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

/*
 * This Package emplements a PopMailServer that retreives and stores messages from Pop server(s)
 * The reason I wrote this program is that I use Sympatico as mail agent
 * My laptop is connected to the Internet through Cogeco
 * So in Outlook on my laptop my:
 * - POP server is Sympatico
 * - SMTP server is Cogeco
 * When the connection from Cogeco to Sympatico times out... Outlook displays an error message and stays
 * locked on it.
 * This server is built to be robust. It fetches the mail from Sympatico and stores them on the local file system
 * (it does not hang when the connection to Sympatico times out)
 * This program is now the POP server to my Outlook to which it relays the mail fetched on the real Sympatico POP
 * Server 
 */
public class PopMailServer {

	String host = "pop1.sympatico.ca";
	String username = "***********************";      // your ISP Username
	String password = "************************";     // and pasword here?
	Authenticator auth = new PopAuthenticator(username, password);
	
	int port = 955;
    Properties props;
	
	PopMailServer() {
        props = new Properties();
        props.put("mail.pop3.host", host);
        Session session =  Session.getDefaultInstance(props, auth);

//        Then make a connection to the Store with the getStore() method, 
//        passing the method the appropriate mail protocol for your server 
//        -- either "pop3" or "imap". Here's how you would make the 
//        appropriate connection to a POP3 server:

//         Get the store
        
        Store store;
        try {
           store = session.getStore("pop3");
           store.connect();
        }
        catch (Exception e) {
        	System.out.println("Connect failed: " + e);
        	return;
        }
    	System.out.println("Connect worked");

//    	Next, you need to open the Folder with the open() method. You can 
//    	open it in either Folder.READ_WRITE mode or Folder.READ_ONLY 
//    	mode. To read messages, you can use read-only, although if you 
//  	want to delete messages, you need to use READ_WRITE.

    	Folder folder;
    	try {
    		folder = store.getFolder("INBOX");
    		folder.open(Folder.READ_ONLY);
    	}
        catch (Exception e) {
        	System.out.println("Open failed: " + e);
        	return;
        }
    	System.out.println("Open worked");

//    	Connecting to the Folder gives you access to the individual 
//    	Message objects. You can use the getMessage() method to get an
//    	individual message, or as in the following example, use the
//    	getMessages() method to get all the messages: 

//    	 Get directory
    	Message[] message;
    	try {
    		message = folder.getMessages();
    	}
    	catch(Exception e) {
        	System.out.println("getMessages failed: " + e);
        	return;
        }
    	System.out.println("getMessage() worked " + message.length + " messages");
    	for(int i = 0; i < message.length; i++) {
    		Address[] addr = null;
    		String subject = null;
    		int size = 0;
    		Date date = null;
    		try {
    			addr = message[i].getFrom();
    			subject = message[i].getSubject();
    			size = message[i].getSize();
    			date = message[i].getSentDate();
    		}
    		catch(Exception e) {
    			System.out.println("Exception getInfo: " + e);
    		}
    		System.out.println(" " + (i+1) + ") " + addr[0] + "\t" + subject + "\t" + date.toString() + "\tSize:" + size);
    	}


 	}

	public static void main(String[] arg) {
		PopMailServer pms = new PopMailServer();
	}

}

import javax.mail.*;

public class PopAuthenticator  extends Authenticator {

	String username, password;
	PopAuthenticator(String username, String password) {
		this.username = username;
		this.password = password;
	}

	public PasswordAuthentication getPasswordAuthentication() {
		return new PasswordAuthentication(username, password);
	}
}

import javax.mail.*;

public class Ranger{

	public static void main(String args[]) {
		try {
			String messages[] = Ranger.getMailViaPOP();
			for(int i = 0; i < messages.length; i++){
				System.out.println(messages[i]);
			}
		} catch (MessagingException e) {
			e.printStackTrace();
		}
	}

	public static String [] getMailViaPOP() throws MessagingException {
		java.util.Properties props = new java.util.Properties();
		props.setProperty("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
		props.setProperty("mail.pop3.socketFactory.fallback", "false");
		props.setProperty("mail.pop3.socketFactory.port", "995");

		Session session = Session.getDefaultInstance(props);

		Store store = session.getStore("pop3");
		store.connect("pop.gmail.com", "user", "pass");

		Folder folder = store.getFolder("INBOX");
		folder.open(Folder.READ_ONLY);

		Message[] message = folder.getMessages();
		String [] titles = new String[message.length];
		for (int i = 0, n = message.length; i < n; i++) {
			titles[i] = message[i].getSubject();
		}
		// Close connection
		folder.close(false);
		store.close();
		return titles;
	}
}