Hi @Anonymous ,
Check out Vye: Automated Email Alerts app. It sends automated emails about new and updated products. When customers search for items on your store, they can sign up to receive email updates when you add a new product or update an existing product that matches their interests.
Vye can add a form to any page so that customers can signup for email updates.
Customers can also subscribe to receive email alerts when a specific collection or product tag is updated.
If you need any help setting it up let me know.