If you wish to receive copies of all posts via email to use the forum like a mailing list, please follow the steps demonstrated in this video:
Summary in plain words:
- click on your user icon / avatar
- open the Preferences pane
- click on Preferences
- click on Emails
- scroll down to the bottom, click the “Enable mailing list mode” checkbox
- click on “Save Changes”
Replying to the emails will post your responses to the forum, too.