Problem with "Register New Subscribers as Users"

Hi, I would like all new users added to the database, but would like to control whether they get an email and how that email looks. As of now, having that enabled generates a generic message from [email protected] (not a real email address) with generic text and a password/activation link. Where is that message coming from??? Can it be customized?

Or, is there an easier workaround for automatically adding newsletter subscribers to the user database.

Thanks!

https://www.ads-software.com/plugins/newsletters-lite/