Email bounce handling with postfix

postfix/entrypoint.sh

@@ -32,5 +32,28 @@ 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
 
+# Configure bounce processing based on environment variable
+if [ "${ENABLE_EMAIL_BOUNCE_PROCESSING:-false}" = "true" ]; then
+    echo "Email-based bounce processing enabled"
+    # Regenerate aliases database to enable bounce processing
+    newaliases
+    chmod 644 /etc/aliases /etc/aliases.db
+    
+    # Generate smtp generic maps to ensure bounces come to our bounce address
+    postmap /etc/postfix/smtp_generic
+    chmod 644 /etc/postfix/smtp_generic /etc/postfix/smtp_generic.db
+    echo "Configured return path rewriting to bounces@lists.sasalliance.org"
+else
+    echo "Email-based bounce processing disabled"
+    # Create minimal aliases without bounce processing
+    echo "postmaster: root" > /etc/aliases
+    echo "root: postmaster" >> /etc/aliases
+    newaliases
+    
+    # Disable smtp generic maps
+    echo "# Email bounce processing disabled" > /etc/postfix/smtp_generic
+    postmap /etc/postfix/smtp_generic
+fi
+
 # Start Postfix in foreground
 exec postfix start-fg