Clearout Email Validator – Real Time Email Validation on WordPress Forms


Clearout Email Validation and email Verification plugin seamlessly integrates with all major forms to validate the email addresses in real-time. The plugin performs 20+ refined real-time validation checks to determine the current status of the email address. Such email validation checks include extensive verifications like grey-list verification, anti-spam check, gibberish check, catch-all verification, email blacklist verification & more. The real time validation will ensure the email address capture process to –

  • Accept only valid email addresses
  • Accept business/work email address only
  • Prevent all fraudulent signups from temporary/disposable/throw away email addresses
  • Block free email address providers like / /, in case you want to
  • Remind genuine users of their email if there are some typos.

This plugin requires an API token that can be obtained by creating a ‘Server’ App from Apps menu.
– Login into Clearout Account -> Click on ‘Apps’–> Click on ‘+ Create App’–> Choose ‘Server’ -> Provide the required details–>Click on Create and the API token will be generated.

If you do not have a Clearout account, please create an account with 100 FREE email validation credits! No Credit Card Required.

Supported Plugins

The Clearout email verification and validation 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

  • Fluent Form
  • Elementor Form
  • Contact Form
  • Gravity Forms
  • Mailster Form
  • WooCommerce
  • MailChimp
  • Ninja Forms
  • Formidable forms
  • Profile Builder
  • Ultimate Member registration form
  • Users Ultra registration form
  • JetPack comments and a contact form
  • MailPoet
  • Theme My Login
  • WP-Members
  • Paid Memberships Pro
  • WP Forms
  • Form Maker by 10Web
  • Visual Form Builder
  • Any WordPress registrations & contact forms
  • WS Form

Key Features

  • Fastest Real-time Email Validation
  • Guaranteed Deliverability (Safe to send)
  • Accurate Email Verification
  • High Precision Advanced Catch-all Resolver
  • Seamless API Integration
  • Anywhere on Any Device
  • Block Disposable Email
  • Email / Domain Allowlisting and Blocklisting
  • Block Role Email
  • Team Account Feature
  • Block Gibberish Email
  • Low Credit Notification Alert
  • Custom Error Message


Read more about Clearout email verification service


  • Clearout Email Validator setting page. Here you can add your Clearout API token and check/uncheck the role, disposable and Business email validator options.
  • Example - BWS Form denying free service email address.
  • Example - BWS Form denying invalid email address with custom error message.
  • Example - BWS Form denying invalid email address.
  • Example - BWS Form denying invalid email address with custom error message.
  • Example - Clearout Account page to generate API token.


Installation using WordPress dashboard

  1. Select Plugins -> Add New.
  2. Search for “Clearout Email Validator”.
  3. Click on Install Now to install the plugin.
  4. Click on Activate button to activate the plugin.
  5. Get your Clearout API token before start using the plugin.
  6. Configure the plugin settings, including your API key and check/uncheck the role, disposable and Business email validator.

Manual Installation

  1. Upload the plugin files to the /wp-content/plugins/clearout-email-validator directory.
  2. Activate the plugin through the ‘Plugins’ screen in WordPress
  3. Get your Clearout API token through here.
  4. Configure the plugin settings, including your API key and switch on or off the valid, disposable and free email validator.


How does this plugin work?

This Email Validation plugin listens to email address capture flow for all major forms by hooking WordPress is_email() function to verify whether the user typed email address can be accepted or not. Behind the screen, the verification will be carried out using Clearout API and the results will be matched with the appropriate settings allowed by the plugin.

Which Clearout status will be considered as a “valid” email address?

Clearout status other than “invalid” will be considered as “valid” email address and the form submission will be allowed. Also, by default, the email address of “disposable” or “role” will be considered as “invalid.” These settings can be changed in the plugin settings.

Does email validation stop all bad emails?

No, Clearout email validation cannot prevent bad emails from entering your system in the following conditions:
1. If email validation takes longer than the specified timeout value
2. If the status of email validation is returned as unknown

What version of WordPress is required?

This requires a minimum WordPress version of 4.6, tested and compatible with the latest version.

Why does “Select Forms” have only a few forms listed?

We strive to bring Clearout email validation support to all major WordPress forms, in case if you see your form is not listed let us know ( Alternative, you can try using Clearout JavaScript Widget to bring support of email validation to any form with little or no coding effort

What is an API token and where can I get it?

API token is a unique representation of your access to Clearout Email Validation Service.
The API token can be created or obtained by creating a ‘Server’ App from Apps menu.

How to generate an API token?

Once logged in to your Clearout account click on ‘Apps’–> Click on ‘+ Create App’–> Choose ‘Server’-> Provide the required details –> Click on Create and the API token will be generated.

What is a credit?

A credit represents the successful validation for a single email address. The trial account comes with 100 FREE credits. Additional credits can be purchased anytime and the credits will never expire.

Do you provide test email address?

Yes. For testing, you can find test email addresses to confirm that your integration works as intended without incurring credits.

