{"id":162,"date":"2020-12-30T02:32:18","date_gmt":"2020-12-30T05:32:18","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=162"},"modified":"2026-04-07T01:36:49","modified_gmt":"2026-04-07T04:36:49","slug":"como-instalar-mailcow","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-mailcow\/","title":{"rendered":"Como instalar o servidor de email Mailcow"},"content":{"rendered":"\n

O Mailcow<\/a>, \u00e9 um servidor de Email completo, que gostamos de indicar, possui uma comunidade bastante ativa, atualiza\u00e7\u00f5es, novidades e fixes quase di\u00e1rios. <\/p>\n\n\n\n

Na HelpSysAdmin<\/a> temos v\u00e1rios clientes que utilizam o Mailcow para hospedar os servi\u00e7os de email dos in\u00fameros dom\u00ednios de seus clientes. <\/p>\n\n\n\n

O Mailcow utiliza o Anti Spam Rspamd com dezenas de regras e plugins instalados e pr\u00e9 configurados; ap\u00f3s alguns ajustes, os clientes realmente sentem a diferen\u00e7a em rela\u00e7\u00e3o a outras solu\u00e7\u00f5es n\u00e3o t\u00e3o boas anti spam. <\/p>\n\n\n\n

O Anti v\u00edrus utilizado \u00e9 o ClamAV que possui grandes vantagens, como a instala\u00e7\u00e3o de assinaturas adicionais Anti Virus, Anti Phishing, Anti Malware e outros como abordamos em outro post<\/a>, para resumir, o Webmail utilizado \u00e9 o SOGo Groupware<\/a> que possui muito mais que a fun\u00e7\u00e3o de enviar email.<\/p>\n\n\n\n

A HelpSysAdmin oferece o servi\u00e7o de instala\u00e7\u00e3o, configura\u00e7\u00e3o, otimiza\u00e7\u00e3o, suporte por 30 dias ap\u00f3s instala\u00e7\u00e3o a qualquer recurso ou configura\u00e7\u00e3o, al\u00e9m de melhorias no MailCow por (R$ 100,00 )<\/a><\/strong>.
<\/p>\n\n\n\n

A seguir vamos abordar a instala\u00e7\u00e3o e configura\u00e7\u00e3o padr\u00e3o do Mailcow<\/strong>.<\/p>\n\n\n\n

Preparativos antes de instalar o Mailcow<\/h2>\n\n\n\n

Antes de iniciar a instala\u00e7\u00e3o \u00e9 necess\u00e1rio que voc\u00ea fa\u00e7a alguns preparativos em rela\u00e7\u00e3o as DNS do dom\u00ednio que deseja utilizar como principal no Mailcow. <\/p>\n\n\n\n

Para efeito de exemplo e f\u00e1cil entendimento vamos usar um dom\u00ednio que utilizamos para testes, helpsysadmin.ml . O gerenciamento das DNS utilizaremos o Cloudflare, para exemplificar o preenchimento das entradas DNS que ser\u00e3o necess\u00e1rias. Se preferir, utilize o gerenciador de DNS de host de seu dom\u00ednio.<\/p>\n\n\n\n

O Mailcow \u00e9 compat\u00edvel com Ubuntu 18 e 20. N\u00f3s vamos utilizar o Ubuntu 20. O Mailcow precisa de um subdom\u00ednio que ser\u00e1 a URL de acesso aos pain\u00e9is e necess\u00e1rias para configura\u00e7\u00e3o do Mail client (\u00e9 poss\u00edvel criar outras depois). Este subdom\u00ednio precisa ser o hostname de seu servidor e ter o reverso configurado junto ao seu Data Center.<\/p>\n\n\n\n

