Can't send or receive email

joshghent

Hi there,

I’ve followed the setup guide and cannot seem to get mailcow to work on my DigitalOcean VPS. I cannot send or receive email.

My domain is: ghent.cloud with mail pointed to mail.ghent.cloud
I am running Mailcow behind the jwilder/nginx-proxy (which doesn’t appear to be the issue as I can connect to the UI fine)

I have a couple of errors that seem to be causing issues:

I get the following error from Postfix when sending an email outbound (i’ve tried with many different domains)
to=<redacted@gmail.com>, relay=none, delay=84687, delays=84677/0.27/10/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again)

And I get the following from dovecot on boot
doveconf: Error: t_readlink(/var/run/dovecot/dovecot.conf) failed: readlink() failed: No such file or directory
Warning: Transient problem: timeout Will retry in 1 seconds. 10 retries left.

However I can successfully ping from the unbound container
docker exec -it mailcowdockerized_unbound-mailcow_1 bash ping maps.rspamd.com
PING maps.rspamd.com (88.99.142.95): 56 data bytes 64 bytes from 88.99.142.95: seq=0 ttl=55 time=18.852 ms 64 bytes from 88.99.142.95: seq=1 ttl=55 time=18.093 ms

Additionally, when running the DNS check in the mailcow admin, it returns a 502 gateway for the domain.

I hope that this is enough information to help debug. Please let me know if you have any advice. Thanks for reading

Below is my docker-compose - slightly modified with a VIRTUAL_HOST that the nginx-proxy requires.

version: '2.1'
services:

    unbound-mailcow:
      image: mailcow/unbound:1.10
      environment:
        - TZ=${TZ}
      volumes:
        - ./data/hooks/unbound:/hooks
        - ./data/conf/unbound/unbound.conf:/etc/unbound/unbound.conf:ro
      restart: always
      tty: true
      networks:
        mailcow-network:
          ipv4_address: ${IPV4_NETWORK:-172.66.1}.254
          aliases:
            - unbound

    mysql-mailcow:
      image: mariadb:10.3
      depends_on:
        - unbound-mailcow
      stop_grace_period: 45s
      volumes:
        - mysql-vol-1:/var/lib/mysql/
        - mysql-socket-vol-1:/var/run/mysqld/
        - ./data/conf/mysql/:/etc/mysql/conf.d/:ro
      environment:
        - TZ=${TZ}
        - MYSQL_ROOT_PASSWORD=${DBROOT}
        - MYSQL_DATABASE=${DBNAME}
        - MYSQL_USER=${DBUSER}
        - MYSQL_PASSWORD=${DBPASS}
        - MYSQL_INITDB_SKIP_TZINFO=1
      restart: always
      ports:
        - "${SQL_PORT:-127.0.0.1:13306}:3306"
      networks:
        mailcow-network:
          aliases:
            - mysql

    redis-mailcow:
      image: redis:5-alpine
      volumes:
        - redis-vol-1:/data/
      restart: always
      ports:
        - "${REDIS_PORT:-127.0.0.1:7654}:6379"
      environment:
        - TZ=${TZ}
      networks:
        mailcow-network:
          ipv4_address: ${IPV4_NETWORK:-172.66.1}.249
          aliases:
            - redis

    clamd-mailcow:
      image: mailcow/clamd:1.35
      restart: always
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      environment:
        - TZ=${TZ}
        - SKIP_CLAMD=${SKIP_CLAMD:-n}
      volumes:
        - ./data/conf/clamav/:/etc/clamav/
      networks:
        mailcow-network:
          aliases:
            - clamd

