{"id":163289,"date":"2026-03-06T11:11:58","date_gmt":"2026-03-06T09:11:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovan-pochtovyj-server-postfix-3-11-0"},"modified":"2026-03-06T11:11:58","modified_gmt":"2026-03-06T09:11:58","slug":"opublikovan-pochtovyj-server-postfix-3-11-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/opublikovan-pochtovyj-server-postfix-3-11-0","title":{"rendered":"Publicado o servidor de e-mail Postfix 3.11.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ap\u00f3s um ano de desenvolvimento, foi lan\u00e7ado o novo ramo est\u00e1vel do servidor de e-mail Postfix \u2014 3.12.0. Ao mesmo tempo, foi anunciada a descontinua\u00e7\u00e3o do suporte ao ramo Postfix 3.7, lan\u00e7ado no in\u00edcio de 2022. O c\u00f3digo do projeto est\u00e1 escrito em C e \u00e9 distribu\u00eddo sob as licen\u00e7as EPL 2.0 (Eclipse Public License) e IPL 1.0 (IBM Public License).    <\/p>\n<p>O Postfix \u00e9 um dos raros projetos que combina alta seguran\u00e7a, confiabilidade e desempenho, o que foi alcan\u00e7ado gra\u00e7as \u00e0 sua arquitetura multiprocessada, que isola manipuladores individuais, bem como a uma rigorosa pol\u00edtica de formata\u00e7\u00e3o de c\u00f3digo e auditoria de patches. Para evitar erros de manipula\u00e7\u00e3o de mem\u00f3ria, o projeto utiliza variantes seguras de fun\u00e7\u00f5es para alocar e liberar mem\u00f3ria, assim como um conjunto de fun\u00e7\u00f5es abstratas para trabalhar com buffers (verificando o estouro do buffer e acessos \u00e0 mem\u00f3ria liberada), opera\u00e7\u00f5es com arquivos, formata\u00e7\u00e3o de sa\u00edda, entrada\/sa\u00edda bufferizada e manipula\u00e7\u00e3o de strings (incluindo capacidades para trabalhar com strings de tamanho vari\u00e1vel e ajuste autom\u00e1tico de tamanho).      <\/p>\n<p> De acordo com a pesquisa automatizada final, cerca de 500 mil servidores de email <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/\" title=\"servidores\" data-wpil-keyword-link=\"linked\">servidores<\/a> (ap\u00f3s julho de 2025, a publica\u00e7\u00e3o de relat\u00f3rios ser\u00e1 interrompida), o Postfix \u00e9 usado em 37,88% (cerca de um ano atr\u00e1s 36,81%) dos servidores de e-mail, com uma participa\u00e7\u00e3o de 55,59% para o Exim (cerca de um ano atr\u00e1s 56,61%), Sendmail \u2014 3,55% (3,60%), MailEnable \u2014 1,81% (1,82%), MDaemon \u2014 0,40% (0,40%), Microsoft Exchange \u2014 0,20% (0,19%), OpenSMTPD \u2014 0,12% (0,09%).          <\/p>\n<p>Principais novidades:  <\/p>\n<ul>\n<li class=\"l\"> Foi realizado um trabalho para simplificar a migra\u00e7\u00e3o de tabelas hash: e btree: para lmdb: ou cdb: devido \u00e0 descontinua\u00e7\u00e3o do fornecimento das bibliotecas BerkeleyDB em algumas distribui\u00e7\u00f5es do Linux. Para manter a compatibilidade com as ferramentas do Mailman, que executa o comando postmap hash:\/path\/to\/file ao adicionar ou remover listas de distribui\u00e7\u00e3o, o Postfix adicionou suporte para redirecionamento autom\u00e1tico desses comandos para as variantes com os tipos de banco de dados suportados.\n<li class=\"l\"> Por padr\u00e3o, a conex\u00e3o com servidores SMTP usando criptografia TLS est\u00e1 habilitada. Nas configura\u00e7\u00f5es do cliente SMTP, o par\u00e2metro smtp_tls_security_level \u00e9 definido como 'may' se o Postfix foi compilado com suporte a TLS. O valor 'may' permite o uso de TLS para servidores que suportam criptografia, mas tamb\u00e9m permite a queda para transmiss\u00e3o de dados sem criptografia se o servidor n\u00e3o suportar TLS.