{"id":11552,"date":"2025-07-24T13:44:00","date_gmt":"2025-07-24T13:44:00","guid":{"rendered":"https:\/\/www.hscbrasil.com.br\/?p=5046"},"modified":"2025-09-02T18:18:17","modified_gmt":"2025-09-02T18:18:17","slug":"protocolo-smtp","status":"publish","type":"post","link":"https:\/\/hsclabs.com\/pt-br\/protocolo-smtp\/","title":{"rendered":"O que \u00e9 e como funciona o protocolo SMTP"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"11552\" class=\"elementor elementor-11552\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c93549f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c93549f\" 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-50 elementor-top-column elementor-element elementor-element-fcd694f\" data-id=\"fcd694f\" 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-1a86305 elementor-widget elementor-widget-ha-post-title happy-addon ha-post-title\" data-id=\"1a86305\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"ha-post-title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"ha-post-title elementor-size-default\">O que \u00e9 e como funciona o protocolo SMTP<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1756b5e elementor-widget elementor-widget-template\" data-id=\"1756b5e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"11928\" class=\"elementor elementor-11928\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b71fdbb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b71fdbb\" 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-bbf772c\" data-id=\"bbf772c\" 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-cd4831a elementor-widget elementor-widget-post-info\" data-id=\"cd4831a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-f5a2311 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/hsclabs.com\/pt-br\/2025\/07\/24\/\">\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\t<i aria-hidden=\"true\" class=\"far fa-calendar-check\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t<span class=\"elementor-post-info__item-prefix\">Atualizado em<\/span>\n\t\t\t\t\t\t\t\t\t\t<time>24 julho  2025<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-ecb4e32 elementor-inline-item\" itemprop=\"author\">\n\t\t\t\t\t\t<a href=\"https:\/\/hsclabs.com\/pt-br\/author\/hsc-labs\/\">\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\t<i aria-hidden=\"true\" class=\"far fa-user-circle\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-author\">\n\t\t\t\t\t\t\t\t\t\tHSC Labs\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-072a961 elementor-inline-item\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"far fa-file-alt\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<a href=\"https:\/\/hsclabs.com\/pt-br\/category\/cybersecurity\/\" class=\"elementor-post-info__terms-list-item\">Cybersecurity<\/a>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\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\t\t<\/div>\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-2cf9d44 elementor-widget elementor-widget-theme-post-featured-image elementor-widget-image\" data-id=\"2cf9d44\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-featured-image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"627\" src=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2019\/03\/protocolo-SMTP.jpg\" class=\"attachment-full size-full wp-image-16578\" alt=\"\" srcset=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2019\/03\/protocolo-SMTP.jpg 1200w, https:\/\/hsclabs.com\/wp-content\/uploads\/2019\/03\/protocolo-SMTP-300x157.jpg 300w, https:\/\/hsclabs.com\/wp-content\/uploads\/2019\/03\/protocolo-SMTP-1024x535.jpg 1024w, https:\/\/hsclabs.com\/wp-content\/uploads\/2019\/03\/protocolo-SMTP-768x401.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66dbecb elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"66dbecb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\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-93679bb elementor-widget elementor-widget-text-editor\" data-id=\"93679bb\" 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 data-start=\"212\" data-end=\"549\">O envio de e-mails parece simples do ponto de vista do usu\u00e1rio: basta escrever a mensagem, digitar o endere\u00e7o do destinat\u00e1rio e clicar em &#8220;enviar&#8221;. No entanto, por tr\u00e1s dessa a\u00e7\u00e3o cotidiana existe um conjunto de protocolos que viabilizam a comunica\u00e7\u00e3o entre servidores de e-mail no mundo todo. Entre eles, o SMTP exerce um papel central.<\/p><p data-start=\"551\" data-end=\"844\">Mesmo sendo invis\u00edvel no dia a dia, o protocolo SMTP \u00e9 respons\u00e1vel por fazer com que as mensagens saiam do seu computador e cheguem ao destino correto.<\/p><p data-start=\"551\" data-end=\"844\">Neste artigo, explicamos o que \u00e9 o SMTP, como ele funciona e qual a sua import\u00e2ncia para a seguran\u00e7a e integridade da comunica\u00e7\u00e3o por e-mail.