How to forward mail in java

In Java, you can forward mail using the JavaMail API. Here's a step-by-step guide:

Prerequisites:

  1. You need to have JavaMail API installed in your project. You can add it as a dependency in your Maven project or download the JAR file and add it to your classpath.
  2. You need to have a mail server configured to send and receive emails.

Code Example:

Here's an example code that demonstrates how to forward an email using JavaMail API:

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MailForwarder {
    public static void main(String[] args) {
        // Set up mail server properties
        Properties props = new Properties();
        props.put("mail.smtp.host", "your-mail-server-host");
        props.put("mail.smtp.port", "your-mail-server-port");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");

        // Create a session
        Session session = Session.getInstance(props, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("your-email-username", "your-email-password");
            }
        });

        // Create a message
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
        message.setSubject("Forwarded Email");
        message.setText("This is a forwarded email.");

        // Forward the message
        message.setRecipients(Message.RecipientType.BCC, InternetAddress.parse("[email protected]"));
        Transport.send(message);
    }
}

Explanation:

  1. We set up the mail server properties using the Properties class. You need to replace the placeholders with your actual mail server host, port, username, and password.
  2. We create a session using the Session class, passing the mail server properties and an authenticator that provides the username and password.
  3. We create a MimeMessage object to represent the email message.
  4. We set the from, to, subject, and text of the message using the setFrom, setRecipient, setSubject, and setText methods.
  5. We forward the message by setting the recipients using the setRecipients method. In this example, we're forwarding the message to the "[email protected]" address and copying it to the "[email protected]" address.
  6. Finally, we send the message using the Transport.send method.

Note: