1 files changed, 4 insertions, 2 deletions
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py
index 3ae92d1574..0e9d8ccb53 100644
--- a/synapse/push/mailer.py
+++ b/synapse/push/mailer.py
@@ -78,12 +78,12 @@ ALLOWED_ATTRS = {
 
 
 class Mailer(object):
-    def __init__(self, hs):
+    def __init__(self, hs, app_name):
         self.hs = hs
         self.store = self.hs.get_datastore()
         self.state_handler = self.hs.get_state_handler()
         loader = jinja2.FileSystemLoader(self.hs.config.email_template_dir)
-        self.app_name = self.hs.config.email_app_name
+        self.app_name = app_name
         env = jinja2.Environment(loader=loader)
         env.filters["format_ts"] = format_ts_filter
         env.filters["mxc_to_http"] = self.mxc_to_http_filter
@@ -122,6 +122,8 @@ class Mailer(object):
             user_display_name = yield self.store.get_profile_displayname(
                 UserID.from_string(user_id).localpart
             )
+            if user_display_name is None:
+                user_display_name = user_id
         except StoreError:
             user_display_name = user_id