如何在$ woocommerce-> mailer（）中添加Reply-To标题

I had a custom WooCommerce mailer function below for sending emails to customers as a notification of there purchase, but I got a requirement to add reply-to tag.

To describe in detail, customer has to get email($order->billing_email) for the order notification from store@mycompany.com and need to append reply-to tag for support@mycompany.com.

What this does is that emails will be send from store@mycompany.com, but when customers hit reply when they want to ask us any questions, these replies will go to support@mycompany.com

Can any one help me how to change the $mailer->send function to achieve the requirement ?

function my_awesome_publication_notification($order_id, $checkout=null) {
   global $woocommerce;
   $order = new WC_Order( $order_id );
   if($order->status === 'completed' ) {
      // Create a mailer
      $mailer = $woocommerce->mailer();

      $message_body = __( 'Hello world!!!' );

      $message = $mailer->wrap_message(
        // Message head and message body.
        sprintf( __( 'Order %s received' ), $order->get_order_number() ), $message_body );


      // Client email, email subject and message.
     $mailer->send( $order->billing_email, sprintf( __( 'Order %s received' ), $order->get_order_number() ), $message );
     }

   }
}

Added Compatibility for Woocommerce 3+

When looking at Class WC_Email at the send() function you have:

send( string $to, string $subject, string $message, string $headers, string $attachments )

Transposing this to your code, $headers could be used this way:

function my_awesome_publication_notification($order_id, $checkout=null) {
    global $woocommerce;

    // Get order object.
    $order = new WC_Order( $order_id );

    $order_status = method_exists( $order, 'get_status' ) ? $order->get_status() : $order->status;

    if( $order_status === 'completed' ) {

        // Create a mailer
        $mailer = $woocommerce->mailer();

        $message_body = __( 'Hello world!!!' );

        // Message head and message body.
        $message = $mailer->wrap_message( sprintf( __( 'Order %s received' ), $order->get_order_number() ), $message_body );

        // Here is your header
        $reply_to_email = 'support@mycompany.com';
        $headers = array( sprintf( 'Reply-To: %s', $reply_to_email ) );
        // Or instead, try this in case:
        // $headers = 'Reply-To: ' . $reply_to_email . '
';

        // Client email, email subject and message (+ header "reply to").
        $mailer->send( $order->billing_email, sprintf( __( 'Order %s received' ), $order->get_order_number() ), $message, $headers );
    }
}

This should work. Please take a look to last reference code, as it's very similar to yours…

References: