Plugin to block all those spammers (or bots) who fill out forms on WordPress.
https://wordpress.org/plugins/wp-contact-form-7-spam-blocker/
Widgets · WordPress Plugins
Get access to data on 16,636 websites that are Spam Protect for Contact Form 7 Customers. We know of 10,197 live websites using Spam Protect for Contact Form 7 and an additional 6,439 sites that used Spam Protect for Contact Form 7 historically and 3,689 websites in the United States.
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Get a list of 16,636 websites using Spam Protect for Contact Form 7 which includes location information, hosting data, contact details, 10,197 currently live websites and an additional 16,067 domains that redirect to sites in this list. 6,439 sites that used this technology previouslyand 3,689 websites in the United States currently using Spam Protect for Contact Form 7.
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