higherfield

Kaigai Spam Mail Blocker is a WordPress plugin that automatically detects and blocks spam or abusive contact form submissions, especially those originating from overseas.
The plugin analyzes submitted content and blocks messages that do not contain Japanese characters or consist primarily of alphanumeric characters, which are common patterns in spam messages.
Supported form plugins:
<ul>
<li>Contact Form 7</li>
<li>Elementor Pro Forms</li>
</ul>
No configuration is required. Simply install and activate the plugin.

Kaigai Spam Mail Blocker

Blocks spam submissions from overseas contact forms. Supports Contact Form 7 and Elementor Pro Forms.

jack111111

This plugin allows you to block certain countries and/or continents. After selecting the areas you want to block and saving (the area that you are detected as being in is disabled from being blocked), visitors with IPs from those areas will recieve an “about:blank” web page. 
In order to find information about visitors, we use geoplugin.net. This may slow your website down especially if you have many users. See it’s AUP https://www.geoplugin.com/aup and privacy policy https://www.geoplugin.com/privacy
<h3>3rd Party service</h3>
See https://www.geoplugin.com/

Kaigai Spam Mail Blocker vs Country and Continent Blocker