using javamail to read email from exchange server

Hi Experts!

I'm trying to write a java program to read emails from our company's exchange server. I've written similar programs before accessing a pop3 account, but I'm having problems accessing my email on the exchange server using the same technique. I understand that the Exchange server doesn't (by default anyway) use pop3, so I've tried using imap, but unsuccessfully. Below is my code (its modeled on one of the javamail tutorials). I've tried using different account name combinations ie. DMAIN_NAME\account_name etc. But nothing seems to work. the error message I keep getting is (I've turned session debugging on):

DEBUG: setDebug: JavaMail version 1.3
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
javax.mail.MessagingException: Connection refused: connect;
  nested exception is:
      java.net.ConnectException: Connection refused: connect
      at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:303)
      at javax.mail.Service.connect(Service.java:233)
      at javax.mail.Service.connect(Service.java:134)
      at au.com.covermore.EmailReader.receive(EmailReader.java:89)
      at au.com.covermore.EmailReader.main(EmailReader.java:55)

The code:

/**
 * @author leiberov
 * this program is intended to retrieve and parse emails sent by the ashop
 * application, the information extracted from the emails is to be stored
 * in an xml or text file to be analised and reported from later
 */

package au.com.covermore;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;

public class EmailReader {

      /* variables */
      
      /**
       * @param args
       * popServer - the url of the POP3 server eg. pop.iprimus.com.au
       * popUser - POP server user name
       * popPassword - password associated with the above username
       */
      public static void main(String[] args)
      {
            // TODO Auto-generated method stub
            try
          {
                String popServer=args[0];
                String popUser=args[1];
                String popPassword=args[2];
               
                System.out.println("java EmailReader "
                            + popServer + " " + popUser + " " + popPassword);
               
                receive(popServer, popUser, popPassword);
          }
          catch (Exception ex)
          {
                System.out.println("Usage: EmailReader"
                            +" popServer popUser popPassword");
          }

          System.exit(0);

      }
      
      /**
       * this method will retrieve and read the emails from the INBOX
       * @param popServer
       * @param popUser
       * @param popPassword
       */
      public static void receive(String popServer, String popUser, String popPassword)
      {

            Store store=null;
            Folder folder=null;

          try
          {
                // -- Get hold of the default session --
                Properties props = System.getProperties();
                Session session = Session.getDefaultInstance(props, null);
                session.setDebug(true);
      
                // -- Get hold of a POP3 message store, and connect to it --
                //store = session.getStore("pop3");
                store = session.getStore("imap");
                store.connect(popServer, popUser, popPassword);
        
                // -- Try to get hold of the default folder --
                folder = store.getDefaultFolder();
                if (folder == null) throw new Exception("No default folder");
      
                // -- ...and its INBOX --
                folder = folder.getFolder("INBOX");
                if (folder == null) throw new Exception("No POP3 INBOX");
      
                // -- Open the folder for read only --
                folder.open(Folder.READ_ONLY);
      
                // -- Get the message wrappers and process them --
                Message[] msgs = folder.getMessages();
                
                System.out.println("ava au.com.covermore.EmailReader"
                            +" msgs " + msgs.length);
                
                for (int msgNum = 0; msgNum < msgs.length; msgNum++)
                {
                      printMessage(msgs[msgNum]);
                      //processMessage(msgs[msgNum]);
                }
      
          }
          catch (Exception ex)
          {
                ex.printStackTrace();
          }
          finally
          {
                // -- Close down nicely --
                try
                {
                      if (folder!=null) folder.close(false);
                      if (store!=null) store.close();
                }
                catch (Exception ex2) {ex2.printStackTrace();}
          }
      }
      
      /**
       * this method will print the message
       * @param message
       */
      public static void printMessage(Message message)
      {
            try
            {
                  // Get the header information
                  String from=((InternetAddress)message.getFrom()[0]).getPersonal();
                  if (from==null) from=((InternetAddress)message.getFrom()[0]).getAddress();
                  System.out.println("FROM: "+from);
                  
                  String subject=message.getSubject();
                  System.out.println("SUBJECT: "+subject);
                  
                  //String dateTime = message.getSentDate().toString();
                  System.out.println("DATE: "+ message.getSentDate());
                  
                  // -- Get the message part (i.e. the message itself) --
                  Part messagePart=message;
                  Object content=messagePart.getContent();
                  
                  // -- or its first body part if it is a multipart message --
                  if (content instanceof Multipart)
                  {
                        messagePart=((Multipart)content).getBodyPart(0);
                      System.out.println("[ Multipart Message ]");
                  }

                  // -- Get the content type --
                  String contentType=messagePart.getContentType();

                  // -- If the content is plain text, we can print it --
                  System.out.println("CONTENT:"+contentType);

                  if (contentType.startsWith("text/plain") || contentType.startsWith("text/html"))
                  {
                        InputStream is = messagePart.getInputStream();

                        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                        String thisLine=reader.readLine();
                        
                        while (thisLine!=null)
                        {
                              System.out.println(thisLine);
                              thisLine=reader.readLine();
                        }
                  }

                  System.out.println("-----------------------------");
            }
            catch (Exception ex)
            {
                  ex.printStackTrace();
            }
      }
      
      /**
       * this method will process an email message and write
       * relevant contents into the xml file
       * @param message
       */
      private static void processMessage(Message message)
      {
            try
            {
                  // -- Get the message part (i.e. the message itself) --
                  Part messagePart=message;
                  Object content=messagePart.getContent();
            
                  // -- or its first body part if it is a multipart message --
                  if (content instanceof Multipart)
                  {
                        messagePart=((Multipart)content).getBodyPart(0);
                  }
                  
                  // -- Get the content type --
                  String contentType=messagePart.getContentType();
                  
                  if (contentType.startsWith("text/plain") || contentType.startsWith("text/html"))
                  {
                        InputStream is = messagePart.getInputStream();

                        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                                                
                        
                        // now read the message into a List - each message line is a list item
                        // a List will be easier to manipulate and its indexed
                        // remove blank lines at the same time
                        List msgList = new LinkedList();
                        
                        String thisLine=reader.readLine();
                        while (thisLine!=null)
                        {
                              if(thisLine.trim().length()>0)
                                    msgList.add(thisLine);
                              thisLine=reader.readLine();
                        }
                        
                  }
            }
            catch(Exception x)
            {
                  x.printStackTrace();
            }
            
      }
      
}