    rspamd-mailcow:
      image: mailcow/rspamd:1.68
      stop_grace_period: 30s
      depends_on:
        - nginx-mailcow
        - dovecot-mailcow
      environment:
        - TZ=${TZ}
        - IPV4_NETWORK=${IPV4_NETWORK:-172.66.1}
        - IPV6_NETWORK=${IPV6_NETWORK:-fd4d:6169:6c63:6f77::/64}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
      volumes:
        - ./data/hooks/rspamd:/hooks
        - ./data/conf/rspamd/custom/:/etc/rspamd/custom
        - ./data/conf/rspamd/override.d/:/etc/rspamd/override.d
        - ./data/conf/rspamd/local.d/:/etc/rspamd/local.d
        - ./data/conf/rspamd/plugins.d/:/etc/rspamd/plugins.d
        - ./data/conf/rspamd/lua/:/etc/rspamd/lua/:ro
        - ./data/conf/rspamd/rspamd.conf.local:/etc/rspamd/rspamd.conf.local
        - ./data/conf/rspamd/rspamd.conf.override:/etc/rspamd/rspamd.conf.override
        - rspamd-vol-1:/var/lib/rspamd
      restart: always
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      hostname: rspamd
      networks:
        mailcow-network:
          aliases:
            - rspamd

    php-fpm-mailcow:
      image: mailcow/phpfpm:1.60
      command: "php-fpm -d date.timezone=${TZ} -d expose_php=0"
      depends_on:
        - redis-mailcow
      volumes:
        - ./data/hooks/phpfpm:/hooks
        - ./data/web:/web:rw
        - ./data/conf/rspamd/dynmaps:/dynmaps:ro
        - ./data/conf/rspamd/custom/:/rspamd_custom_maps
        - rspamd-vol-1:/var/lib/rspamd
        - mysql-socket-vol-1:/var/run/mysqld/
        - ./data/conf/sogo/:/etc/sogo/
        - ./data/conf/rspamd/meta_exporter:/meta_exporter:ro
        - ./data/conf/phpfpm/sogo-sso/:/etc/sogo-sso/
        - ./data/conf/phpfpm/php-fpm.d/pools.conf:/usr/local/etc/php-fpm.d/z-pools.conf
        - ./data/conf/phpfpm/php-conf.d/opcache-recommended.ini:/usr/local/etc/php/conf.d/opcache-recommended.ini
        - ./data/conf/phpfpm/php-conf.d/upload.ini:/usr/local/etc/php/conf.d/upload.ini
        - ./data/conf/phpfpm/php-conf.d/other.ini:/usr/local/etc/php/conf.d/zzz-other.ini
        - ./data/conf/dovecot/global_sieve_before:/global_sieve/before
        - ./data/conf/dovecot/global_sieve_after:/global_sieve/after
        - ./data/assets/templates:/tpls
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      environment:
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
        - LOG_LINES=${LOG_LINES:-9999}
        - TZ=${TZ}
        - DBNAME=${DBNAME}
        - DBUSER=${DBUSER}
        - DBPASS=${DBPASS}
        - MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
        - IMAP_PORT=${IMAP_PORT:-143}
        - IMAPS_PORT=${IMAPS_PORT:-993}
        - POP_PORT=${POP_PORT:-110}
        - POPS_PORT=${POPS_PORT:-995}
        - SIEVE_PORT=${SIEVE_PORT:-4190}
        - SUBMISSION_PORT=${SUBMISSION_PORT:-587}
        - SMTPS_PORT=${SMTPS_PORT:-465}
        - SMTP_PORT=${SMTP_PORT:-25}
        - API_KEY=${API_KEY:-invalid}
        - API_KEY_READ_ONLY=${API_KEY_READ_ONLY:-invalid}
        - API_ALLOW_FROM=${API_ALLOW_FROM:-invalid}
        - COMPOSE_PROJECT_NAME=${COMPOSE_PROJECT_NAME:-mailcow-dockerized}
        - SKIP_SOLR=${SKIP_SOLR:-y}
        - SKIP_CLAMD=${SKIP_CLAMD:-n}
        - ALLOW_ADMIN_EMAIL_LOGIN=${ALLOW_ADMIN_EMAIL_LOGIN:-n}
        - MASTER=${MASTER:-y}
      restart: always
      networks:
        mailcow-network:
          aliases:
            - phpfpm

