diff --git a/static/js/feature_flags.js b/static/js/feature_flags.js
index 3b9923dda0..194dd4633f 100644
--- a/static/js/feature_flags.js
+++ b/static/js/feature_flags.js
@@ -43,7 +43,7 @@ exports.left_side_userlist = page_params.staging ||
 // Still very beta:
 exports.fade_users_when_composing = page_params.staging || is_customer4;
 exports.use_socket = page_params.staging;
-
+exports.notify_on_send_not_in_view = false;
 
 // Still burning in...
 exports.mark_read_at_bottom = true;
diff --git a/static/js/notifications.js b/static/js/notifications.js
index d1a4181ab7..a8418738bf 100644
--- a/static/js/notifications.js
+++ b/static/js/notifications.js
@@ -374,7 +374,7 @@ exports.received_messages = function (messages) {
 };
 
 exports.possibly_notify_new_messages_outside_viewport = function (messages) {
-    if (page_params.domain !== "zulip.com") {
+    if (!feature_flags.notify_on_send_not_in_view) {
         return;
     }
     _.each(messages, function (message) {
@@ -418,7 +418,7 @@ exports.possibly_notify_new_messages_outside_viewport = function (messages) {
 // for callback when we have to check with the server if a message should be in
 // the current_msg_list (!can_apply_locally; a.k.a. "a search").
 exports.notify_messages_outside_current_search = function (messages) {
-    if (page_params.domain !== "zulip.com") {
+    if (!feature_flags.notify_on_send_not_in_view) {
         return;
     }
     _.each(messages, function (message) {