JavaMail 在服务器2003上发送不了邮件

private void sendMail(Hashtable gz){
        String m_strContent = "<p><table><tr><td>Hello javaMail and test example!</td></tr></table></p>";
        Properties provs = new Properties();
        Authenticator auth = new MyAuthenticator(username,password);
        provs.put("mail.smtp.host", host);
        provs.put("mail.smtp.auth", "true");
        provs.put("mail.transport.protocol", "smtp");
        provs.put("mail.smtp.port", "25");
        Session session = Session.getDefaultInstance(provs,null);
        session.setDebug(true);
        MimeMessage message = new MimeMessage(session);
        try {
            message.setSubject("test javaMail");//jtfsubject.getText()
            message.setSentDate(new Date());
            message.setContext("Test Mail","text/html");

        } catch (IOException ex) {
            Logger.getLogger(TestSendMail.class.getName()).log(Level.SEVERE, null, ex);
        } catch (MessagingException ex) {
            Logger.getLogger(TestSendMail.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            Address toAddress = new InternetAddress(mailAddress);//yuping159@gmail.com
            Address fromAddress = new InternetAddress("87523774@qq.com");
            Address reply = new InternetAddress("56545465@qq.com");
            message.setReplyTo(new Address[]{reply});
    
            message.setFrom(fromAddress);
            message.setRecipients(RecipientType.TO, new Address[]{toAddress});
            message.saveChanges(); // implicit with send()
           Transport transport = session.getTransport("smtp");
            transport.connect(host, username, password);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
        }catch(AuthenticationFailedException e){
            JOptionPane.showMessageDialog(null, "密码错误");
        } catch (AddressException ex) {
            Logger.getLogger(TestSendMail.class.getName()).log(Level.SEVERE, null, ex);
        } catch(SMTPSendFailedException e){
            JOptionPane.showMessageDialog(null, "邮件发送失败");
        } catch (MessagingException ex) {
            Logger.getLogger(TestSendMail.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

 

 

 

以上代码是使用javaMail发送邮件的，在本地测试通过，可以发送邮件，但是到2003服务器上就不行了，本人不清楚，这个smtp服务一定要开通吗，或者说和2003系统有哪些问题？2003系统没有打sp2补丁包，IIS服务中没有选择安装smtp Service这服务。

 

本人做的测试是，在本人的机器xp上，即使把smtp Service 服务部打钩，重新配置IIS，还是可以发送smtp邮件.

 

请问大侠，请提供思路，问题有可能出现在哪里？

本人QQ:87523774;

万分感谢！！！！！！！

 

补充说明，和代码没有什么联系，应该重smtp服务的环境考虑。