<\/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-a23394a elementor-widget elementor-widget-template\" data-id=\"a23394a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"11922\" class=\"elementor elementor-11922\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d745e8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3d745e8\" 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-82aa485\" data-id=\"82aa485\" 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-185f194 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"185f194\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;far fa-dot-circle&quot;,&quot;library&quot;:&quot;fa-regular&quot;},&quot;no_headings_message&quot;:&quot;N\\u00e3o foram encontrados cabe\\u00e7alhos nesta p\\u00e1gina.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h2 class=\"elementor-toc__header-title\">\n\t\t\t\tPrincipais t\u00f3picos deste artigo\t\t\t<\/h2>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__185f194\" aria-expanded=\"true\" aria-label=\"Abrir Tabela de Conte\u00fados\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__185f194\" aria-expanded=\"true\" aria-label=\"Fechar Tabela de Conte\u00fados\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__185f194\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\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\t\t<\/div>\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-d9db9dd elementor-widget elementor-widget-heading\" data-id=\"d9db9dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">O que s\u00e3o protocolos de mensagem (SMTP, POP3 e IMAP)\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dee4a81 elementor-widget elementor-widget-text-editor\" data-id=\"dee4a81\" 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 data-start=\"904\" data-end=\"1118\">Os <strong><a href=\"https:\/\/pt.wikipedia.org\/wiki\/Protocolo_(ci%C3%AAncia_da_computa%C3%A7%C3%A3o)\">protocolos<\/a><\/strong> de mensagem s\u00e3o conjuntos de regras que definem como os e-mails s\u00e3o enviados, recebidos e sincronizados entre diferentes dispositivos e servidores. Tr\u00eas protocolos principais comp\u00f5em esse ecossistema:<\/p><ul data-start=\"1120\" data-end=\"1503\"><li data-start=\"1120\" data-end=\"1209\"><p data-start=\"1122\" data-end=\"1209\"><strong data-start=\"1124\" data-end=\"1132\">SMTP<\/strong> (<em data-start=\"1134\" data-end=\"1165\">Simple Mail Transfer Protocol<\/em>) \u00e9 o respons\u00e1vel pelo <strong data-start=\"1188\" data-end=\"1197\">envio<\/strong> de e-mails.<\/p><\/li><li data-start=\"1210\" data-end=\"1346\"><p data-start=\"1212\" data-end=\"1346\"><a href=\"https:\/\/hsclabs.com\/pt-br\/protocolo-pop3\/\"><strong data-start=\"1214\" data-end=\"1222\">POP3<\/strong><\/a> (<em data-start=\"1224\" data-end=\"1256\">Post Office Protocol version 3<\/em>) permite o <strong data-start=\"1268\" data-end=\"1280\">download<\/strong> das mensagens para um \u00fanico dispositivo, apagando-as do servidor.<\/p><\/li><li data-start=\"1347\" data-end=\"1503\"><p data-start=\"1349\" data-end=\"1503\"><a href=\"https:\/\/hsclabs.com\/pt-br\/protocolo-imap\/\"><strong data-start=\"1351\" data-end=\"1359\">IMAP<\/strong><\/a>\u00a0(<em data-start=\"1361\" data-end=\"1395\">Internet Message Access Protocol<\/em>) mant\u00e9m os e-mails sincronizados com o servidor, permitindo o acesso simult\u00e2neo em diferentes dispositivos.<\/p><\/li><\/ul>\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-5424daa elementor-widget elementor-widget-text-editor\" data-id=\"5424daa\" 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>Cada protocolo tem uma fun\u00e7\u00e3o espec\u00edfica. Neste artigo, vamos focar no SMTP, que \u00e9 o ponto de partida de qualquer e-mail enviado.<\/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-002be7c elementor-widget elementor-widget-heading\" data-id=\"002be7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">O que \u00e9 o protocolo SMTP\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-671e067 elementor-widget elementor-widget-text-editor\" data-id=\"671e067\" 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 data-start=\"1666\" data-end=\"1862\">SMTP significa <em data-start=\"1681\" data-end=\"1712\">Simple Mail Transfer Protocol<\/em> (protocolo simples de transfer\u00eancia de correio). Trata-se do padr\u00e3o utilizado para transmitir e-mails de um remetente at\u00e9 o servidor do destinat\u00e1rio.<\/p><p data-start=\"1864\" data-end=\"2169\">De forma simplificada, o SMTP atua como uma esp\u00e9cie de \u201ctransportadora digital\u201d que coleta a mensagem na origem (como um cliente de e-mail ou servidor interno) e entrega ao servidor respons\u00e1vel pelo dom\u00ednio de destino, que posteriormente disponibilizar\u00e1 a mensagem ao destinat\u00e1rio final, via POP3 ou IMAP.<\/p><p data-start=\"2171\" data-end=\"2362\">\u00c9 importante destacar que o SMTP trata exclusivamente do <strong data-start=\"2228\" data-end=\"2237\">envio<\/strong> das mensagens. O recebimento e a leitura dos e-mails dependem de outros protocolos complementares, como vimos anteriormente.