amazon ec2 gmail smtp

Question

Hi,

I'm trying to send a mail using google apps smtp.

    public boolean sendMail(String email, String subject, String body, Integer port) {

    boolean sent = false;
    try {
        String host = "smtp.gmail.com";
        String from = "[email protected]";
        String pass = "password";
        Properties props = System.getProperties();
        props.put("mail.smtp.starttls.enable", "true"); // added this line
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", port);
        props.put("mail.smtp.auth", "true");

        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from, "Name"));

        InternetAddress toAddress = new InternetAddress(email);     

        message.addRecipient(Message.RecipientType.TO, toAddress);

        message.setSubject(subject);

        Multipart multipart = new MimeMultipart("related");
        BodyPart htmlPart = new MimeBodyPart();
        htmlPart.setContent(body, "text/html");
        multipart.addBodyPart(htmlPart);
        message.setContent(multipart);

        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();

        System.out.println("Mail Sent !! ");
        sent = true;
    } catch(Exception e) {
        e.printStackTrace();
    }
    return sent;
}

I've tried send the mail using ports: 25 & 587, but no luck I get the following error:

javax.mail.NoSuchProviderException: smtp
    at javax.mail.Session.getService(Session.java:782)
    at javax.mail.Session.getTransport(Session.java:708)
    at javax.mail.Session.getTransport(Session.java:651)
    at javax.mail.Session.getTransport(Session.java:631)
    at Mail.sendMail(Mail.java:67)
    at Mail.doGet(Mail.java:35)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
    at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
    at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
    at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
    at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
    at java.lang.Thread.run(Thread.java:675)

Please let me know what should I do for the mail to be sent.