无法使用 IMAP 提取纯文本邮件内容

我正在使用IMAP函数从特定邮件ID读取邮件。但是我无法阅读plain text邮件的邮件内容。它非常适合HTML Mails.运行代码后，所有邮件plain text都保持未读状态，html邮件标记为已读，其他内容如发件人邮件ID和我可以阅读的主题。唯一的问题是阅读内容。这是我尝试过的代码

    include('imap.php');
    $hostname = '{xxx.org:143/novalidate-cert}INBOX';
    $username = 'xxx-xxx@xx.org';
    $password = 'xxxxx';
    $inbox = imap_open($hostname,$username,$password) or die('Cannot connect to : ' . imap_last_error());
    $emails = imap_search($inbox,'UNSEEN');
    if($emails) {
      $output = '';
      rsort($emails);
      foreach($emails as $email_number) {
        $structure = imap_fetchstructure($inbox, $email_number); 
            $savedir = dirname(__FILE__).'/uploads/';
                    $attachments = array();
                    if(isset($structure->parts) && count($structure->parts)) {
                        for($i = 0; $i < count($structure->parts); $i++) {
                            $attachments[$i] = array(
                                'is_attachment' => false,
                                'filename' => '',
                                'name' => '',
                                'attachment' => ''
                            );
                            if($structure->parts[$i]->ifdparameters) {
                                foreach($structure->parts[$i]->dparameters as $object) {
                                    if(strtolower($object->attribute) == 'filename') {
                                        $attachments[$i]['is_attachment'] = true;
                                        $attachments[$i]['filename'] = $object->value;
                                    }
                                }
                            }
                            if($structure->parts[$i]->ifparameters) {
                                foreach($structure->parts[$i]->parameters as $object) {
                                    if(strtolower($object->attribute) == 'name') {
                                        $attachments[$i]['is_attachment'] = true;
                                        $attachments[$i]['name'] = $object->value;
                                    }
                                }
                            }
                            if($attachments[$i]['is_attachment']) {
                                $attachments[$i]['attachment'] = imap_fetchbody($inbox, $email_number, $i+1);
                                if($structure->parts[$i]->encoding == 3) { // 3 = BASE64
                                    $attachments[$i]['attachment'] = base64_decode($attachments[$i]['attachment']);
                                }
                                elseif($structure->parts[$i]->encoding == 4) { // 4 = QUOTED-PRINTABLE
                                    $attachments[$i]['attachment'] = quoted_printable_decode($attachments[$i]['attachment']);

                                }
                                 $savepath = $savedir . $attachments[$i]['filename'];
                                file_put_contents($savepath, $attachments[$i]['attachment']);
                            }
                        }
                    }


                $name = $structure->parts[1]->dparameters[0]->value; 
                $overview = imap_fetch_overview($inbox,$email_number,0);
                 $msg = imap_fetchbody($inbox,$email_number,1.2); 
                 $message='';
                if($msg=='')
                {
                    $message = imap_fetchbody($inbox,$email_number,2.0);

                }else{
                 $message=$msg;
                 }

                 $sub=$overview[0]->subject;
                  $from=$overview[0]->from;
                  $arr = explode('<', $from);
                    $from_mail = $arr[1];
                    if($from_mail!='')
                    {
                        $from=str_replace('>','',$from_mail);
                    }

               $randstr='';
               srand((double)microtime()*1000000);
               $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
               while(strlen($randstr)<5) {
                  $randstr.=substr($chars,(rand()%(strlen($chars))),1);
               } 

任何人请帮助我...提前致谢