JAVA MAIL API

package R4R;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class HTMLMailSend
 public static void main(String [] args)
 {
 // Recipient's email ID needs to be mentioned.
 String to = "r4r@localhost";
 // Sender's email ID needs to be mentioned
 String from = "r4r111@localhost";
 // 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(追記) (追記ここまで)
 message.setSubject("This is the Subject Line!");
 // Send the actual HTML message, as big as you like
 message.setContent("<h1>This is the HTML MAIL SEND PROGRAM</h1>",
 "text/html" );
 // Send message
 Transport.send(message);
 System.out.println("Sent message successfully....");
 }catch (MessagingException mex) {
 mex.printStackTrace();
 }
 }
}