error with mail progmming

[dmjpro]

i have no problem while i complile the program.
this is my source code ......

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
 
class MailTest1
{
        public static void main(String args[])
        {
               try
                   {
                        if(args.length == 0)
                        {
                                throw new Exception("Insufficient arguments ....");
                        }
                         String smtpServer=args[0];
                         String to=args[1];
                         String from=args[2];
                         String subject=args[3];
                         String body=args[4];
                         send(smtpServer, to, from, subject, body);
                   }
                   catch (Exception ex)
                                      {
                        System.out.println("Exception in main: " + ex.getMessage());
                   }
        }
        public static void send(String smtpServer, String to, String from
           , String subject, String body)
        {
                try
                {
                        Properties props = System.getProperties();
                        // -- Attaching to default Session, or we could start
                        props.put("mail.smtp.host", smtpServer);
                        Session session = Session.getDefaultInstance(props, nu
                        // -- Create a new message --
                        Message msg = new MimeMessage(session);
                        // -- Set the FROM and TO fields --
                        msg.setFrom(new InternetAddress(from));
                        msg.setRecipients(Message.RecipientType.TO,
                                                InternetAddress.parse(to, false));
                        // -- We could include CC recipients too --
                        // if (cc != null)
                        // msg.setRecipients(Message.RecipientType.CC
                        // ,InternetAddress.parse(cc, false));
                        // -- Set the subject and body text --
                        msg.setSubject(subject);
                        msg.setText(body);
                        // -- Set some other header information --
                        msg.setHeader("X-Mailer", "LOTONtechEmail");
                        msg.setSentDate(new Date());
                        // -- Send the message --
                        Transport.send(msg);
                        System.out.println("Message sent OK.");
                }
                catch (Exception ex)
                {
                        System.out.println("Exception in send: " + ex.getMessage());
                }
        }
}
 

but when i run the program then i get an error ......

Exception in thread "main" java.lang.NoCla ssDefFoundError : javax/mail/Message

plz help...
it's urgent

kind regards,
dmjpro.

[JosAH]

That package is supposed to be an extension so you should put that .jar in
the 'ext' directory under the lib directory of your JRE.

kind regards,

Jos

[dmjpro]

That package is supposed to be an extension so you should put that .jar in
the 'ext' directory under the lib directory of your JRE.

kind regards,

Jos

then why didn't i get the compiling error?
plz explain.

kind regards,
dmjpro.

[dmjpro]

then why didn't i get the compiling error?
plz explain.

kind regards,
dmjpro.

Ok i solved it.
but i have a new problem .. how can i get host name for a mail server... sayGMAIL server?
plz help.

kind regards,
Dmjpro.

[JosAH]

Ok i solved it.
but i have a new problem .. how can i get host name for a mail server... sayGMAIL server?
plz help.

kind regards,
Dmjpro.

You can't; your program has to "know" it in advance. There is no service that
gives you a list of smtp servers anywhere in the world.

kind regards,

Jos

[dmjpro]

You can't; your program has to "know" it in advance. There is no service that
gives you a list of smtp servers anywhere in the world.

kind regards,

Jos

so do u know those server names for common use mail serveres????
plzzz say...

kind regards,
dmjpro.

[JosAH]

so do u know those server names for common use mail serveres????
plzzz say...

kind regards,
dmjpro.

I only know the name of the smtp server supplied by my ISP.

kind regards,

Jos