The Newsletters add-on is a basic tool to send emails to lead sources, users and roles. This add-on requires Business Manager 1.2.2 or higher.
The add-on is only visible for users with the admin or manager role.
As said, it is (still) quite simple. It is not yet possible to use variables in the email, or to view statistics such as how many people have opened the email. It really is a way to quickly send emails to users in the system, with a flexible drag and drop email builder.