If you are constantly logged into DIscourse, you won’t get emails. However, you’ll get notifications (look for little blue numbers next to the speech bubble in the upper right corner of the page).
That may be the cause then. Thanks for explaining about the little blue numbers I’ll try and keep an eye on those. I’d personally like to still get emails when logged in if it becomes a possible option.
The document is correct; the key is so that discourse.org has permission to send via our mailserver on behalf of your domain. From the bit we host which is of course, this URL, discourse.mcneel.com