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 16,206 websites that are Spam Protect for Contact Form 7 Customers. We know of 9,530 live websites using Spam Protect for Contact Form 7 and an additional 6,676 sites that used Spam Protect for Contact Form 7 historically and 3,463 websites in the United States.
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Get a list of 16,206 websites using Spam Protect for Contact Form 7 which includes location information, hosting data, contact details, 9,530 currently live websites and an additional 15,704 domains that redirect to sites in this list. 6,676 sites that used this technology previouslyand 3,463 websites in the United States currently using Spam Protect for Contact Form 7.
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