{"id":26712,"date":"2026-11-09T15:10:32","date_gmt":"2026-11-09T15:10:32","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/mailgun-smtp-pasa-tls-1-2-que-hacer-antes-actualizacion-1-marzo-2027\/"},"modified":"2026-11-09T18:02:33","modified_gmt":"2026-11-09T18:02:33","slug":"mailgun-smtp-pasa-tls-1-2-que-hacer-antes-actualizacion-1-marzo-2027","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/es\/blog\/product\/mailgun-smtp-pasa-tls-1-2-que-hacer-antes-actualizacion-1-marzo-2027\/","title":{"rendered":"El SMTP de Mailgun pasa a TLS 1.2: qu\u00e9 debes hacer antes de la actualizaci\u00f3n del 1 de marzo de 2027"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Si tu aplicaci\u00f3n env\u00eda restablecimientos de contrase\u00f1a, recibos, c\u00f3digos de inicio de sesi\u00f3n u otra mensajer\u00eda transaccional con Mailgun a trav\u00e9s de SMTP utilizando una versi\u00f3n antigua de TLS, Mailgun no podr\u00e1 aceptarlos a partir del 1 de marzo de 2027.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este cambio solo se aplica a los env\u00edos por SMTP. Esto es lo que cambia y c\u00f3mo actualizar.\u00a0<\/p>\n\n\n\r\n    <nav data-content-type=\"longform\" class=\"toc-block longform-spacings px-5 py-6 px-md-6 px-lg-7 py-md-7 bg-light fs-sm rounded-lg\" aria-labelledby=\"toc-title-6105\"><p class=\"h5 m-0\" id=\"toc-title-6105\">\u00cdndice<\/p><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">01<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#que-ocurre-si-no-actualizo-tls\">\u00bfQu\u00e9 ocurre si no actualizo TLS?\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">02<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#localiza-todo-lo-que-envia-a-traves-de-smtp\">Localiza todo lo que env\u00eda a trav\u00e9s de SMTP\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">03<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#comprueba-tu-entorno\">Comprueba tu entorno\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">04<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#python-smtplib\">Python (smtplib)\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">05<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#node-js-nodemailer\">Node.js (Nodemailer)\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">06<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#net-framework\">.NET Framework\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">07<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#relay-de-postfix\">Relay de Postfix\u00a0<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">08<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#en-resumen\">En resumen<\/a><\/div><\/div><\/nav>\n\n\n<h1 class=\"wp-block-heading\">\u00bfQu\u00e9 cambia en Mailgun?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A partir del 1 de marzo de 2027, el SMTP de Mailgun solo aceptar\u00e1 conexiones a trav\u00e9s de TLS 1.2 o superior. Las conexiones que utilicen TLS 1.0 o 1.1 se rechazar\u00e1n y esos mensajes no se enviar\u00e1n.\u00a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u00bfPor qu\u00e9 Mailgun va a retirar TLS 1.0 y 1.1?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">TLS 1.0 se remonta a 1999. Tanto 1.0 como 1.1 tienen vulnerabilidades conocidas que hicieron que los principales navegadores dejaran de usar estos protocolos en 2020, y que el IETF los declarara formalmente obsoletos en 2021 (RFC 8996). Enviar mensajes a trav\u00e9s de estos protocolos\u00a0pone en riesgo tus mensajes y tus credenciales SMTP durante la transmisi\u00f3n.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Exigir TLS 1.2 o superior protege a todos los remitentes de la plataforma, no solo a los que ya han hecho el cambio.\u00a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u00bfTe afecta este cambio?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Los remitentes que env\u00edan a Mailgun por SMTP y cuyo servidor de email, aplicaci\u00f3n o biblioteca de email negocia TLS 1.0 o 1.1. se ver\u00e1n afectados. Los remitentes que solo env\u00edan a trav\u00e9s de la API de Mailgun no necesitan hacer ninguna actualizaci\u00f3n.