New 3rd-party plugin
Protect your Sngine community from fake accounts and spammers with StopForumSpam Email Blocker Sngine Addon this standalone add-on that connects directly to the StopForumSpam API. Instantly checks new signups against a global database of known spam email addresses and blocks them before they even get in.
Demo:
https://sngine.scriptstribe.com
Try to SIGNUP with a spam email available at stopforumspam.com or using this list of domain
https://raw.githubusercontent.com/…/master/blacklist.txt
Key Features:
Real-time API lookup – Checks signups against StopForumSpam’s vast database of reported spam emails
Blocks known spammers during signup – no cron jobs, no user intervention needed
No account or API key required – works out of the box using their public API
Fast and lightweight – Doesn’t slow down your registration page
Easy integration – Just one code block added to a core file and you’re protected!
Link:
https://scriptstribe.com/stopforumspam-email-blocker…
Note:
This is a third-party plugin developed by a different team and developer. As the Sngine team always encourages developers to add more and more features to our beloved Script “Sngine,” we welcome this plugin 
