{"id":7827,"date":"2026-10-18T11:57:48","date_gmt":"2026-10-18T09:57:48","guid":{"rendered":"https:\/\/eu.it-cyberwall.com\/guides\/spf-dkim-y-dmarc-proteger-el-correo-de-una-pyme\/"},"modified":"2026-10-18T20:25:51","modified_gmt":"2026-10-18T18:25:51","slug":"spf-dkim-dmarc","status":"publish","type":"page","link":"https:\/\/eu.it-cyberwall.com\/es\/guides\/spf-dkim-dmarc\/","title":{"rendered":"SPF, DKIM y DMARC: proteger el correo de una pyme"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7827\" class=\"elementor elementor-7827 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\">Gu\u00eda<\/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 y DMARC: proteger el correo de una pyme<\/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 y DMARC impiden que se env\u00eden correos falsos en su nombre y ayudan a que sus mensajes reales lleguen. Google, Yahoo y Microsoft ya los exigen a los grandes remitentes. Le explicamos con claridad lo que hacen y c\u00f3mo implantarlos sin bloquear sus propias facturas.<\/p><p class=\"note\" style=\"text-align:center\">Actualizado el 18 de octubre de 2026 \u00b7 Las cifras tienen su fuente al pie de p\u00e1gina; las valoraciones son de 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>Contenido:<\/strong><br \/><a href=\"#pourquoi\">Por qu\u00e9 le concierne<\/a> \u00b7 <a href=\"#trois\">SPF, DKIM y DMARC con claridad<\/a> \u00b7 <a href=\"#exigences\">Lo que exigen Google, Yahoo y Microsoft<\/a> \u00b7 <a href=\"#etapes\">La implantaci\u00f3n, paso a paso<\/a> \u00b7 <a href=\"#it-cyberwall\">Lo que hace IT CyberWall<\/a> \u00b7 <a href=\"#sources\">Fuentes<\/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\">Por qu\u00e9 le concierne<\/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>Cualquiera puede enviar un correo que parezca proceder de su dominio: una factura falsa a sus clientes, una orden de transferencia falsa a su contable. Tres ajustes, publicados en el DNS de su nombre de dominio, permiten a los servidores de correo de sus destinatarios reconocer sus mensajes reales. Protegen su correo y su reputaci\u00f3n, no sus datos: no son una copia de seguridad.<\/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 y DMARC con claridad<\/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>Ajuste<\/th><th>Lo que indica<\/th><th>Imagen<\/th><\/tr><\/thead><tbody><tr><td><strong>SPF<\/strong><\/td><td>La lista de servidores autorizados a enviar mensajes en nombre de su dominio<sup><a href=\"#source-1\">[1]<\/a><\/sup>.<\/td><td>La lista de carteros autorizados.<\/td><\/tr><tr><td><strong>DKIM<\/strong><\/td><td>Una firma digital a\u00f1adida a cada mensaje, que vincula el mensaje a su dominio<sup><a href=\"#source-2\">[2]<\/a><\/sup>.<\/td><td>El sello de la empresa en el sobre.<\/td><\/tr><tr><td><strong>DMARC<\/strong><\/td><td>Su instrucci\u00f3n a los destinatarios cuando un mensaje no supera los controles (no hacer nada, enviarlo a correo no deseado, rechazarlo), y el env\u00edo de informes<sup><a href=\"#source-3\">[3]<\/a><\/sup>.<\/td><td>La instrucci\u00f3n dejada en recepci\u00f3n.<\/td><\/tr><\/tbody><\/table><p>La ANSSI dedica a estos tres mecanismos una parte de sus recomendaciones sobre la interconexi\u00f3n de un sistema de informaci\u00f3n 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\">Lo que exigen Google, Yahoo y 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>, desde el 1 de febrero de 2024: SPF o DKIM para todos los remitentes; SPF, DKIM y DMARC para quienes env\u00edan m\u00e1s de 5 000 mensajes al d\u00eda a Gmail<sup><a href=\"#source-5\">[5]<\/a><\/sup>.<\/li><li><strong>Yahoo<\/strong>: SPF o DKIM para todos; SPF, DKIM y DMARC para los env\u00edos masivos<sup><a href=\"#source-6\">[6]<\/a><\/sup>.