Is it possible to add the customer's name to the email headers in WooCommerce?

Question

WooCommerce does not include the customer's name in the To: field of the headers when sending out emails. I'm trying to add them myself with the WooCommerce email recipient filters, but I'm running into a bit of a roadblock.

The code is being triggered as expected, but the messages don't seem to be arriving.

Here's my current code:

function add_customer_name_to_email_header($recipient, $order) {
    // Don't run if something else has already modified it and added a name somehow.
    if (filter_var($recipient, FILTER_VALIDATE_EMAIL)) {
        $first_name     = $order->get_billing_first_name();
        $last_name      = $order->get_billing_last_name();
        $recipient_name = trim($first_name . ' ' . $last_name);
        $recipient_name = sanitize_text_field($recipient_name);
        if (!empty($recipient_name)) {
            $recipient = sprintf('"%s" <%s>', htmlspecialchars($recipient_name), $recipient);
        }
    }
    return $recipient;
}
add_filter('woocommerce_email_recipient_customer_note', 'add_customer_name_to_email_header', 10, 2);
add_filter('woocommerce_email_recipient_customer_completed_order', 'add_customer_name_to_email_header', 10, 2);
add_filter('woocommerce_email_recipient_customer_invoice', 'add_customer_name_to_email_header', 10, 2);
add_filter('woocommerce_email_recipient_customer_processing_order', 'add_customer_name_to_email_header', 10, 2);

I've confirmed that it is properly generating the correctly-formatted value for that field, e.g.: "John Doe" <jdoe@example.com>, but messages don't actually arrive once the $recipient value has been modified.

My suspicions are that WooCommerce or WordPress are further sanitizing the recipient value before the email is sent, probably stripping out or modifying characters like < and >, but I don't know for sure. Is there any existing method for this I just haven't found, or a known way around this?

Is it possible to add the customer's name to the email headers in WooCommerce?

0 Answers0