\n<li class=\"l\"> No ESMTP, foi implementado o suporte \u00e0 extens\u00e3o 'REQUIRETLS' (RFC 8689), permitindo que o remetente solicite criptografia TLS garantida em todo o percurso de entrega da mensagem. Nesse modo, qualquer servidor SMTP e LMTP envolvido no redirecionamento do e-mail deve suportar REQUIRETLS e autentica\u00e7\u00e3o rigorosa via DANE ou STS, e ao transmitir a mensagem por um conjunto de outros servidores, tamb\u00e9m deve usar REQUIRETLS.\n<li class=\"l\"> Assegurado o registro nos logs do n\u00edvel de seguran\u00e7a TLS, ou seja, se um n\u00edvel REQUIRETLS for solicitado para a entrega da mensagem, as informa\u00e7\u00f5es sobre o uso do REQUIRETLS agora ser\u00e3o salvas no log.\n<li class=\"l\">  Foi adicionado o par\u00e2metro smtp_tls_enforce_sts_mx_patterns, que inclui o modo de compatibilidade entre o cliente SMTP Postfix e os plugins MTA-STS (MTA Strict Transport Security), que exigem a habilita\u00e7\u00e3o do suporte a TLSRPT para o redirecionamento dos atributos STS. Com este par\u00e2metro ativado por padr\u00e3o, o cliente SMTP Postfix se conectar\u00e1 ao servidor MX apenas se seu nome corresponder ao padr\u00e3o especificado nas pol\u00edticas STS. Caso contr\u00e1rio, o comportamento antigo ser\u00e1 utilizado \u2014 permitindo a conex\u00e3o a servidores MX com base nos registros MX no DNS, desde que o certificado do servidor atenda \u00e0s pol\u00edticas STS. O mecanismo MTA-STS permite informar ao cliente que estabeleceu a conex\u00e3o atrav\u00e9s de um canal inseguro sobre a possibilidade e os par\u00e2metros de estabelecimento de uma conex\u00e3o TLS segura. O suporte para o par\u00e2metro tamb\u00e9m foi adicionado \u00e0s utilidades postfix-tlspol e postfix-mta-sts-resolver.\n<li class=\"l\"> Adicionada o suporte para algoritmos de criptografia resistentes a ataques em computadores qu\u00e2nticos, ao ser compilado com OpenSSL 3.5 e vers\u00f5es mais recentes.\n<li class=\"l\"> 16 par\u00e2metros de configura\u00e7\u00e3o foram descontinuados, e seu uso agora ir\u00e1 gerar um aviso no log sobre sua remo\u00e7\u00e3o em futuras vers\u00f5es. Entre os par\u00e2metros descontinuados est\u00e3o, por exemplo, 'virtual_maps', 'fallback_relay', 'postscreen_whitelist_interfaces' e 'smtpd_client_connection_limit_exceptions'.\n<li class=\"l\"> Foi adicionada a suporte para sa\u00edda de dados no formato JSON para os comandos: 'postconf -j|-jM|-jF|-jP', 'postalias -jq|-js', 'postmap -jq|-js' e 'postmulti -jl'.\n<li class=\"l\"> Melhorou o tratamento de erros nos filtros Milter que ocorrem durante o processamento de mensagens recebidas atrav\u00e9s de conex\u00f5es SMTP j\u00e1 estabelecidas h\u00e1 algum tempo. O valor do par\u00e2metro #milter_default_action foi alterado de 'tempfail' para 'shutdown', indicando que a conex\u00e3o com o cliente deve ser encerrada.        <\/ul>\n<p>Fonte: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64928\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0433\u043e\u0434\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u043d\u043e\u0432\u043e\u0439 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Postfix &#8212; 3.12.0. \u0412 \u0442\u043e \u0436\u0435 \u0432\u0440\u0435\u043c\u044f \u043e\u0431\u044a\u044f\u0432\u043b\u0435\u043d\u043e \u043e \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0432\u0435\u0442\u043a\u0438 Postfix 3.7, \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u0439 \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 2022 \u0433\u043e\u0434\u0430. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u044f\u043c\u0438 EPL 2.0 (Eclipse Public license) \u0438 IPL 1.0 (IBM Public License). 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