    sogo-mailcow:
      image: mailcow/sogo:1.73
      environment:
        - DBNAME=${DBNAME}
        - DBUSER=${DBUSER}
        - DBPASS=${DBPASS}
        - TZ=${TZ}
        - LOG_LINES=${LOG_LINES:-9999}
        - MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
        - ACL_ANYONE=${ACL_ANYONE:-disallow}
        - ALLOW_ADMIN_EMAIL_LOGIN=${ALLOW_ADMIN_EMAIL_LOGIN:-n}
        - IPV4_NETWORK=${IPV4_NETWORK:-172.66.1}
        - SOGO_EXPIRE_SESSION=${SOGO_EXPIRE_SESSION:-480}
        - MASTER=${MASTER:-y}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      volumes:
        - ./data/conf/sogo/:/etc/sogo/
        - ./data/web/inc/init_db.inc.php:/init_db.inc.php
        - ./data/conf/sogo/custom-sogo.js:/usr/lib/GNUstep/SOGo/WebServerResources/js/custom-sogo.js
        - mysql-socket-vol-1:/var/run/mysqld/
        - sogo-web-vol-1:/sogo_web
        - sogo-userdata-backup-vol-1:/sogo_backup
      restart: always
      networks:
        mailcow-network:
          ipv4_address: ${IPV4_NETWORK:-172.66.1}.248
          aliases:
            - sogo

    dovecot-mailcow:
      image: mailcow/dovecot:1.120
      depends_on:
        - mysql-mailcow
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      cap_add:
        - NET_BIND_SERVICE
      volumes:
        - ./data/hooks/dovecot:/hooks
        - ./data/conf/dovecot:/etc/dovecot
        - ./data/assets/ssl:/etc/ssl/mail/:ro
        - ./data/conf/sogo/:/etc/sogo/
        - ./data/conf/phpfpm/sogo-sso/:/etc/phpfpm/
        - vmail-vol-1:/var/vmail
        - vmail-attachments-vol-1:/var/attachments
        - crypt-vol-1:/mail_crypt/
        - ./data/conf/rspamd/custom/:/etc/rspamd/custom
        - ./data/assets/templates:/templates
        - rspamd-vol-1:/var/lib/rspamd
        - mysql-socket-vol-1:/var/run/mysqld/
      environment:
        - LOG_LINES=${LOG_LINES:-9999}
        - DBNAME=${DBNAME}
        - DBUSER=${DBUSER}
        - DBPASS=${DBPASS}
        - TZ=${TZ}
        - MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
        - IPV4_NETWORK=${IPV4_NETWORK:-172.66.1}
        - ALLOW_ADMIN_EMAIL_LOGIN=${ALLOW_ADMIN_EMAIL_LOGIN:-n}
        - MAILDIR_GC_TIME=${MAILDIR_GC_TIME:-1440}
        - ACL_ANYONE=${ACL_ANYONE:-disallow}
        - SKIP_SOLR=${SKIP_SOLR:-y}
        - MAILDIR_SUB=${MAILDIR_SUB:-}
        - MASTER=${MASTER:-y}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
      ports:
        - "${DOVEADM_PORT:-127.0.0.1:19991}:12345"
        - "${IMAP_PORT:-143}:143"
        - "${IMAPS_PORT:-993}:993"
        - "${POP_PORT:-110}:110"
        - "${POPS_PORT:-995}:995"
        - "${SIEVE_PORT:-4190}:4190"
      restart: always
      tty: true
      ulimits:
        nproc: 65535
        nofile:
          soft: 20000
          hard: 40000
      hostname: ${MAILCOW_HOSTNAME}
      networks:
        mailcow-network:
          ipv4_address: ${IPV4_NETWORK:-172.66.1}.250
          aliases:
            - dovecot

    postfix-mailcow:
      image: mailcow/postfix:1.48
      depends_on:
        - mysql-mailcow
      volumes:
        - ./data/hooks/postfix:/hooks
        - ./data/conf/postfix:/opt/postfix/conf
        - ./data/assets/ssl:/etc/ssl/mail/:ro
        - postfix-vol-1:/var/spool/postfix
        - crypt-vol-1:/var/lib/zeyple
        - rspamd-vol-1:/var/lib/rspamd
        - mysql-socket-vol-1:/var/run/mysqld/
      environment:
        - LOG_LINES=${LOG_LINES:-9999}
        - TZ=${TZ}
        - DBNAME=${DBNAME}
        - DBUSER=${DBUSER}
        - DBPASS=${DBPASS}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
      cap_add:
        - NET_BIND_SERVICE
      ports:
        - "${SMTP_PORT:-25}:25"
        - "${SMTPS_PORT:-465}:465"
        - "${SUBMISSION_PORT:-587}:587"
      restart: always
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      hostname: ${MAILCOW_HOSTNAME}
      networks:
        mailcow-network:
          aliases:
            - postfix

    memcached-mailcow:
      image: memcached:alpine
      restart: always
      environment:
        - TZ=${TZ}
      networks:
        mailcow-network:
          aliases:
            - memcached

    nginx-mailcow:
      depends_on:
        - sogo-mailcow
        - php-fpm-mailcow
        - redis-mailcow
      image: nginx:mainline-alpine
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      command: /bin/sh -c "envsubst < /etc/nginx/conf.d/templates/listen_plain.template > /etc/nginx/conf.d/listen_plain.active &&
        envsubst < /etc/nginx/conf.d/templates/listen_ssl.template > /etc/nginx/conf.d/listen_ssl.active &&
        envsubst < /etc/nginx/conf.d/templates/server_name.template > /etc/nginx/conf.d/server_name.active &&
        envsubst < /etc/nginx/conf.d/templates/sogo.template > /etc/nginx/conf.d/sogo.active &&
        envsubst < /etc/nginx/conf.d/templates/sogo_eas.template > /etc/nginx/conf.d/sogo_eas.active &&
        . /etc/nginx/conf.d/templates/sogo.auth_request.template.sh > /etc/nginx/conf.d/sogo_proxy_auth.active &&
        . /etc/nginx/conf.d/templates/sites.template.sh > /etc/nginx/conf.d/sites.active &&
        nginx -qt &&
        until ping phpfpm -c1 > /dev/null; do sleep 1; done &&
        until ping sogo -c1 > /dev/null; do sleep 1; done &&
        until ping redis -c1 > /dev/null; do sleep 1; done &&
        until ping rspamd -c1 > /dev/null; do sleep 1; done &&
        exec nginx -g 'daemon off;'"
      environment:
        - HTTPS_PORT=${HTTPS_PORT:-443}
        - HTTP_PORT=${HTTP_PORT:-80}
        - MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
        - IPV4_NETWORK=${IPV4_NETWORK:-172.66.1}
        - TZ=${TZ}
        - ALLOW_ADMIN_EMAIL_LOGIN=${ALLOW_ADMIN_EMAIL_LOGIN:-n}
        - LETSENCRYPT_HOST=mail.ghent.cloud
        - VIRTUAL_HOST=mail.ghent.cloud
      volumes:
        - ./data/web:/web:ro
        - ./data/conf/rspamd/dynmaps:/dynmaps:ro
        - ./data/assets/ssl/:/etc/ssl/mail/:ro
        - ./data/conf/nginx/:/etc/nginx/conf.d/:rw
        - ./data/conf/rspamd/meta_exporter:/meta_exporter:ro
        - sogo-web-vol-1:/usr/lib/GNUstep/SOGo/
      restart: always
      networks:
        mailcow-network:
          aliases:
            - nginx
        proxy:

    acme-mailcow:
      depends_on:
        - nginx-mailcow
      image: mailcow/acme:1.70
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      environment:
        - LOG_LINES=${LOG_LINES:-9999}
        - ADDITIONAL_SAN=${ADDITIONAL_SAN}
        - MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
        - DBNAME=${DBNAME}
        - DBUSER=${DBUSER}
        - DBPASS=${DBPASS}
        - SKIP_LETS_ENCRYPT=${SKIP_LETS_ENCRYPT:-n}
        - ENABLE_SSL_SNI=${ENABLE_SSL_SNI:-n}
        - SKIP_IP_CHECK=${SKIP_IP_CHECK:-n}
        - SKIP_HTTP_VERIFICATION=${SKIP_HTTP_VERIFICATION:-n}
        - ONLY_MAILCOW_HOSTNAME=${ONLY_MAILCOW_HOSTNAME:-n}
        - LE_STAGING=${LE_STAGING:-n}
        - TZ=${TZ}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
        - SNAT_TO_SOURCE=${SNAT_TO_SOURCE:-n}
        - SNAT6_TO_SOURCE=${SNAT6_TO_SOURCE:-n}
      volumes:
        - ./data/web/.well-known/acme-challenge:/var/www/acme:rw
        - ./data/assets/ssl:/var/lib/acme/:rw
        - ./data/assets/ssl-example:/var/lib/ssl-example/:ro
        - mysql-socket-vol-1:/var/run/mysqld/
      restart: always
      networks:
        mailcow-network:
          aliases:
            - acme

