UserCheck

<p>UserCheck blocks disposable and throwaway email addresses from your sign-up forms. The result: less spam, fewer fake accounts, and a cleaner user base.</p>
<h4>Supported plugins</h4>
<p>If you’re using any of these, UserCheck protects them automatically — nothing to configure:</p>
<ul>
<li>WordPress core (registration, comments, multisite signup, profile email change)</li>
<li>WooCommerce (classic checkout, Cart/Checkout Block, account registration, Edit-account email change)</li>
<li>Profile Builder (free + Pro)</li>
<li>Contact Form 7</li>
<li>WPForms</li>
<li>Elementor Pro Forms</li>
<li>Gravity Forms</li>
<li>Fluent Forms</li>
<li>Ninja Forms</li>
<li>Formidable Forms</li>
<li>MailPoet</li>
</ul>
<h4>Fallback for unsupported plugins</h4>
<p>For plugins without a built-in integration, a fallback check catches sign-ups from any other form on your site. It only runs when someone submits a form, so it won’t slow down your dashboard or background tasks. You can turn it off under Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> UserCheck <span aria-hidden="true" class="wp-exclude-emoji">→</span> Coverage.</p>
<h4>Choose what to block</h4>
<p>Pick which kinds of email addresses get blocked: domains that can’t receive email, disposable addresses, public providers (Gmail, Yahoo, etc.), forwarding services that hide the real address, and known spammers. Domains on your UserCheck account blocklist are always blocked.</p>
<h4>Lightweight by design</h4>
<p>Emails are checked only when users submit a form (registration, comment, checkout) — never re-checked for existing users or orders. No background scans, no surprises.</p>
<h4>Resilient by design</h4>
<p>If our service is ever down or slow, your site keeps working: sign-ups go through and the error is logged for review. Each request times out after 2 seconds, so an unresponsive API can’t hold up your forms.</p>
<h4>Full email or domain only</h4>
<p>Send the full email (more accurate) or just the domain.</p>
<h4>Extensible</h4>
<p>Developers can plug UserCheck into any plugin’s validation hook by calling <code>UserCheck::instance()->evaluate_email( $email )</code> and acting on the returned <code>action</code>, <code>reason</code>, and <code>message</code>.</p>
<h4>Translation ready</h4>
<p>All text in the plugin can be translated into any language.</p>
<h4>Works out of the box</h4>
<p>No configuration required. A free API key unlocks higher request limits.</p>
<p>Powered by <a href="https://www.usercheck.com" rel="nofollow ugc">UserCheck</a>, which tracks new disposable email providers as they appear so your site’s protection stays current.</p>
<h3>Privacy Policy</h3>
<p>The plugin sends the email address (or just its domain, depending on your settings) to the UserCheck API for validation. The request User-Agent identifies the plugin version, WordPress version, site URL, and which integration triggered the check (e.g. <code>wp_registration</code>, <code>wc_checkout</code>, or <code>fallback_is_email/<plugin-slug></code> when the fallback fires for an unsupported plugin). No other end-user data is sent. For more information on how UserCheck handles data, please visit <a href="https://www.usercheck.com/privacy" rel="nofollow ugc">https://www.usercheck.com/privacy</a>.</p>


Block disposable and throwaway email addresses on your WordPress site.

