Asif Rahaman

<p><strong>Sparrow Email OTP Verification for Contact Form 7</strong> provides a robust security layer for your website by verifying user email addresses before form submission. This effectively blocks bots, spammers, and malicious actors from flooding your inbox with fake data or invalid leads.</p>
<h3>Why this plugin is different:</h3>
<p>Most existing OTP plugins require you to pay for their proprietary API or use their specific SMTP service to send codes. This often leads to unexpected monthly costs and vendor lock-in.</p>
<p>This plugin is built with a <strong>“Your Server, Your Rules”</strong> philosophy. It sends OTP codes using the native <code>wp_mail()</code> function, meaning it utilizes your website’s default mail configuration or your preferred SMTP service. <strong>There are no extra costs, no hidden fees, and no third-party accounts required.</strong></p>
<h3>Features</h3>
<ul>
<li><strong>Block Bots & Spam:</strong> Ensure every submission comes from a person with a valid, accessible email address.</li>
<li><strong>Conditional Display (New v1.1.0):</strong> Dynamically hide verification elements inside an elegant wrapper box until an email string is typed.</li>
<li><strong>Cost-Effective:</strong> Zero cost to send OTPs—it uses your existing server or SMTP setup.</li>
<li><strong>Privacy First:</strong> No data is sent to external verification APIs; everything stays on your server.</li>
<li><strong>Smart Detection:</strong> Automatically finds the email field in your Contact Form 7 forms.</li>
<li><strong>Security-First Rate Limiting:</strong> Built-in protection to prevent OTP request abuse by limiting users to 3 attempts per 5 minutes per IP address.</li>
<li><strong>Lightweight:</strong> Minimal footprint to ensure your site remains fast and passes Core Web Vitals.</li>
</ul>


Sparrow Email OTP Verification for Contact Form 7

Verify user emails with a secure OTP code to block bots and fake leads. Uses your own SMTP—no API fees, no subscriptions.

