ethanpil

Install this plugin into any WordPress system with a working Gravity Forms plugin and all known disposable email address hosts will be rejected and fail validation. This only checks the field type “email” and does not require any configuration or special settings. Its global, if its turned on, then its working.
Thanks to adamloving for the initial list: https://gist.github.com/adamloving/4401361
This WordPress plugin is brought to you by <a href="https://www.angeleswebdesign.com" title="Los Angeles Web Design WordPress Experts" rel="nofollow ugc">Los Angeles Web Design</a>

Gravity Forms Reject Disposable Emails

Reject disposable email addresses in Gravity Forms email fields.

ClearBounce

ClearBounce Email Verification validates email addresses in real-time using the <a href="https://clearbounce.net" rel="nofollow ugc">ClearBounce</a> email verification API. Stop fake signups, reduce bounces, and protect your sender reputation.
Key Features:
<ul>
<li>Real-time email verification via SMTP-level checks</li>
<li>Block undeliverable, disposable, role-based, and risky emails</li>
<li>Typo detection with “Did you mean…?” suggestions</li>
<li>Smart caching to minimize API calls</li>
<li>Fail-open design ensures forms always work, even during API outages</li>
<li>Detailed verification logs and statistics</li>
<li>Customizable error messages</li>
<li>Works with WordPress registration, comments, and all major form plugins</li>
</ul>
Supported Integrations:
<ul>
<li>WordPress Registration</li>
<li>WordPress Comments</li>
<li>WooCommerce (checkout and registration)</li>
<li>Contact Form 7</li>
<li>Gravity Forms</li>
<li>WPForms</li>
<li>Elementor Pro Forms</li>
<li>Ninja Forms</li>
<li>Fluent Forms</li>
<li>Fallback mode (hooks into is_email for universal coverage)</li>
</ul>
How It Works:
<ol>
<li>A visitor submits a form with an email address</li>
<li>ClearBounce verifies the email in real-time (SMTP check, MX records, disposable detection, etc.)</li>
<li>If the email fails your configured rules, the form shows a friendly error message</li>
<li>Valid emails pass through normally with zero friction</li>
</ol>
What ClearBounce Checks:
<ul>
<li>Email syntax validation</li>
<li>MX record verification</li>
<li>SMTP mailbox verification</li>
<li>Disposable email detection</li>
<li>Role-based email detection (info@, admin@, etc.)</li>
<li>Free email provider detection</li>
<li>Catch-all domain detection</li>
<li>Typo detection with smart suggestions</li>
</ul>

ClearBounce Email Verification

Real-time email verification for WordPress. Block invalid, disposable, and risky email addresses on registration, comments, checkout, and forms.

Gravity Forms Reject Disposable Emails vs ClearBounce Email Verification