Java mail - unknown host

Question

hi
I am quite new to java.. I have written some code that requests user input to create a mail then should be sent.
I am using my companies smtp address to send it through but i keep getting the exception unknown host, however when a colleague tries to run my code on there pc on the same network it works correctly. Really impressed my code works but i want to play with it and add things to it and cannot!
Is there any settings or rights i should have on my pc to enable me to get this code to work. Also does anyone know of any external smtp hosts i can send mails from.
I can ping the smtp from dos and that works but will not recognise in code
thanks
A

Answer 1

import javax.mail.Address;
import javax.mail.Session;
import javax.mail.Authenticator;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.AddressException;
import javax.mail.internet.MimeMessage;
import java.io.*;
import java.util.Properties;
* Created by IntelliJ IDEA.
* User: ai011767
* Date: Apr 8, 2003
* Time: 3:24:57 PM
* To change this template use Options | File Templates.
public class JavaMail {
Address recipientEmail;
String ccAddress;
Address senderAddress;
String subject;
String message;
Properties p;
String host;
//*Address replyTo;
public JavaMail(String propertiesPath) {
try {
FileInputStream fis = new FileInputStream(propertiesPath);
p = new Properties();
p.load(fis);
host = p.getProperty("host");
System.err.println(host);
catch (Exception e) {
System.out.println("file not found");
public void mail(Address recipientAddress, Address senderAddress, Address reply[], String subject, String message) {
p.put("mail.smtp.host", host);
try {
Session s = Session.getInstance(p, null);
MimeMessage mess = new MimeMessage(s);
mess.setText(message);
mess.setSubject(subject);
Address a = new InternetAddress();
mess.addRecipient(MimeMessage.RecipientType.TO,recipientAddress);
mess.setFrom(senderAddress);
mess.setReplyTo(reply);
Transport.send(mess);
catch (Exception e) {
e.printStackTrace(); //To change body of catch statement use Options | File Templates.
public void doWork() {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
try {
System.out.println("Type in recipents e-mail Address");
String strRecipientEmail = in.readLine();
Address recipientAddress = new InternetAddress(strRecipientEmail);
System.out.println("Type in reply address");
String strreplyTo =in.readLine();
Address replyTo = new InternetAddress(strreplyTo);
Address[] reply = new Address[1];
reply[0] = replyTo;
System.out.println("Type in Senders E-mail Address");
String strSenderAddress = in.readLine();
Address senderAddress = new InternetAddress(strSenderAddress);
System.out.println("Type in Subject");
subject = in.readLine();
System.out.println("Type in Message");
message = in.readLine();
this.mail(recipientAddress, senderAddress, reply, subject, message);
catch (Exception e) {
System.out.println("No Line to read");
public static void main(String args[]) {
JavaMail jm = new JavaMail(args[0]);
jm.doWork();