[Rspamd] Do not quaratine if symbol is GLOBAL_X_BL

data/conf/rspamd/local.d/metadata_exporter.conf

@@ -2,7 +2,7 @@ rules {
   QUARANTINE {
     backend = "http";
     url = "http://nginx:9081/pipe.php";
-    selector = "is_reject";
+    selector = "reject_no_global_bl";
     formatter = "default";
     meta_headers = true;
   }
@@ -22,5 +22,14 @@ return function(task)
   end
   return false
 end
+EOD;
+  reject_no_global_bl = <<EOD
+return function(task)
+  if not task:has_symbol('GLOBAL_SMTP_FROM_BL') and not task:has_symbol('GLOBAL_MIME_FROM_BL') then
+    local action = task:get_metric_action('default')
+    return (action == 'reject')
+  end
+  return false
+end
 EOD;
 }