Hi,

To send email you need a local mail server such as apache james. You first download apache james mail server and install on the local network.

Then create users for to send and received email.

Then your clients will send and receive emails using outlook client.

From java program you can also send email.

Here is an example code to send emails:

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class Mail extends Thread{
public java.lang.String from = "";
public java.lang.String[] to ;
public java.lang.String message = "";
Session mailSession;
public java.lang.String subject = "";
public java.lang.Exception error;
public Mail() {
super();
Properties props = new Properties();
props.put("mail.smtp.host", "your.mail.server.name");
mailSession = Session.getDefaultInstance(props, null);
}
public java.lang.Exception getError() {
return error;
}
public java.lang.String getFrom() {
return from;
}
public java.lang.String getMessage() {
return message;
}
InternetAddress[] getRecipients(){
InternetAddress[] recipient= new InternetAddress[to.length];
for ( int i=0 ; <recipient.length ; i++ ) {
try {
recipient[i]= new InternetAddress(to[i]);
} catch ( Exception e ) {}
}
return recipient;
}
public java.lang.String getSubject() {
return subject;
}
public java.lang.String[] getTo() {
return to;
}
public static void main(String[] args) {

Mail mail=new Mail();
mail.from="from.user@host";
String[] s={"to.user@host"};
mail.to=s;

mail.message="Test";
mail.send();

}
public void run(){
try {
Message msg = new MimeMessage(mailSession);
InternetAddress fromAddress = new InternetAddress(from);
msg.setFrom(fromAddress);
InternetAddress[] address = getRecipients();
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject(subject);
msg.setContent(message, "text/plain");
Transport.send(msg);
} catch ( Exception e ) { error=e; }
}
public boolean send() {
run();
if ( error!=null ) {
Utility.debug("SendMessage : from:"+from+",to:"+to+"\n"+error);
return false;
}
return true;

}
public void setError(java.lang.Exception newError) {
error = newError;
}
public void setFrom(java.lang.String newFrom) {
from = newFrom;
}
public void setMessage(java.lang.String newMessage) {
message = newMessage;
}
public void setSubject(java.lang.String newSubject) {
subject = newSubject;
}
public void setTo(java.lang.String[] newTo) {
to = newTo;
}
}

Thanks

Java Code for sending messages(text or multimedia) from 1 pc to another in LAN.

Example Code

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.URLName;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import com.sun.mail.smtp.SMTPTransport;
import java.io.*;
import java.util.*;
public class MailSender
{

private Transport transport;
private Message message;
private Session session;
public static void main(String[] args) throws Exception{
MailSender mailSender = new MailSender();
String from = "mail_mevinod@yahoo.com ";
String to[] = new String[]{"vinod@localhost"};
String subject = "news";
String content = "Hi, how are you?";
mailSender.setMessage(from,to,subject,content);
mailSender.setSMTPServer("localhost",25,null,null);
mailSender.send();
}
public void setMessage(String fromAddress,String toAddress,String subject,String content)
throws Exception
{
String[] addresses = {toAddress};
setMessage(fromAddress,addresses,subject,content);
}
public void setMessage(String fromAddress,String[] toAddresses,String subject,String content)
throws Exception
{
session = Session.getInstance(System.getProperties());
message = new MimeMessage(session);
message.setFrom(new InternetAddress(fromAddress));
InternetAddress[] toIntAdds = new InternetAddress[toAddresses.length];
for (int i=0;i<toAddresses.length;i++)
toIntAdds[i] = new InternetAddress(toAddresses[i]);
message.setRecipients(Message.RecipientType.TO,toIntAdds);
message.setSubject(subject);
message.setSentDate(new java.util.Date());
message.setText(content);
File f = new File("Message.properties");
Properties pro = new Properties();
FileInputStream in = new FileInputStream(f);
pro.load(in);
//String companyName="Cinbell";
//String messageIdKey=pro.getProperty(companyName);
//System.out.println("messageIdKey:"+messageIdKey);
message.setHeader(messageIdKey,"1000");
/* File f = new File("Message.properties");
Properties pro = new Properties();
FileInputStream in = new FileInputStream(f);
pro.load(in);
Enumeration em = pro.keys();
while(em.hasMoreElements()){
String key = (String)em.nextElement();
String val = pro.getProperty(key);
message.setHeader(val,"1000"); } */
}
public void setSMTPServer(String host,int port,String user,String password) throws Exception{
transport = new SMTPTransport(session,new URLName(host));
transport.connect(host,port,null,null); }
public void send() throws Exception{
message.saveChanges();
transport.sendMessage(message, message.getAllRecipients());
System.out.println("Message is sent.");
transport.close(); } }