JavaMail

package com.company;

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


public class Main{

    public static void receiveEmail(String pop3Host, String storeType,
                                    String user, String password) {
        try {
            //1) get the session object
            Properties properties = new Properties();
            properties.put("mail.imap.host", "imap.gmail.com");
            properties.put("mail.imap.port", "993");
            properties.put("mail.imap.ssl.enable", "true");

            Session emailSession = Session.getInstance(properties);

            Store emailStore = emailSession.getStore("imaps");
            emailStore.connect(pop3Host,993,user, password);



            //3) create the folder object and open it
            Folder emailFolder = emailStore.getFolder("INBOX");
            emailFolder.open(Folder.READ_ONLY);

            //4) retrieve the messages from the folder in an array and print it
            Message[] messages = emailFolder.getMessages();
            for (int i = 0; i < messages.length; i++) {
                Message message = messages[i];
                System.out.println("---------------------------------");
                System.out.println("Email Number " + (i + 1));
                System.out.println("Subject: " + message.getSubject());
                System.out.println("From: " + message.getFrom()[0]);
                System.out.println("Text: " + message.getContent().toString());
            }

            //5) close the store and folder objects
            emailFolder.close(false);
            emailStore.close();

        } catch (NoSuchProviderException e) {e.printStackTrace();}
        catch (MessagingException e) {e.printStackTrace();}
        catch (IOException e) {e.printStackTrace();}
    }

    public static void main(String[] args) {

        String host = "imap.gmail.com";//change accordingly
        String mailStoreType = "pop3s";
        String username= "****";
        String password= "****";//change accordingly

        receiveEmail(host, mailStoreType, username, password);

    }
}