<\/li><li><strong>Microsoft Outlook.com<\/strong>, desde el 5 de mayo de 2025: SPF, DKIM y DMARC para los dominios que env\u00edan m\u00e1s de 5 000 mensajes al d\u00eda; si no, los mensajes van a correo no deseado y despu\u00e9s se rechazan<sup><a href=\"#source-7\">[7]<\/a><\/sup>.<\/li><\/ul><p>Incluso a una pyme que env\u00eda pocos mensajes le conviene publicar los tres: sus facturas y presupuestos llegan mejor, y su nombre es m\u00e1s dif\u00edcil de suplantar.<\/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\">La implantaci\u00f3n, paso a paso<\/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>Identificar todo lo que env\u00eda mensajes en su nombre<\/strong>: correo, software de facturaci\u00f3n, CRM, sitio web, herramienta de e-mailing, impresora que env\u00eda escaneos.<\/li><li><strong>Publicar un SPF<\/strong> que enumere estos remitentes, sin olvidar ninguno.<\/li><li><strong>Activar DKIM<\/strong> en cada servicio que lo permita.<\/li><li><strong>Publicar un DMARC en observaci\u00f3n<\/strong> (pol\u00edtica \u00abnone\u00bb) y recibir los informes.<\/li><li><strong>Leer los informes<\/strong> durante unas semanas: revelan los remitentes olvidados y las suplantaciones.<\/li><li><strong>Endurecer progresivamente<\/strong>: env\u00edo a correo no deseado (\u00abquarantine\u00bb) y despu\u00e9s rechazo (\u00abreject\u00bb), que es lo que recomienda Microsoft<sup><a href=\"#source-7\">[7]<\/a><\/sup>.<\/li><\/ol><div class=\"box\"><strong>La trampa.<\/strong> Pasar directamente al rechazo sin haber identificado a sus remitentes bloquea sus propias facturas. La fase de observaci\u00f3n no es opcional.<\/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\">Lo que hace 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>Hacemos el inventario de sus remitentes, publicamos y probamos los registros SPF, DKIM y DMARC, leemos los informes con usted y endurecemos la pol\u00edtica cuando no hay riesgo. Es una intervenci\u00f3n breve, que se integra en nuestros servicios de <a href=\"https:\/\/eu.it-cyberwall.com\/es\/cybersecurite\/\">ciberseguridad<\/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\">\u00bfSus correos llegan a la carpeta de correo no deseado o suplantan su nombre?<\/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>Comprobamos sus registros e implantamos SPF, DKIM y 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\/es\/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\">Describir mi necesidad<\/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\/es\/guides\/\">\u2190 Todas nuestras gu\u00edas<\/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\">Fuentes<\/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\">Fuentes consultadas el 18 de octubre de 2026. Las tarifas de los proveedores se indican sin impuestos, en la divisa y la regi\u00f3n de la tarifa publicada, y pueden cambiar: compruebe siempre la p\u00e1gina oficial antes de decidir.<\/p><ol class=\"src\"><li id=\"source-1\">IETF \u2013 RFC 7208, Sender Policy Framework (SPF), abril de 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, septiembre de 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 (mayo de 2026, sustituye a 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 de junio de 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":7724,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"SPF, DKIM y DMARC para pymes europeas | IT CyberWall","_seopress_titles_desc":"SPF, DKIM y DMARC explicados con sencillez, requisitos de Google, Yahoo y Microsoft y configuraci\u00f3n paso a paso para el correo de una pyme 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dkim dmarc,configurar dmarc,proteger correo empresa europa,suplantaci\u00f3n de correo 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