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);
??????? }
??? }
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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。
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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.
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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！！！！！！！
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补充说明，和代码没有什么联系，应该重smtp服务的环境考虑。
