/**
  * Remove the specified resource from storage.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function destroy($userId, $smtpId)
 {
     $smtp = Smtp::whereCustomerId($userId)->whereId($smtpId)->first();
     if ($smtp) {
         $smtp->delete();
     }
 }