Java/Email/Email Client

Java Mail POP3 Client

 
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    String host = "yourHost.edu";
    String username = "userName";
    String password = "mypassword";
    String provider = "pop3";
    Session session = Session.getDefaultInstance(props, null);
    Store store = session.getStore(provider);
    store.connect(host, username, password);
    Folder inbox = store.getFolder("INBOX");
    if (inbox == null) {
      System.out.println("No INBOX");
      System.exit(1);
    }
    inbox.open(Folder.READ_ONLY);
    Message[] messages = inbox.getMessages();
    for (int i = 0; i < messages.length; i++) {
      System.out.println("Message " + (i + 1));
      messages[i].writeTo(System.out);
    }
    inbox.close(false);
    store.close();
  }
}

Java Mail Secure POP3 Client

 
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Store;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    String host = "yourserver.edu";
    String provider = "pop3";
    Session session = Session.getDefaultInstance(props, new MailAuthenticator());
    Store store = session.getStore(provider);
    store.connect(host, null, null);
    Folder inbox = store.getFolder("INBOX");
    if (inbox == null) {
      System.out.println("No INBOX");
      System.exit(1);
    }
    inbox.open(Folder.READ_ONLY);
    Message[] messages = inbox.getMessages();
    for (int i = 0; i < messages.length; i++) {
      System.out.println("Message " + (i + 1));
      messages[i].writeTo(System.out);
    }
    inbox.close(false);
    store.close();
  }
}
class MailAuthenticator extends Authenticator {
  public MailAuthenticator() {
  }
  public PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication("username", "password");
  }
}

Send E-Mail

 
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class SendApp {
  public static void send(String smtpHost, int smtpPort, String from, String to, String subject,
      String content) throws AddressException, MessagingException {
    java.util.Properties props = new java.util.Properties();
    props.put("mail.smtp.host", smtpHost);
    props.put("mail.smtp.port", "" + smtpPort);
    Session session = Session.getDefaultInstance(props, null);
    Message msg = new MimeMessage(session);
    msg.setFrom(new InternetAddress(from));
    msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
    msg.setSubject(subject);
    msg.setText(content);
    Transport.send(msg);
  }
  public static void main(String[] args) throws Exception {
    send("hostname", 25, "j@s.ru", "s@s.ru", "re: dinner", "body");
  }
}