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<?php
//* Forward all WC email notifications
add_filter( 'woocommerce_email_headers', 'nl_forward_wc_email_notifocations', 10, 2);
function nl_forward_wc_email_notifocations($headers, $object) {
    $headers = array();
    $headers[] = 'Bcc: Niels Lange <info@nielslange.com>';
    $headers[] = 'Content-Type: text/html';
    return $headers;
}