by Raisul Islam Shagor on WordPress.org
Block specific email addresses from using your WordPress site. Stop fake orders, spam registrations, and unwanted comments.

Admin settings page to manage blocked emails.
= Spam Defender – Email Blocker helps you reduce spam and fake activity by blocking specific email addresses or domains.
Once blocked, users with those emails will not be able to: =
This plugin is lightweight, easy to use, and comes with an admin settings page where you can manage blocked emails/domains.
Features:
* Block emails globally across WordPress.
* Block on login, registration, comments, and WooCommerce checkout.
* Manage blocked emails from settings page.
* Search blocked email lists.
* Prevents fake orders and spam signups.