debounce

<h3>🚀 Transform Your Email Quality with AI-Powered Validation</h3>
<p>Tired of fake emails, spam traps, and disposable addresses cluttering your database? DeBounce Email Validator is the ultimate solution for WordPress websites that demand real, deliverable email addresses.</p>
<h3>Why Choose DeBounce?</h3>
<ul>
<li><strong>99.9% Accuracy Rate</strong> – Industry-leading validation precision  </li>
<li><strong>Zero IP Impact</strong> – No emails sent, no blacklisting risk  </li>
<li><strong>GDPR Compliant</strong> – Complete privacy protection  </li>
<li><strong>Real-time Validation</strong> – Instant feedback for users  </li>
<li><strong>Advanced AI Detection</strong> – Catches sophisticated spam attempts</li>
</ul>
<h3>Perfect For</h3>
<ul>
<li>E-commerce stores (WooCommerce)  </li>
<li>Lead generation forms  </li>
<li>User registration systems  </li>
<li>Contact forms  </li>
<li>Newsletter signups  </li>
<li>Any WordPress form  </li>
</ul>
<p>Install, connect your API key, and watch your email quality soar while reducing spam and improving conversion rates.</p>
<h3>Supported Forms and Plugins</h3>
<p><strong>🛒 E-COMMERCE & BUSINESS FORMS</strong></p>
<ul>
<li>WooCommerce – Validate shipping and billing emails  </li>
<li>Gravity Forms – Enterprise-grade form validation  </li>
<li>Contact Form 7 – Most popular contact form plugin  </li>
<li>WPForms – Drag & drop form builder  </li>
</ul>
<p><strong>🏗️ ADVANCED FORM BUILDERS</strong></p>
<ul>
<li>Ninja Forms – Professional form creation  </li>
<li>Formidable Forms – Complex form solutions  </li>
<li>Forminator – Modern form builder  </li>
<li>Fluent Forms – Advanced form management  </li>
<li>Elementor Forms – Page builder integration  </li>
<li>WSForms – Premium form builder  </li>
</ul>
<p><strong>⚙️ WORDPRESS CORE FEATURES</strong></p>
<ul>
<li>WordPress Comments – Validate commenter emails  </li>
<li>User Registration – Ensure valid signup emails  </li>
<li>Jetpack Forms – Automattic’s form solution  </li>
</ul>
<p><strong>🔧 CUSTOM INTEGRATION</strong></p>
<ul>
<li>Any Custom Form – Works with <code>is_email()</code> function  </li>
<li>Third-party Plugins – Automatic compatibility  </li>
<li>API Integration – Direct API access available</li>
</ul>
<h3>Key Features</h3>
<p><strong>🔍 CORE VALIDATION CHECKS</strong></p>
<ul>
<li>DNS & MX Record Validation – Verify domain authenticity  </li>
<li>Syntax Verification – IETF/RFC standard compliance  </li>
<li>Mailbox Existence – Confirm email actually exists  </li>
<li>SMTP Connection Testing – Real server verification  </li>
</ul>
<p><strong>🛡️ SECURITY & SPAM PROTECTION</strong></p>
<ul>
<li>Disposable Email Detection – Block temporary email services  </li>
<li>Spam Trap Identification – Prevent honeypot emails  </li>
<li>Typosquatting Prevention – Catch misspelled domains  </li>
<li>Role-based Email Filtering – Block info@, admin@, etc.  </li>
<li>Custom Blocklist – Your own domain/email restrictions  </li>
</ul>
<p><strong>⚡ PERFORMANCE & RELIABILITY</strong></p>
<ul>
<li>Real-time Validation – Instant user feedback  </li>
<li>Temporary Unavailability Detection – Handle server issues  </li>
<li>Catch-All Domain Testing – Identify low-quality domains  </li>
<li>Greylisting Detection – Advanced spam protection  </li>
<li>99.9% Accuracy Rate – Industry-leading precision  </li>
</ul>
<p><strong>🔒 PRIVACY & COMPLIANCE</strong></p>
<ul>
<li>GDPR Compliant – No email storage  </li>
<li>Zero IP Impact – No emails sent from your servers  </li>
<li>Secure API Communication – Encrypted data transfer  </li>
<li>Privacy-First Design – Your data stays private  </li>
</ul>
<p><strong>📊 ANALYTICS & MONITORING</strong></p>
<ul>
<li>Validation Logs – Track all validation attempts  </li>
<li>Performance Metrics – Monitor validation success rates  </li>
<li>Custom Error Messages – Branded user feedback  </li>
<li>Multi-language Support – Global accessibility  </li>
</ul>
<p><strong>Start with 100 Free Validations</strong> – <a href="https://debounce.com/pricing/" rel="nofollow ugc">Get your API key now</a></p>


DeBounce Email Validator


This plugin is very useful and I have used it on my site. Recently, it has been developed very well and good facilities have been added to it. thank you very much


Greate Plugin

Real-time email validation for WordPress forms. Block invalid, disposable, and risky emails to keep your database clean and improve deliverability.

UserCheck vs DeBounce Email Validator