diff --git a/program/steps/mail/show.inc b/program/steps/mail/show.inc
index a9dbced90..69b30eb4d 100644
--- a/program/steps/mail/show.inc
+++ b/program/steps/mail/show.inc
@@ -29,7 +29,7 @@ if ($uid = get_input_value('_uid', RCUBE_INPUT_GET)) {
   if (empty($MESSAGE->headers)) {
     rcmail_message_error($uid);
   }
-sleep(5);
+
   send_nocacheing_headers();
 
   $mbox_name = $IMAP->get_mailbox_name();