Bounced Email Handling

Demonstrates how to examine emails and detect which are bounced (automated) replies. Classifies each email according to the type of bounce.

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkBounce bounce = new CkBounce();

    boolean success;
    success = bounce.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        System.out.println(bounce.lastErrorText());
        return;
    }

    //  The mailman object is used for receiving (POP3)
    //  and sending (SMTP) email.
    CkMailMan mailman = new CkMailMan();

    //  Any string argument automatically begins the 30-day trial.
    success = mailman.UnlockComponent("30-day trial");
    if (success != true) {
        System.out.println(mailman.lastErrorText());
        return;
    }

    //  Set the POP3 server's hostname
    mailman.put_MailHost("mail.chilkatsoft.com");

    //  Set the POP3 login/password.
    mailman.put_PopUsername("myLogin");
    mailman.put_PopPassword("myPassword");

    CkEmailBundle bundle;
    //  Copy the all email from the user's POP3 mailbox
    //  into a bundle object.  The email remains on the server.
    //  (There are other methods for deleting email from a POP3 server.)
    bundle = mailman.CopyMail();

    if (bundle == null ) {
        System.out.println(mailman.lastErrorText());
        return;
    }

    int i;
    CkEmail email;
    for (i = 0; i <= bundle.get_MessageCount() - 1; i++) {
        email = bundle.GetEmail(i);

        success = bounce.ExamineEmail(email);
        if (success == false) {
            System.out.println(bounce.lastErrorText());
            return;
        }

        if (bounce.get_BounceType() == 1) {
            //  Hard bounce, log the email address
            System.out.println("Hard Bounce: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 2) {
            //  Soft bounce, log the email address
            System.out.println("Soft Bounce: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 3) {
            //  General bounce, no email address available.
            System.out.println("General Bounce: No email address");
        }

        if (bounce.get_BounceType() == 4) {
            //  General bounce, log the email address
            System.out.println("General Bounce: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 5) {
            //  Mail blocked, log the email address
            //  A bounce occured because the sender was blocked.
            System.out.println("Mail Blocked: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 6) {
            //  Auto-reply, log the email address
            System.out.println("Auto-Reply: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 7) {
            //  Transient (recoverable) Failure, log the email address
            System.out.println("Transient Failure: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 8) {
            //  Subscribe request, log the email address
            System.out.println("Subscribe Request: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 9) {
            //  Unsubscribe Request, log the email address
            System.out.println("Unsubscribe Request: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 10) {
            //  Virus Notification, log the email address
            System.out.println("Virus Notification: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 11) {
            //  Suspected bounce.
            //  This should be rare.  It indicates that the Bounce
            //  component found strong evidence that this is a bounced
            //  email, but couldn't quite recognize everything it
            //  needed to be 100% sure.  Feel free to notify
            //  support@chilkatsoft.com regarding emails having this
            //  bounce type.
            System.out.println("Suspected Bounce!");
        }

        if (bounce.get_BounceType() == 12) {
            //  Challenge/Response - Auto-reply message sent by SPAM software
            //  where only verified email addresses are accepted.
            System.out.println("Challenge: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 13) {
            //  Address Change Notification Message.
            System.out.println("Address Change: "
                 + bounce.bounceAddress());
        }

        if (bounce.get_BounceType() == 14) {
            //  Success DSN indicating that the message was successfully relayed.
            System.out.println("DSN Successful Relay: ");
        }

    }

    mailman.Pop3EndSession();
  }
}