{"id":6376,"date":"2021-03-22T08:25:55","date_gmt":"2021-03-22T08:25:55","guid":{"rendered":"https:\/\/198.27.90.141\/?p=6376"},"modified":"2026-09-29T18:36:55","modified_gmt":"2026-09-29T18:36:55","slug":"dicas-para-proteger-o-seu-servidor-de-e-mail","status":"publish","type":"post","link":"https:\/\/gatefy.com\/pt-br\/blog\/dicas-para-proteger-o-seu-servidor-de-e-mail\/","title":{"rendered":"9 dicas para proteger o servidor de e-mail da sua empresa ou mail server"},"content":{"rendered":"<p>Um dos servidores que mais trabalha no data center da sua empresa \u00e9, provavelmente,\u00a0o servidor de e-mail, tamb\u00e9m chamado de mail server. O tr\u00e1fego que passa por ele \u00e9 alt\u00edssimo, o que nos leva ao desafio de manter as informa\u00e7\u00f5es e os dados pessoais e sens\u00edveis da sua empresa protegidos.<\/p>\n<p>Como sabemos, um servidor de e-mail protegido n\u00e3o \u00e9 um luxo nos dias de hoje. \u00c9 uma necessidade. Por isso, com base na\u00a0nossa experi\u00eancia trabalhando com solu\u00e7\u00f5es de prote\u00e7\u00e3o de e-mail, selecionamos 9 dicas sobre a melhor forma de proteger o seu servidor de e-mail.<\/p>\n<p>N\u00f3s, realmente, esperamos que as dicas te ajudem. Qualquer d\u00favida voc\u00ea tamb\u00e9m pode nos perguntar.<\/p>\n<h2>Como garantir a seguran\u00e7a do seu servidor de e-mails<\/h2>\n<h3>1. Configure as op\u00e7\u00f5es de Mail Relay para evitar Open Relay<\/h3>\n<p style=\"box-sizing: border-box; outline: none; margin-left: 0px; margin-right: 0px; padding: 0px; font-size: var(--font20); line-height: 1.7em; color: #000000; font-family: roboto, Helvetica, sans-serif;\">Preste aten\u00e7\u00e3o \u00e0 configura\u00e7\u00e3o do Mail Relay para que ele n\u00e3o se torne um Open Relay, o que permite que fraudadores usem o seu servidor de e-mail para enviar spam e aplicar golpes. Defina quais endere\u00e7os IP ou dom\u00ednios s\u00e3o permitidos para Mail Relay.<\/p>\n<h3>2. Implemente SPF (Sender Policy Framework)<\/h3>\n<p>Configure o\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-spf-sender-policy-framework\/\" target=\"_blank\" rel=\"noopener\">SPF (Sender Policy Framework)<\/a>. \u00c9 um registro do tipo TXT que permite determinar quais endere\u00e7os IP podem enviar e-mails do seu dom\u00ednio.<\/p>\n<h3>3. Implemente DKIM (DomainKeys Identified Mail)<\/h3>\n<p>Como o SPF, o\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-dkim-domainkeys-identified-mail\/\" target=\"_blank\" rel=\"noopener\">DKIM (DomainKeys Identified Mail)<\/a>\u00a0\u00e9 um protocolo de autentica\u00e7\u00e3o de e-mail e um registro do tipo TXT. O mecanismo DKIM \u00e9 baseado em criptografia, que valida o e-mail para que o servidor de e-mail do destinat\u00e1rio identifique o remetente. Configurando corretamente, voc\u00ea ter\u00e1 mais uma arma de prote\u00e7\u00e3o a seu favor.<\/p>\n<h3>4. Implemente DMARC (Domain-based Message Authentication Reporting &#038; Conformance)<\/h3>\n<p>O\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-dmarc\/\" target=\"_blank\" rel=\"noopener\">DMARC (Domain-based Message Authentication Reporting &amp; Conformance)\u00a0<\/a>usa os protocolos SPF e DKIM para garantir ainda mais seguran\u00e7a na autentica\u00e7\u00e3o de mensagens, fornecendo relat\u00f3rios. Dessa forma, voc\u00ea monitora o seu dom\u00ednio e melhora a prote\u00e7\u00e3o do seu servidor de e-mail.<\/p>\n<h3>5. Use DNS Reverso para bloquear remetentes maliciosos<\/h3>\n<p>O DNS Reverso (ou Reverse DNS) tamb\u00e9m \u00e9 conhecido como registro PTR. Depois de configurado, o DNS reverso verifica se o endere\u00e7o IP do remetente corresponde aos nomes do host e do dom\u00ednio.<\/p>\n<h3>6. Use DNSBL para bloquear e-mails e dom\u00ednios maliciosos<\/h3>\n<p>DNSBL (Domain Name System Blacklists), tamb\u00e9m conhecidas como DNS Blacklists, s\u00e3o listas de bloqueio de spam que permitem que voc\u00ea mantenha o seu servidor de e-mail livre de spams e amea\u00e7as. Quanto mais conex\u00f5es com DNSBL, melhor.<\/p>\n<h3>7. Use SURBL para bloquear URIs maliciosos<\/h3>\n<p>SURBL (Spam URI Real-time Black List) tamb\u00e9m \u00e9 um m\u00e9todo de detec\u00e7\u00e3o de spam, semelhante ao DNSBL. \u00c9 uma lista de URIs que em algum momento apareceram em mensagens n\u00e3o solicitadas. Se voc\u00ea tiver um filtro SURBL evita diferentes tipos de ataques.<\/p>\n<h3>8. Use uma lista negra de IP local para bloquear spammers e phishers<\/h3>\n<p>Voc\u00ea deve ter uma lista negra de IPs locais (Local IP blacklist) em seu servidor de e-mail, pois ataques direcionados, como spear-phishing, est\u00e3o em alta.<\/p>\n<h3>9. Use TLS para manter o seu e-mail confidencial<\/h3>\n<p>O TLS (Transport Layer Security) \u00e9 o seu melhor amigo\u00a0ao usar a criptografia POP3 e a autentica\u00e7\u00e3o IMAP, pois \u00e9 um protocolo\u00a0de seguran\u00e7a que autentica as\u00a0mensagens.