In my Control Panel on the Edit Options page, under Messaging & Notification, I have a box labeled “Default Thread Subscription Mode” which I have set to “No email notification”.
You’re welcome! I only recently figured out how to turn on email notifications for a particular subscribed thread, on the rare occasion that I want them. You have to do it from your UserCP on the “List Subscriptions” page.
That’s how you subscribe to a thread, but if you have email notifications turned off by default for your subscriptions, you have to do an extra step if you want to get notifications for a particular subscribed thread.