clearoutio

<p>Clearout Email Validation plugin seamlessly integrates with all major forms to validate the email addresses in real time.</p>
<p>The plugin performs 20+ refined real-time validation checks to determine the current status of the email address. These checks include extensive verifications like greylist verification, anti-spam check, gibberish check, catch-all verification, email blacklist verification, temporary email address check, and more.</p>
<h4>Key Benefits of Using Clearout Email Verification Plugin:</h4>
<ul>
<li>Accept only <strong>safe-to-send</strong> email address to <strong>protect your sender reputation</strong></li>
<li>Accept only <strong>business or work email addresses</strong></li>
<li><strong>Prevent fraudulent signups or leads getting into CRM</strong> by stopping <a href="https://clearout.io/blog/2020/09/30/dont-let-your-email-campaigns-be-a-victim-of-disposable-email-addresses" rel="nofollow ugc">temporary / disposable / throw away email addresses</a></li>
<li><strong>Customization to Block free email address providers</strong> like gmail.com / yahoo.com / hotmail.com</li>
<li><strong>Remove</strong> duplicate and <strong>alias email addresses</strong></li>
</ul>
<h4>How to Install Clearout Email Verifier Plugin</h4>
<p><strong>Obtain an API Token:</strong><br />
1. <strong>Log in</strong> to your Clearout account.<br />
2. Navigate to the <a href="https://app.clearout.io/developer/api/list" rel="nofollow ugc">‘Developer’</a> menu and click on <strong>‘+ Create API Token’</strong>.<br />
3. Add the necessary details for reference, and click on “Create” to generate the API token.</p>
<p><strong>Create a Clearout Account (if you don’t have one):</strong><br />
1. <a href="https://app.clearout.io/register" rel="nofollow ugc">Sign up</a> for a Clearout account to <strong>get 100 free email validation credits with no credit card required</strong>.</p>
<p>For more detailed instructions, visit Clearout <a href="https://clearout.io/integrations/wordpress/" rel="nofollow ugc">Email Verifier Plugin Installation</a>.</p>
<p><span class="embed-youtube" style="text-align:center; display: block;"><iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/YG5BrBn7FHo?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe></span></p>
<h4>Supported Forms/Plugins</h4>
<p>The Clearout email verification plugin supports a rich set of popular form-based plugins by listening to email address capture flow or by hooking into WordPress is_email() function:</p>
<ul>
<li>Elementor Form</li>
<li>Gravity Forms</li>
<li>Forminator Form</li>
<li>WooCommerce Checkout Forms</li>
<li>WooCommerce Registration Form</li>
<li>Fluent Form</li>
<li>WP Forms</li>
<li>Formidable forms</li>
<li>WS Form </li>
<li>WP-Members</li>
<li>Contact Form</li>
<li>Mailster Form</li>
<li>MailChimp</li>
<li>Ninja Forms</li>
<li>Profile Builder</li>
<li>Ultimate Member registration form</li>
<li>Users Ultra registration form</li>
<li>JetPack comments and a contact form</li>
<li>MailPoet</li>
<li>Theme My Login</li>
<li>Paid Memberships Pro</li>
<li>Form Maker by 10Web</li>
<li>Visual Form Builder</li>
<li>Any WordPress registrations & contact forms   </li>
</ul>
<h4>Key Features</h4>
<ul>
<li>Accurate Email Verification</li>
<li>Fastest Real-time Email Validation</li>
<li>Seamless API Integration</li>
<li>Guaranteed Deliverability (Safe to send)</li>
<li>High Precision Advanced Catch-all Resolver</li>
<li>Block Role Email</li>
<li>Block Disposable Email</li>
<li>Block Gibberish Email</li>
<li>Email / Domain Allowlisting and Blocklisting</li>
<li>Custom Error Message</li>
<li>Limit email validation to only required pages</li>
<li>Low Credit Notification Alert</li>
<li>Team Accounts</li>
<li>Syntax Verification</li>
<li><a href="https://docs.clearout.io/api-overview.html#testing" rel="nofollow ugc">Test email addresses</a></li>
</ul>
<h4>Know A Little More About Clearout Email Verification Service</h4>
<p>In addition to its availability as a WordPress Plugin, Clearout Email Verifier supports email verification in multiple forms and ways to meet the needs of the user. Other verification methods supported by Clearout Email Verifier are – Bulk email list validation, real-time email validation API, and Form Guard Email Validation.</p>
<h4>FURTHER READING</h4>
<p>More about Clearout Email Verification</p>
<ul>
<li><a href="https://clearout.io/email-verification-api/" rel="nofollow ugc">https://clearout.io/email-verification-api/</a></li>
<li><a href="https://clearout.io/disposable-email-checker/" rel="nofollow ugc">https://clearout.io/disposable-email-checker/</a></li>
<li><a href="https://clearout.io/integrations/" rel="nofollow ugc">https://clearout.io/integrations/</a></li>
<li><a href="https://clearout.io/help/" rel="nofollow ugc">https://clearout.io/help/</a></li>
<li><a href="https://docs.clearout.io/" rel="nofollow ugc">https://docs.clearout.io/</a></li>
</ul>
<p>Other Clearout Services</p>
<ul>
<li><a href="https://clearout.io/email-finder/" rel="nofollow ugc">https://clearout.io/email-finder/</a></li>
<li><a href="https://clearout.io/sales-prospecting/chrome-extension/" rel="nofollow ugc">https://clearout.io/sales-prospecting/chrome-extension/</a></li>
<li><a href="https://clearout.io/sales-prospecting/advanced-data-enrichment/" rel="nofollow ugc">https://clearout.io/sales-prospecting/advanced-data-enrichment/</a></li>
<li><a href="https://clearout.io/reverse-lookup/linkedin/" rel="nofollow ugc">https://clearout.io/reverse-lookup/linkedin/</a></li>
<li><a href="https://clearout.io/reverse-lookup/email/" rel="nofollow ugc">https://clearout.io/reverse-lookup/email/</a></li>
</ul>


Clearout Email Validator – Real-Time Email Verification on WordPress Forms

Block invalid emails like temporary, disposable, etc. with our real-time email verification. Verify email address during form-fill and stop form spam.

Sparrow Email OTP Verification for Contact Form 7 vs Clearout Email Validator – Real-Time Email Verification on WordPress Forms