{"id":64637,"date":"2015-07-22T09:02:25","date_gmt":"2015-07-22T07:02:25","guid":{"rendered":"https:\/\/blog.mailfence.com\/mailfence-implementa-spf-sender-policy-framework\/"},"modified":"2025-09-16T16:11:23","modified_gmt":"2025-09-16T14:11:23","slug":"mailfence-implementa-spf-sender-policy-framework","status":"publish","type":"post","link":"https:\/\/blog.mailfence.com\/pt\/mailfence-implementa-spf-sender-policy-framework\/","title":{"rendered":"O Mailfence agora implementa o SPF (Sender Policy Framework)"},"content":{"rendered":"\n<p><b>Sender Policy Framework<\/b>&nbsp;(<b>SPF<\/b>) \u00e9 um simples <a href=\"https:\/\/pt.wikipedia.org\/wiki\/E-mail\" target=\"_blank\" rel=\"noreferrer noopener\">email<\/a>-validation sistema projetado para detectar spoofing de e-mail, fornecendo um mecanismo para permitir o recebimento&nbsp;<a href=\"https:\/\/pt.wikipedia.org\/wiki\/MTA\" target=\"_blank\" rel=\"noreferrer noopener\">mail exchangers<\/a> para verificar se os e-mails recebidos de um dom\u00ednio v\u00eam de um host autorizado pelos administradores desse dom\u00ednio. A lista de hosts de envio autorizados para um dom\u00ednio \u00e9 publicada no <a href=\"https:\/\/pt.wikipedia.org\/wiki\/Sistema_de_Nomes_de_Dom%C3%ADnio\" target=\"_blank\" rel=\"noreferrer noopener\">Domain Name System<\/a> (DNS) registros para esse dom\u00ednio na forma de um formato especialmente formatado <a title=\"List of DNS record types\" href=\"https:\/\/en.wikipedia.org\/wiki\/List_of_DNS_record_types\" target=\"_blank\" rel=\"noopener\">TXT record<\/a>.&nbsp;<a title=\"Email spam\" href=\"https:\/\/en.wikipedia.org\/wiki\/Email_spam\" target=\"_blank\" rel=\"noopener\">Email spam<\/a> e <a href=\"https:\/\/blog.mailfence.com\/pt\/o-que-e-phishing\/\" target=\"_blank\" rel=\"noreferrer noopener\">phishing<\/a> costumam usar endere\u00e7os de remetentes forjados, portanto, publicar e verificar os registros da estrutura da pol\u00edtica do remetente pode ser considerada <a title=\"Anti-spam techniques\" href=\"https:\/\/en.wikipedia.org\/wiki\/Anti-spam_techniques\" target=\"_blank\" rel=\"noopener\">anti-spam techniques<\/a>.<\/p>\n\n\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"100849\" class=\"elementor elementor-100849 elementor-100761\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-124e1725 elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"124e1725\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-654e4e21\" data-id=\"654e4e21\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\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-3a3b1a23 elementor-widget elementor-widget-text-editor\" data-id=\"3a3b1a23\" 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><b>Mailfence &#8211; Sua su\u00edte de produtividade segura<\/b><\/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-2c004279 elementor-widget elementor-widget-text-editor\" data-id=\"2c004279\" 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><strong>Recupere sua privacidade com<\/strong><\/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-83e0dd6 elementor-icon-list--layout-inline elementor-align-center elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"83e0dd6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\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<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-envelope-open-text\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M176 216h160c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16H176c-8.84 0-16 7.16-16 16v16c0 8.84 7.16 16 16 16zm-16 80c0 8.84 7.16 16 16 16h160c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16H176c-8.84 0-16 7.16-16 16v16zm96 121.13c-16.42 0-32.84-5.06-46.86-15.19L0 250.86V464c0 26.51 21.49 48 48 48h416c26.51 0 48-21.49 48-48V250.86L302.86 401.94c-14.02 10.12-30.44 15.19-46.86 15.19zm237.61-254.18c-8.85-6.94-17.24-13.47-29.61-22.81V96c0-26.51-21.49-48-48-48h-77.55c-3.04-2.2-5.87-4.26-9.04-6.56C312.6 29.17 279.2-.35 256 0c-23.2-.35-56.59 29.17-73.41 41.44-3.17 