diff --git a/app/models/mail_handler.rb b/app/models/mail_handler.rb
index 825fdf5..4b63ac5 100644
--- a/app/models/mail_handler.rb
+++ b/app/models/mail_handler.rb
@@ -73,7 +73,7 @@ class MailHandler < ActionMailer::Base
 
   cattr_accessor :ignored_emails_headers
   @@ignored_emails_headers = {
-    'X-Auto-Response-Suppress' => 'oof',
+    'X-Auto-Response-Suppress' => /(oof|all)/,
     'Auto-Submitted' => /\Aauto-(replied|generated)/,
     'X-Autoreply' => 'yes'
   }