How can I generate auto Emails upon successful registration using jsp?

Question

Dear all, I have been researching on how to send auto-emails using JSP for several days but I still do not understand how to do it and how it works! I tried reading JavaMail but i do not understand it can anyone help me?
Thank You very Much,

Answer 1

The mail.jar & activation.jar are part of Tomcat 4.x and up
Here is my simple example, you may want to make bean methods to get/properties so that you create an email like an object :-o
Notice, I make the message body a StringBuffer, so you can append info as you see fit.
Also assuming your SMTP server is the local machine, set that property to "localhost".
I also use a boolean return so I know if the message sent otherwise display a message to the user (aka, please email support to confirm your registration, etc.)
import java.util.Date;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
import java.net.InetAddress;
    private String to = "[email protected]";
    static private String from = "registered@localhost";
    private String subject = "Registered";
    private StringBuffer messageText = null;
    private Properties props = null;
    private Session sess = null;
    private InternetAddress toAddr = null;
    private InternetAddress fromAddr = null;
    public Email() {
        try{
            props = new Properties();
            props.put("mail.smtp.host","localhost");
            Session sess = Session.getDefaultInstance(props,null);
            this.toAddr = new InternetAddress(to);
            this.fromAddr = new InternetAddress(from);
            this.messageText = new StringBuffer(new Date() + "\n\n");
        } catch (Exception e) {
            e.printStackTrace();
    public boolean sendMessage(){
     try{
            // Create the message object
            Message message = new MimeMessage(sess);
            message.setFrom(fromAddr);
            message.setRecipient(Message.RecipientType.TO, toAddr);
            message.setSubject(subject);
            message.setContent(messageText.toString(),"text/plain");
            // Send Message
            Transport.send(message);
            return true;
     }catch (Exception e){
            e.printStackTrace();
            return false;
    }