Ciao, questa è una classe di esempio per l'invio di una mail con javamail, spero ti può essere utile.


codice:
import java.util.Properties;
import javax.mail.Message;
import javax.mail.NoSuchProviderException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class TestMail {
	public static void main(String[] args) throws Exception {
		TestMail sender = new TestMail();
		sender.send("--- email destinatario ---", "luca");
	}

	public void send(String destinatario, String name)
	throws Exception {
		
		Properties props = new Properties();
		props.put("mail.smtp.host", "smtp.gmail.com");
		props.put("mail.smtp.socketFactory.port", "465");
		props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
		props.put("mail.smtp.auth", "true");
		props.put("mail.smtp.port", "465");
		Session session = Session.getDefaultInstance(props,	new javax.mail.Authenticator() {
			@Override
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication("x x x @gmail.com", " -- password --"); // inserire email e password
			}
		});
		try {
			Message message = new MimeMessage(session);
			message.setFrom(new InternetAddress("x x x @ gmail.com")); // mittente
			message.setRecipients(Message.RecipientType.TO,InternetAddress.parse(destinatario));
			message.setSubject("Benvenuto!!");
			message.setText("Ciao "	+ name);

			// Transport.send(message);

			Transport transport = session.getTransport("smtp");
			transport.connect("smtp.gmail.com", 465, "--- x x x @gmail.com ---", "--- password ---"); // inserire email e password
			transport.sendMessage(message, message.getAllRecipients());
			transport.close();

			System.out.println("Mail inviata con successo!");

		} catch (NoSuchProviderException e) {
			e.printStackTrace();
			throw new Exception(e);
		}
	}
}