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mailgun hace un seguimiento del tr\u00e1fico SMTP para detectar versiones antiguas de TLS. Si Mailgun detecta un TLS antiguo en tu cuenta, los administradores recibir\u00e1n un email y ver\u00e1n un banner en el panel de control de su cuenta de Mailgun. \u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Entornos antiguos que se sabe que afectan a TLS:\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Windows Server 2008 o 2012, donde TLS 1.2 no est\u00e1 activado por defecto\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>.NET Framework 4.5 o anterior\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Versiones obsoletas de OpenSSL, o aplicaciones y plugins heredados que fijan una versi\u00f3n antigua de TLS\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Te recomendamos que pases a TLS 1.2 o superior lo antes posible. Para la mayor\u00eda de los clientes, esto implica actualizar un ajuste en el servidor de email, aplicaci\u00f3n o biblioteca de email que utilicen para conectarse a Mailgun. \u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfQu\u00e9 ocurre si no actualizo TLS?\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tras la fecha l\u00edmite del 1 de marzo, Mailgun no podr\u00e1 aceptar conexiones SMTP que utilicen TLS 1.0 o 1.1, lo que afectar\u00e1 a los mensajes que intentes enviar.\u00a0<strong>Eso incluye los emails con los que cuentan tus clientes, como los restablecimientos de contrase\u00f1a y los recibos.\u00a0<\/strong><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">C\u00f3mo actualizar a TLS 1.2\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Sigue estos pasos para asegurarte de que has actualizado.\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Localiza todo lo que env\u00eda a trav\u00e9s de SMTP\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Muchos equipos tienen m\u00e1s de una aplicaci\u00f3n que env\u00eda a trav\u00e9s de la misma cuenta de Mailgun. Revisa todas las aplicaciones e instancias donde aparezcan tus credenciales SMTP de Mailgun o smtp.mailgun.org:\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tus propias aplicaciones y servicios, incluidos entornos de pruebas y trabajadores en segundo plano\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Servidores de email o relays, como Postfix, que reenv\u00edan emails a Mailgun\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plugins de CMS, plataformas de ecommerce y otras herramientas configuradas con tu inicio de sesi\u00f3n SMTP\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sistemas de proveedores o heredados, como CRM, ERP, esc\u00e1neres o herramientas de monitorizaci\u00f3n, que env\u00edan alertas\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Comprueba tu entorno\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En el siguiente ejemplo de curl, ver\u00e1s el chat SMTP para verificar qu\u00e9 versi\u00f3n de TLS est\u00e1s utilizando actualmente: \u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>openssl s_client -connect smtp.mailgun.org:587 -starttls smtp -tls1_2\u00a0<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una negociaci\u00f3n exitosa imprime la cadena de certificados y \u00abProtocol : TLSv1.2\u00bb o superior.\u00a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u00bfC\u00f3mo s\u00e9 que lo he solucionado?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Utiliza los siguientes ejemplos de c\u00f3digo para validar que tu servicio ejecuta TLS 1.2 o posterior al conectarse a Mailgun para el env\u00edo de mensajes a trav\u00e9s de SMTP. \u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Python (smtplib)\u00a0<\/h2>\n\n\n    <div data-content-type=\"longform\" class=\"code-snippet longform-spacings rounded-lg overflow-hidden shadow \" data-count=\"1\">\r\n        <ul class=\"nav nav-buttons code-snippet__tabs longform-except position-relative d-flex gap-2 flex-wrap p-3\" role=\"tablist\">\r\n\r\n                            \r\n                    \r\n                        <li class=\"nav-item\" role=\"presentation\">\r\n                            <button class=\"nav-link active\" data-bs-toggle=\"tab\" data-bs-target=\"#block-f6d04876a477c2451b0ceb329ae90a8e_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-f6d04876a477c2451b0ceb329ae90a8e_code_0\" aria-selected=\"true\">\r\n                                Python                            <\/button>\r\n                        <\/li>\r\n\r\n                    \r\n                            \r\n        <\/ul>\r\n        <div class=\"code-snippet__tab-content tab-content\">\r\n\r\n                            \r\n                    <div class=\"tab-pane show active\" id=\"block-f6d04876a477c2451b0ceb329ae90a8e_code_0\" role=\"tabpanel\" aria-labelledby=\"block-f6d04876a477c2451b0ceb329ae90a8e_code_0\">\r\n                        <div class=\"code-snippet__code-wrapper\">\r\n                            <div class=\"nav nav-buttons code-snippet__copy-wrapper\">\r\n                                <button type=\"button\" class=\"nav-link code-snippet__copy\" data-clipboard-target=\"#block-f6d04876a477c2451b0ceb329ae90a8e_code_0_content\" data-clipboard-label=\"Copia al portapapeles\" data-clipboard-success-label=\"\u00a1Copiado!