Yup, in the email template file (look in the webassist/email/templates folder) edit the remove array near the top:
$remove = array();
$remove[] = "";
$remove[] = "x";
$remove[] = "y";
and add the id element:
$remove = array();
$remove[] = "";
$remove[] = "x";
$remove[] = "y";
$remove[] = "id";