In the Post Creator, for a newly created post, after setting all options, click the Publishing options (Publish now 🔽) at the bottom right
In the dropdown menu, select Publish and configure Engagement Booster
A new window will now show already created email lists, where you can select one or more, or you can create a new one with + Add list
Now you can choose if the selected recipient list will get a notification about the publication (Schedule notifications) or not (No notifications)
The Engagement Booster can also be enabled and edited for existing, unpublished posts (Drafts, Approval, ...) via the Engagement Booster tab in the Post Creator.
Managing the recipient lists for the Engagement Booster is done at:
Cockpit > Settings > Engagement Booster.