Java Mail Debug Utility Source Code

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Source Code for the Java Mail Debug Utility below.

package com.dsi.test;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class MailDebug {

    public  static void main(String[] args) {

       
         // Create properties, get Session
        Properties props = new Properties();
        // SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!
        String to = args[0];
        String from = args[1];
        // SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!
        String host = args[2];
        String   username="";
        String   password="";   
        int port=25;
        if (null!=args[3])
        {
           username = args[3];
           props.put("mail.smtp.user", username);

        }
        if (null !=args[4])
        {
           password = args[4];
          
           props.put("mail.smtp.password", username);
           props.put("mail.smtp.auth", "true");

        }
       
      

        // If using static Transport.send(),
        // need to specify which host to send it to
        props.put("mail.smtp.host", host);
        // To see what is going on behind the scene
        props.put("mail.debug", "true");
       // Session session = Session.getInstance(props);
        Session session = Session.getDefaultInstance(props, null);
        System.out.println(props.toString());
        try {
            // Instantiates a message
            Message msg = new MimeMessage(session);

            //Set message attributes
            msg.setFrom(new InternetAddress(from));
            InternetAddress[] address = {new InternetAddress(to)};
            msg.setRecipients(Message.RecipientType.TO, address);
            msg.setSubject("Test E-Mail through Java");
            msg.setSentDate(new Date());

            // Set message content
            msg.setText("This is a test of sending a " +
                        "plain text e-mail through Java.\n" +
                        "Here is line 2.");
            Transport transport = session.getTransport("smtp");
            transport.connect(host, username, password);
            if (null!=args[4])
            {
            System.out.println("Sending with Authentication using :"+ username+" and Password"+password);
            //transport.connect(host, port, username, password);
            transport.sendMessage(msg, msg.getAllRecipients());
          //  transport.send(msg);
            }
            else
            {
            //Send the message
            System.out.println("Sending without Authentication");
            transport.sendMessage(msg, msg.getAllRecipients());
           //transport.send(msg);
            }
           
        }
        catch (Exception ex) {
            // Prints all nested (chained) exceptions as well
           // ex.printStackTrace();
            System.out.println(ex.toString());
        }
    }
   
}