MySQL support

postfix/mysql_virtual_alias_maps.cf

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+# 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