1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 39d2bee8da..f7ae369a1d 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -1068,6 +1068,10 @@ class FederationHandler(BaseHandler):
         """
         event = pdu
 
+        is_blocked = yield self.store.is_room_blocked(event.room_id)
+        if is_blocked:
+            raise SynapseError(403, "This room has been blocked on this server")
+
         event.internal_metadata.outlier = True
         event.internal_metadata.invite_from_remote = True