javax.mail package

[sukdev painuly]

I am new mail package user.
I'm using javax.mail package to send mail through internet.I'm using proxy server on windows.But I am getting unknown smtp host exception and sendingexception .
I'm using SMTP protocol for sending mails.
My code is as follows.....................

import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
public class SendMail
{
public static void main (String args[]) throws Exception
{
String host = "mail.im.eth.net";
String from = "[e-mail]";
String to = "[e-mail]";
Properties props = System.getProperties();
props.put("mail.transport.protocol","smtp");
props.put("mail.smtp.host", host);
Session session = Session.getInstance(props,null);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
System.out.println(" setting subject and message ");
message.setSubject("hi ");
message.setText("how r u");

Transport.send(message);
System.out.println(" sent the message ");
System.out.println(" thanks ");
}
}

thanks

[Jared Krull]

Are you sure that "mail.im.eth.net" allows relaying for "[e-mail]"?
Find the SMTP server for "..rediffmail.com" and see if it works on that.