diff --git a/include/class.filter.php b/include/class.filter.php
index 0d9382771e518b2a2e979f2c388e717133cb7f10..1b87fdcc7fcddbb99ded31f3c59760c7dfb88e6c 100644
--- a/include/class.filter.php
+++ b/include/class.filter.php
@@ -856,6 +856,7 @@ class TicketFilter {
             'X-Autorespond'     => '*',
             'X-Mail-Autoreply'  => '*',
             'X-Autogenerated'   => 'REPLY',
+            'X-AMAZON-MAIL-RELAY-TYPE' => 'NOTIFICATION',
         );
 
         foreach ($auto_headers as $header=>$find) {