<\/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-4fd36c8 elementor-widget elementor-widget-heading\" data-id=\"4fd36c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Como o SMTP funciona\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ef8198 elementor-widget elementor-widget-text-editor\" data-id=\"5ef8198\" 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 data-start=\"2390\" data-end=\"2643\">O processo de envio via SMTP envolve uma comunica\u00e7\u00e3o direta entre o servidor de origem e o servidor de destino. Quando voc\u00ea envia um e-mail, o cliente de e-mail se conecta a um servidor SMTP e transmite a mensagem utilizando comandos padronizados, como:<\/p><ul data-start=\"2645\" data-end=\"2874\"><li data-start=\"2645\" data-end=\"2692\"><p data-start=\"2647\" data-end=\"2692\"><strong data-start=\"2647\" data-end=\"2655\">HELO<\/strong> ou <strong data-start=\"2659\" data-end=\"2667\">EHLO<\/strong>: identifica o remetente.<\/p><\/li><li data-start=\"2693\" data-end=\"2750\"><p data-start=\"2695\" data-end=\"2750\"><strong data-start=\"2695\" data-end=\"2708\">MAIL FROM<\/strong>: indica o endere\u00e7o de origem da mensagem.<\/p><\/li><li data-start=\"2751\" data-end=\"2788\"><p data-start=\"2753\" data-end=\"2788\"><strong data-start=\"2753\" data-end=\"2764\">RCPT TO<\/strong>: define o destinat\u00e1rio.<\/p><\/li><li data-start=\"2789\" data-end=\"2844\"><p data-start=\"2791\" data-end=\"2844\"><strong data-start=\"2791\" data-end=\"2799\">DATA<\/strong>: inicia a transmiss\u00e3o do conte\u00fado do e-mail.<\/p><\/li><li data-start=\"2845\" data-end=\"2874\"><p data-start=\"2847\" data-end=\"2874\"><strong data-start=\"2847\" data-end=\"2855\">QUIT<\/strong>: encerra a sess\u00e3o.<\/p><\/li><\/ul>\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-39dee2f elementor-widget elementor-widget-text-editor\" data-id=\"39dee2f\" 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 data-start=\"2876\" data-end=\"3062\">O protocolo geralmente utiliza a porta 25 para conex\u00f5es padr\u00e3o. No entanto, para garantir mais seguran\u00e7a e autentica\u00e7\u00e3o, \u00e9 comum utilizar as portas 587 (com STARTTLS) ou 465 (com SMTPS).<\/p><p data-start=\"3064\" data-end=\"3375\">O SMTP tamb\u00e9m interage com o DNS para localizar o servidor respons\u00e1vel pelo dom\u00ednio do destinat\u00e1rio, garantindo que a mensagem seja roteada corretamente. Quando um erro impede a entrega \u2014 como endere\u00e7o inexistente ou servidor indispon\u00edvel \u2014 o servidor SMTP retorna uma mensagem de erro, conhecida como <em data-start=\"3366\" data-end=\"3374\">bounce<\/em>.<\/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-5f810cf elementor-widget elementor-widget-template\" data-id=\"5f810cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"12004\" class=\"elementor elementor-12004\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section data-ha-partstyle=\"nasa\" data-ha-partcolor=\"\" data-ha-partopacity=\"0.2\" data-ha-partdirection=\"bottom\" class=\"elementor-section elementor-top-section elementor-element elementor-element-2155d94 ha-particle-yes elementor-section-boxed elementor-section-height-default elementor-section-height-default ha-particle-adv-no\" data-id=\"2155d94\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&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-50 elementor-top-column elementor-element elementor-element-3d2acae\" data-id=\"3d2acae\" 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-c1a86a1 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"c1a86a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"129\" src=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/07\/Logo-Mailinspector-02-1024x165.png\" class=\"attachment-large size-large wp-image-5485\" alt=\"\" srcset=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/07\/Logo-Mailinspector-02-1024x165.png 1024w, https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/07\/Logo-Mailinspector-02-300x48.png 300w, https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/07\/Logo-Mailinspector-02-768x124.png 768w, https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/07\/Logo-Mailinspector-02-1536x247.png 1536w, https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/07\/Logo-Mailinspector-02.png 1702w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-ce5d5b3\" data-id=\"ce5d5b3\" 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-a2b872b elementor-widget elementor-widget-heading\" data-id=\"a2b872b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Conhe\u00e7a a melhor solu\u00e7\u00e3o de <b>prote\u00e7\u00e3o de e-mail<\/b><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d7cb2a elementor-align-left elementor-widget elementor-widget-button\" data-id=\"4d7cb2a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" 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 elementor-animation-grow\" href=\"https:\/\/hsclabs.com\/pt-br\/free-trial\/\" target=\"_blank\">\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\">Agende seu free trial<\/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\t\t<\/div>\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-ed9c6a9 elementor-widget elementor-widget-heading\" data-id=\"ed9c6a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SMTP autenticado: seguran\u00e7a no envio de e-mails\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f43911 elementor-widget elementor-widget-text-editor\" data-id=\"3f43911\" 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 data-start=\"3430\" data-end=\"3715\">Antigamente, muitos servidores SMTP permitiam o envio de mensagens sem autentica\u00e7\u00e3o, o que facilitava o uso indevido por <strong><a href=\"https:\/\/hsclabs.com\/pt-br\/o-que-e-spam\/\">spammers<\/a><\/strong> e fraudadores. Hoje, a pr\u00e1tica mais segura envolve o uso de SMTP autenticado, que exige credenciais v\u00e1lidas para enviar mensagens por determinado servidor.