how to send email using Java Program?

Hi,

I am new to this Forum and to Java as well.. Let me know how to go about learning java. I am looking to make programs and gradually learn by executing practical examples.
I am also reading SCJP book for reference.

I want to make a java program which sends email. I've got the following code

// File Name SendEmail.java

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class SendEmail
{
   public static void main(String [] args)
   {
      
      // Recipient's email ID needs to be mentioned.
      String to = "*****@gmail.com";

// Sender's email ID needs to be mentioned
      String from = "******";

// Assuming you are sending email from localhost
      String host = "localhost";

// Get system properties
      Properties properties = System.getProperties();

// Setup mail server
      properties.setProperty("mail.smtp.host", host);

// Get the default Session object.
      Session session = Session.getDefaultInstance(properties);

try{
         // Create a default MimeMessage object.
         MimeMessage message = new MimeMessage(session);

// Set From: header field of the header.
         message.setFrom(new InternetAddress(from));

// Set To: header field of the header.
         message.addRecipient(Message.RecipientType.TO,
                                  new InternetAddress(to));

// Set Subject: header field
         message.setSubject("This is the Subject Line!");

// Now set the actual message
         message.setText("This is actual message");

// Send message
         Transport.send(message);
         System.out.println("Sent message successfully....");
      }catch (MessagingException mex) {
         mex.printStackTrace();
      }
   }
}

I have a XAMPP host working. and I have attached the Jars for the JAF and the JavaMail. What else do I need to configure. I am unsure how to go about setting the SMTP. Though I have enabled it on my windows 7 laptop. But still getting the error.
Cannot open and load mail server properties file.
Cannot send email. javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused: connect

Thanks in advance.
Continues effort by me and little help from the experts will help me grow..

It seems that you're not running a mail server on "localhost" on port 25. You can't send mail without a mail server.

Tim Moores wrote:It seems that you're not running a mail server on "localhost" on port 25. You can't send mail without a mail server.

Hi, Thanks for the quick reply.

How do I run a mail server on localhost. From the control panel I have enabled the IIS and Telnet Client and Server.

Neither IIS nor Telnet have anything to do with mail. You need something like Apache James.

If you want to test, use a web mail account, such as GMail.

Tim Moores wrote:Neither IIS nor Telnet have anything to do with mail.

Not completely true. IIS is not just the web server, it also includes an FTP and SMTP server. However, they aren't started automatically. You would need to configure and start the SMTP server part of IIS. Or go for Apache James of course.

Tim Moores wrote:Neither IIS nor Telnet have anything to do with mail. You need something like Apache James.

Hi I am using apache Xampp. This includes Mercury mail server.
Still I am getting this error. How do i Check whether the mail server is working or not.
I did
telnet google.com 25
which says that its unable to connect..

Rob Spoor wrote:

Tim Moores wrote:Neither IIS nor Telnet have anything to do with mail.

Not completely true. IIS is not just the web server, it also includes an FTP and SMTP server. However, they aren't started automatically. You would need to configure and start the SMTP server part of IIS. Or go for Apache James of course.

Hi,

I have started the SMTP server from the control panel already. But I am still getting the same error..

Anubhav Aeron wrote:How do i Check whether the mail server is working or not.
I did
telnet google.com 25
which says that its unable to connect..

Try telnet localhost 25. That will try to connect on port 25 on your own machine instead of whichever machines is behind google.com.

Hi Aeron, you can test your javamail code using Mock-javamail without an actual working mail server.