Vamos utilizar mail.helpsysadmin.ml<\/strong><\/h3>\n\n\n\n

1 – Atualize seu servidor Ubuntu e reinicie<\/p>\n\n\n\n

apt update; apt upgrade -y;<\/pre><\/div>\n\n\n\n
2 – Acesse o Shell e Configure o Hostname de seu servidor<\/p>\n\n\n\n
hostnamectl set-hostname mail.helpsysadmin.ml<\/pre><\/div>\n\n\n\n
3 – Ajuste o Time Zone do servidor para America\/Sao_Paulo<\/p>\n\n\n\n
timedatectl set-timezone America\/Sao_Paulo<\/pre><\/div>\n\n\n\n
4 – Acesse o seu Gerenciador de DNS e crie uma entrada do tipo A com nome mail, apontando para o IP do seu servidor. Aqui vamos utilizar o CloudFlare<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
5 – Com a entrada criada, agora \u00e9 o momento de mudar o reverso do IP<\/strong> (rDNS) para o nome do seu hostname (mail.helpsysadmin.ml<\/strong>). Voc\u00ea poder\u00e1 fazer esta altera\u00e7\u00e3o junto ao seu Data Center ou provedor VPS.<\/p>\n\n\n\n
6 – Adicione o IP e hostname em hosts<\/p>\n\n\n\n
nano \/etc\/hosts<\/pre><\/div>\n\n\n\n
\"\"
Preencha conforme a imagem<\/figcaption><\/figure>\n\n\n\n
Criando SWAP para o Servidor<\/h3>\n\n\n\n
Se ainda n\u00e3o possui SWAP criada em seu servidor, siga os passos a seguir. Vamos criar um arquivo de SWAP de 4 GB.<\/p>\n\n\n\n
1 -crie o arquivo para swap, altere permiss\u00f5es e ative swap<\/p>\n\n\n\n
dd if=\/dev\/zero of=\/swapfile count=4096 bs=1MiB\nchmod 600 \/swapfile\nmkswap \/swapfile\nswapon \/swapfile<\/pre><\/div>\n\n\n\n
2 – confirme se swap foi criada corretamente<\/p>\n\n\n\n
free -m<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
3 – edite o arquivo \/etc\/fstab e adicione<\/p>\n\n\n\n
\/swapfile   swap    swap    sw  0   0<\/pre><\/div>\n\n\n\n
Instalando o docker e docker-compose<\/h3>\n\n\n\n
1 – Instale o Docker , habilite e inicie <\/p>\n\n\n\n
curl -sSL https:\/\/get.docker.com\/ | CHANNEL=stable sh\nsystemctl enable docker.service\nsystemctl start docker.service<\/pre><\/div>\n\n\n\n
2 – Instale o docker-compose<\/p>\n\n\n\n
LATEST=$(curl -Ls -w %{url_effective} -o \/dev\/null https:\/\/github.com\/docker\/compose\/releases\/latest) && \\\nLATEST=${LATEST##*\/} && \\\ncurl -L https:\/\/github.com\/docker\/compose\/releases\/download\/$LATEST\/docker-compose-$(uname -s)-$(uname -m) > \/usr\/local\/bin\/docker-compose\nchmod +x \/usr\/local\/bin\/docker-compose<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Instalando o Mailcow<\/h3>\n\n\n\n
1 – Instale o git<\/p>\n\n\n\n
apt install git -y<\/pre><\/div>\n\n\n\n
2 – Baixando o Mailcow <\/p>\n\n\n\n
cd \/opt\ngit clone https:\/\/github.com\/mailcow\/mailcow-dockerized\ncd mailcow-dockerized<\/pre><\/div>\n\n\n\n
3 – Gerando o arquivo de configura\u00e7\u00e3o. Lembre-se de informar seu hostname quando pedir sua FQDN<\/p>\n\n\n\n
.\/generate_config.sh<\/pre><\/div>\n\n\n\n
4 – Altere a configura\u00e7\u00e3o se precisar<\/p>\n\n\n\n
nano mailcow.conf<\/pre><\/div>\n\n\n\n
5 – Extraia as imagens e execute o arquivo do docker<\/p>\n\n\n\n
docker-compose pull\ndocker-compose up -d<\/pre><\/div>\n\n\n\n
6 – Acesse o Mailcow e troque a senha do admin<\/p>\n\n\n\n
https:\/\/seuhostname\/admin
Usu\u00e1rio: admin
Senha: moohoo
<\/p>\n\n\n\n
\"Acessando<\/figure>\n\n\n\n
<\/p>\n\n\n\n
7 – Alterando a senha do admin o mais breve poss\u00edvel<\/p>\n\n\n\n
\n
\"Altere<\/figure>\n<\/figure>\n\n\n\n
Configurando MailCow<\/h3>\n\n\n\n
Nesta parte,  o mais importante \u00e9 configurar<\/a> as entradas NS do hostname que escolheu. <\/p>\n\n\n\n
Vamos continuar utilizando o CloudFlare que \u00e9 onde est\u00e1 apontado nosso dom\u00ednio.  <\/p>\n\n\n\n
1 – Continuando no painel do Mailcow, Logado como admin, clique em Configura\u00e7\u00e3o >> Contas , a seguir clique em Adicionar Dom\u00ednio.<\/p>\n\n\n\n
\"Configurando<\/figure>\n\n\n\n
<\/p>\n\n\n\n
2 – Nesta tela informe seu dom\u00ednio principal e ajuste os limites para sua conta. Ao final clique em “Add domain and restart SOGo<\/strong>“<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
3 – A conta que acaba de criar ser\u00e1 listada conforme imagem a seguir. Clique no \u00edcone DNS<\/p>\n\n\n\n
\"Clique
Clique no Bot\u00e3o DNS<\/figcaption><\/figure>\n\n\n\n
4 – Esta parte \u00e9 muito importe e voc\u00ea n\u00e3o precisar\u00e1 configur\u00e1-la toda a cada novo dom\u00ednio que hospedar. Para preencher vamos utilizar nosso dom\u00ednio que est\u00e1 no CloudFlare<\/a>. Obviamente o que est\u00e1 em verde est\u00e1 OK. O que est\u00e1 em X vermelho precisamos criar no cloudflare. Veja a imagem abaixo:<\/p>\n\n\n\n
Nota:<\/strong> as duas primeiras entradas que est\u00e3o em verde informam que voc\u00ea criou o IP reverso rDNS de forma correta (abordamos este tema no principio deste texto)<\/p>\n\n\n\n
5 – Criando as entradas NS no CloudFlare, uma a uma<\/p>\n\n\n\n
Nota:<\/strong> observe que agora vamos criar entradas para mail e n\u00e3o mais para a raiz do dom\u00ednio:

