You can configure EasyDiscuss subscription feature at EasyDiscuss > Settings > Notifications > Subscriptions as shown in the following screenshot.
- Enable Site Wide Subscription
Site wide subscriptions are great to allow users to subscribe to site wide discussion updates - Enable Category Subscription
If enabled, users will be allowed to subscribe to categories. - Include Replies In Subscriptions
If enabled, users will also be notified when new replies are posted - Include Comments In Subscriptions
If enabled, users will also be notified when new comments are posted - Enable Single Post Subscription
If enabled, users will be allowed to subscribe to questions. - Auto Subscribe When Replying To Topic
When this option enabled, user will automatically subscribed to the topic that the user posted the reply. This option required 'Allow post subscriptions' to be enabled. - Auto Subscribe User When They Register
When this option enabled, EasyDiscuss will automatically subscribe the user to sitewide subscription when they register on the site. - Auto Subscribe Author To Their Own New Post
When this option enabled, EasyDiscuss will automatically subscribe the author to their own post when they created new discussion posts. - Moderator Auto Subscribe When Replying To Topic
When this option enabled, moderator will automatically subscribed to the topic that he/she posted the reply. This option required 'Auto Subscribe When Replying To Topic' to be enabled. - Allow Non Registered Users To Subscribe
If enabled, guests are allowed to subscribe for updates