<\/p><p data-start=\"3717\" data-end=\"3944\">Esse modelo reduz significativamente o risco de uso indevido e melhora o controle sobre o tr\u00e1fego de sa\u00edda. Al\u00e9m disso, permite aplicar regras de seguran\u00e7a e rastreabilidade, ajudando a manter a reputa\u00e7\u00e3o do dom\u00ednio da empresa.<\/p><p data-start=\"3946\" data-end=\"4203\">A autentica\u00e7\u00e3o no SMTP tamb\u00e9m est\u00e1 ligada \u00e0 ado\u00e7\u00e3o de mecanismos como <strong><a href=\"https:\/\/pt.wikipedia.org\/wiki\/Sender_Policy_Framework\">SPF<\/a><\/strong>, <a href=\"https:\/\/dkim.org\/\"><strong data-start=\"4025\" data-end=\"4033\">DKIM<\/strong><\/a> e <a href=\"https:\/\/hsclabs.com\/pt-br\/dmarc\/\"><strong data-start=\"4036\" data-end=\"4045\">DMARC<\/strong><\/a>, que confirmam se o remetente \u00e9 leg\u00edtimo e autorizam o envio em nome de determinado dom\u00ednio, bloqueando tentativas de falsifica\u00e7\u00e3o de identidade (spoofing).<\/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-1cd7083 elementor-widget elementor-widget-heading\" data-id=\"1cd7083\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SMTP e seguran\u00e7a de e-mail: o que voc\u00ea precisa saber\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-760625c elementor-widget elementor-widget-text-editor\" data-id=\"760625c\" 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 data-start=\"4263\" data-end=\"4483\">Um servidor SMTP mal configurado pode expor uma organiza\u00e7\u00e3o a s\u00e9rios riscos. Isso inclui envio de <strong><a href=\"https:\/\/hsclabs.com\/pt-br\/dicas-para-identificar-um-email-falso\/\">e-mails fraudulentos<\/a><\/strong> em nome da empresa, entrada em listas negras de spam e comprometimento da reputa\u00e7\u00e3o da marca.<\/p><p data-start=\"4485\" data-end=\"4863\">Por isso, \u00e9 fundamental garantir que o tr\u00e1fego de sa\u00edda esteja protegido. A criptografia (como o STARTTLS) protege o conte\u00fado das mensagens durante o envio, impedindo a intercepta\u00e7\u00e3o por terceiros. Al\u00e9m disso, solu\u00e7\u00f5es de seguran\u00e7a de e-mail ajudam a monitorar o comportamento das mensagens, bloqueando padr\u00f5es suspeitos e evitando que o dom\u00ednio seja usado como vetor de ataque.<\/p><p data-start=\"4865\" data-end=\"5086\">A HSC Labs atua na prote\u00e7\u00e3o da comunica\u00e7\u00e3o por e-mail desde a origem, com filtros inteligentes e autentica\u00e7\u00e3o robusta que dificultam o envio de mensagens fraudulentas, mesmo que a conta do usu\u00e1rio tenha sido comprometida.<\/p><p data-start=\"4865\" data-end=\"5086\"><a href=\"https:\/\/hsclabs.com\/pt-br\/contato\/\"><strong data-start=\"5908\" data-end=\"6014\">Entre em contato com um especialista e veja como podemos apoiar sua estrat\u00e9gia de seguran\u00e7a de e-mail.<\/strong><\/a><\/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-497c390 elementor-widget elementor-widget-template\" data-id=\"497c390\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"12009\" class=\"elementor elementor-12009\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section data-ha-partstyle=\"nasa\" data-ha-partcolor=\"\" data-ha-partopacity=\"0.4\" data-ha-partdirection=\"bottom\" class=\"elementor-section elementor-top-section elementor-element elementor-element-6f97dd3 ha-particle-yes elementor-section-boxed elementor-section-height-default elementor-section-height-default ha-particle-adv-no\" data-id=\"6f97dd3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&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-50 elementor-top-column elementor-element elementor-element-be74f27\" data-id=\"be74f27\" 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-b3233fa elementor-widget elementor-widget-heading\" data-id=\"b3233fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Veja como a HSC Labs melhorou a <b>seguran\u00e7a de e-mail<\/b> do MP-Bahia<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-541a906 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"541a906\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" 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 elementor-animation-grow\" href=\"https:\/\/hsclabs.com\/pt-br\/case-mpba-mailinspector\" target=\"_blank\">\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\">Leia o estudo de caso<\/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<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-49045f6\" data-id=\"49045f6\" 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-51a2fe2 