaleza abierta y descentralizada del SMTP, la suplantaci\u00f3n (en ingl\u00e9s, spoofing) de e-mails es un problema com\u00fan. Todos los servidores conectados a la internet pueden enviar un e-mail usando su direcci\u00f3n, suplantando as\u00ed su identidad. Al utilizar un dominio personalizado con Mailfence, le recomendamos implementar las siguientes medidas de defensa contra la [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":85876,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,857,1],"tags":[],"class_list":["post-4083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","category-seguridad","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>DKIM, SPF y DMARC: Defensa anti-spoofing en dominios personalizados<\/title>\n<meta name=\"description\" content=\"la suplantaci\u00f3n (spoofing) de e-mail es una pr\u00e1ctica com\u00fan. 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