如何编写java程序从任何emailid读取新邮件

嗨,我想写一个java程序,我将提供我的电子邮件id和密码。我想阅读所有新的未读邮件到达该电子邮件id。我不知道如何编写程序。

下面的程序适用于gmail。但它不适用于yahoomail,因为没有配置yahoo的pop3。我想要一个通用代码,这将适用于所有电子邮件id。

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

public class ReadMail {

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



//        String host = "pop.gmail.com";
//        String user = "xyz";
//        String password = "12345";

        // Get system properties
       Properties properties = System.getProperties();

        // Get the default Session object.
        Session session = Session.getDefaultInstance(properties, null);

        // Get a Store object that implements the specified protocol.
        Store store = session.getStore("pop3s");

        //Connect to the current host using the specified username and password.
        store.connect(host, user, password);

        //Create a Folder object corresponding to the given name.
        Folder folder = store.getFolder("inbox");

        // Open the Folder.
        folder.open(Folder.READ_ONLY);

        Message[] message = folder.getMessages();

        // Display message.
        for (int i = 0; i < message.length; i++) {

            System.out.println("------------ Message " + (i + 1) + " ------------");

            System.out.println("SentDate : " + message[i].getSentDate());
            System.out.println("From : " + message[i].getFrom()[0]);
            System.out.println("Subject : " + message[i].getSubject());
            System.out.print("Message : ");

            InputStream stream = message[i].getInputStream();
            while (stream.available() != 0) {
                System.out.print((char) stream.read());
            }
            System.out.println();
        }

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