Sample Code Java Mail POP3

//Import These Classes

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.MimeBodyPart;


String HOST = "pop.mail.yahoo.com";
  String USERNAME = "";
  String PASSWORD = "";

  // Mail Test

  Folder folder = null;
  Store store = null;
  try {
  Properties props = new Properties();
  props.put("mail.store.protocol", "pop3"); 
// Google uses POP3S not POP3
  Session session = Session.getDefaultInstance(props);
  // session.setDebug(true);
  store = session.getStore();
  store.connect(HOST, USERNAME, PASSWORD);
  folder = store.getDefaultFolder().getFolder("SENT");
  folder.open(Folder.READ_ONLY);
  Message[] messages = folder.getMessages();
  //System.out.println("No of Messages : " + folder.getMessageCount());
  //System.out.println("No of Unread Messages : "
  //  + folder.getUnreadMessageCount());
  for (int i = 0; i < messages.length; ++i) {
   //System.out.println("MESSAGE #" + (i + 1) + ":");
   Message msg = messages[i];
   String from = "unknown";
   if (msg.getReplyTo().length >= 1) {
    from = msg.getReplyTo()[0].toString();
   } else if (msg.getFrom().length >= 1) {
    from = msg.getFrom()[0].toString();
   }
   //String subject = msg.getSubject();
   //System.out.println("Saving ... " + subject + " " + from);
   // you may want to replace the spaces with "_"
   // the files will be saved into the TEMP directory
                        //Use msg.getContent() to fetch and manage the contents
System.out.println("From # "+msg.getFrom()[0].toString());
   }
  } catch (MessagingException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } finally {
   if (folder != null) {
    try {
     folder.close(true);
    } catch (MessagingException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
   if (store != null) {
    try {
     store.close();
    } catch (MessagingException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
  }