Do WebHooks require an ack?

[DavidTaylor_DPI]

Also see this thread for a discussion of webhook responses:

Best response to an HTTP webhook?

I am writing our webhook code and am wondering at the best response from the stack’s (sender) point of view. I figured it would not be looking at the response so a 204 no content with an empty response body would be the thing that was quickest to receive and signal the webhook is done. I’m also assuming the stack ignores the response status so I guess this could just as well be a 200.