/opt/mailman/core/mailman-extra.cfg. now has #lmtp_host: localhost lmtp_host: 127.0.0.1 lmtp_port: 8024 But but mail log shows 2021-08-10T14:13:28.927266-04:00@####### postfix/qmgr[37253]: DDF5D3083EC2: from=<user@user.com>, size=8181, nrcpt=1 (queue active) 2021-08-10T14:13:28.973273-04:00@####### postfix/lmtp[39368]: DDF5D3083EC2: to=<test@.....>, relay=127.0.0.1[127.0.0.1]:8024, delay=0.07, delays=0.04/0.02/0.01/0, dsn=4.4.2, status=deferred (lost connection with 127.0.0.1[127.0.0.1] while receiving the initial server greeting) Also to clarify the images no longer have hard coded ips so I should NOT DO this correct? ----------------------------- lmtp_host: 172.19.199.2 lmtp_port: 8024 smtp_host: 172.19.199.1 smtp_port: 25 ----------------------------- here is my docker-compose.yaml strip out -------------------------------- version: '2' services: mailman-core: image: maxking/mailman-core:0.3 container_name: mailman-core hostname: mailman-core volumes: - /opt/mailman/core:/opt/mailman/ stop_grace_period: 30s links: - database:database depends_on: - database environment: - DATABASE_URL=postgres://@@@######$:@@@######$@database/mailmandb - DATABASE_TYPE=postgres - DATABASE_CLASS=@@@######$.database.postgresql.PostgreSQLDatabase - HYPERKITTY_API_KEY=@@@######$ ports: - "127.0.0.1:8001:8001" # API - "127.0.0.1:8024:8024" # LMTP - incoming emails networks: mailman: mailman-web: image: maxking/mailman-web:0.3 container_name: mailman-web hostname: mailman-web depends_on: - database links: - mailman-core:mailman-core - database:database volumes: - /opt/mailman/web:/opt/mailman-web-data environment: - MAILMAN_ADMIN_USER=@@@######$ - MAILMAN_ADMIN_EMAIL=@@@######$@@@@######$ - SERVE-FROM_DOMAIN=@@@######$.@@@######$.org - UWSGI_STATIC_MAP=/static=/opt/mailman-web-data/static - DATABASE_TYPE=postgres - DATABASE_URL=postgres://@@@######$:@@@######$@database/mailmandb - SECRET_KEY=@@@######$ - HYPERKITTY_API_KEY=@@@######$ ports: - "127.0.0.1:8000:8000" # HTTP - "127.0.0.1:8080:8080" # uwsgi networks: mailman: database: environment: - POSTGRES_DB=@@@######$ - POSTGRES_USER=@@@######$ - POSTGRES_PASSWORD=@@@######$ image: postgres:9.6-alpine volumes: - /opt/mailman/database:/var/lib/postgresql/data networks: mailman: networks: -------------------------------- So not sure where to go next?