diff --git a/Core/Lib/Email/NewMail.php b/Core/Lib/Email/NewMail.php
index 0078a5832f..8646fc7d3c 100644
--- a/Core/Lib/Email/NewMail.php
+++ b/Core/Lib/Email/NewMail.php
@@ -94,6 +94,7 @@ public function __construct()
         $this->fromName = $this->empresa->nombrecorto;
 
         $this->mail = new PHPMailer();
+        $this->mail->Debugoutput = 'html';
         $this->mail->CharSet = PHPMailer::CHARSET_UTF8;
         $this->mail->Mailer = Tools::settings('email', 'mailer');