zerobounce

<p>Need an email validation tool to block invalid and high-risk emails on your WordPress website?</p>
<p>The ZeroBounce email verification plugin assists users by validating email addresses entered into your registration forms, comments sections, eCommerce shops, and more. Install the plugin, connect your API key, and select the forms you want to monitor with email validation.</p>
<h3>Key Features</h3>
<ul>
<li><strong>Automated real-time email validation</strong> – Automatically prevent selected email types from creating accounts, leaving comments, or signing up</li>
<li><strong>Detect more than 30+ email address types</strong> – Including invalid, abuse, disposable, spam trap, toxic domains, catch-all, and more</li>
<li><strong>Choose what to accept</strong> – Create your own rules for email validation and disallow emails based on status</li>
<li><strong>Email verification for 9 form types</strong> – Easily select which forms you want to protect with email validation</li>
<li><strong>Fast manual email validation</strong> – Verify any email address in the tools section using our interactive form</li>
<li><strong>Email validation API logs</strong> – Keep track of monthly email verifications, including status, sub-status, IP, date, and credits used</li>
</ul>
<h3>Benefits</h3>
<ul>
<li><strong>Keep your email list clean & accurate</strong></li>
<li><strong>Reduce your email bounce rate</strong></li>
<li><strong>Boost your inbox placement</strong></li>
<li><strong>Protect your email sender reputation</strong></li>
<li><strong>Improve email deliverability</strong></li>
<li><strong>Eliminate fraudulent, untrustworthy shoppers</strong></li>
<li><strong>Block spammers and spoofers</strong></li>
<li><strong>Keep your comments section clean</strong></li>
</ul>
<h3>Supported Forms/Plugins</h3>
<ul>
<li>Contact Form 7</li>
<li>WPForms</li>
<li>Ninja Forms</li>
<li>Formidable Forms</li>
<li>WooCommerce</li>
<li>WordPress Post Comments</li>
<li>WordPress Registration</li>
<li>MC4WP: Mailchimp for WordPress</li>
<li>Gravity Forms</li>
<li>Fluent Forms</li>
<li>WS Forms</li>
<li>Mailster Forms</li>
<li>Forminator Forms</li>
</ul>
<p>And more support is being added gradually.</p>


ZeroBounce Email Verification & Validation


I have tested this plugin on several of my personal and business websites, it's awesome. No more spam and fake signups. Service pricing is also decent. Recommended.


Excellent in blocking SPAM


You have a problem with NF form validation. It detects html fields that contains emails (eg mailto links) as email fields and validates those.



if (!empty($value) && is_string($value) && preg_match('/@.+\./', $value) && !str_contains($value, "\n") && !str_contains($value, '\n')) {// rest of the code}



Your approach needs to be changed to:



if (!empty($value) && is_string($value) && preg_match('/@.+\./', $value) && !preg_match('/mailto:/i', $value)) {  $ninjaForm = new Zerobounce_Email_Validator_Form_Public('ninjaforms', $form_data['id']);   // rest of the code}



This should be safer to validate only email addresses (or use a better regex).


Ninja Forms problem

ZeroBounce validates emails on your WordPress site in real-time, blocking invalid and risky emails to improve deliverability and reduce bounce rates.

dueclic

turboSMTP

<p>Validates email addresses using the turboSMTP API in:<br />
– WooCommerce registration and checkout<br />
– Contact Form 7<br />
– WpForms<br />
– WordPress comments and registration<br />
– MC4WP<br />
– Gravity Forms<br />
– Elementor Forms</p>
<p>The turboSMTP Email Validator for WordPress plugin ensures that email addresses provided during user registration and checkout are valid. It uses the turboSMTP API to perform the validation, enhancing the quality of email addresses collected and reducing the number of invalid emails in your database.</p>
<h3>Features</h3>
<ul>
<li>Validates email addresses in different forms (WooCommerce, CF7, WpForms, WordPress comments and registration, MC4WP, Gravity Forms, Elementor Forms)</li>
<li>Uses the turboSMTP API for email validation.</li>
<li>Stores validated email addresses in a custom database table.</li>
<li>Provides an admin settings page to configure API keys and enable/disable the service.</li>
<li>Displays a list of validated email addresses in the admin area.</li>
<li>Bypass validation for individual email addresses or entire domains using the whitelist functionality.</li>
</ul>
<h3>Usage</h3>
<ul>
<li>Enable turboSMTP Email Validator: Go to “Settings” > “turboSMTP Email Validator” and check the “Enable Email Validation” option.</li>
<li>Set API Keys: Enter your turboSMTP consumerKey and consumerSecret in the provided fields.</li>
<li>View Validated Emails: Check the list of validated emails in the “Validated Emails” section on the settings page.</li>
</ul>


turboSMTP Email Validator

Email validation tool in WordPress forms registrations using turboSMTP API

ZeroBounce Email Verification & Validation vs turboSMTP Email Validator