6 – Abaixo exemplo de como criar entrada TLSA. Execute o mesmo de acordo com a tabela acima<\/p>\n\n\n\n
<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
7 – Ap\u00f3s preencher todas as entradas TLSA o resultado ser\u00e1 este:

<\/p>\n\n\n\n
\"Entradas<\/figure>\n\n\n\n
8 – Finalizando as configura\u00e7\u00f5es do dom\u00ednio principal<\/p>\n\n\n\n
Como pudemos ver na tabela do iten 4 ainda faltam algumas entradas essenciais para a configura\u00e7\u00e3o do MailCow. Vamos a elas:

–  Entradas MX  s\u00e3o informa\u00e7\u00f5es DNS que declaram e direcionam os servi\u00e7os de email para o servidor de email correto.<\/p>\n\n\n\n
\"Entrada<\/figure>\n\n\n\n
<\/p>\n\n\n\n
– Entrada SRV <\/p>\n\n\n\n
\"Entrada<\/figure>\n\n\n\n
<\/p>\n\n\n\n
Pronto! Vamos verificar se est\u00e1 tudo certo agora, para finalmente, hospedar contas de email, dom\u00ednios etc…<\/p>\n\n\n\n
<\/p>\n\n\n\n
9 – Assim como fez na op\u00e7\u00e3o 3 clique no bot\u00e3o DNS e aguarde. O resultado esperado \u00e9 “verde” para tudo , exceto SPF e DKIM que ainda n\u00e3o configuramos<\/p>\n\n\n\n
\"DNS<\/figure>\n\n\n\n
9 – Finalizando com a configura\u00e7\u00e3o do DKIM e SPF<\/p>\n\n\n\n
No Painel de Controle do MailCow, clique no menu superior direito (Configura\u00e7\u00e3o >> Administra\u00e7\u00e3o):
<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
10 – A seguir menu esquerdo, localize e clique Administra\u00e7\u00e3o >>  Registro ARC\/DKIM<\/p>\n\n\n\n
\"DKIM<\/figure>\n\n\n\n
11 – A cada novo dom\u00ednio que hospedar voc\u00ea dever\u00e1 gerar um DKIN e ajustar o SPF para ele. Preencha da seguinte forma:

