As suggested by @jflory7 in How can I figure out what emails are to me and which arent, I’ve changed the site-wide default so that when you reply to a thread, you are automatically set to “watching” that thread, meaning you will get notifications (and potentially email) about any further replies. I also set the threshold by which the site considers posts to be
“new” from two weeks to 2 days.
You can change these defaults on a per-user basis in your notification preferences at https://discussion.fedoraproject.org/my/preferences/notifications.
(Note that the site had an option to make this retroactive. I did not enable that, so this will only affect new posts going forward.) (See below)