Currently there is no way to receive email notification about every post. Your choices for email notifications are limited to those listed in Notification Preferences.
The good news is that this feature is currently in development and should be available early next year.
This feature is now available!
The Notification Preferences in your profile include the option to subscribe to entire Categories and receive emails about each new post in that Category.
(See this post for how to find your Notification Preferences.)
Update ... Happy New Year! The update will be available early in THIS year, 2020.
Thank you! Losing the daily digests would be an unhappy situation. It was always the best way to get information quickly without spending all day on the forum.