diff --git a/program/include/rcube_smtp.inc b/program/include/rcube_smtp.inc
index fd1dff3f0..92f808bd3 100644
--- a/program/include/rcube_smtp.inc
+++ b/program/include/rcube_smtp.inc
@@ -85,10 +85,6 @@ function smtp_mail($from, $recipients, &$headers, &$body, &$response)
 
     $SMTP_CONN = new Net_SMTP($smtp_host, $smtp_port, $helo_host);
 
-    // set debugging
-    if ($CONFIG['debug_level'] & 8)
-      $SMTP_CONN->setDebug(TRUE);
-
     // try to connect to server and exit on failure
     $result = $SMTP_CONN->connect($smtp_timeout);
     if (PEAR::isError($result))