2.3-6 4.36-9.04 6.56H96c-26.51 0-48 21.49-48 48v44.14c-12.37 9.33-20.76 15.87-29.61 22.81A47.995 47.995 0 0 0 0 200.72v10.65l96 69.35V96h320v184.72l96-69.35v-10.65c0-14.74-6.78-28.67-18.39-37.77z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Mensagens<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\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<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-calendar-alt\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M148 288h-40c-6.6 0-12-5.4-12-12v-40c0-6.6 5.4-12 12-12h40c6.6 0 12 5.4 12 12v40c0 6.6-5.4 12-12 12zm108-12v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm96 0v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm-96 96v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm-96 0v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm192 0v-40c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v40c0 6.6 5.4 12 12 12h40c6.6 0 12-5.4 12-12zm96-260v352c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V112c0-26.5 21.5-48 48-48h48V12c0-6.6 5.4-12 12-12h40c6.6 0 12 5.4 12 12v52h128V12c0-6.6 5.4-12 12-12h40c6.6 0 12 5.4 12 12v52h48c26.5 0 48 21.5 48 48zm-48 346V160H48v298c0 3.3 2.7 6 6 6h340c3.3 0 6-2.7 6-6z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Calend\u00e1rios<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\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<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-folder\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M464 128H272l-54.63-54.63c-6-6-14.14-9.37-22.63-9.37H48C21.49 64 0 85.49 0 112v288c0 26.51 21.49 48 48 48h416c26.51 0 48-21.49 48-48V176c0-26.51-21.49-48-48-48zm0 272H48V112h140.12l54.63 54.63c6 6 14.14 9.37 22.63 9.37H464v224z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Documentos<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\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<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-users-cog\" viewBox=\"0 0 640 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M610.5 341.3c2.6-14.1 2.6-28.5 0-42.6l25.8-14.9c3-1.7 4.3-5.2 3.3-8.5-6.7-21.6-18.2-41.2-33.2-57.4-2.3-2.5-6-3.1-9-1.4l-25.8 14.9c-10.9-9.3-23.4-16.5-36.9-21.3v-29.8c0-3.4-2.4-6.4-5.7-7.1-22.3-5-45-4.8-66.2 0-3.3.7-5.7 3.7-5.7 7.1v29.8c-13.5 4.8-26 12-36.9 21.3l-25.8-14.9c-2.9-1.7-6.7-1.1-9 1.4-15 16.2-26.5 35.8-33.2 57.4-1 3.3.4 6.8 3.3 8.5l25.8 14.9c-2.6 14.1-2.6 28.5 0 42.6l-25.8 14.9c-3 1.7-4.3 5.2-3.3 8.5 6.7 21.6 18.2 41.1 33.2 57.4 2.3 2.5 6 3.1 9 1.4l25.8-14.9c10.9 9.3 23.4 16.5 36.9 21.3v29.8c0 3.4 2.4 6.4 5.7 7.1 22.3 5 45 4.8 66.2 0 3.3-.7 5.7-3.7 5.7-7.1v-29.8c13.5-4.8 26-12 36.9-21.3l25.8 14.9c2.9 1.7 6.7 1.1 9-1.4 15-16.2 26.5-35.8 33.2-57.4 1-3.3-.4-6.8-3.3-8.5l-25.8-14.9zM496 368.5c-26.8 0-48.5-21.8-48.5-48.5s21.8-48.5 48.5-48.5 48.5 21.8 48.5 48.5-21.7 48.5-48.5 48.5zM96 224c35.3 0 64-28.7 64-64s-28.7-64-64-64-64 28.7-64 64 28.7 64 64 64zm224 32c1.9 0 3.7-.5 5.6-.6 8.3-21.7 20.5-42.1 36.3-59.2 7.4-8 17.9-12.6 28.9-12.6 6.9 0 13.7 1.8 19.6 5.3l7.9 4.6c.8-.5 1.6-.9 2.4-1.4 7-14.6 11.2-30.8 11.2-48 0-61.9-50.1-112-112-112S208 82.1 208 144c0 61.9 50.1 112 112 112zm105.2 194.5c-2.3-1.2-4.6-2.6-6.8-3.9-8.2 4.8-15.3 9.8-27.5 9.8-10.9 0-21.4-4.6-28.9-12.6-18.3-19.8-32.3-43.9-40.2-69.6-10.7-34.5 24.9-49.7 25.8-50.3-.1-2.6-.1-5.2 0-7.8l-7.9-4.6c-3.8-2.2-7-5-9.8-8.1-3.3.2-6.5.6-9.8.6-24.6 0-47.6-6-68.5-16h-8.3C179.6 288 128 339.6 128 403.2V432c0 26.5 21.5 48 48 48h255.4c-3.7-6-6.2-12.8-6.2-20.3v-9.2zM173.1 274.6C161.5 263.1 145.6 256 128 256H64c-35.3 0-64 28.7-64 64v32c0 17.7 14.3 32 32 32h65.9c6.3-47.4 34.9-87.3 75.2-109.4z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><b>Grupos<\/b><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\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-436babb elementor-align-center elementor-widget elementor-widget-button\" data-id=\"436babb\" data-element_type=\"widget\" data-e-type=\"widget\" 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\" href=\"https:\/\/mailfence.com\/pt\/#pricing\">\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\">Crie sua conta gratuita no Mailfence<\/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\n\n\n\n<p><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pt\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Ao publicar o registro da estrutura de pol\u00edtica do remetente, os spammers e phishers t\u00eam menos probabilidade de falsificar e-mails fingindo ser do mailfence.com, porque os e-mails falsificados t\u00eam maior probabilidade de serem pegos em filtros de spam que verificam o registro SPF.