Eshop product threshold notification not working

As requested by Giang Dinh Truong from my previous request here is a new ticket for:

I am having trouble getting notifications when product stock thresholds are reach. To date I’ve not had one email. Is there something I am missing in the configuration to get this to work.

This is not new ticket.

Please go to www.joomdonation.com/support-tickets.html to submit ticket there.

Sincerely, Giang