Restock Rocket sends your customers email notifications automatically for a product variant once the inventory quantity is updated from 0 to 1 unit or more.

If you have set up a minimum stock threshold to send back in stock emails to your customers, Restock Rocket will only send emails to your customers automatically once the inventory quantity has reached the minimum stock threshold you have defined in your Settings under “Email settings”.

Minimum Stock Threshold for Back in Stock Emails - Restock Rocket

If you believe that your customers are not being sent email notifications even after updating your inventory, please reach out to us for support at [email protected].