MySQL support

postfix/Dockerfile

@@ -4,21 +4,22 @@ FROM debian:stable-slim
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y \
         postfix \
+        postfix-mysql \
         libsasl2-modules \
         mailutils \
         gettext-base \
+        netcat-openbsd \
         && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Copy configs
 COPY main.cf.template /etc/postfix/main.cf.template
 COPY sasl_passwd.template /etc/postfix/sasl_passwd.template
-COPY virtual_aliases.cf /etc/postfix/virtual_aliases.cf
+COPY mysql_virtual_alias_maps.cf /etc/postfix/mysql_virtual_alias_maps.cf.template
 COPY sender_access /etc/postfix/sender_access
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 
-# Generate Postfix maps for virtual aliases and sender access
-RUN postmap /etc/postfix/virtual_aliases.cf
+# Generate Postfix maps for sender access
 RUN postmap /etc/postfix/sender_access
 
 # Expose SMTP

postfix/entrypoint.sh

@@ -4,16 +4,33 @@ set -e
 # Generate main.cf from template with environment variables
 envsubst < /etc/postfix/main.cf.template > /etc/postfix/main.cf
 
+# Generate MySQL virtual alias config from template
+envsubst < /etc/postfix/mysql_virtual_alias_maps.cf.template > /etc/postfix/mysql_virtual_alias_maps.cf
+
 # Generate SASL password file from environment variables
 envsubst < /etc/postfix/sasl_passwd.template > /etc/postfix/sasl_passwd
 
+# Wait for MySQL to be ready
+echo "Waiting for MySQL to be ready..."
+for i in $(seq 1 30); do
+    if nc -z ${MYSQL_HOST} ${MYSQL_PORT} 2>/dev/null; then
+        echo "MySQL is ready!"
+        break
+    fi
+    echo "Waiting for MySQL... ($i/30)"
+    sleep 2
+done
+
 # Generate Postfix hash databases
 postmap /etc/postfix/sasl_passwd
 chmod 600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db
 
-# Regenerate sender_access database (in case of updates)
+# Regenerate sender_access database
 postmap /etc/postfix/sender_access
 chmod 644 /etc/postfix/sender_access /etc/postfix/sender_access.db
 
+# Set permissions on MySQL config
+chmod 644 /etc/postfix/mysql_virtual_alias_maps.cf
+
 # Start Postfix in foreground
 exec postfix start-fg

postfix/main.cf.template

@@ -16,8 +16,8 @@ smtp_sasl_auth_enable = yes
 smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
 smtp_sasl_security_options = noanonymous
 
-# Virtual aliases (static for now)
-virtual_alias_maps = hash:/etc/postfix/virtual_aliases.cf
+# Virtual aliases - dynamic MySQL lookup
+virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
 
 # Sender restrictions - enforce whitelist
 smtpd_sender_restrictions = 

postfix/mysql_virtual_alias_maps.cf

@@ -0,0 +1,14 @@
+# Postfix MySQL query for virtual aliases
+# This file queries the database to expand mailing list addresses to member emails
+
+# Database connection settings
+hosts = ${MYSQL_HOST}
+port = ${MYSQL_PORT}
+user = ${MYSQL_USER}
+password = ${MYSQL_PASSWORD}
+dbname = ${MYSQL_DATABASE}
+
+# Query to get recipients for a mailing list
+# Input: full email address (e.g., community@lists.sasalliance.org)
+# Output: comma-separated list of recipient emails
+query = SELECT GROUP_CONCAT(m.email SEPARATOR ', ') FROM lists l INNER JOIN list_members lm ON l.list_id = lm.list_id INNER JOIN members m ON lm.member_id = m.member_id WHERE l.list_email = '%s' AND l.active = 1 AND m.active = 1 AND lm.active = 1 GROUP BY l.list_id

postfix/virtual_aliases.cf

@@ -1 +1,11 @@
-community@lists.sasalliance.org   james@pattinson.org, james.pattinson@sasalliance.org
+# Community mailing list - general announcements
+community@lists.sasalliance.org   james@pattinson.org, james.pattinson@sasalliance.org
+
+# Board members mailing list
+board@lists.sasalliance.org   james.pattinson@sasalliance.org
+
+# All members mailing list
+members@lists.sasalliance.org   james@pattinson.org, james.pattinson@sasalliance.org
+
+# Announcements mailing list
+announcements@lists.sasalliance.org   james@pattinson.org, james.pattinson@sasalliance.org