Domain\/s<\/strong> : dom\u00ednio referente a conta q acaba de criar
Selector<\/strong>: sugiro deixar o default “dekin” (sem aspas)
Tamanho do registro DKIM<\/strong>: gosto de utilizar 2048 bits

Para finalizar clique em  “+Salvar<\/strong>” . Note que uma chave privada foi criada para o DKIM, n\u00f3s vamos utilizar esta esta chave em nosso provedor de DNS.

Quanto ao SPF, \u00e9 uma tarefa basta importante e simples, por isso vamos abordar no pr\u00f3ximo t\u00f3pico, sobre configura\u00e7\u00e3o do DKIM.<\/p>\n\n\n\n
12 – DKIM
Adicione uma entrada TXT com nome dkim._domainkey e no campo conte\u00fado, cole a Prive Key que geramos no passo anterior<\/p>\n\n\n\n
\"Entrada<\/figure>\n\n\n\n
Insira o SPF<\/p>\n\n\n\n
\"SPF<\/figure>\n\n\n\n
Comentando sobre \u00faltimos recursos importante<\/h2>\n\n\n\n
<\/p>\n\n\n\n
1 – O MailCow \u00e9 totalmente integrado ao Rspamd e possui uma interface onde \u00e9 poss\u00edvel ajustar score, filtros, visualizar logs, etc. Sugiro muito cuidado com a interface, utilize senhas muito seguras e restrinja o acesso.<\/p>\n\n\n\n
Para acessar pelo primeira vamos criar uma senha (bastante segura). 
Acesse o Painel do MailCow na p\u00e1gina principal,  localize Rspamd. Modifique a senha e clique no link “Rspamd UI<\/strong>“<\/p>\n\n\n\n
\"\"
clique no link para acessar rspamd ap\u00f3s alterar senha<\/figcaption><\/figure>\n\n\n\n
Bastante cuidado com as altera\u00e7\u00f5es no rspamd, symbols, configurations etc.<\/p>\n\n\n\n
Deseja ter o MailCow\/ Antivirus, Backups etc, otimizado, instalado e configurado com toda a nossa experi\u00eancia e ainda suporte de 30 dias ? Conte conosco, estamos aqui!<\/a>\ud83d\ude42<\/p>\n\n\n\n
Espero que este post tenha lhe ajudado !!! At\u00e9 a pr\u00f3xima \ud83d\ude42<\/p>\n\n\n\n
Veja mais: Como instalar o CENTMIN MOD no Almalinux 8<\/a><\/strong>
See more: Finding the number of email accounts on cPanel server<\/a><\/strong>
Veja mais: Como instalar Portainer para gerenciamento Docker com Nginx Proxy Manager no Ubuntu<\/a><\/strong>
See more: How to install mailserver Mailcow<\/a><\/strong><\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
O Mailcow, \u00e9 um servidor de Email completo, que gostamos de indicar, possui uma comunidade bastante ativa, atualiza\u00e7\u00f5es, novidades e fixes quase […]<\/p>\n","protected":false},"author":2,"featured_media":168,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[21,19,20],"class_list":["post-162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gerenciamento-servidor","tag-docker","tag-mailcow","tag-servidor-de-email"],"yoast_head":"\nComo instalar o servidor de email Mailcow servidor de email completo<\/title>\n<meta name=\"description\" content=\"Como instalar o servidor de email Mailcow, servidor de email, antispam rspamd eficiente e antivirus poderoso no servidor linux\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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