JavaMail Problem Help Please

[Bibhishan Karadkar]

I am trying to send mail from work we are behind firewall ,my machin it is Exception error
javax.mail.SendFailedException: Sending failed; nested exception is: javax.mail.MessagingException: Unknown SMTP host: mail.ip.eth.net; nested exception is: java.net.UnknownHostException: dns.alkazemi.com.kw

except this I used other hosts also but it is giving same error with host name ,
But another thing is that same application is working fine from another machine in my office It is not giving exceptions ,
we are behind firewall ,I think due to this problem is occuring any Idea Please help
Thanks ,
Bibhishan

[Jared Krull]

If you are behind a firewall there is a good reason. Part of the reason for them is to block un-recognised programs contacting the net.
If you have this problem you should discuss it with your System Administrator and see if he/she will allow you access.
Firewalls arent easy to bypass - thats the whole point I'm afraid.

[Bibhishan Karadkar]

Thanks for reply
but I didnt' get what is problem actualt ,beca on another machine in my domain this application is working fine means sending mails but problem with my machine
please let me know what will be the reasons behind this
I am Using JavaMail1.2 & jaf-1.0.1
I am sending my code to U
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.mail.*;
import javax.mail.event.*;
import javax.mail.internet.*;
import javax.activation.*;
//import javax.mail.smtp;
public class MailClient extends HttpServlet
{
final String mailHost="202.9.128.101";
//final String mailHost="mail.ip.eth.net";
String source,dest,sub,content,fileName,fileStr="",str;
File file;
FileDataSource fileSource;
PrintWriter out;
public void init(ServletConfig config)throws ServletException
{
super.init(config);
}
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
try {
res.setContentType("text/html");
out = res.getWriter();
dest=req.getParameter("to");
source=req.getParameter("from");
sub=req.getParameter("sub");
content=req.getParameter("content");
fileName=req.getParameter("fileNm");
file = new File(fileName);
Properties prop = System.getProperties();
prop.put("mail.smtp.host",mailHost);
Session session = Session.getDefaultInstance(prop, null);
//Session session = Session.getInstance(prop, null);
InternetAddress[] address= InternetAddress.parse(dest);

MimeMessage msg = new MimeMessage(session);
msg.addHeader("X-Priority", "1");
msg.setRecipients(Message.RecipientType.TO,address);
msg.setFrom(new InternetAddress(source));
msg.setSubject(sub);
if(file.exists())
{
MimeBodyPart body = new MimeBodyPart();
body.setText(content);
MimeBodyPart attachment = new MimeBodyPart();
fileSource = new FileDataSource(file);
attachment.setDataHandler(new DataHandler(fileSource));
attachment.setFileName(fileSource.getName());
Multipart part = new MimeMultipart();
part.addBodyPart(body);
part.addBodyPart(attachment);
msg.setContent(part);
}
else
{
msg.setText(content);
}
Transport.send(msg);
out.println("Mail send successfully");
}
catch(Exception e)
{
out.println(e.toString());
}
}
}
Exception is
453dce javax.mail.SendFailedException: Sending failed; nested exception is: javax.mail.MessagingException: Could not connect to SMTP host: 202.9.128.101, port: 25; nested exception is: java.net.NoRouteToHostException: Host unreachable: no further information
Please Help me out
Please correct me If I am wrong
Tahnks