Whats SMTP/POP3 host server address in JavaMail

Question

Hello friends,
I came to know that we could send mail through Java through JavaMail
I downloaded some eg code ( for sending mail to some one )
I downloaded the mail.jar and activation.jar (and put it in right palce where it was asked to)
I am using java 1.6 SE
what i could not understand is what is
POP3 server
SMTP server
How / What to put server address in the code
Please help me. Here is the below code
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.io.*;
import java.util.Properties;
public class MailClient
     public void sendMail(String mailServer, String from, String to,
                             String subject, String messageBody,
                             String[] attachments) throws
MessagingException, AddressException
          // Setup mail server
         Properties props = System.getProperties();
         props.put("mail.smtp.host", mailServer);
         // Get a mail session
         Session session = Session.getDefaultInstance(props, null);
         // Define a new mail message
         Message message = new MimeMessage(session);
        /// System.out.println(" 1");
         message.setFrom(new InternetAddress(from));
         message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
         message.setSubject(subject);
         // Create a message part to represent the body text
         BodyPart messageBodyPart = new MimeBodyPart();
         messageBodyPart.setText(messageBody);
         //use a MimeMultipart as we need to handle the file attachments
         Multipart multipart = new MimeMultipart();
         //add the message body to the mime message
         multipart.addBodyPart(messageBodyPart);
         // add any file attachments to the message
         addAtachments(attachments, multipart);
         // Put all message parts in the message
         message.setContent(multipart);
         // Send the message
         Transport.send(message);
     protected void addAtachments(String[] attachments, Multipart multipart)
                     throws MessagingException, AddressException
         for(int i = 0; i<= attachments.length -1; i++)
             String filename = attachments;
MimeBodyPart attachmentBodyPart = new MimeBodyPart();
//use a JAF FileDataSource as it does MIME type detection
DataSource source = new FileDataSource(filename);
attachmentBodyPart.setDataHandler(new DataHandler(source));
//assume that the filename you want to send is the same as the
//actual file name - could alter this to remove the file path
attachmentBodyPart.setFileName(filename);
//add the attachment
multipart.addBodyPart(attachmentBodyPart);
public static void main(String[] args)
try
     MailClient client = new MailClient();
String server="pop3.mydomain.com";
String from="[email protected]";
String to = "[email protected]";
String subject="Test";
String message="Testing";
String[] filenames =
{"c:\\somefile.txt"};
client.sendMail(server,from,to,subject,message,filenames);
System.out.println(" Mail Has been sent");
catch(Exception e)
e.printStackTrace(System.out);
} and the error i get after running this is
javax.mail.MessagingException: Could not connect to SMTP host: pop3.mydomain.com, port: 25;
  nested exception is:
     java.net.ConnectException: Connection timed out: connect
     at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1391)
     at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
     at javax.mail.Service.connect(Service.java:288)
     at javax.mail.Service.connect(Service.java:169)
     at javax.mail.Service.connect(Service.java:118)
     at javax.mail.Transport.send0(Transport.java:188)
     at javax.mail.Transport.send(Transport.java:118)
     at MailClient.sendMail(MailClient.java:39)
     at MailClient.main(MailClient.java:76)
Caused by: java.net.ConnectException: Connection timed out: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.SocksSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:233)
     at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
     at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1359)
     ... 8 more
Thanks                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

I followed ur Advice
I got another code which works perfecty as i wanted
this uses Gmail SMTP
Thanks
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
public class Main
    String  d_email = "[email protected]",
            d_password = "password",
            d_host = "smtp.gmail.com",
            d_port  = "465",
            m_to = "[email protected]",
            m_subject = "Testing",
            m_text = "Hey, this is the testing email.";
    public Main()
        Properties props = new Properties();
        props.put("mail.smtp.user", d_email);
        props.put("mail.smtp.host", d_host);
        props.put("mail.smtp.port", d_port);
        props.put("mail.smtp.starttls.enable","true");
        props.put("mail.smtp.auth", "true");
        //props.put("mail.smtp.debug", "true");
        props.put("mail.smtp.socketFactory.port", d_port);
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");
        SecurityManager security = System.getSecurityManager();
        try
            Authenticator auth = new SMTPAuthenticator();
            Session session = Session.getInstance(props, auth);
            //session.setDebug(true);
            MimeMessage msg = new MimeMessage(session);
            msg.setText(m_text);
            msg.setSubject(m_subject);
            msg.setFrom(new InternetAddress(d_email));
            msg.addRecipient(Message.RecipientType.TO, new InternetAddress(m_to));
            Transport.send(msg);
        catch (Exception mex)
            mex.printStackTrace();
    public static void main(String[] args)
        Main blah = new Main();
    private class SMTPAuthenticator extends javax.mail.Authenticator
        public PasswordAuthentication getPasswordAuthentication()
            return new PasswordAuthentication(d_email, d_password);
}