Problem sending email using javamail in servlet

Question

I try this code and make some changes of my own http://forums.sun.com/thread.jspa?threadID=695781.
When i run the program the confirmtaion shows that the mail has been sent, but when i check in my inbox there's no the message. I'm using gmail and need to authenticate the username and password. I guess the error caused in the servlet.
Here's the code for my servlet :
import java.io.*;
import java.util.Properties;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.mail.internet.*;
import javax.mail.*;
public class ServletEx extends HttpServlet {
   public void doPost(HttpServletRequest request, HttpServletResponse response)
         throws IOException, ServletException {
      System.out.println("____emailservlet.doPost");
      response.setContentType("text/plain");
      PrintWriter out = response.getWriter();
      System.out.println("______________________________");
      out.println();
      String to = request.getParameter("to");
      System.out.println("____________________________to" + to);
      String subject = request.getParameter("subject");
      String msg = request.getParameter("msg");
      // construct an instance of EmailSender
      System.out.println("servlet_to" + to);
      send(username, to, subject, msg);
      //send("[email protected]", to, subject, msg);
      out.println("mail sent....");
        String username = "[email protected]";
        String password = "my_password";
        String smtp = "smtp.gmail.com";
        String port = "587";
   public void send(String username, String to, String subject, String msg) {
        Properties props = new Properties();
        props.put("mail.smtp.user", username);
        props.put("mail.smtp.host", smtp);
        props.put("mail.smtp.port", port);
        props.put("mail.smtp.starttls.enable","true"); // just in case, but not currently necessary, oddly enough
        props.put("mail.smtp.auth", "true");
        //props.put("mail.smtp.debug", "true");
        props.put("mail.smtp.socketFactory.port", port);
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");
        SecurityManager security = System.getSecurityManager();
        try
            Authenticator auth = new SMTPAuthenticator();
            Session session = Session.getInstance(props, auth);
            //session.setDebug(true);
            MimeMessage message = new MimeMessage(session);
            message.setText(msg);
            message.setSubject(subject);
            message.setFrom(new InternetAddress(username));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            Transport.send(message);
        catch (Exception mex)
            mex.printStackTrace();
   public class SMTPAuthenticator extends javax.mail.Authenticator {
        public PasswordAuthentication getPasswordAuthentication(String username, String password)
            return new PasswordAuthentication(username, password);
}Actually it's been a long time for me to develope this program, especially with the authenticate smtp. Any help would be very appreciated :)

Answer 1

Accordingly to your stackTrace, I think that you miss some utility jar from Geronimo app. server.
As you are using Application server that is J2EE compliant, so there is an own JavaMail implementation embeded and used by the Server. To fix this problem you have to find and add to your calsspath a jar-file that contains Base64EncoderStream.class