\" data-clipboard-error-label=\"No se ha podido copiar\" data-tooltip=\"Copia al portapapeles\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copia al portapapeles\">\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--default\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/file-stack.svg\"><\/svg>\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--success\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/badge-check.svg\"><\/svg>\r\n                                <\/button>\r\n                            <\/div>\r\n                                                        <pre class=\"w-100 h-100 m-0 line-numbers language-Python\" tabindex=\"0\">\r\n                                <code id=\"block-f6d04876a477c2451b0ceb329ae90a8e_code_0_content\" class=\"language-Python\">\r\n\r\n                                    \r\nimport smtplib, ssl \r\n\r\ncontext = ssl.create_default_context() \r\n\r\ncontext.minimum_version = ssl.TLSVersion.TLSv1_2 \r\n\r\n  \r\n\r\nwith smtplib.SMTP(&quot;smtp.mailgun.org&quot;, 587) as server: \r\n\r\n    server.starttls(context=context) \r\n\r\n    server.login(SMTP_USER, SMTP_PASSWORD) \r\n                                <\/code>\r\n                            <\/pre>\r\n                        <\/div>\r\n                    <\/div>\r\n                                    <\/div>\r\n    <\/div>\r\n\n\n\n<h2 class=\"wp-block-heading\">Node.js (Nodemailer)\u00a0<\/h2>\n\n\n    <div data-content-type=\"longform\" class=\"code-snippet longform-spacings rounded-lg overflow-hidden shadow \" data-count=\"1\">\r\n        <ul class=\"nav nav-buttons code-snippet__tabs longform-except position-relative d-flex gap-2 flex-wrap p-3\" role=\"tablist\">\r\n\r\n                            \r\n                    \r\n                        <li class=\"nav-item\" role=\"presentation\">\r\n                            <button class=\"nav-link active\" data-bs-toggle=\"tab\" data-bs-target=\"#block-399cb8c79f056ef11746db2a6aefd61e_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-399cb8c79f056ef11746db2a6aefd61e_code_0\" aria-selected=\"true\">\r\n                                Javascript                            <\/button>\r\n                        <\/li>\r\n\r\n                    \r\n                            \r\n        <\/ul>\r\n        <div class=\"code-snippet__tab-content tab-content\">\r\n\r\n                            \r\n                    <div class=\"tab-pane show active\" id=\"block-399cb8c79f056ef11746db2a6aefd61e_code_0\" role=\"tabpanel\" aria-labelledby=\"block-399cb8c79f056ef11746db2a6aefd61e_code_0\">\r\n                        <div class=\"code-snippet__code-wrapper\">\r\n                            <div class=\"nav nav-buttons code-snippet__copy-wrapper\">\r\n                                <button type=\"button\" class=\"nav-link code-snippet__copy\" data-clipboard-target=\"#block-399cb8c79f056ef11746db2a6aefd61e_code_0_content\" data-clipboard-label=\"Copia al portapapeles\" data-clipboard-success-label=\"\u00a1Copiado!\" data-clipboard-error-label=\"No se ha podido copiar\" data-tooltip=\"Copia al portapapeles\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copia al portapapeles\">\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--default\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/file-stack.svg\"><\/svg>\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--success\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/badge-check.svg\"><\/svg>\r\n                                <\/button>\r\n                            <\/div>\r\n                                                        <pre class=\"w-100 h-100 m-0 line-numbers language-Javascript\" tabindex=\"0\">\r\n                                <code id=\"block-399cb8c79f056ef11746db2a6aefd61e_code_0_content\" class=\"language-Javascript\">\r\n\r\n                                    \r\nconst transporter = nodemailer.createTransport({ \r\n\r\n  host: &quot;smtp.mailgun.org&quot;, \r\n\r\n  port: 587, \r\n\r\n  auth: { user: SMTP_USER, pass: SMTP_PASSWORD }, \r\n\r\n  tls: { minVersion: &quot;TLSv1.2&quot; }, \r\n\r\n}); \r\n                                <\/code>\r\n                            <\/pre>\r\n                        <\/div>\r\n                    <\/div>\r\n                                    <\/div>\r\n    <\/div>\r\n\n\n\n<h2 class=\"wp-block-heading\">.NET Framework\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En .NET 4.5, a\u00f1ade esta l\u00ednea antes de conectarte. La versi\u00f3n 4.6 y las posteriores utilizan TLS 1.2 por defecto.