diff --git a/colab/accounts/utils/mailman.py b/colab/accounts/utils/mailman.py
index a627d34..7e868df 100644
--- a/colab/accounts/utils/mailman.py
+++ b/colab/accounts/utils/mailman.py
@@ -91,7 +91,10 @@ def mailing_lists(**kwargs):
 
 def is_private_list(name):
     try:
-        return dict(all_lists(private=True))[name]
+        privacy = {}
+        privacy.update({mlist.get('listname'): mlist.get('archive_private')
+                        for mlist in all_lists()})
+        return privacy[name]
     except KeyError:
         return []
 
diff --git a/colab/super_archives/views.py b/colab/super_archives/views.py
index fc8c706..23c7b44 100644
--- a/colab/super_archives/views.py
+++ b/colab/super_archives/views.py
@@ -33,17 +33,23 @@ class ThreadView(View):
         thread = get_object_or_404(Thread, subject_token=thread_token,
                                    mailinglist__name=mailinglist)
 
-        # TODO: Refactor this code
-        # Use local flag is_private instead of always check the API!!
-        all_privates = dict(mailman.all_lists(private=True))
-        if all_privates[thread.mailinglist.name]:
+        all_privates = []
+        all_privates.extend(
+            [mlist.get('listname')
+                for mlist in mailman.all_lists()
+                if mlist.get('archive_private')]
+        )
+
+        if all_privates.count(thread.mailinglist.name):
             if not request.user.is_authenticated():
                 raise PermissionDenied
             else:
                 user = User.objects.get(username=request.user)
                 emails = user.emails.values_list('address', flat=True)
                 lists_for_user = mailman.get_user_mailinglists(user)
-                if thread.mailinglist.name not in lists_for_user:
+                listnames_for_user = [mlist.get("listname")
+                                      for mlist in lists_for_user]
+                if thread.mailinglist.name not in listnames_for_user:
                     raise PermissionDenied
 
         thread.hit(request)
--
libgit2 0.21.2