邮件转到垃圾邮件文件夹，使用codeigniter，服务器是godaddy，它不重复

Question

这是我的代码，我已经尝试了12个小时，但没有找到解决方案。我的电子邮件转到垃圾邮件文件夹，它应该转到收件箱。你能改正吗？

问题可能在于smtp细节，这段代码在开发服务器上运行正常，但是当我们转移到客户端服务器并更新smtp时，它显示邮件进入垃圾邮件文件夹的问题。

public function step4()
{
       parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
       $data['trip'] = $this->input->xss_clean($_GET['trip']);
       $data['travel_date'] = $this->input->xss_clean($_GET['travel_date']);
       $data['origin_id'] = $this->input->xss_clean($_GET['origin_id']);
       $data['destination_id'] = $this->input->xss_clean($_GET['destination_id']);
       $data['origin'] = $this->input->xss_clean($_GET['origin']);
       $data['destination'] = $this->input->xss_clean($_GET['destination']);
       $fees = count(explode(',',substr($this->input->xss_clean($_GET['checkbox']),0,-1)));
       $data['price'] = $this->input->xss_clean($_GET['price']);
       $data['bus_id'] = $this->input->xss_clean($_GET['bus_id']);
       $data['timing'] = $this->input->xss_clean($_GET['timing']);
       $data['duration'] = $this->input->xss_clean($_GET['duration']);
       $data['kilometers'] = $this->input->xss_clean($_GET['kilometers']);
       $data['stops'] = $this->input->xss_clean($_GET['stops']);
       $data['route_id'] = $this->input->xss_clean($_GET['route_id']);
       $data['time_id'] = $this->input->xss_clean($_GET['time_id']);

       $data['checkbox'] = $this->input->xss_clean($_GET['checkbox']);
       // print_r(explode(',',substr($data['checkbox'],0,-1)));

       $data['name'] = $this->input->xss_clean($_GET['name']);
       $data['contact'] = $this->input->xss_clean($_GET['contact']);
       $data['email'] = $this->input->xss_clean($_GET['email']);
       $data['pickup_place'] = $this->input->xss_clean($_GET['pickup_place']);
       $data['session_id'] = $this->session->userdata('session_id');
       $data['ref_code'] = $this->input->xss_clean($_GET['ref_code']);
       if($this->input->xss_clean($_GET['trip'])=="Round Trip"){
            $data['return_date'] = $this->input->xss_clean($_GET['return_date']);
            $data['return_origin_id'] = $this->input->xss_clean($_GET['destination']);
            $data['return_destination_id'] = $this->input->xss_clean($_GET['origin']);
            $fee_return = count(explode(',',substr($this->input->xss_clean($_GET['checkbox_return']),0,-1)));
            $data['return_price'] = $this->input->xss_clean($_GET['return_price']);
            $data['return_bus_id'] = $this->input->xss_clean($_GET['return_bus_id']);
            $data['return_timing'] = $this->input->xss_clean($_GET['return_timing']);
            $data['return_duration'] = $this->input->xss_clean($_GET['return_duration']);
            $data['return_kilometers'] = $this->input->xss_clean($_GET['return_kilometers']);
            $data['return_stops'] = $this->input->xss_clean($_GET['return_stops']);
            $data['return_route_id'] = $this->input->xss_clean($_GET['return_route_id']);
            $data['return_time_id'] = $this->input->xss_clean($_GET['return_time_id']);

            $data['checkbox_return'] = $this->input->xss_clean($_GET['checkbox_return']);
            $data['total_price'] = $this->input->xss_clean($_GET['total_price']);
        }
        if($this->input->xss_clean($_GET['trip'])=="Round Trip"){
            $data['fee'] = count(explode(',',substr($data['checkbox'],0,-1))+explode(',',substr($data['checkbox_return'],0,-1)))*1;
        } else { 
            $data['fee'] =  count(explode(',',substr($data['checkbox'],0,-1)))*1;
        }

        $name=$this->input->xss_clean($_GET['name']);
        $email=$this->input->xss_clean($_GET['email']);  
        $pickup_place=$this->input->xss_clean($_GET['pickup_place']);  
        $contact=$this->input->xss_clean($_GET['contact']);
        $pickup_id=$data['pickup_place'][1];
        $data['step_four'] = $this->select_seat_model->insert_select_seat($name, $email,  $pickup_place,  $contact,  $data);
        $data['reservation'] = $this->select_seat_model->getReservation($route_id);
        $data['pickup'] = $this->select_seat_model->getPickupName($pickup_id);
        //$this->session->set_userdata($array);     

        $config['protocol'] = 'smtp';
        $config['smtp_host'] = 'localhost';
        $config['smtp_port'] = 25;
        $config['smtp_user'] = 'new_psdxpress@psdxpress.com';
        $config['smtp_pass'] = 'X52udnHGgD6P';
        $config['mailtype'] = 'html';
        $config['charset'] = 'iso-8859-1';
        $config['wordwrap'] = TRUE;
        // Load email library and passing configured values to email library 
        $this->load->library('email', $config);
        $this->email->set_newline("\r\n");
        // Sender email address
        $this->email->from('noreply@psdxpress.com', 'no reply');
        // Receiver email address
        $this->email->to('akramalibikaner@gmail.com',$this->input->post('email'));
        // Subject of email
        $this->email->subject('E-ticket');
        // Message in email
        $body = $this->load->view('e-ticket.php',$data,TRUE);
        $this->email->message($body);


        $ok = $this->email->send();


        if($ok=1) {
            $this->session->set_flashdata('msg','E-ticket sent on your mail'); 
            $this->load->view('step4.php');
        } else {
            $this->session->set_flashdata("msg","Error in sending Email."); 
            $this->load->view('dashboard');
        }

    }