Rust

Get a Report Part from a multipart/report Email

Demonstrates the Chilkat Email.GetReport method, which returns the body content of the Nth report within a multipart/report email. The NumReports property gives the count, and indexes are zero-based. This example loads a report email and prints each report part.

Background: A multipart/report message — used for bounces (DSNs) and read receipts (MDNs) — bundles machine-readable report parts alongside the human-readable explanation. GetReport returns the raw content of one such part so a program can parse it, for example to extract the failing recipient and status code from a bounce. Use GetDeliveryStatusInfo for direct field-level access to the delivery-status part.

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// Demonstrates the GetReport method, which returns the body content of the Nth report
// within a multipart/report email.  The NumReports property gives the number of reports;
// indexes are zero-based.

let email = chilkat::Email::new();

if email.load_eml("qa_data/eml/dsn_bounce.eml").is_err() {
    println!("{}", email.last_error_text());
    return;
}

let n = email.num_reports();
println!("NumReports = {}", n);

for i in 0..n {
    println!("---- Report {} ----", i);
    println!("{}", email.get_report(i).unwrap_or_default());
}

// A report returned by GetReport is the body of a report part -- for a bounce (DSN),
// that is the machine-readable message/delivery-status part.  It looks similar to:
// 
//   Reporting-MTA: dns; mail.example.com
//   Received-From-MTA: dns; sender.example.com
//   Arrival-Date: Fri, 10 Jul 2026 20:15:30 +0000
// 
//   Final-Recipient: rfc822; nonexistent@example.com
//   Action: failed
//   Status: 5.1.1
//   Diagnostic-Code: smtp; 550 5.1.1 <nonexistent@example.com> User unknown

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