You can update your Joomla backend and FTP access at http://stackideas.com/dashboard/site and can you add my current IP address 175.144.21.217 into your server whitelist because I was unable to access your site.
You can enable the 'Receive System Emails' setting in the Joomla user by: 1. Click>User>manage>choose user admin:https://www.screencast.com/t/DDjjh0Oavbn
You can give it a try