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"51a2fe2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"401\" height=\"361\" src=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2024\/02\/case-sucesso-mailinspector-mpba.png\" class=\"attachment-large size-large wp-image-14078\" alt=\"\" srcset=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2024\/02\/case-sucesso-mailinspector-mpba.png 401w, https:\/\/hsclabs.com\/wp-content\/uploads\/2024\/02\/case-sucesso-mailinspector-mpba-300x270.png 300w\" sizes=\"(max-width: 401px) 100vw, 401px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\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\t\t<\/div>\n\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<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-ffa17f2\" data-id=\"ffa17f2\" 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-532d3bc elementor-widget elementor-widget-template\" data-id=\"532d3bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"11911\" class=\"elementor elementor-11911\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f0e534a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f0e534a\" 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-a9b195e\" data-id=\"a9b195e\" 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-861ae4f elementor-invisible elementor-widget elementor-widget-image\" data-id=\"861ae4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomInRight&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/hsclabs.com\/pt-br\/hsc-global-cyber-alliance-parceria\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/11\/selo-proud-partner-gca-black.png\" title=\"selo-proud-partner-gca-black\" alt=\"selo-proud-partner-gca-black\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-5b4e6f2 elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-invisible\" data-id=\"5b4e6f2\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;slideInRight&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-inner-column elementor-element elementor-element-4fb5e7e\" data-id=\"4fb5e7e\" 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-0008fa9 elementor-widget elementor-widget-heading\" data-id=\"0008fa9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Inscreva-se para receber not\u00edcias de cybersecurity<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d77ffec elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"d77ffec\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Form Newsletter\" aria-label=\"Form Newsletter\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"11911\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"d77ffec\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"HSC Cybersecurity\" \/>\n\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tNome\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-xs  elementor-field-textual\" placeholder=\"Nome\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-xs  elementor-field-textual\" placeholder=\"Email\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-select elementor-field-group elementor-column elementor-field-group-field_92fe65d elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_92fe65d\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tCargo\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field elementor-select-wrapper remove-before \">\n\t\t\t<div class=\"select-caret-down-wrapper\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"eicon-caret-down\"><\/i>\t\t\t<\/div>\n\t\t\t<select name=\"form_fields[field_92fe65d]\" id=\"form-field-field_92fe65d\" class=\"elementor-field-textual elementor-size-xs\" required=\"required\">\n\t\t\t\t\t\t\t\t\t<option value=\"Especialista em Ciberseguran\u00e7a\">Especialista em Ciberseguran\u00e7a<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Analista de TI\">Analista de TI<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Gerente de TI\">Gerente de TI<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"CIO ou CISO\">CIO ou CISO<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"CTO\">CTO<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Desenvolvedor ou Arquiteto\">Desenvolvedor ou Arquiteto<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"CEO ou Diretor\">CEO ou Diretor<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Profissional de Compliance\">Profissional de Compliance<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Profissional Jur\u00eddico\">Profissional Jur\u00eddico<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Profissional de Vendas \">Profissional de Vendas <\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Profissional de Marketing\">Profissional de Marketing<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Profissional de RH\">Profissional de RH<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Outro\">Outro<\/option>\n\t\t\t\t\t\t\t<\/select>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-acceptance elementor-field-group elementor-column elementor-field-group-field_3197ff8 elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_3197ff8\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tCheck\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-subgroup\">\n\t\t\t<span class=\"elementor-field-option\">\n\t\t\t\t<input type=\"checkbox\" name=\"form_fields[field_3197ff8]\" id=\"form-field-field_3197ff8\" class=\"elementor-field elementor-size-xs  elementor-acceptance-field\" required=\"required\">\n\t\t\t\t<label for=\"form-field-field_3197ff8\"><font size=\"1\"> Concordo com a <a href=\"https:\/\/hsclabs.com\/pt-br\/aviso-de-privacidade\/\">Pol\u00edtica de Privacidade<\/a> e dou o consentimento para o tratamento dos meus dados.