Regarding error for sending mail

Question

hello ,
i was trying to send mail in linux. i have activated all the services such as smtp,pop3, imap and all needed services. i am also successful to set up domain in linux and able to send mail through mozaria mail box.
but through code i face some problems. my program complies but at time of running it is giving null ptr exception.
my domail is email.simon.com
and also providing my code with this so if anybody has information then plz help and guid us
my code is
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class Assimilator
     public static void main(String[] args)
          try
                    Properties props = new Properties();
                    props.put("mail.host","email.simon.com");
                    Session mailConnection = Session.getInstance(props,null);
                    Message msg = new MimeMessage(mailConnection);
                    Address from = new InternetAddress("[email protected]");
                    Address to = new InternetAddress("[email protected]");
                    msg.setContent("Hello! how are you?..........","text/plain");
                    msg.setFrom(from);
                    msg.setRecipient(Message.RecipientType.TO,to);
                    msg.setSubject("Trial");
                    Transport.send(msg);
                    System.out.println("good");
          catch(Exception e)
               e.printStackTrace();
waiting for replies

Answer 1

Probably here:Session mailConnection = Session.getInstance(props,null);I don't see the point of passing null for the Authenticator here. If you aren't going to authenticate then use the other getInstance method:Session mailConnection = Session.getInstance(props);