java email pop3(http://alvinalexander.com/java/javamail-pop-pop3-reader-email-inbox-example)

JavaMailPop3Reader.java

package javamailtests;

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

public class JavaMailPop3Reader {

  public static void main(String args[]) throws Exception {

    // mail server connection parameters
    String host = "pop.mail.yahoo.com";
    String user = "USERNAME";
    String password = "PASSWORD";

    // connect to my pop3 inbox
    Properties properties = System.getProperties();
    Session session = Session.getDefaultInstance(properties);
    Store store = session.getStore("pop3");
    store.connect(host, user, password);
    Folder inbox = store.getFolder("Inbox");
    inbox.open(Folder.READ_ONLY);

    // get the list of inbox messages
    Message[] messages = inbox.getMessages();

    if (messages.length == 0) System.out.println("No messages found.");

    for (int i = 0; i < messages.length; i++) {
      // stop after listing ten messages
      if (i > 10) {
        System.exit(0);
        inbox.close(true);
        store.close();
      }

      System.out.println("Message " + (i + 1));
      System.out.println("From : " + messages[i].getFrom()[0]);
      System.out.println("Subject : " + messages[i].getSubject());
      System.out.println("Sent Date : " + messages[i].getSentDate());
      System.out.println();
    }

    inbox.close(true);
    store.close();
  }
}