    netfilter-mailcow:
      image: mailcow/netfilter:1.34
      stop_grace_period: 30s
      depends_on:
        - dovecot-mailcow
        - postfix-mailcow
        - sogo-mailcow
        - php-fpm-mailcow
        - redis-mailcow
      restart: always
      privileged: true
      environment:
        - TZ=${TZ}
        - IPV4_NETWORK=${IPV4_NETWORK:-172.66.1}
        - IPV6_NETWORK=${IPV6_NETWORK:-fd4d:6169:6c63:6f77::/64}
        - SNAT_TO_SOURCE=${SNAT_TO_SOURCE:-n}
        - SNAT6_TO_SOURCE=${SNAT6_TO_SOURCE:-n}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
      network_mode: "host"
      volumes:
        - /lib/modules:/lib/modules:ro

    watchdog-mailcow:
      image: mailcow/watchdog:1.74
      # Debug
      #command: /watchdog.sh
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      volumes:
        - rspamd-vol-1:/var/lib/rspamd
        - mysql-socket-vol-1:/var/run/mysqld/
        - ./data/assets/ssl:/etc/ssl/mail/:ro
      restart: always
      environment:
        - IPV6_NETWORK=${IPV6_NETWORK:-fd4d:6169:6c63:6f77::/64}
        - LOG_LINES=${LOG_LINES:-9999}
        - TZ=${TZ}
        - DBNAME=${DBNAME}
        - DBUSER=${DBUSER}
        - DBPASS=${DBPASS}
        - DBROOT=${DBROOT}
        - USE_WATCHDOG=${USE_WATCHDOG:-n}
        - WATCHDOG_NOTIFY_EMAIL=${WATCHDOG_NOTIFY_EMAIL}
        - WATCHDOG_NOTIFY_BAN=${WATCHDOG_NOTIFY_BAN:-y}
        - WATCHDOG_EXTERNAL_CHECKS=${WATCHDOG_EXTERNAL_CHECKS:-n}
        - WATCHDOG_MYSQL_REPLICATION_CHECKS=${WATCHDOG_MYSQL_REPLICATION_CHECKS:-n}
        - MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
        - IPV4_NETWORK=${IPV4_NETWORK:-172.66.1}
        - IP_BY_DOCKER_API=${IP_BY_DOCKER_API:-0}
        - CHECK_UNBOUND=${CHECK_UNBOUND:-1}
        - SKIP_CLAMD=${SKIP_CLAMD:-n}
        - SKIP_LETS_ENCRYPT=${SKIP_LETS_ENCRYPT:-n}
        - HTTPS_PORT=${HTTPS_PORT:-443}
        - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
        - REDIS_SLAVEOF_PORT=${REDIS_SLAVEOF_PORT:-}
        - EXTERNAL_CHECKS_THRESHOLD=1
        - NGINX_THRESHOLD=5
        - UNBOUND_THRESHOLD=5
        - REDIS_THRESHOLD=5
        - MYSQL_THRESHOLD=5
        - MYSQL_REPLICATION_THRESHOLD=1
        - SOGO_THRESHOLD=3
        - POSTFIX_THRESHOLD=8
        - CLAMD_THRESHOLD=15
        - DOVECOT_THRESHOLD=12
        - DOVECOT_REPL_THRESHOLD=2
        - PHPFPM_THRESHOLD=5
        - RATELIMIT_THRESHOLD=1
        - FAIL2BAN_THRESHOLD=1
        - ACME_THRESHOLD=1
        - IPV6NAT_THRESHOLD=1
        - RSPAMD_THRESHOLD=5
        - OLEFY_THRESHOLD=5
      networks:
        mailcow-network:
          aliases:
            - watchdog

