diff --git a/smtp.php b/smtp.php
index cf782e1..fea5465 100644
--- a/smtp.php
+++ b/smtp.php
@@ -8,6 +8,9 @@ class smtp
 {
   /** Debug mode */
   public $debug = 0;
+  /** The debug file used to store all the communication between the client and
+    * the server. The file contains the passwords if used ! */
+  public $debugFile = "/tmp/debugSMTP";
   /** The authentication user allow to send SMTP mails */
   public $user = null;
   /** The authentication password allow to send SMTP mails */
@@ -171,6 +174,6 @@ class smtp
       return;
     if ($priority > $this->debug)
       return;
-    file_put_contents ("/tmp/debugsmtp", $message, FILE_APPEND);
+    file_put_contents ($this->debugFile, $message, FILE_APPEND);
   }
 }