Hai

 Just Try this code

import java.text.*;
import java.util.*;
import javax.mail.*;
import javax.activation.*;
import javax.mail.internet.*;
public class webpop31
{
 public static void main(String ag[])


  String status = "";
  String pop3Host="mail.espacetech.com;
  String user="nandha@e...";
  String pass="123nandha";
  System.out.println(user);
  String from="nansang@y...";
  System.out.println(pass);
  try
  {
   Properties props = new Properties();
   props.put("mail.pop3.host", "mail.espacetech.com");
   System.out.println("after props");
   Session msession = Session.getDefaultInstance(props, null);
   Store store =msession.getStore("pop3");
   System.out.println("after Store");
   store.connect("mail.espacetech.com",user,pass);
   System.out.println("after connect");
   Folder folder=store.getFolder("INBOX");
   folder.open(Folder.READ_ONLY);
   System.out.println("Inbox opened");
   Message[] msg=folder.getMessages();
   System.out.println("after getting message");
   for(int i=0; i< msg.length;i++)
   {
   System.out.println("From : "+msg[i].getFrom(from)+"\n"+"Subject :
"+msg[i].getSubject()+"\n");
   }

   folder.close(false);
   store.close();
  }
  catch (Exception e)
  {
   e.printStackTrace();
   status = "Error Sending Message";
  }
 }
}