Java

Create DSN (Delivery Status Notification) Email

See more Email Object Examples

Demonstrates how to create a DSN (Delivery Status Notification) Email having the format as defined in RFC 3464. Java

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[])
  {
    boolean success = false;

    CkEmail email = new CkEmail();

    email.put_Subject("Test");
    email.put_From("joe@example.com");
    email.put_Body("This is a test");
    email.AddTo("","recipient@example.com");

    System.out.println(email.getMime());
    System.out.println("");
    System.out.println("-------------------------------------------------------------");
    System.out.println("");

    //  This is the email we just created:

    //  MIME-Version: 1.0
    //  Date: Mon, 12 May 2025 11:13:15 -0500
    //  Message-ID: <917FA49F75544EF51948B0A52F403B925B51073F@SLICE>
    //  Content-Type: text/plain; charset=us-ascii; format=flowed
    //  Content-Transfer-Encoding: 7bit
    //  X-Priority: 3 (Normal)
    //  Subject: Test
    //  From: joe@example.com
    //  To: recipient@example.com
    //  
    //  This is a test

    //  -----------------------------------------------------------------
    //  Convert the above email into a DSN (Delivery Status Notification)

    CkXml xml = new CkXml();
    xml.put_Tag("DeliveryStatusFields");
    xml.NewChild2("Final-Recipient","rfc822; recipient@example.com");
    xml.NewChild2("Action","failed");
    xml.NewChild2("Status","5.1.2");
    xml.NewChild2("Diagnostic-Code","smtp; 550 5.1.2 Host unknown (Domain name not found)");
    CkDateTime dtNow = new CkDateTime();
    dtNow.SetFromCurrentSystemTime();
    xml.NewChild2("Last-Attempt-Date",dtNow.getAsRfc822(true));

    boolean headerOnly = true;
    CkStringBuilder sbText = new CkStringBuilder();
    sbText.Append("This is an automatically generated Delivery Status Notification.\r\n\r\n");
    sbText.Append("Delivery to the following recipient failed permanently:\r\n\r\n");
    sbText.Append("    recipient@example.com\r\n\r\n");
    sbText.Append("Technical details of permanent failure:\r\n");
    sbText.Append("DNS Error: Domain name not found\r\n");

    String explain = sbText.getAsString();

    CkEmail dsnEmail = new CkEmail();
    success = email.ToDsn(explain,xml.getXml(),headerOnly,dsnEmail);
    if (success == false) {
        System.out.println(email.lastErrorText());
        return;
        }

    System.out.println(dsnEmail.getMime());

    //  Here's the MIME of the DNS email we just created:
    //  -------------------------------------------------

    //  Content-Type: multipart/report; report-type="delivery-status"; boundary="------------060100020300020303000802"
    //  
    //  --------------060100020300020303000802
    //  Content-Type: text/plain; charset=windows-1252; format=flowed
    //  Content-Transfer-Encoding: 7bit
    //  
    //  This is an automatically generated Delivery Status Notification.
    //  
    //  Delivery to the following recipient failed permanently:
    //  
    //      recipient@example.com
    //  
    //  Technical details of permanent failure:
    //  DNS Error: Domain name not found
    //  
    //  --------------060100020300020303000802
    //  Content-Type: message/delivery-status
    //  
    //  Final-Recipient: rfc822; recipient@example.com
    //  Action: failed
    //  Status: 5.1.2
    //  Diagnostic-Code: smtp; 550 5.1.2 Host unknown (Domain name not found)
    //  Last-Attempt-Date: Mon, 12 May 2025 11:30:39 -0500
    //  
    //  --------------060100020300020303000802
    //  Content-Type: text/rfc822-headers; charset=windows-1252
    //  
    //  MIME-Version: 1.0
    //  Date: Mon, 12 May 2025 11:30:39 -0500
    //  Message-ID: <B8E6875D582A78AE779FC0B46ACC8C858CEAF608@SLICE>
    //  Content-Type: text/plain; charset=us-ascii; format=flowed
    //  Content-Transfer-Encoding: 7bit
    //  X-Priority: 3 (Normal)
    //  Subject: Test
    //  From: joe@example.com
    //  To: recipient@example.com
    //  --------------060100020300020303000802--
  }
}