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esh_mailcow/templates/default/docker-compose.override.yml.erb

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+##
+## Set haproxy_trusted_networks in Dovecots extra.conf!
+##
+
+services:
+
+    dovecot-mailcow:
+      ports:
+        - "${IMAP_PORT_HAPROXY:-0.0.0.0:10143}:10143"
+        - "${IMAPS_PORT_HAPROXY:-0.0.0.0:10993}:10993"
+        - "${POP_PORT_HAPROXY:-0.0.0.0:10110}:10110"
+        - "${POPS_PORT_HAPROXY:-0.0.0.0:10995}:10995"
+        - "${SIEVE_PORT_HAPROXY:-0.0.0.0:14190}:14190"
+
+    postfix-mailcow:
+      ports:
+        - "${SMTP_PORT_HAPROXY:-0.0.0.0:10025}:10025"
+        - "${SMTPS_PORT_HAPROXY:-0.0.0.0:10465}:10465"
+        - "${SUBMISSION_PORT_HAPROXY:-0.0.0.0:10587}:10587"
+      environment:
+        - MAILCOW_HOSTNAME=<%= @mailcow_hostname %>
+

esh_mailcow/templates/default/main.cf.erb

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+# See /usr/share/postfix/main.cf.dist for a commented, more complete version
+
+
+# Debian specific:  Specifying a file name will cause the first
+# line of that file to be used as the name.  The Debian default
+# is /etc/mailname.
+#myorigin = /etc/mailname
+
+smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
+biff = no
+
+# appending .domain is the MUA's job.
+append_dot_mydomain = no
+
+# Uncomment the next line to generate "delayed mail" warnings
+#delay_warning_time = 4h
+
+readme_directory = no
+
+# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 3.6 on
+# fresh installs.
+compatibility_level = 3.6
+
+
+
+# TLS parameters
+smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
+smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
+smtpd_tls_security_level=may
+
+smtp_tls_CApath=/etc/ssl/certs
+smtp_tls_security_level=may
+smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
+
+
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
+myhostname = <%= @fqdn %>
+alias_maps = hash:/etc/aliases
+alias_database = hash:/etc/aliases
+myorigin = /etc/mailname
+mydestination = <%= @fqdn %>, $myhostname, <%= @hostname %>, localhost.localdomain, localhost
+relayhost = 172.22.1.1
+mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
+mailbox_size_limit = 0
+recipient_delimiter = +
+inet_interfaces = loopback-only
+inet_protocols = all
+relay_transport = relay
+default_transport = smtp