\u00a0<\/p>\n\n\n    <div data-content-type=\"longform\" class=\"code-snippet longform-spacings rounded-lg overflow-hidden shadow \" data-count=\"1\">\r\n        <ul class=\"nav nav-buttons code-snippet__tabs longform-except position-relative d-flex gap-2 flex-wrap p-3\" role=\"tablist\">\r\n\r\n                            \r\n                    \r\n                        <li class=\"nav-item\" role=\"presentation\">\r\n                            <button class=\"nav-link active\" data-bs-toggle=\"tab\" data-bs-target=\"#block-1a7245f1fce137768051616776f5106e_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-1a7245f1fce137768051616776f5106e_code_0\" aria-selected=\"true\">\r\n                                C#                            <\/button>\r\n                        <\/li>\r\n\r\n                    \r\n                            \r\n        <\/ul>\r\n        <div class=\"code-snippet__tab-content tab-content\">\r\n\r\n                            \r\n                    <div class=\"tab-pane show active\" id=\"block-1a7245f1fce137768051616776f5106e_code_0\" role=\"tabpanel\" aria-labelledby=\"block-1a7245f1fce137768051616776f5106e_code_0\">\r\n                        <div class=\"code-snippet__code-wrapper\">\r\n                            <div class=\"nav nav-buttons code-snippet__copy-wrapper\">\r\n                                <button type=\"button\" class=\"nav-link code-snippet__copy\" data-clipboard-target=\"#block-1a7245f1fce137768051616776f5106e_code_0_content\" data-clipboard-label=\"Copia al portapapeles\" data-clipboard-success-label=\"\u00a1Copiado!\" data-clipboard-error-label=\"No se ha podido copiar\" data-tooltip=\"Copia al portapapeles\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copia al portapapeles\">\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--default\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/file-stack.svg\"><\/svg>\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--success\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/badge-check.svg\"><\/svg>\r\n                                <\/button>\r\n                            <\/div>\r\n                                                        <pre class=\"w-100 h-100 m-0 line-numbers language-csharp\" tabindex=\"0\">\r\n                                <code id=\"block-1a7245f1fce137768051616776f5106e_code_0_content\" class=\"language-csharp\">\r\n\r\n                                    \r\nSystem.Net.ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12; \r\n                                <\/code>\r\n                            <\/pre>\r\n                        <\/div>\r\n                    <\/div>\r\n                                    <\/div>\r\n    <\/div>\r\n\n\n\n<h2 class=\"wp-block-heading\">Relay de Postfix\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si Postfix reenv\u00eda tus emails a Mailgun, establece el protocolo m\u00ednimo en main.cf (Postfix 3.6 o posterior), y luego recarga Postfix:\u00a0<\/p>\n\n\n    <div data-content-type=\"longform\" class=\"code-snippet longform-spacings rounded-lg overflow-hidden shadow \" data-count=\"1\">\r\n        <ul class=\"nav nav-buttons code-snippet__tabs longform-except position-relative d-flex gap-2 flex-wrap p-3\" role=\"tablist\">\r\n\r\n                            \r\n                    \r\n                        <li class=\"nav-item\" role=\"presentation\">\r\n                            <button class=\"nav-link active\" data-bs-toggle=\"tab\" data-bs-target=\"#block-f1ca93281cc036e109dba1386067c8bc_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-f1ca93281cc036e109dba1386067c8bc_code_0\" aria-selected=\"true\">\r\n                                C#                            <\/button>\r\n                        <\/li>\r\n\r\n                    \r\n                            \r\n        <\/ul>\r\n        <div class=\"code-snippet__tab-content tab-content\">\r\n\r\n                            \r\n                    <div class=\"tab-pane show active\" id=\"block-f1ca93281cc036e109dba1386067c8bc_code_0\" role=\"tabpanel\" aria-labelledby=\"block-f1ca93281cc036e109dba1386067c8bc_code_0\">\r\n                        <div class=\"code-snippet__code-wrapper\">\r\n                            <div class=\"nav nav-buttons code-snippet__copy-wrapper\">\r\n                                <button type=\"button\" class=\"nav-link code-snippet__copy\" data-clipboard-target=\"#block-f1ca93281cc036e109dba1386067c8bc_code_0_content\" data-clipboard-label=\"Copia al portapapeles\" data-clipboard-success-label=\"\u00a1Copiado!