Classify Email as Bounce (DSN) or Automated Reply

Demonstrates how to use the Chilkat Bounce component to determine if an email is an bounce (DSN) or an automated reply.

Download Chilkat Java Library

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("Failed to unlock component");
        return;
    }

    CkEmail email = new CkEmail();

    //  Load an email from a .eml file.
    //  (This example loads an Email object from a .eml file,
    //  but the object could have been read
    //  directly from a POP3 or IMAP mail server using
    //  Chilkat's POP3 or IMAP implementations.)
    success = email.LoadEml("sampleBounce.eml");
    if (success == false) {
        System.out.println(email.lastErrorText());
        return;
    }

    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
        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!");
    }

  }
}