Docker MailServer + Round Cube (easy install)

README.md

Setup Docker MailServer + Round Cube (easy install)

1. Create docker-compose.yml (content below) and up

$ docker-compose up -d

2. Download setup script

$ wget https://raw.githubusercontent.com/docker-mailserver/docker-mailserver/master/setup.sh
$ chmod a+x ./setup.sh

3. Create config files:

Run this command to fix: "Recipient address rejected: User unknown in local recipient table"

$ echo "mydestination = localhost.$mydomain, localhost" >> ./docker-data/dms/config/postfix-main.cf

and create domains in /etc/hosts like:

domainxyz.com 127.0.0.1
domainxtp.com 127.0.0.1

4: Setup dns rightly (to score in mail-tester.com)

• MX mail [SERVER IP]

• MX @ [SERVER IP]

• MX smtp [SERVER IP]

• A @ [SERVER IP] (if not exists)

• A webmail [SERVER IP]

• TXT @ v=spf1 a mx ip4:[SERVER IP] ~all

• TXT _dmarc v=DMARC1; p=none

5: Add roundcube to reverse proxy (nginx)

server {
    listen      80;
    server_name webmail.YOURSITE.COM;
    
    location / {
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_pass http://localhost:9002;
  }
}

6. HTTPS SSL (opticional)

$ certbot --nginx

7. Add email accounts (work with multiple domains in same server)

$ ./setup.sh email add contato@[yourdomain] [your_strong_password]
$ ./setup.sh email add contato@[youranotherdomain] [your_strong_password]

NOTE:

• Dont forget to allow all ports from docker composer file on ufw or another firewall if is enabled
• If you work with multiple domains, you need to repeat steps for dns and hosts configuration for your domains

docker-compose.yml

services:
  mailserver:
    image: ghcr.io/docker-mailserver/docker-mailserver:latest
    container_name: mailserver
    # Provide the FQDN of your mail server here (Your DNS MX record should point to this value)
    hostname: [yourhostname] #can be your main hostname
    ports:
    - "25:25"    # SMTP  (explicit TLS => STARTTLS)
    - "143:143"  # IMAP4 (explicit TLS => STARTTLS)
    - "465:465"  # ESMTP (implicit TLS)
    - "587:587"  # ESMTP (explicit TLS => STARTTLS)
    - "993:993"  # IMAP4 (implicit TLS)
    - "110:110"  # POP3
    - "995:995"  # POP3 (with TLS)
    volumes:
      - ./docker-data/dms/mail-data/:/var/mail/
      - ./docker-data/dms/mail-state/:/var/mail-state/
      - ./docker-data/dms/mail-logs/:/var/log/mail/
      - ./docker-data/dms/config/:/tmp/docker-mailserver/
      - /etc/localtime:/etc/localtime:ro
    environment:
      - ENABLE_RSPAMD=1
      - ENABLE_CLAMAV=1
      - ENABLE_FAIL2BAN=1
    cap_add:
      - NET_ADMIN # For Fail2Ban to work
    restart: always
  roundcubemail:
    image: roundcube/roundcubemail:latest
    container_name: roundcubemail
#    restart: unless-stopped
    volumes:
      - ./www:/var/www/html
      - ./db/sqlite:/var/roundcube/db
    ports:
      - 9002:80
    environment:
      - ROUNDCUBEMAIL_DB_TYPE=sqlite
      - ROUNDCUBEMAIL_SKIN=elastic
      - ROUNDCUBEMAIL_DEFAULT_HOST=tls://mailserver
      - ROUNDCUBEMAIL_SMTP_SERVER=tls://mailserver