diff --git a/export_mailman2_settings.py b/export_mailman2_settings.py
index 2f13b0c..73aafb9 100644
--- a/export_mailman2_settings.py
+++ b/export_mailman2_settings.py
@@ -38,7 +38,11 @@ EXCLUDES = set((
     'digestable',
     'digest_is_default',
     'mime_is_default_digest',
-    'digest_size_threshhold'
+    'digest_size_threshhold',
+    '_new_volume',
+    '_send_digest_now',
+    'umbrella_list',
+    'umbrella_member_suffix'
 ))