{"id":26714,"date":"2026-11-09T15:10:32","date_gmt":"2026-11-09T15:10:32","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/mailgun-smtp-migracao-tls-1-2-o-que-fazer-antes-atualizacao-1-marco-2027\/"},"modified":"2026-11-09T17:19:09","modified_gmt":"2026-11-09T17:19:09","slug":"mailgun-smtp-migracao-tls-1-2-o-que-fazer-antes-atualizacao-1-marco-2027","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/pt\/blog\/product\/mailgun-smtp-migracao-tls-1-2-o-que-fazer-antes-atualizacao-1-marco-2027\/","title":{"rendered":"O SMTP do Mailgun est\u00e1 mudando para o TLS 1.2: o que voc\u00ea precisa fazer antes da atualiza\u00e7\u00e3o de 1\u00ba de mar\u00e7o de 2027"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Se o aplicativo envia redefini\u00e7\u00f5es de senha, recibos, c\u00f3digos de login ou outros envios de mensagens transacionais com o Mailgun via SMTP usando uma vers\u00e3o antiga do TLS, o Mailgun n\u00e3o poder\u00e1 aceit\u00e1-los a partir de 1\u00ba de mar\u00e7o de 2027.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Essa mudan\u00e7a se aplica apenas ao envio via SMTP. Veja o que vai mudar e como se atualizar.\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-8259\"><p class=\"h5 m-0\" id=\"toc-title-8259\">\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=\"#o-que-acontece-se-eu-nao-atualizar-o-tls\">O que acontece se eu n\u00e3o atualizar o 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=\"#encontre-tudo-que-faz-envios-via-smtp\">Encontre tudo que faz envios via 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=\"#verifique-o-ambiente\">Verifique o ambiente\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-do-postfix\">Relay do 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=\"#conclusao\">Conclus\u00e3o<\/a><\/div><\/div><\/nav>\n\n\n<h1 class=\"wp-block-heading\">O que vai mudar no Mailgun?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A partir de 1\u00ba de mar\u00e7o de 2027, o SMTP do Mailgun s\u00f3 aceitar\u00e1 conex\u00f5es usando o TLS 1.2 ou superior. As conex\u00f5es que usarem o TLS 1.0 ou 1.1 ser\u00e3o rejeitadas e essas mensagens n\u00e3o ser\u00e3o enviadas.\u00a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Por que o Mailgun vai descontinuar o TLS 1.0 e 1.1?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">O TLS 1.0 foi criado em 1999. Tanto a vers\u00e3o 1.0 quanto a 1.1 t\u00eam falhas conhecidas que fizeram com que os principais navegadores abandonassem esses protocolos em 2020, e a IETF os descontinuasse formalmente em 2021 (RFC 8996). O envio por meio desses protocolos\u00a0coloca as mensagens e credenciais SMTP em risco durante a transmiss\u00e3o.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Exigir o TLS 1.2 ou superior protege todos os remetentes da plataforma, n\u00e3o apenas os que j\u00e1 fizeram a transi\u00e7\u00e3o.\u00a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Essa mudan\u00e7a afeta voc\u00ea?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Remetentes que fazem envios para o Mailgun via SMTP e cujo servidor de e-mail, aplicativo ou biblioteca de e-mail negocia o TLS 1.0 ou 1.1. ser\u00e3o afetados. Os remetentes que fazem envios apenas por meio da API do Mailgun n\u00e3o precisam fazer nenhuma atualiza\u00e7\u00e3o.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O Mailgun monitora o tr\u00e1fego SMTP em busca de vers\u00f5es antigas do TLS. Se o Mailgun detectar uma vers\u00e3o antiga do TLS na conta, os administradores receber\u00e3o um e-mail e ver\u00e3o um banner no painel da conta do Mailgun. \u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ambientes antigos que costumam afetar o TLS:\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Windows Server 2008 ou 2012, em que o TLS 1.2 n\u00e3o \u00e9 ativado por padr\u00e3o\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>.NET Framework 4.5 ou anterior\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vers\u00f5es desatualizadas do OpenSSL, ou aplicativos e plugins legados que fixam uma vers\u00e3o antiga do TLS\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Recomendamos que voc\u00ea mude para o TLS 1.2 ou superior o mais r\u00e1pido poss\u00edvel. Para a maioria dos clientes, isso significa atualizar uma configura\u00e7\u00e3o no servidor de e-mail, aplicativo ou biblioteca de e-mail que voc\u00ea usa para se conectar ao Mailgun. \u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O que acontece se eu n\u00e3o atualizar o TLS?