\" data-clipboard-error-label=\"No se ha podido copiar\" data-tooltip=\"Copia al portapapeles\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copia al portapapeles\">\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--default\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/file-stack.svg\"><\/svg>\r\n                                    <svg class=\"code-snippet__copy-icon code-snippet__copy-icon--success\" width=\"24\" height=\"24\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/badge-check.svg\"><\/svg>\r\n                                <\/button>\r\n                            <\/div>\r\n                                                        <pre class=\"w-100 h-100 m-0 line-numbers language-csharp\" tabindex=\"0\">\r\n                                <code id=\"block-f1ca93281cc036e109dba1386067c8bc_code_0_content\" class=\"language-csharp\">\r\n\r\n                                    \r\nsmtp_tls_protocols = &gt;=TLSv1.2\u00a0\r\n\r\nsmtp_tls_mandatory_protocols = &gt;=TLSv1.2\r\n                                <\/code>\r\n                            <\/pre>\r\n                        <\/div>\r\n                    <\/div>\r\n                                    <\/div>\r\n    <\/div>\r\n\n\n    <div data-content-type=\"longform\"  class=\"callout text-body-color px-5 py-6 px-md-6 px-lg-7 py-md-7 longform-spacings rounded-lg bg-light\" data-theme=\"light\">\r\n\r\n        <div class=\"content-body\"> <p class=\"mb-0\"><b>Consejo pro:<\/b>\u00a0\u00bfQuieres TLS en el otro tramo del viaje tambi\u00e9n? A\u00f1ade el encabezado X-Mailgun-Require-TLS y Mailgun solo enviar\u00e1 tu mensaje al servidor del destinatario a trav\u00e9s de una conexi\u00f3n segura.<br><\/p><\/div>\r\n    <\/div>\r\n\n\n\n<h2 class=\"wp-block-heading\">En resumen<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Recuerda que todos tus cambios y actualizaciones deben completarse antes del 1 de marzo de 2027. Nuestro equipo de asistencia est\u00e1 disponible para ayudarte a asegurar que tus cuentas est\u00e1n listas para enviar con TLS 1.2<\/p>\n\n\n\r\n    <aside data-content-type=\"longform\"  class=\"banner-block longform-spacings rounded-lg shadow-lg px-5 py-6 px-md-6 py-md-7 p-lg-7 bg-light\" data-theme=\"dark\"  aria-labelledby=\"banner-block-block-6c81b0155a53b2017281caabd55e1e29\">\r\n                    <p class=\"text-uppercase section-caption text-body-color\">\r\n                Asistencia            <\/p>\r\n                            <p class=\"h4 text-accent fw-bold\" id=\"banner-block-block-6c81b0155a53b2017281caabd55e1e29\">\r\n                Estamos aqu\u00ed para ayudarte            <\/p>\r\n                            <div class=\"mb-0 text-body-color\">\r\n                                    <div class=\"content-body mb-0 text-body-color\"><p class=\"mb-0\">Nuestro equipo de Asistencia est\u00e1 listo para ayudarte con cualquier problema que puedas experimentar con tus campa\u00f1as de email, env\u00edos, entregabilidad y mucho m\u00e1s.<\/p><\/div>\r\n                            <\/div>\r\n        \r\n        <div class=\"text-start mt-5\"><a href=\"https:\/\/www.mailgun.com\/es\/contacto\/asistencia\/\"  class=\"btn btn-secondary\" >Contact Support<\/a><\/div>\r\n    <\/aside>\r\n\r\n","protected":false},"excerpt":{"rendered":"<p>A partir del 1 de marzo de 2027, Mailgun rechazar\u00e1 las conexiones SMTP que utilicen TLS 1.0 o 1.1. Si tu aplicaci\u00f3n env\u00eda emails a Mailgun por SMTP, aqu\u00ed te explicamos c\u00f3mo comprobar tu versi\u00f3n de TLS y actualizarla antes de que tus mensajes dejen de enviarse.<\/p>\n","protected":false},"author":13,"featured_media":13407,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[22],"class_list":["post-26712","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-product"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fin de soporte de TLS en el SMTP de Mailgun: p\u00e1sate a TLS 1.2 antes del 1 de marzo<\/title>\n<meta name=\"description\" content=\"El SMTP de Mailgun requerir\u00e1 TLS 1.2 o superior a partir del 1 de marzo de 2027. 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