mailserver VS docker-mailserver

mailserver: image: hardware/mailserver:1.1-stable restart: ${MAILSERVER_RESTART_MODE} domainname: ${MAILSERVER_DOMAIN} hostname: ${MAILSERVER_HOSTNAME} deploy: placement: constraints: - node.role == manager labels: - traefik.enable=true - traefik.docker.network=traefik-public - traefik.constraint-label=traefik-public - traefik.frontend.rule=Host:mail.${MAILSERVER_DOMAIN} - traefik.http.routers.mailserver-spam-http.rule=Host(`${MAILSERVER_FQDN?Variable not set}`) || Host(`pop3.${MAILSERVER_DOMAIN?Variable not set}`) || Host(`smtp.${MAILSERVER_DOMAIN?Variable not set}`) || Host(`imap.${MAILSERVER_DOMAIN?Variable not set}`) || Host(`${MAILSERVER_DOMAIN_RSPAMD?Variable not set}`) - traefik.http.routers.mailserver-spam-http.entrypoints=http - traefik.http.routers.mailserver-spam-http.middlewares=https-redirect - traefik.http.routers.mailserver-spam-https.rule=Host(`${MAILSERVER_FQDN?Variable not set}`) || Host(`pop3.${MAILSERVER_DOMAIN?Variable not set}`) || Host(`smtp.${MAILSERVER_DOMAIN?Variable not set}`) || Host(`imap.${MAILSERVER_DOMAIN?Variable not set}`) || Host(`${MAILSERVER_DOMAIN_RSPAMD?Variable not set}`) - traefik.http.routers.mailserver-spam-https.entrypoints=https - traefik.http.routers.mailserver-spam-https.tls=true - traefik.http.routers.mailserver-spam-https.tls.certresolver=le - traefik.http.services.mailserver-spam.loadbalancer.server.port=11334 ports: - "25:25" # SMTP - Required - "110:110" # POP3 STARTTLS - Optional - For webmails/desktop clients - "143:143" # IMAP STARTTLS - Optional - For webmails/desktop clients - "465:465" # SMTPS SSL/TLS - Optional - Enabled for compatibility reason, otherwise disabled - "587:587" # Submission STARTTLS - Optional - For webmails/desktop clients - "993:993" # IMAPS SSL/TLS - Optional - For webmails/desktop clients - "995:995" # POP3S SSL/TLS - Optional - For webmails/desktop clients - "4190:4190" # SIEVE STARTTLS - Optional - Recommended for mail filtering environment: - FQDN=${MAILSERVER_FQDN} - DOMAIN=${MAILSERVER_DOMAIN} - DBPASS=${MAILSERVER_DATABASE_USER_PASSWORD} # MariaDB database password (required) - RSPAMD_PASSWORD=${MAILSERVER_RSPAMD_PASSWORD} # Rspamd WebUI password (required) #- ADD_DOMAINS=aa.tld, www.bb.tld... # Add additional domains separated by commas (needed for dkim keys etc.) - ENABLE_POP3=true # Enable POP3 protocol # # Full list : https://github.com/hardware/mailserver#environment-variables # volumes: - mail:/var/mail #- ./cert:/etc/letsencrypt/live/${MAILSERVER_FQDN} depends_on: - mariadb - redis networks: - traefik-public - default

I can recommend Docker mailserver (it also works with Podman). It is already pretty lightweight but you can even make it lighter and it has an active community as well as regular updates.

https://github.com/docker-mailserver/docker-mailserver https://docker-mailserver.github.io/docker-mailserver/latest/ https://www.programonaut.com/how-to-host-a-mail-server-with-docker-for-free-step-by-step/

Use https://github.com/docker-mailserver/docker-mailserver or mailcow . They both provide reasonable default setup for spam detection and even UI for adjusting settings.

" this docker based mail server looks pretty legit https://github.com/docker-mailserver/docker-mailserver "

Check https://github.com/docker-mailserver/docker-mailserver It has almost everything in a single docker image. Email is not the easiest to implement with container(s), but that project has managed it.

I set up docker-mailserver[0] Monday in ~6 hours, most of which were me trying to be fancy using podman instead of docker and dealing with SELinux. But then again I did choose it over mail-in-a-box for just that level of customization. Obviously I can't tell how reliable it will be in the long run yet, but since it's using the classic Postfix/Dovecot stack I expect it'll be pretty stable

[0] https://github.com/docker-mailserver/docker-mailserver