If you wish to control the number of email notifications you are receiving via Moodle, you can adjust your preferences.
The Preferences page can be accessed directly from the user menu in
the top, right corner of any Moodle age (click on your name).
Email digest type
This setting determines how you receive any posts from forums to which you are subscribed, allowing you to receive messages individually or on a daily basis.
This setting lets you decide if you want email copies of posts that are added to forums. If you set this to subscribe, the system will automatically email you copies of new posts in discussions that you post in, unless you manually override it when posting.
Enabling forum tracking means highlighting the posts you have not read yet, which should improve your forum navigation