NoParam

NoParam Email Validation & Anti-Spam Prevention is a powerful plugin designed to ensure that your website’s email list is clean, legitimate, and free from spam. By integrating advanced email verification technology and spam prevention features, this plugin helps you protect your email sender reputation, improve deliverability, and engage with real users. Keep your site free of fake or disposable email addresses and safeguard your communications from spam and invalid sign-ups.
<h3>Features</h3>
<ul>
<li>Real-time email validation – Ensures only valid, legitimate emails are submitted. </li>
<li>Smart Email Suggestions – Detects and suggests corrections for common typos (e.g., “gmal.com” → “gmail.com”). </li>
<li>Spam Prevention & Fake Email Blocking: Safeguards your site from disposable, role-based, or temporary emails.</li>
<li>Improves Email Deliverability: Helps protect your sender reputation and ensures higher inbox placement.</li>
<li>Privacy-focused: No tracking, no storing, no reselling </li>
<li>Easy API integration for developers</li>
</ul>
<h3>Supported Forms</h3>
<ul>
<li>Contact Form 7 </li>
<li>WPForms </li>
<li>WordPress Registration Page </li>
<li>WordPress Post Comments </li>
<li>More integrations coming soon!</li>
</ul>
<a href="https://noparam.com" rel="nofollow ugc">Get your API key for Free</a>
<h3>External services</h3>
This plugin connects to NoParam’s email validation API to check the validity of email addresses submitted through forms.
NoParam’s Email Validation API uses advanced algorithms to detect fake, disposable, and temporary emails, ensuring the highest level of accuracy and reducing the chances of spam or bounce-back emails.
<ul>
<li>Service Used: NoParam Email Validation API – <a href="https://noparam.com" rel="nofollow ugc">Free Email Checker</a></li>
<li>Data Sent: The plugin sends email addresses entered in form fields to the NoParam API for validation. </li>
<li>Why: This is required to determine whether an email address is valid, invalid, or risky. </li>
<li>When: This occurs when users submit forms that are configured to use the validation service. </li>
<li>Privacy & Terms:
<ul>
<li><a href="https://noparam.com/privacy" rel="nofollow ugc">Privacy Policy</a> </li>
<li><a href="https://noparam.com/terms" rel="nofollow ugc">Terms of Service</a> </li>
</ul>
</li>
<li>Documentation:
<ul>
<li><a href="https://docs.noparam.com" rel="nofollow ugc">API Docs</a></li>
</ul>
</li>
</ul>

NoParam Email Validation – Email Verification & Anti-Spam Prevention

NoParam offers real-time email validation for WordPress to prevent fake signups and spam, improving email deliverability.

zerobounce

Need an email validation tool to block invalid and high-risk emails on your WordPress website?
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.
<h3>Key Features</h3>
<ul>
<li>Automated real-time email validation – Automatically prevent selected email types from creating accounts, leaving comments, or signing up</li>
<li>Detect more than 30+ email address types – Including invalid, abuse, disposable, spam trap, toxic domains, catch-all, and more</li>
<li>Choose what to accept – Create your own rules for email validation and disallow emails based on status</li>
<li>Email verification for 9 form types – Easily select which forms you want to protect with email validation</li>
<li>Fast manual email validation – Verify any email address in the tools section using our interactive form</li>
<li>Email validation API logs – Keep track of monthly email verifications, including status, sub-status, IP, date, and credits used</li>
</ul>
<h3>Benefits</h3>
<ul>
<li>Keep your email list clean & accurate</li>
<li>Reduce your email bounce rate</li>
<li>Boost your inbox placement</li>
<li>Protect your email sender reputation</li>
<li>Improve email deliverability</li>
<li>Eliminate fraudulent, untrustworthy shoppers</li>
<li>Block spammers and spoofers</li>
<li>Keep your comments section clean</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>
And more support is being added gradually.

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.

NoParam Email Validation – Email Verification & Anti-Spam Prevention vs ZeroBounce Email Verification & Validation