diff --git a/roles/matrix/templates/synapse/config.yml b/roles/matrix/templates/synapse/config.yml
index 2e35d91..d09a777 100644
--- a/roles/matrix/templates/synapse/config.yml
+++ b/roles/matrix/templates/synapse/config.yml
@@ -1100,7 +1100,7 @@ account_validity:
 
 # Enable 3PIDs lookup requests to identity servers from this server.
 #
-#enable_3pid_lookup: true
+enable_3pid_lookup: false
 
 # If set, allows registration of standard or admin accounts by anyone who
 # has the shared secret, even if registration is otherwise disabled.