diff --git a/Library/Sender.ts b/Library/Sender.ts
index bf24cb18..56dd9069 100644
--- a/Library/Sender.ts
+++ b/Library/Sender.ts
@@ -319,7 +319,6 @@ class Sender {
             statusCode === 403 || // Forbidden
             statusCode === 408 || // Timeout
             statusCode === 429 || // Throttle
-            statusCode === 439 || // Quota
             statusCode === 500 || // Server Error
             statusCode === 503 // Server Unavilable
         );