This refers to Moodle 3.11 from August 2022 onwards
In your profile there is a setting to get Moodle to mark new forum posts for you:
- Go to your dashboard by clicking 'University logo' on the top left

- Open your personal menu and click 'Preferences'

3. Click Forum preferences

4. Under "Forum tracking" ensure it is set to 'Yes: highlight new posts for me'

5. Click on the 'Save Changes' button at the bottom of the page to update your preferences
You will then see new posts highlighted in a number of ways, for example on the main module page:

or when you go into the forum:

To receive an email every time someone posts
This means that you will receive an email (either every time someone posts or once a day, depending on your profile settings)
- On the 'Forum preferences' (see steps 1-3 above), ensure that the "Forum auto-subscribe" should be set to 'Yes: when I post, subscribe me to that forum discussion'

2. When you have completed changes, click the 'Save changes' button