Need Authentication for SMTP Access

Question

I have this Java program (SendMail.java) for sending email; however, my ISP requires authentication for SMTP server access, i.e. I receive a 550 Authentication Required error. Does anyone know how to go about coding authentication into a program like SendMail so that the userID and password can be sent back to the server?
* SendMail.java
* Created on July 13, 2005, 8:09 PM
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* @author Owner
// SendMail by Tony Swain.
// Send mail via SMTP
// To do Appletisize it.
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.util.StringTokenizer;
import java.net.Authenticator;
import java.net.*;
// To do. Finish multiThreading &| write que Thread.
// this programs sends mail Via SMTP as defined in RFC 821.
// ftp://ftp.isi.edu/in-notes/rfc821.txt
public class SendMail   
Object mailLock              = null;  //In case we want a multi-threaded mailer
public String mailServerHost = "";
public String from           = "";
public String to             = "";
public String replyTo        = "";
public String subject        = "Java is Fun";
public String mailData       =
   "HyperSendMail";
public String errorMsg = "";
public Socket mailSendSock = null;
public  BufferedReader inputStream = null;
public PrintStream outputStream    =  null;
public String serverReply          = "";
SendMail()
   // Doesn't do anything but we need this for extension purposes.
// Server, from,to,subject, data
SendMail(String server,String tFrom,String tTo,String sub,String sendData)
   mailServerHost = server;
   mailLock=this; // Thread Monitor passed constructor later. Default this Monitor.
   from = tFrom;
   to   = tTo;
   if(sendData != null)
      mailData = sendData; 
/*  Just a note to remind myself to add this for cross app./Applet & Runnable.
   & Threadsafe readLine()  I'm too lazy ATM
SendMail()
   if(mailLock != null)
      if(mailLock instanceof Applet)
         Applet app = (Applet)
public void send()
   if(!open())          //Yikes! get out of here.
      return;    
   try
      outputStream.println("HELO sendMail");
      serverReply = inputStream.readLine(); 
   catch(Exception e0)
      e0.printStackTrace();
   try
      outputStream.println("MAIL FROM: "+from);
      serverReply = inputStream.readLine();
        // I cheat and don't look for the whole 550
        // we know 5 is an error anyway. Add it in if you want.
      if(serverReply.startsWith("5"))
         close("FROM: Server error :"+serverReply);
         return;
   // Note the switch here. we could get mail from somewhere and by
   // pre setting replyTo reply somewhere else :)
      if(replyTo == null)
         replyTo = from;
      outputStream.println("RCPT TO: <"+to+">");
       // Ya got me! I didn't look for any  250 OK messages. Add it in if you really want.
       // A real programmer will spend 30 hours writing self modifying code in order
       // to save 90 nano seconds ;)  we assume if it did't give an error it must be OK.
      serverReply = inputStream.readLine();
      if(serverReply.startsWith("5"))
         close("Reply error:"+serverReply);
         return;
      outputStream.println("DATA");
      serverReply = inputStream.readLine();
      if(serverReply.startsWith("5"))
         close("DATA Server error : "+serverReply);
         return;
      outputStream.println("From: "+from);
      outputStream.println("To: "+to);
      if(subject != null)
         outputStream.println("Subject: "+subject);
      if(replyTo != null)
         outputStream.println("Reply-to: "+replyTo);
      outputStream.println("");
      outputStream.println(mailData);
      outputStream.print("\r\n.\r\n");
      outputStream.flush();
      serverReply = inputStream.readLine();
      if(serverReply.startsWith("5"))
         close("DATA finish server error: "+serverReply);
         return;
      outputStream.println("quit");
      serverReply = inputStream.readLine();
      if(serverReply.startsWith("5"))
         close("Server error on QUIT: "+serverReply);
         return;
      inputStream.close();
      outputStream.close();
      mailSendSock.close();
   catch(Exception any)
      any.printStackTrace();
      close("send() Exception");
   close("Mail sent");
public boolean open()
   synchronized(mailLock)
      try
         mailSendSock = new Socket(mailServerHost, 25);
         outputStream = new PrintStream(mailSendSock.getOutputStream());
         inputStream = new BufferedReader(new InputStreamReader(
          mailSendSock.getInputStream()));
         serverReply = inputStream.readLine();
         if(serverReply.startsWith("4"))
            errorMsg = "Server refused the connect message : "+serverReply;
            return false;
      catch(Exception openError) 
         openError.printStackTrace();
         close("Mail Socket Error");
         return false;
      System.out.println("Connected to "+mailServerHost);
      return true;
public void close(String msg)
          //try to close the sockets
   System.out.println("Close("+msg+")");
   try
      outputStream.println("quit");
      inputStream.close();
      outputStream.close();
      mailSendSock.close();
   catch(Exception e)
      System.out.println("Close() Exception");
     // We are closing so see ya later anyway
public static void main(String Args[])
SendMail sm = new
// * NOTE:
// Erase these values right away! Just to show you how it is done.
// Whatever you do don' release it with my mail server hardcoded.
// last thing I need is 10 million Java mail test spams :)
SendMail(
          "outgoing.myISP.net",         //Mail Server
          "[email protected]",       // sender
          "[email protected]",       // Recipient
          "Java mail test",               // Subject
          "test test test!");             // Message Data
          sm.send();                      // Send it!
}

Answer 1

There is no one in the forum who can shed some light on my problem?