<\/span> <span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pt\" data-language-to-translate-into=\"en\" data-phrase-index=\"1\">Portanto, um dom\u00ednio protegido por SPF \u00e9 menos atraente para spammers e phishers.<\/span> <span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pt\" data-language-to-translate-into=\"en\" data-phrase-index=\"2\">Como um dom\u00ednio protegido por SPF \u00e9 menos atraente como endere\u00e7o falsificado, \u00e9 menos prov\u00e1vel que seja colocado na lista negra por filtros de spam e, em \u00faltima an\u00e1lise, \u00e9 mais prov\u00e1vel que o e-mail leg\u00edtimo do dom\u00ednio seja enviado.<\/span><\/p>\n\n\n\n<p><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pt\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">O SPF tem vantagens potenciais al\u00e9m de ajudar a identificar e-mails indesejados.<\/span> <span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pt\" data-language-to-translate-into=\"en\" data-phrase-index=\"1\">Em particular, se um remetente fornece informa\u00e7\u00f5es SPF, os destinat\u00e1rios podem usar os resultados do SPF PASS em combina\u00e7\u00e3o com uma lista branca para identificar remetentes confi\u00e1veis.<\/span> <span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pt\" data-language-to-translate-into=\"en\" data-phrase-index=\"2\">Cen\u00e1rios como sistemas comprometidos e envio de mala direta compartilhada limitam esse uso.<\/span><\/p>\n\n\n\n<p>O <a href=\"https:\/\/en.wikipedia.org\/wiki\/Simple_Mail_Transfer_Protocol\">Simple Mail Transfer Protocol<\/a> permite que qualquer computador envie e-mails que alegam ser de qualquer endere\u00e7o de origem. Isso \u00e9 explorado por remetentes de <a href=\"https:\/\/en.wikipedia.org\/wiki\/E-mail_spam\">spam<\/a> que costumam usar endere\u00e7os de <a href=\"https:\/\/en.wikipedia.org\/wiki\/Email_address\">e-mail forjados<\/a>, dificultando o rastreamento de uma mensagem de volta ao remetente e facilitando que os remetentes de spam ocultem sua identidade para evitar responsabilidade. Ele tamb\u00e9m \u00e9 usado em t\u00e9cnicas de<a href=\"https:\/\/blog.mailfence.com\/pt\/o-que-e-phishing\/\"> phishing<\/a>, nas quais os usu\u00e1rios podem ser levados a divulgar informa\u00e7\u00f5es privadas em resposta a um e-mail supostamente enviado por uma organiza\u00e7\u00e3o, como um banco.<\/p>\n\n\n\n<p>O SPF permite que o propriet\u00e1rio de um dom\u00ednio da Internet especifique quais computadores est\u00e3o autorizados a enviar e-mails com endere\u00e7os de remetentes nesse dom\u00ednio, usando <span style=\"color: #000000;\"><a href=\"https:\/\/pt.wikipedia.org\/wiki\/Sistema_de_Nomes_de_Dom%C3%ADnio\">Domain Name System<\/a><\/span> (DNS). Receptores que verificam as informa\u00e7\u00f5es do SPF em <a href=\"https:\/\/en.wikipedia.org\/wiki\/TXT_record\">registros TXT<\/a> podem rejeitar mensagens de fontes n\u00e3o autorizadas antes de receber o corpo da mensagem. Assim, os princ\u00edpios de opera\u00e7\u00e3o s\u00e3o semelhantes aos das listas de blackhole baseadas em DNS (<a href=\"https:\/\/en.wikipedia.org\/wiki\/DNSBL\">DNSBL<\/a>), exceto que o SPF usa o esquema de delega\u00e7\u00e3o de autoridade do Sistema de Nomes de Dom\u00ednio. A pr\u00e1tica atual exige o uso de registros TXT, assim como implementa\u00e7\u00f5es anteriores. Por um tempo, um novo tipo de registro (SPF, tipo 99) foi registrado e disponibilizado em um software DNS comum. O uso de registros TXT para o SPF foi planejado como um mecanismo de transi\u00e7\u00e3o no momento. A RFC experimental, <a href=\"https:\/\/tools.ietf.org\/html\/rfc4408\">RFC 4408<\/a>, se\u00e7\u00e3o 3.1.1, sugeriu que &#8220;um dom\u00ednio SPF-compat\u00edvel deve ter registros SPF de ambos os tipos RR&#8221;. O padr\u00e3o proposto, <a href=\"https:\/\/tools.ietf.org\/html\/rfc7208\">RFC 7208<\/a>, diz &#8220;Uso de tipos alternativos de RR de DNS foi suportado em experimental do SPF fase, mas foi descontinuado &#8220;.