Dart

Check Whether an Email Is a multipart/report

Demonstrates the Chilkat Email.IsMultipartReport method, which returns true when the top-level message structure is a multipart/report (such as a bounce/DSN or a read receipt/MDN). This example loads an email and reports whether it is a multipart/report.

Background: Automated mail — delivery failures and read receipts — arrives wrapped in the multipart/report structure, which carries machine-readable report parts. Detecting it with IsMultipartReport is the first step in a bounce-handling pipeline: once you know a message is a report, you can pull its parts with GetReport or read delivery fields with GetDeliveryStatusInfo to act on failures automatically.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the IsMultipartReport method, which returns true if the top-level message
  // structure is a multipart/report (such as a bounce / DSN or a read receipt / MDN).

  final email = CkEmail();

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

  if (email.isMultipartReport()) {
    print('This email is a multipart/report (e.g. a bounce or read receipt).');
  } 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.
}