Javamail API problem

Question

I recently downloaded the javamail 1.4 api, nd tried testing the demo code sendmsgsample.java. It gave me the following error -
C:\jdk1.3\bin\msgsendsample.java:78: cannot access javax.mail.Session
bad class file: C:\javamail1.4\lib\mailapi.jar(javax/mail/Session.class)
class file has wrong version 48.0, should be 47.0Please remove or make sure it appears in the correct subdirectory of the classpath.
     Session session = Session.getInstance(props, null);
help?

Answer 1

This is the code we're using (it's an example code we're trying to get to run so we can see what's going on)
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class msgsendsample
     public static void main(String[] args)
     String to = "[email protected]";
     String from = "[email protected]";
     String host = "mail.ejip.net";
     // create some properties and get the default Session
     Properties props = new Properties();
     props.put("mail.smtp.host", host);
     //sending uses a Session Object so, lets create one
     Session session = Session.getDefaultInstance(props, null);
     try {
          // create a message
          Message msg = new MimeMessage(session);
          msg.setFrom(new InternetAddress(from));
          InternetAddress[] address = {new InternetAddress(to)};
          msg.setRecipients(Message.RecipientType.TO, address);
          msg.setSubject("PittJUG Welcome");
          msg.setSentDate(new Date());
          msg.setText("Hello Carl.\nPittJUG Welcomes you!.");
          Transport.send(msg);
          catch (MessagingException mex)
               System.out.println("\n--Exception handling in msgsendsample.java");
               mex.printStackTrace();
}the error we get is:
com.sun.mail.smtp.SMTPSendFailedException: 550 5.7.1 Mail from 124.125.89.30 ref
used - see http://www.spamhaus.org/SBL/and http://www.spamhaus.org/xbl/
at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1
388)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:959)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:583)
at javax.mail.Transport.send0(Transport.java:169)
at javax.mail.Transport.send(Transport.java:98)
at msgsendsample.main(msgsendsample.java:27)