What happens once the 100 free credits are exhausted?

You need to purchase additional credits. System will notify in advance when you are running out of credits (by default when below 50 credits)

What factors determine the high accuracy level claimed by Clearout email validation plugin?

Clearout WordPress Plugin performs more than 20 validation checks on each email address to provide 98%+ accuracy level. These rigorous validation checks have a wide scale ranging from role/free account check to disposable email verification, spam trap detection, email blacklist verification, gibberish check & a lot more.

How secure is my data?

Clearout is fully compliant with the EU’s GDPR. Data is highly secure with us, as we take security and confidentiality seriously. We know that the email lists are confidential and we do everything we can to make sure that they stay that way! Your data is never stored in our system for more than 30 days and if requested it can be removed immediately after processing. Once you finish using our system, all related to your account will be erased in a maximum of 30 days. Also, the information you share with us for payment purposes is encrypted and it is stored in a military grade secure system. We also go out of our way to protect your data and we developed advanced defence mechanisms against misuse, loss, unauthorised access, and improper disclosure. We want to provide the same security that we would want for ourselves. Our customers feel safe knowing that the best email verification service is also the most secure.

How long will it take to validate an email address?

Clearout has been rewarded to have the fastest TAT(Turnaround Time ). At times some domains might take more time than the expected. But major free domain like are verified in less than a half-a-second (less than 100 milliseconds)

How to buy more credits?

Buying credits in Clearout is a smooth experience by clicking on Buy Credits button on top-right

How to opt out of the Clearout Email checker on a specific form?

Clearout Email checker is enabled by default on all forms on the website. If it is necessary to skip validation on a given form, it must be handled as mentioned below.

  • Ninja Forms

    1. Ensure to enable Developer mode for your ninja form builder
    2. Open the form in Form editor that does not require the Clearout Email Validation
    3. Open the Email field setting and under ADMINISTRATION option enter the key value prefixed with ‘clearout_skip_validation’ for the field key and save the changes
  • Formidable / WP Form

    1. Open the form in Form editor that does not require the Clearout Email Validation
    2. Add a new hidden field and in Options Advanced settings, enter the default value prefixed with ‘clearout_skip_validation’ and save the changes.
  • Elementor forms

    1. Open the form in Form editor that does not require the Clearout Email Validation
    2. In the Fields’s Advanced settings, enter the ID value prefixed with ‘clearout_skip_validation’ and save the changes.

Do you support form specific custom validation?

Yes, we do support form specific custom validation through Clearout JavaScript Widget, the integration is simple and can be done without need of developer help. Clearout JS widget provides all bells and whistles to customise the email validation as per your need.

Looking for custom integration of this plugin?

Send us email to or say “Hello” in chat

Where can I report bugs?

Send us email to or say “Hello” in chat


Julie 21, 2022
I highly recommend using this plugin if you are collecting leads via any of the WordPress forms. You might need to go for a paid upgrade as the free trial gives you 100 credits alone. But if you really wanna avoid spam, invalid and disposable leads, then this is the tool. A Thumbs Up!
Julie 11, 2022
We were getting a lot of spam leads, especially a lot many disposable emails while running the content marketing campaign for the Ebook downloads, we were providing to different segments of users. I used the Clearout Email verification plugin to fix this and it really helped to resolve this bad data flow issue. We have only quality lead flow into our crm now. Thanks for being a savior team.
Junie 23, 2022
I have been using this plugin for a while now and it helped me with filtering the email addresses on the contact forms. The real time Email verification plugin by Clearout- does not allow the users to enter invalid or bad emails. We were really worried about spam and incorrect email addresses coming into our database through the contact forms, but, Clearout's Email verification plugin has helped us immensely to allow only the genuine emails to enter into our system.
Mei 1, 2022
The Wordpress plugin is for email validation at the point of capture for my forms and I must say it serves the purpose pretty well. It does what it does. Keep away all invalid & fake email addresses. MY CRM looks pretty clean now after using this plugin for 6months now. Keep up the good work.
April 4, 2022
Really useful plugin in preventing the users from submitting the forms using invalid, disposable & fraudulent emails. I am really happy with the tool functionality and support
Maart 29, 2022
I have been using the plugin for a few months now & I must say that the accuracy is fantastic. They are able to resolve disposable & invalid email addresses with a very good accuracy. I'm really impressed & looking forward to using them for all my lead capture campaigns. This helps me avoid the problem of fixing bounce rates at a later stage as I allow only quality leads to enter into my crm. Excellent Support is an added bonus.
Read all 25 reviews

Contributors & Developers

“Clearout Email Validator – Real Time Email Validation on WordPress Forms” is oopbron sagteware. Die volgende mense het bygedra tot die ontwikkeling van hierdie uitbreiding:




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  • WPForm incompatable Fixes


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  • Added Support for Mailster Form and WooCommerce Checkout form


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  • Supported WordPress version 5.7.2


  • Warning fix
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