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 16,826 websites that are Spam Protect for Contact Form 7 Customers. We know of 10,760 live websites using Spam Protect for Contact Form 7 and an additional 6,066 sites that used Spam Protect for Contact Form 7 historically and 3,932 websites in the United States.
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Get a list of 16,826 websites using Spam Protect for Contact Form 7 which includes location information, hosting data, contact details, 10,760 currently live websites and an additional 16,802 domains that redirect to sites in this list. 6,066 sites that used this technology previouslyand 3,932 websites in the United States currently using Spam Protect for Contact Form 7.
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