diff --git a/mailman_sync.py b/mailman_sync.py
index 9625cd4..d103f56 100755
--- a/mailman_sync.py
+++ b/mailman_sync.py
@@ -85,10 +85,13 @@ class ListManager:
                 # ConcealSubscription | DontReceiveDuplicates
                 "new_member_options = 272",
                 "advertised = 0",
+                "subscribe_policy = 3",  # require approval to join
+                "unsubscribe_policy = 1",  #  require approval to unsubscribe
                 "private_roster = 2",  # only admins can view the roster
                 "default_member_moderation = 1",
                 "generic_nonmember_action = 3",  # discard non-member emails
                 "forward_auto_discards = 0",  # don't notify admin about discards
+                "archive_private = 1",
             ]
         )