I’ve installed Discourse.
I enabled “Mailing list mode” for myself to get emails about every post (and it works, email delivery works).
However, I don’t get emails about posts that need moderation (either flagged by users or auto-detected by spam rules).
So I only see those posts when I go to the forum.
I imagine there is a setting to configure Discourse to send me an email about posts that require moderator action.
I’m membere of “admins”, “moderators” and “staff” groups, if that’s relevant.