    dockerapi-mailcow:
      image: mailcow/dockerapi:1.36
      restart: always
      oom_kill_disable: true
      dns:
        - ${IPV4_NETWORK:-172.66.1}.254
      environment:
        - DBROOT=${DBROOT}
        - TZ=${TZ}
      volumes:
        - /var/run/docker.sock:/var/run/docker.sock:ro
      networks:
        mailcow-network:
          aliases:
            - dockerapi

    solr-mailcow:
      image: mailcow/solr:1.7
      restart: always
      volumes:
        - solr-vol-1:/opt/solr/server/solr/dovecot-fts/data
      ports:
        - "${SOLR_PORT:-127.0.0.1:18983}:8983"
      environment:
        - TZ=${TZ}
        - SOLR_HEAP=${SOLR_HEAP:-1024}
        - SKIP_SOLR=${SKIP_SOLR:-y}
      networks:
        mailcow-network:
          aliases:
            - solr

    olefy-mailcow:
      image: mailcow/olefy:1.2
      restart: always
      environment:
        - TZ=${TZ}
        - OLEFY_BINDADDRESS=0.0.0.0
        - OLEFY_BINDPORT=10055
        - OLEFY_TMPDIR=/tmp
        - OLEFY_PYTHON_PATH=/usr/bin/python3
        - OLEFY_OLEVBA_PATH=/usr/bin/olevba3
        - OLEFY_LOGLVL=20
        - OLEFY_MINLENGTH=500
        - OLEFY_DEL_TMP=1
      networks:
        mailcow-network:
          aliases:
            - olefy

    ipv6nat-mailcow:
      depends_on:
        - unbound-mailcow
        - mysql-mailcow
        - redis-mailcow
        - clamd-mailcow
        - rspamd-mailcow
        - php-fpm-mailcow
        - sogo-mailcow
        - dovecot-mailcow
        - postfix-mailcow
        - memcached-mailcow
        - nginx-mailcow
        - acme-mailcow
        - netfilter-mailcow
        - watchdog-mailcow
        - dockerapi-mailcow
        - solr-mailcow
      environment:
        - TZ=${TZ}
      image: robbertkl/ipv6nat
      restart: always
      privileged: true
      network_mode: "host"
      volumes:
        - /var/run/docker.sock:/var/run/docker.sock:ro
        - /lib/modules:/lib/modules:ro

networks:
  proxy:
    external:
      name: https-proxy
  mailcow-network:
    driver: bridge
    driver_opts:
      com.docker.network.bridge.name: br-mailcow
    enable_ipv6: true
    ipam:
      driver: default
      config:
        - subnet: ${IPV4_NETWORK:-172.66.1}.0/24
        - subnet: ${IPV6_NETWORK:-fd4d:6169:6c63:6f77::/64}

volumes:
  # Storage for email files
  vmail-vol-1:
  # Storage for attachments (deduplicated)
  vmail-attachments-vol-1:
  mysql-vol-1:
  mysql-socket-vol-1:
  redis-vol-1:
  rspamd-vol-1:
  solr-vol-1:
  postfix-vol-1:
  crypt-vol-1:
  sogo-web-vol-1:
  sogo-userdata-backup-vol-1:

tundrabit

Hi, have you tried without the “VIRTUAL_HOST” section in docker-compose.yml? AFAIK, everything should be entered inside the mailcow.conf and/or adding an docker-compose.override.yml.
Also, you might want to look into configuring a PTR for mail.ghent.cloud.

diekuh

Your DNS resolution is not working.

        - subnet: ${IPV4_NETWORK:-172.66.1}.0/24

That’s not an RFC1918 network and the reason it fails.

You also missed to tell us that “little information”. 🙂

joshghent

diekuh Yes! This was it, such a dumb issue. Thank you so much for looking into this. Really appreciate your work. Thanks for an amazing tool!

MAGIC

Also dont change the subnet there, we have an extra section in mailcow.conf for this!

diekuh

Thank you! 🙂