Java Tutorial/Email/Email Header

Get Detail Header

import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.URLName;
import javax.mail.internet.InternetAddress;
public class MainClass {
  public static void main(String[] args) throws Exception {
    URLName server = new URLName("protocol://username@host/foldername");
    Session session = Session.getDefaultInstance(new Properties(), new MailAuthenticator());
    Folder folder = session.getFolder(server);
    if (folder == null) {
      System.out.println("Folder " + server.getFile() + " not found.");
      System.exit(1);
    }
    folder.open(Folder.READ_ONLY);
    Message[] messages = folder.getMessages();
    for (int i = 0; i < messages.length; i++) {
      System.out.println("Message " + (i + 1));
      System.out.println("From: " + InternetAddress.toString(messages[i].getFrom()));
      System.out.println("Reply-to: " + InternetAddress.toString(messages[i].getReplyTo()));
      String to = InternetAddress.toString(messages[i].getRecipients(Message.RecipientType.TO));
      System.out.println("To: " + to);
      String cc = InternetAddress.toString(messages[i].getRecipients(Message.RecipientType.CC));
      System.out.println("Cc: " + cc);
      String bcc = InternetAddress.toString(messages[i].getRecipients(Message.RecipientType.BCC));
      System.out.println("Bcc: " + bcc);
      System.out.println("Subject: " + messages[i].getSubject());
      System.out.println("Sent: " + messages[i].getSentDate());
      System.out.println("Received: " + messages[i].getReceivedDate());
    }
    folder.close(false);
  }
}
class MailAuthenticator extends Authenticator {
  public MailAuthenticator() {
  }
  public PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication("username", "password");
  }
}

Get Email Header

import java.util.Enumeration;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.Header;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.URLName;
public class MainClass {
  public static void main(String[] args) throws Exception {
    URLName server = new URLName("protocol://username@host/foldername");
    Session session = Session.getDefaultInstance(new Properties(), new MailAuthenticator());
    Folder folder = session.getFolder(server);
    if (folder != null) {
      folder.open(Folder.READ_ONLY);
      Message[] messages = folder.getMessages();
      for (int i = 0; i < messages.length; i++) {
        System.out.println((i + 1));
        Enumeration headers = messages[i].getAllHeaders();
        while (headers.hasMoreElements()) {
          Header h = (Header) headers.nextElement();
          System.out.println(h.getName() + ": " + h.getValue());
        }
      }
      folder.close(false);
    }
  }
}
class MailAuthenticator extends Authenticator {
  public MailAuthenticator() {
  }
  public PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication("username", "password");
  }
}