Java Mail API消息格式

Question

我有一个用Java发送邮件的代码，看起来像下面的代码：

  String to = "to@gmail.com";  
  String from = "from@gmail.com";  
  String host = "localhost";

//Get the session object  
  Properties properties = System.getProperties();  
  properties.setProperty("mail.smtp.host", host);  
  Session session = Session.getDefaultInstance(properties);  

 //compose the message  
  try{  
     MimeMessage message = new MimeMessage(session);  
     message.setFrom(new InternetAddress(from));  
     message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));  
     message.setSubject("Ping");  
     message.setText("Hello, this is example of sending email  ");  

     // Send message  
     Transport.send(message);  
     System.out.println("message sent successfully....");  

  }catch (MessagingException mex) {mex.printStackTrace();}  

有什么方法可以格式化我发送的消息，例如更改文本颜色或使某些文本变为粗体等。