<\/p>\n\n\n\n<p>O endere\u00e7o do remetente \u00e9 transmitido no in\u00edcio da caixa de di\u00e1logo SMTP. Se o <a href=\"https:\/\/pt.wikipedia.org\/wiki\/Servidor_(computa%C3%A7%C3%A3o)\">servidor<\/a> rejeitar o remetente, o cliente n\u00e3o autorizado dever\u00e1 receber uma mensagem de rejei\u00e7\u00e3o e, se esse cliente foi um agente de transfer\u00eancia de <a href=\"https:\/\/en.wikipedia.org\/wiki\/Message_transfer_agent\">mensagens de retransmiss\u00e3o<\/a> (MTA), uma mensagem de devolu\u00e7\u00e3o para o endere\u00e7o de envio original pode ser gerada. Se o servidor aceitar o remetente e posteriormente tamb\u00e9m aceitar os destinat\u00e1rios e o corpo da mensagem, ele dever\u00e1 inserir um campo Return-Path no cabe\u00e7alho da mensagem para salvar o endere\u00e7o do remetente. Embora o endere\u00e7o no Caminho de Retorno geralmente corresponda a outros endere\u00e7os de originador no cabe\u00e7alho de correio, como De ou Remetente, isso n\u00e3o \u00e9 necessariamente o caso, e o SPF n\u00e3o impede a falsifica\u00e7\u00e3o desses outros endere\u00e7os.<\/p>\n\n\n\n<p>Os spammers podem enviar e-mails com um resultado SPF PASS se tiverem uma conta em um dom\u00ednio com uma pol\u00edtica de remetente ou abusarem de um sistema comprometido nesse dom\u00ednio. No entanto, isso faz com que o spammer seja mais f\u00e1cil de rastrear.<\/p>\n\n\n\n<p>O principal benef\u00edcio da estrutura de diretiva do remetente (SPF) \u00e9 para os propriet\u00e1rios de endere\u00e7os de email que s\u00e3o forjados no Return-Path. Eles recebem grandes quantidades de mensagens de erro n\u00e3o solicitadas e outras respostas autom\u00e1ticas. Se tais receptores usarem SPF para especificar seus endere\u00e7os IP de origem leg\u00edtimos e indicarem resultados de FAIL para todos os outros endere\u00e7os, os receptores que verifiquem SPF podem rejeitar falsifica\u00e7\u00f5es, reduzindo ou eliminando a quantidade de <span style=\"color: #000000;\"><a title=\"Backscatter (e-mail)\" href=\"https:\/\/en.wikipedia.org\/wiki\/Backscatter_%28e-mail%29\">backscatter<\/a><\/span>.<\/p>\n\n\n\n<p>O Mailfence \u00e9 uma su\u00edte de e-mail <a href=\"https:\/\/mailfence.com\/pt\/e-mail-seguro.jsp\">segura<\/a> e <a href=\"https:\/\/mailfence.com\/pt\/e-mail-privado.jsp\">privada<\/a>.<\/p>\n\n\n\n<p>Acesse a nossa <a href=\"https:\/\/mailfence.com\/pt\/imprensa.jsp\">p\u00e1gina de imprensa<\/a> para saber mais sobre a Mailfence.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sender Policy Framework&nbsp;(SPF) \u00e9 um simples email-validation sistema projetado para detectar spoofing de e-mail, fornecendo um mecanismo para permitir o recebimento&nbsp;mail exchangers para verificar se os e-mails recebidos de um dom\u00ednio v\u00eam de um host autorizado pelos administradores desse dom\u00ednio. A lista de hosts de envio autorizados para um dom\u00ednio \u00e9 publicada no Domain Name [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":85955,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18582,1379],"tags":[],"class_list":["post-64637","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias-do-mailfence","category-seguranca-de-email"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>O Mailfence agora implementa o SPF (Sender Policy Framework)<\/title>\n<meta name=\"description\" content=\"Saiba por que o Mailfence implementou o SPF (Sender Policy Framework). 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