<\/font><\/label>\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-xs elementor-animation-grow\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Enviar<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\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\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-410d8c8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"410d8c8\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;],&quot;sticky_offset&quot;:75,&quot;sticky_effects_offset&quot;:50,&quot;_ha_eqh_enable&quot;:false,&quot;sticky_anchor_link_offset&quot;:0}\">\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-11f3a71\" data-id=\"11f3a71\" 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<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-01150fe elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"01150fe\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&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-inner-column elementor-element elementor-element-46c6b70\" data-id=\"46c6b70\" 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-f2c93e3 elementor-widget elementor-widget-heading\" data-id=\"f2c93e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Bloqueie ataques que passam despercebidos por Microsoft e Google<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b35ca5 elementor-widget elementor-widget-image\" data-id=\"7b35ca5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/hsclabs.com\/pt-br\/protecao-para-microsoft-365\/\" target=\"_blank\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/11\/Microsoft-365-color.png\" title=\"Microsoft-365-color\" alt=\"Microsoft-365-color\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef354be elementor-widget elementor-widget-image\" data-id=\"ef354be\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/hsclabs.com\/pt-br\/protecao-para-google-workspace\/\" target=\"_blank\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/hsclabs.com\/wp-content\/uploads\/2023\/11\/Google-workspace-color.png\" title=\"Google-workspace-color\" alt=\"Google-workspace-color\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\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-inner-section elementor-element elementor-element-d553f0d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d553f0d\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&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-inner-column elementor-element elementor-element-628b068\" data-id=\"628b068\" 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-188fcee elementor-widget elementor-widget-spacer\" data-id=\"188fcee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\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<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-d96b708 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d96b708\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&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-inner-column elementor-element elementor-element-391d788\" data-id=\"391d788\" 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-c855e45 elementor-widget elementor-widget-heading\" data-id=\"c855e45\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Treine a sua equipe em ciberseguran\u00e7a<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2ef48b8 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"2ef48b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" 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-md elementor-animation-grow\" href=\"https:\/\/hsclabs.com\/pt-br\/mindaware\/\" target=\"_blank\">\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\">Comece Agora<\/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\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\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Saiba o que \u00e9 e como funciona o protocolo SMTP O envio de e-mails parece simples do ponto de vista do usu\u00e1rio: basta escrever a mensagem, digitar o endere\u00e7o do destinat\u00e1rio e clicar em &#8220;enviar&#8221;. No entanto, por tr\u00e1s dessa a\u00e7\u00e3o cotidiana existe um conjunto de protocolos que viabilizam a comunica\u00e7\u00e3o entre servidores de e-mail [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":16578,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-11552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>O que \u00e9 e como funciona o protocolo SMTP<\/title>\n<meta name=\"description\" content=\"Entenda o que \u00e9 e como funciona o protocolo SMTP (Simple Mail Transfer Protocol), usado no envio e recebimento de e-mails.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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