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 16,562 websites that are Spam Protect for Contact Form 7 Customers. We know of 10,089 live websites using Spam Protect for Contact Form 7 and an additional 6,473 sites that used Spam Protect for Contact Form 7 historically and 3,656 websites in the United States.
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Get a list of 16,562 websites using Spam Protect for Contact Form 7 which includes location information, hosting data, contact details, 10,089 currently live websites and an additional 15,817 domains that redirect to sites in this list. 6,473 sites that used this technology previouslyand 3,656 websites in the United States currently using Spam Protect for Contact Form 7.
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