🚀 go-pugleaf

hi,

i am working on mailserver project. i want to send mail to any account.
my programs compiles successfully but gives the null pointer expection
when i try to execute the program. i am using javamail api for coding
purpose and linux as os. we are succesfully established the domain
mail.simon.com but are unable to execute as null ptr exception is
thrown. so if anybody has an idea then plz help us. i am also providing
my code with this,

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("kapil@email.simon.com");
				Address to = new InternetAddress("simon@email.simon.com");

				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();
		}
	}
}

thanks.