You received the webmention from the reply post to your post on my site. So seems mine are sending OK and you are receiving OK. I don’t think I received your webmention. So either I’m not receiving or you’re not sending.

Your mention was to my site as a whole rather than a particular post which might have something to do with it. It should appear at https://doubleloop.net/mentions but I don’t see it. O ye fickle plumbing gods