使用javax.mail发送邮件时出错

Question

我使用以下代码，代码执行到message.setSubject（body1）;然后它不会抛出任何异常但直接停止执行完整的程序。与messageBodyPart.setText相同（＆＃34;嗨，状态邮件＆＃34;）;当我尝试使用setSubject注释掉时。至少它甚至不会抛出异常。可能是什么问题？

 String body1 = "TODAYS UPDATED FILES LIST";
 Properties props = new Properties();
 props.put("mail.smtp.auth", "false");
 props.put("mail.smtp.starttls.enable", "true");
 props.put("mail.smtp.host", Global.HOST);                 
 props.put("mail.smtp.port", Global.PORT);
 Session session = Session.getInstance(props);
 Message message = new MimeMessage(session);                                                                                                
          message.setFrom(new InternetAddress(EMAIL_FROM));   
          for(int i=0;i<EMAIL_TO.size();i++){

            message.addRecipient(Message.RecipientType.TO, new InternetAddress(EMAIL_TO.get(i)));
        } 
                    message.setSubject(body1);
        BodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setText("Hi, Status mail");
        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(messageBodyPart);
        messageBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(ATTATCHMENT_FILE_PATH);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(Global.ATTATCHMENT_FILE_NAME);
        multipart.addBodyPart(messageBodyPart);
        message.setContent(multipart);
        Transport transport = session.getTransport("smtp");
        transport.connect();
        Transport.send(message);
        System.out.println("Sent Mail Successfully");