\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ap\u00f3s o prazo final de 1\u00ba de mar\u00e7o, o Mailgun n\u00e3o poder\u00e1 aceitar conex\u00f5es SMTP usando TLS 1.0 ou 1.1, o que afetar\u00e1 as mensagens que voc\u00ea tentar enviar.\u00a0<strong>Isso inclui os e-mails com os quais seus clientes contam, como redefini\u00e7\u00f5es de senha e recibos.\u00a0<\/strong><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Como atualizar para o TLS 1.2\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Siga as etapas abaixo para se certificar de que tudo est\u00e1 atualizado.\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Encontre tudo que faz envios via SMTP\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Muitas equipes t\u00eam mais de um aplicativo fazendo envios por meio da mesma conta do Mailgun. Verifique todos os aplicativos e inst\u00e2ncias em que as credenciais SMTP do Mailgun ou smtp.mailgun.org aparecem:\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Seus pr\u00f3prios aplicativos e servi\u00e7os, incluindo ambientes de staging e workers em segundo plano\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Servidores ou relays de e-mail, como o Postfix, que encaminham e-mails para o Mailgun\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plugins de CMS, plataformas de e-commerce e outras ferramentas configuradas com o login SMTP\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sistemas de fornecedores ou legados, como CRMs, ERPs, scanners ou ferramentas de monitoramento, que enviam alertas\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Verifique o ambiente\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No exemplo de curl abaixo, voc\u00ea ver\u00e1 o chat SMTP para verificar qual vers\u00e3o do TLS est\u00e1 usando no momento: \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\">Um handshake bem-sucedido exibe a cadeia de certificados e &#8220;Protocol : TLSv1.2&#8221; ou superior.\u00a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Como sei que o problema foi resolvido?\u00a0<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Use os exemplos de c\u00f3digo abaixo para validar se o servi\u00e7o est\u00e1 rodando o TLS 1.2 ou superior ao se conectar ao Mailgun para enviar mensagens via 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-7dee7b8bf4f44a798284d0adaec533e9_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-7dee7b8bf4f44a798284d0adaec533e9_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-7dee7b8bf4f44a798284d0adaec533e9_code_0\" role=\"tabpanel\" aria-labelledby=\"block-7dee7b8bf4f44a798284d0adaec533e9_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-7dee7b8bf4f44a798284d0adaec533e9_code_0_content\" data-clipboard-label=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-clipboard-success-label=\"Copiado!\" data-clipboard-error-label=\"N\u00e3o foi poss\u00edvel copiar\" data-tooltip=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copiar para a \u00e1rea de transfer\u00eancia\">\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-7dee7b8bf4f44a798284d0adaec533e9_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-0393063a57737087cdd243bdb5e3b546_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-0393063a57737087cdd243bdb5e3b546_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-0393063a57737087cdd243bdb5e3b546_code_0\" role=\"tabpanel\" aria-labelledby=\"block-0393063a57737087cdd243bdb5e3b546_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-0393063a57737087cdd243bdb5e3b546_code_0_content\" data-clipboard-label=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-clipboard-success-label=\"Copiado!\" data-clipboard-error-label=\"N\u00e3o foi poss\u00edvel copiar\" data-tooltip=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copiar para a \u00e1rea de transfer\u00eancia\">\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-0393063a57737087cdd243bdb5e3b546_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\">No .NET 4.5, adicione esta linha antes de se conectar. A vers\u00e3o 4.6 e posteriores usam o TLS 1.2 por padr\u00e3o.\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-0c1c262199ffe44e28f8e9d355f3f7b9_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-0c1c262199ffe44e28f8e9d355f3f7b9_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-0c1c262199ffe44e28f8e9d355f3f7b9_code_0\" role=\"tabpanel\" aria-labelledby=\"block-0c1c262199ffe44e28f8e9d355f3f7b9_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-0c1c262199ffe44e28f8e9d355f3f7b9_code_0_content\" data-clipboard-label=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-clipboard-success-label=\"Copiado!