I've written a piece of 
java code where user1 sends email to user2. I'm behind a proxy and hence I'm getting a javax.mail.MessagingException. How do I solve this problem?
Here is the code-
import 
java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class Mail {
public static void main(String[] args) {
    final String username = "
[email protected]";
    final String password = "abc";
    Properties props = new Properties();
            props = System.getProperties();
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.port", "587");
    Session session = Session.getInstance(props,
      new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
      });
    try {
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("
[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("
[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("Dear Mail Crawler,"
            + "\n\n No spam to my email, please!");
        Transport.send(message);
        System.out.println("Done");
    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}
}