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

public class AttachExample {
  public static void main (String args[]) throws Exception {
    String host = args[0];
    String from = args[1];
    String to = args[2];
    String filename = args[3];

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

    // Setup mail server
    props.put("mail.smtp.host", host);

    // Get session
    Session session = Session.getInstance(props, null);

    // Define message
    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress(from));
    message.addRecipient(Message.RecipientType.TO, 
      new InternetAddress(to));
    message.setSubject("Hello JavaMail Attachment");

    // Create the message part 
    BodyPart messageBodyPart = new MimeBodyPart();

    // Fill the message
    messageBodyPart.setText("Here's the file");

    // Create a Multipart
    Multipart multipart = new MimeMultipart();

    // Add part one
    multipart.addBodyPart(messageBodyPart);

    //
    // Part two is attachment
    //

    // Create second body part
    messageBodyPart = new MimeBodyPart();

    // Get the attachment
    DataSource source = new FileDataSource(filename);

    // Set the data handler to the attachment
    messageBodyPart.setDataHandler(new DataHandler(source));

    // Set the filename
    messageBodyPart.setFileName(filename);

    // Add part two
    multipart.addBodyPart(messageBodyPart);

    // Put parts in message
    message.setContent(multipart);

    // Send the message
    Transport.send(message);
  }
}