\" data-clipboard-error-label=\"N\u00e3o foi poss\u00edvel copiar\" data-tooltip=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copiar para a \u00e1rea de transfer\u00eancia\">\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-0c1c262199ffe44e28f8e9d355f3f7b9_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 do Postfix\u00a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Se o Postfix faz o relay do e-mail para o Mailgun, defina o protocolo m\u00ednimo no main.cf (Postfix 3.6 ou superior) e, em seguida, recarregue o 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-29900b09cb95f8d6e0309b163df4c04a_code_0\" type=\"button\" role=\"tab\" aria-controls=\"block-29900b09cb95f8d6e0309b163df4c04a_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-29900b09cb95f8d6e0309b163df4c04a_code_0\" role=\"tabpanel\" aria-labelledby=\"block-29900b09cb95f8d6e0309b163df4c04a_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-29900b09cb95f8d6e0309b163df4c04a_code_0_content\" data-clipboard-label=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-clipboard-success-label=\"Copiado!\" data-clipboard-error-label=\"N\u00e3o foi poss\u00edvel copiar\" data-tooltip=\"Copiar para a \u00e1rea de transfer\u00eancia\" data-tooltip-placement=\"left\" role=\"tooltip\" aria-label=\"Copiar para a \u00e1rea de transfer\u00eancia\">\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-29900b09cb95f8d6e0309b163df4c04a_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>Dica de especialista:<\/b>\u00a0Quer usar o TLS na outra parte do trajeto tamb\u00e9m? Adicione o cabe\u00e7alho X-Mailgun-Require-TLS e o Mailgun s\u00f3 enviar\u00e1 a mensagem para o servidor do destinat\u00e1rio por meio de uma conex\u00e3o segura.<br><\/p><\/div>\r\n    <\/div>\r\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lembre-se de que todas as altera\u00e7\u00f5es e atualiza\u00e7\u00f5es precisam ser conclu\u00eddas antes de 1\u00ba de mar\u00e7o de 2027. Nossa equipe de suporte est\u00e1 \u00e0 disposi\u00e7\u00e3o para ajudar a garantir que as contas estejam prontas para fazer envios com o 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-7f7904b905f5a3729db6abd30cc2ed7c\">\r\n                    <p class=\"text-uppercase section-caption text-body-color\">\r\n                Suporte            <\/p>\r\n                            <p class=\"h4 text-accent fw-bold\" id=\"banner-block-block-7f7904b905f5a3729db6abd30cc2ed7c\">\r\n                Estamos aqui para ajudar            <\/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\">Nossa equipe de suporte est\u00e1 aqui e pronta para ajud\u00e1-lo com qualquer problema que voc\u00ea possa ter com suas campanhas de e-mail, envios, deliverability e muito mais.<\/p><\/div>\r\n                            <\/div>\r\n        \r\n        <div class=\"text-start mt-5\"><a href=\"https:\/\/www.mailgun.com\/pt\/contato\/suporte\/\"  class=\"btn btn-secondary\" >Contact Support<\/a><\/div>\r\n    <\/aside>\r\n\r\n","protected":false},"excerpt":{"rendered":"<p>A partir de 1\u00ba de mar\u00e7o de 2027, o Mailgun rejeitar\u00e1 as conex\u00f5es SMTP que usam TLS 1.0 ou 1.1. Se o aplicativo envia e-mail para o Mailgun via SMTP, veja como verificar a vers\u00e3o do TLS e atualiz\u00e1-la antes que as mensagens parem de ser enviadas.<\/p>\n","protected":false},"author":13,"featured_media":13407,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[22],"class_list":["post-26714","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>Descontinua\u00e7\u00e3o do TLS no SMTP do Mailgun: mude para o TLS 1.2 at\u00e9 1\u00ba de mar\u00e7o<\/title>\n<meta name=\"description\" content=\"O SMTP do Mailgun exigir\u00e1 o TLS 1.2 ou superior a partir de 1\u00ba de mar\u00e7o de 2027; saiba como verificar e atualizar a vers\u00e3o do TLS.\" \/>\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.mailgun.com\/pt\/blog\/product\/mailgun-smtp-migracao-tls-1-2-o-que-fazer-antes-atualizacao-1-marco-2027\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Descontinua\u00e7\u00e3o do TLS no SMTP do Mailgun: mude para o TLS 1.2 at\u00e9 1\u00ba de mar\u00e7o\" \/>\n<meta property=\"og:description\" content=\"O SMTP do Mailgun exigir\u00e1 o TLS 1.2 ou superior a partir de 1\u00ba de mar\u00e7o de 2027; 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