发送电子邮件遇到问题

一：相关配置

   /**
     * 操作员明细报表
     */
    public function indexAction()
    {
        $service = $this->createService();

        $stocks = WmsStock::query($this->fetchSql);

        $path = SKIHAT_PATH_APP_MODULES . '/wms/docs/waring.xls';
        $subjects = "库存预警通知(".date("Ymd").")";
        $body = "您好,以下商品库存不足(详情见附件),请及时补货!邮件由系统发出,请勿回复!";
        if ($stocks) {
            $service->excel($stocks, $path);
            $service->sendMail($path, $subjects, $body);
        }
        die();
    }

/**
     * 生成excel文件
     * @param $stocks
     * @param $path
     * @throws PHPExcel_Exception
     * @throws PHPExcel_Reader_Exception
     */
    public function excel($stocks, $path)
    {
        require_once(SKIHAT_PATH_VENDOR . '/php-excel/PHPExcel.php');
        $objExcel = new PHPExcel();
        $title = '库存预警明细'; //文件标题
        $sheet = $objExcel->setActiveSheetIndex(0);
        $sheet->setCellValue('A2', '仓库名称');
        $sheet->setCellValue('B2', '仓库id');
        $sheet->setCellValue('C2', " ".'单品id');
        $sheet->setCellValue('D2', '单品名称');
        $sheet->setCellValue('E2', '品牌');

        $sheet->setCellValue('F2', '库存总量');
        $sheet->setCellValue('G2', '库存预警值');

        #合并单元格
        $objExcel->setActiveSheetIndex(0)->mergeCells('A1:I1');
        $objExcel->setActiveSheetIndex(0)->setCellValue('A1', $title);
        #设置font
        $objExcel->setActiveSheetIndex(0)->getStyle('A1')->getFont()->setSize(16);

        #设置居中（上下左右）
        $objExcel->setActiveSheetIndex(0)->getStyle('A1')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $objExcel->setActiveSheetIndex(0)->getStyle('A1')->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);
        $rows = 3;
        foreach ($stocks as $item) {
            $sheet->setCellValue("A{$rows}", $item['house_name']);
            $sheet->setCellValue("B{$rows}", $item['house_id']);
            $sheet->setCellValue("C{$rows}", $item['sku_id']);
            $sheet->setCellValue("D{$rows}", $item['sku_name']);
            $sheet->setCellValue("E{$rows}", $item['brand_name']);
            $sheet->setCellValue("F{$rows}", $item['num']);
            $sheet->setCellValue("G{$rows}", $item['stock_warn']);

            ++$rows;
        }
        $objExcel->getActiveSheet()->setTitle('SetExcelName');
        $objExcel->setActiveSheetIndex(0);
        $objWriter = PHPExcel_IOFactory::createWriter($objExcel, 'Excel5');
        $objWriter->save($path);
    }

   /**
     * 发送邮件
     * @param $path
     * @param $subjects
     * @param $body
     * @return bool
     * @throws FileNotFoundException
     * @throws phpmailerException
     */
    public function sendMail($path, $subjects, $body)
    {
        //加载文件
        Skihat::import('php-mailer.php-mailer-autoload', SKIHAT_PATH_VENDOR);

        $emails = WmsWarnEmail::fetchAll(array('status'=>1))->fetchObjects();

        $mail = new PHPMailer();

        //发送邮件服务器配置
        $mail->isSMTP();

        $mail->CharSet = "UTF-8";
        $mail->Encoding = "base64";

        $mail->Host = 'smtp.163.com';
        $mail->SMTPAuth = true;
        $mail->Username = 'xxxx@163.com'; //发件邮箱
        $mail->Password = self::PASSWORD; 
        $mail->SMTPSecure = tls;
        $mail->Port =25;

        $mail->setFrom(xxxx@163.com, 'xxxx');

       //多人发送
        foreach($emails as $key=>$val){
            $mail->addAddress("$val->warn_email");
        }

        $mail->isHTML(true);
        $mail->Subject = $subjects; //主题
        $mail->Body = $body;  //内容

        $mail->AddAttachment($path, 'xxx.xls'); //附件

        if (!$mail->send()) {
            echo "Mailer Error: " . $mail->ErrorInfo;
            return false;
        } else {
            echo "发送成功!!";
            return true;
        }
    }