diff --git a/extend/phpmailer/PHPMailer.php b/extend/phpmailer/PHPMailer.php
index 4de1470cafee3fc5b5058351ce95a070956dc378..0d38879bc96153b892f83528087feb957e3a5fff 100644
--- a/extend/phpmailer/PHPMailer.php
+++ b/extend/phpmailer/PHPMailer.php
@@ -28,7 +28,7 @@ namespace phpmailer;
  * @author  Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
  * @author  Brent R. Matzelle (original founder)
  */
-class PHPMailer extends think\Exception
+class PHPMailer
 {
     const CHARSET_ISO88591 = 'iso-8859-1';
     const CHARSET_UTF8 = 'utf-8';
@@ -1772,7 +1772,7 @@ class PHPMailer extends think\Exception
     {
         $bad_rcpt = [];
         if (!$this->smtpConnect($this->SMTPOptions)) {
-            throw new Exception($this->lang('smtp_connect_failed'), self::STOP_CRITICAL);
+            throw new \Exception($this->lang('smtp_connect_failed'), self::STOP_CRITICAL);
         }
         //Sender already validated in preSend()
         if ('' == $this->Sender) {