Keep your WordPress site clean by blocking signups and comments from temporary or disposable email domains. 100% free, no paid APIs.

Michał Kowalik

Email Blocklist helps you keep your WordPress site safe and clean by preventing registrations and comments from users with disposable, temporary, or otherwise unwanted email domains.
Spam registrations and fake accounts often rely on throwaway email addresses. With Email Blocklist, you can easily stop them at the source. The plugin lets you build and manage your own custom blocklist of domains to prevent low-quality signups, spam comments, and fake interactions.
Unlike many similar plugins, Email Blocklist is completely free and does not rely on any paid APIs or third-party services. Everything runs directly on your WordPress installation. No hidden costs, no subscriptions – just a lightweight solution that does one job and does it well.
This plugin also lets you scan existing users and flag accounts using suspicious or blocked email domains as potential spam, highlighting them in the user list so you can easily filter or remove them if needed.
<h3>External Service Usage</h3>
This plugin uses a public GitHub repository to fetch a global blocklist. 
One JSON file contains the list of blocked domains (https://raw.githubusercontent.com/klapaucius4/email-blocklist/refs/heads/master/blocklist.json), 
and another holds basic metadata (https://raw.githubusercontent.com/klapaucius4/email-blocklist/refs/heads/master/blocklist-meta.json).
The blocklist is downloaded during plugin activation. A daily WP-Cron task checks for updates, 
and the list is refreshed automatically if a newer version is available. 
You can also trigger a manual update from the plugin settings page.
Note: This plugin sends requests to GitHub to fetch the blocklist files. 
By using this plugin, data is transmitted to GitHub under GitHub’s Terms of Service (https://docs.github.com/en/site-policy/github-terms/github-terms-of-service) 
and GitHub Privacy Statement (https://docs.github.com/en/site-policy/privacy-policies/github-privacy-statement).

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