<\/p>\n<h2>Seguran\u00e7a de e-mail<\/h2>\n<p>Se voc\u00ea tiver alguma d\u00favida sobre este assunto,\u00a0<strong><a href=\"https:\/\/gatefy.com\/pt-br\/contato\/\" target=\"_blank\" rel=\"noopener\">envie-nos uma mensagem<\/a><\/strong>. Aqui, na Gatefy, n\u00f3s desenvolvemos solu\u00e7\u00f5es baseadas em intelig\u00eancia artificial e aprendizado de m\u00e1quina que melhoram a seguran\u00e7a de e-mail da sua empresa.<\/p>\n<p>O\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/protecao-antifraude-dmarc\/\" target=\"_blank\" rel=\"noopener\"><strong>Gatefy Anti-Fraud Protection<\/strong><\/a>\u00a0\u00e9 uma solu\u00e7\u00e3o projetada para simplificar a ado\u00e7\u00e3o de DMARC, DKIM e SPF, ajudando sua empresa a combater phishing, spoofing e outros tipos de amea\u00e7as.<\/p>\n<p>O\u00a0<strong><a href=\"https:\/\/gatefy.com\/pt-br\/seguranca-email-nuvem\/\" target=\"_blank\" rel=\"noopener\">Gatefy Email Security<\/a><\/strong>\u00a0\u00e9 uma solu\u00e7\u00e3o Secure Email Gateway, projetada para bloquear spam, phishing, ransomware e outros tipos de ataques e amea\u00e7as.<\/p>\n<p>Assim, voc\u00ea garante que seu sistema de e-mail ficar\u00e1 muito mais protegido. Fale conosco ou solicite uma\u00a0<strong><a href=\"https:\/\/gatefy.com\/pt-br\/demo\/\" target=\"_blank\" rel=\"noopener\">demonstra\u00e7\u00e3o<\/a><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um dos servidores que mais trabalha no data center da sua empresa \u00e9, provavelmente,\u00a0o servidor de e-mail, tamb\u00e9m chamado de mail server. O tr\u00e1fego que passa por ele \u00e9 alt\u00edssimo, o que nos leva ao desafio de manter as informa\u00e7\u00f5es e os dados pessoais e sens\u00edveis da sua empresa protegidos. Como sabemos, um servidor de [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":6377,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,15],"tags":[],"class_list":["post-6376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-tips-advices"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>9 dicas para proteger o servidor de e-mail da sua empresa - Gatefy<\/title>\n<meta name=\"description\" content=\"Com base em nossa experi\u00eancia com solu\u00e7\u00f5es de prote\u00e7\u00e3o de e-mail, selecionamos 9 dicas sobre como proteger melhor seu servidor de e-mail.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gatefy.com\/pt-br\/blog\/dicas-para-proteger-o-seu-servidor-de-e-mail\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"9 dicas para proteger o servidor de e-mail da sua empresa - Gatefy\" \/>\n<meta property=\"og:description\" content=\"Com base em nossa experi\u00eancia com solu\u00e7\u00f5es de prote\u00e7\u00e3o de e-mail, selecionamos 9 dicas sobre como proteger melhor seu servidor de e-mail.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gatefy.com\/pt-br\/blog\/dicas-para-proteger-o-seu-servidor-de-e-mail\/\" \/>\n<meta property=\"og:site_name\" content=\"Gatefy\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/gatefy\" \/>\n<meta property=\"article:published_time\" content=\"2021-03-22T08:25:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-29T18:36:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gatefy.com\/wp-content\/uploads\/2021\/02\/seguranca-servidor-de-email.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Gatefy\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@gatefy_security\" \/>\n<meta name=\"twitter:site\" content=\"@gatefy_security\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gatefy\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gatefy.com\\\/pt-br\\\/blog\\\/dicas-para-proteger-o-seu-servidor-de-e-mail\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gatefy.com\\\/pt-br\\\/blog\\\/dicas-para-proteger-o-seu-servidor-de-e-mail\\\/\"},\"author\":{\"name\":\"Gatefy\",\"@id\":\"https:\\\/\\\/gatefy.com\\\/pt-br\\\/#\\\/schema\\\/person\\\/b305fce8ec3405a5f903af11c0b6bd94\"},\"headline\":\"9 dicas para proteger o servidor de e-mail da sua empresa ou mail server\",\"datePublished\":\"2021-03-22T08:25:55+00:00\",\"dateModified\":\"2026-09-29T18:36:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gatefy.com\\\/pt-br\\\/blog\\\/dicas-para-proteger-o-seu-servidor-de-e-mail\\\/\"},\"wordCount\":681,\"publisher\":{\"@id\":\"https:\\\/\\\/gatefy.com\\\/pt-br\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gatefy.com\\\/pt-br\\\/blog\\\/dicas-para-proteger-o-seu-servidor-de-e-mail\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gatefy.com\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/seguranca-servidor-de-email.jpg\",\"articleSection\":[\"Blog\",\"Tips &amp; 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