Rust

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.

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Rust


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

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

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

// Only meaningful for a multipart/report email.
if email.is_multipart_report() {
    let json = chilkat::JsonObject::new();
    if email.get_dsn_info(&json).is_ok() {
        println!("{}", json.emit().unwrap_or_default());
    }

} else {
    println!("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.