Thanks Alan - a good shout, but I have two accounts both set to instant (double checked just in case). Neither received the noticification.
I have a WordPress site I manage and once a post has gone the email system marks it as "done" and even if I change or unpublish it wont send again. Try copying the content to a new post and then hit publish
Thanks for this. I just unpublished and republished the post and that triggered the email notification. I'm unsure why the original publish didn't trigger a notification.