Dart

Get Delivery-Status Info as JSON

Demonstrates the Chilkat Email.GetDsnInfo method, which — when IsMultipartReport indicates the email is a multipart/report — obtains the delivery-status information as a JsonObject. This example loads a bounce message, confirms it is a report, and prints the extracted DSN details as JSON.

Background: A bounce (DSN) carries its key facts — which recipient failed, the status code, the reporting server — in a machine-readable message/delivery-status part. Rather than parsing those raw fields yourself, GetDsnInfo gathers them into a structured JSON document you can query with the JsonObject API, making it easy to automate bounce handling and prune failed addresses from a mailing list.

Chilkat Dart Downloads

Download Chilkat for Dart

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the GetDsnInfo method, which, for a multipart/report email, obtains the
  // delivery-status information as a JSON object.

  final email = CkEmail();

  try {
    email.loadEml('qa_data/eml/dsn_bounce.eml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Only meaningful for a multipart/report email.
  if (email.isMultipartReport()) {
    final json = CkJsonObject();
    try {
      email.getDsnInfo(json);
      print(json.emit());
    } on ChilkatException {
      // email.getDsnInfo() failed; continue anyway.
    }
  } else {
    print('This email is not a multipart/report.');
  }

  // Note: The path "qa_data/..." is a relative local filesystem path,
  // relative to the current working directory of the running application.
}