diff --git a/src/SMTP.php b/src/SMTP.php
index cc1711d2..c77c2bab 100644
--- a/src/SMTP.php
+++ b/src/SMTP.php
@@ -682,7 +682,6 @@ class SMTP
      */
     public function close()
     {
-        $this->setError('');
         $this->server_caps = null;
         $this->helo_rply = null;
         if (is_resource($this->smtp_conn)) {