WP-BlackCheck
WP-BlackCheck is an Anti-Spam Solution for Wordpress blocking spam using local detection and a centralized…
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WPComment Blacklist support for Gravity Forms
Wordpress Comment Blacklist support for Gravity Forms adds WordPress default Comment Blacklist support to active…
Shift8 Woocommerce Postal Blocker
Plugin that allows you to input a list of postal / zip codes to block…
CIDRAM
CIDRAM: A PHP-level CIDR/IP-based firewall solution.
AIS: IP Blocker
Blocks malicious IP Addresses, Spammers and Hackers from accessing page without compromising the performance of…
abuse.ch httpBL check
This plugin checks if a visitor is listed on httpBL.abuse.ch.
Back List
Adds Whitelist and Blacklist options for Trackbacks and Pingbacks
WP-Mail-Validator
WP-Mail-Validator is an anti-spam plugin. It provides mail-address validation in 5 ways:
Blacklist keys manager
The increase in efficiency of management of a comment blacklist is attained, and a spam…
Dead-Letter
Dead-Letter.Email for Wordpress. Dead simple disposable email check that just works.
Comments Word Blacklist Manager
Remotely add known terms into the WordPress blacklist keys to manage spam
Geek Mail Blacklist
Block users with certain emails from registering to your WordPress site by adding blacklist rules.
AS Blacklist Customer
Plugin allow admin to add notice for customer to blacklist them. Once on edit order…
Spam to blacklist
Adds IP from comment that marked as spam to standard WordPress blacklist.