import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;


public class HeaderClient {

  public static void main(String[] args) {
    
    if (args.length == 0) {
      System.err.println(
       "Usage: java HeaderClient protocol://username@host/foldername");
      return; 
    }
    
    URLName server = new URLName(args[0]);

    try {

      Session session = Session.getDefaultInstance(new Properties(), 
       new MailAuthenticator(server.getUsername()));

      // Connect to the server and open the folder
      Folder folder = session.getFolder(server);
      if (folder == null) {
        System.out.println("Folder " + server.getFile() + " not found.");
        System.exit(1);
      }  
      folder.open(Folder.READ_ONLY);
      
      // Get the messages from the server
      Message[] messages = folder.getMessages();
      for (int i = 0; i < messages.length; i++) {
        System.out.println("------------ Message " + (i+1) 
         + " ------------");
        // Here's the big change...
        String from = InternetAddress.toString(messages[i].getFrom());
        if (from != null) System.out.println("From: " + from);
        String replyTo = InternetAddress.toString(
         messages[i].getReplyTo());
        if (replyTo != null) System.out.println("Reply-to: " 
         + replyTo);
        String to = InternetAddress.toString(
         messages[i].getRecipients(Message.RecipientType.TO));
        if (to != null) System.out.println("To: " + to);
        String cc = InternetAddress.toString(
        messages[i].getRecipients(Message.RecipientType.CC));
        if (cc != null) System.out.println("Cc: " + cc);
        String bcc = InternetAddress.toString(
         messages[i].getRecipients(Message.RecipientType.BCC));
        if (bcc != null) System.out.println("Bcc: " + to);
        String subject = messages[i].getSubject();
        if (subject != null) System.out.println("Subject: " + subject);
        Date sent = messages[i].getSentDate();
        if (sent != null) System.out.println("Sent: " + sent);
        Date received = messages[i].getReceivedDate();
        if (received != null) System.out.println("Received: " + received);
        
        System.out.println();
      } 

      // Close the connection 
      // but don't remove the messages from the server
      folder.close(false);
      
    } 
    catch (Exception e) {
      e.printStackTrace();
    }  
          
    // Since we may have brought up a GUI to authenticate,
    // we can't rely on returning from main() to exit
    System.exit(0);     
    
  }

}