IO Exception :Connection timed out

hai,
I have a mail servlet and when i try to run that servlet i get this error:,kindly tell me how to correct the error.
thanx
prabhakar
code:

import javax.servlet.*;
import javax.servlet.http.*;
import java.net.*;
import java.io.*;
import java.util.*;
import javax.mail.*;
import javax.activation.*;
import java.applet.*;
import javax.swing.text.*;
public class SendMail extends HttpServlet {
public void init(ServletConfig config) throws ServletException {
super.init(config);
}

public void doPost(HttpServletRequest request, HttpServletResponse response ) throws ServletException,IOException {
response.setContentType("text/html");
PrintWriter out=response.getWriter();
String to = request.getParameter("toaddress");
String from = request.getParameter("fromaddress");
String caption = request.getParameter("heading");
String message = request.getParameter("message");

try {
sendMail(to,from,caption,message) ;
 }
 catch(UnknownHostException uhe)
 { /* Traitement de UnknownHostException */
out.println("<html><head><title>Prabhakar Mail UnknownHost Exception</title></head><body>");
out.println(" UnknownHost Exception");
out.println("Exception:\t"+uhe);
out.println("</body>");
out.println("</html>");
//out.close();
 }
 catch(ProtocolException pe)
 { /* Traitement du ProtocolException */ 
out.println("<html><head><title>Prabhakar Mail Protocol Exception</title></head><body>");
out.println(" Protocol Exception");
out.println("Exception:\t"+pe);
out.println("</body>");
out.println("</html>");
//out.close();
}
 catch(IOException ioe)
 { /* Traitement de IOException */ 
out.println("<html><head><title>Prabhakar Mail IO Exception</title></head><body>");
out.println(" IO Exception");
out.println("Exception:\t"+ioe);
out.println("</body>");
out.println("</html>");
out.close();
}
 
 out.close();

} // End of doGet

public void sendMail(String to_address, // Destinataire du message
 String from_address, // Emeteur du message
 String sSu, // Sujet du message
 String sMess) // Message
 throws IOException, ProtocolException, UnknownHostException
 {
 Socket socket; // Le Socket
 DataInputStream in; // Le stream de lecture du Socket
 PrintStream out; // Le stream d'ecriture du Socket
 String host; // Identification du poste
 String str; // Pour la lecture de donnees
 // Identification du poste
 // host peut etre force a <a href="http://www.ibm.com" target="_blank" rel="nofollow">www.ibm.com</a> ou autre en cas de probleme
 host = InetAddress.getLocalHost().toString() ;
 // Ouverture du socket (connection au mailServer)
 // et des streams de lecture et d'ecriture

//   socket = new Socket(getDocumentBase().getHost(), 25);
    // socket = new Socket(url.getHost(), 25);
socket = new Socket("mail.yahoo.com",25);
     in     = new DataInputStream(socket.getInputStream());
     out    = new PrintStream(socket.getOutputStream());
 
     // lecture du message initial
     str = in.readLine();
     if (!str.startsWith("220"))    throw new ProtocolException(str);
     while (str.indexOf('-') == 3) {
         str = in.readLine();
         if (!str.startsWith("220"))  throw new ProtocolException(str);
     }
     // fin message initial
     // Dialogue avec les Serveur de mail
     // Envoie de HELO au serveur SMTP
     out.println( "HELO " + host );
     out.flush() ;
     str = in.readLine();
     if (!str.startsWith("250"))    throw new ProtocolException(str);
     // On est connecte au serveur de Mail...
     // Envoie du Mail
     out.println( "MAIL FROM: " + from_address );
     out.flush() ;
     str = in.readLine();
     if (!str.startsWith("250"))    throw new ProtocolException(str);
     // A qui envoie t on cela 
     out.println( "RCPT TO: " + to_address );
     out.flush() ;
     str = in.readLine();
     if (!str.startsWith("250"))    throw new ProtocolException(str);
     // Est on pret a envoyer les donnees
     out.println( "DATA" );
     out.flush() ;
     str = in.readLine();
     if (!str.startsWith("354"))    throw new ProtocolException(str);
     // Emmeteur - Destinataire - Sujet
     out.println("From: " + from_address);
     out.println("To: " + to_address);
     out.println( "Subject: " + sSu + "\n" );
     out.flush() ;
     out.println("Comment: Unauthenticated sender");
     out.println("X-Mailer: Simple tSmtp");
     out.println("");
     out.println( sMess ) ;
     out.println(".") ;
     out.flush() ;
     str = in.readLine();
     if (!str.startsWith("250"))    throw new ProtocolException(str);
     out.println("QUIT");
     out.flush();
     in.close() ;
     socket.close()  ;
     return ;
   }

} // end of class

Added code UBB tags
-Mike C
[ January 07, 2002: Message edited by: Mike Curwen ]

Hi varkala,

Could you provide a bit more detail in your stack trace? It's helpful to see the full stack trace when diagnosing a problem.

There are a few things I will comment on:

You seem to be accessing mail.yahoo.com on port 25. Does Yahoo provide smtp service on this port?

Is there a reason you're not using JavaMail API to send/receive emails? It hides some of the Sockets and Streams details, and is a bit easier to use.