Erro no JavaMail

/*
 * Created on 25/12/2006
 * Mateus Avelar
 *
 *
 */
package send_mail_almaviva;

import java.awt.AWTException;
import java.io.IOException;
import java.util.Properties;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.swing.JOptionPane;


/**
 * @author Mateus  Avelar
 * Classe responsavel pelo envio do e-mail
 *
 *
 */
public class Send_mail {
   

    public static boolean trava_anexo=Criar_mail.trava_anexo; //verificar se há ou nao anexo a ser enviado

    public static String attach=Criar_mail.url_arquivo; // caminho do arquivo do anexo

	private static final String SMTP_HOST_NAME = "gmail-smtp.l.google.com"; // servidor de smtp

	private static final String SMTP_AUTH_USER = "##########@gmail.com"; //usuario de autenticaçao

	private static final String SMTP_AUTH_PWD = "######"; //senha de altenticaçao

	public static String emailMsgTxt = Criar_mail.mensagem; // corpo da mensagem

	public static String emailSubjectTxt = Criar_mail.subject;// assunto do e-mail

	private static final String emailFromAddress = "#########@gmail.com"; // remetente

	public static String[] emailList = {"######@hotmail.com","########@gmail.com" }; // email de todos os destinatarios

	public static void main(String args[]) throws Exception {
            System.out.println("main");
		Send_mail smtpMailSender = new Send_mail();
		smtpMailSender.postMail(emailList, emailSubjectTxt, emailMsgTxt,
				emailFromAddress);
		System.out.println("ENVIO CONCLUIDO A TODOS -main-");

	}

	public void postMail(String recipients[], String subject, String message,
	String from) throws MessagingException {
		boolean debug = false;
		java.security.Security
				.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
        //Configurando a conexao com o gmail
		Properties props = new Properties();
		props.put("mail.transport.protocol", "smtp");
		props.put("mail.smtp.starttls.enable","true");
		props.put("mail.smtp.host", SMTP_HOST_NAME);
		props.put("mail.smtp.auth", "true");

		Authenticator auth = new SMTPAuthenticator();
		Session session = Session.getDefaultInstance(props, auth);

		session.setDebug(debug);

		// ciando a mensagem
		Message msg = new MimeMessage(session);
        // configurando os parametros to e from....
		InternetAddress addressFrom = new InternetAddress(from);
		msg.setFrom(addressFrom);

		InternetAddress[] addressTo = new InternetAddress[recipients.length];
		for (int i = 0; i < recipients.length; i++) {
			addressTo[i] = new InternetAddress(recipients[i]);
		}
		msg.setRecipients(Message.RecipientType.TO, addressTo);



		//
		msg.setSubject(subject);
		msg.setContent(message, "text/html");


        if (trava_anexo==true){
        //enviando anexo

             MimeBodyPart mbp = new MimeBodyPart();
             DataSource fds = new FileDataSource(attach);
             mbp.setDisposition(Part.ATTACHMENT);
             mbp.setDataHandler(new DataHandler(fds));
             mbp.setFileName(fds.getName());
             Multipart mp = new MimeMultipart();
             MimeBodyPart mbp1 = new MimeBodyPart();
             mbp1.setText(message);
             mp.addBodyPart(mbp1);
             mp.addBodyPart(mbp);
             msg.setContent(mp);

        }else{

          Multipart mp = new MimeMultipart();
          MimeBodyPart mbp1 = new MimeBodyPart();
          mbp1.setText(message);
          mp.addBodyPart(mbp1);
          msg.setContent(mp);
        // enviando mensagem sem anexo.
        }

		Transport.send(msg);
        System.out.println("enviado...");
    }

    void show() throws MessagingException, InterruptedException {
        System.out.println("show");
        SysTray.sending();
        SysTray.pop();
        Send_mail smtpMailSender = new Send_mail();
		smtpMailSender.postMail(emailList, emailSubjectTxt, emailMsgTxt,
				emailFromAddress);
		System.out.println("ENVIO CONCLUIDO A TODOS -show-");
        SysTray.refresh();
        Thread.sleep(1000);
    }

	/**
	 * autenticaçao no server do gmail

	 */
	private class SMTPAuthenticator extends javax.mail.Authenticator {

		public PasswordAuthentication getPasswordAuthentication() {
			String username = SMTP_AUTH_USER;
			String password = SMTP_AUTH_PWD;
			return new PasswordAuthentication(username, password);
		}
	}
}