Title: Clearout Email Validator – Real-Time Email Verification on WordPress Forms Author: clearoutio Published: October 24, 2019 Last modified: February 18, 2026 --- Search plugins ![](https://ps.w.org/clearout-email-validator/assets/banner-772x250.png?rev=3177739) ![](https://ps.w.org/clearout-email-validator/assets/icon-256x256.png?rev=2179096) # Clearout Email Validator – Real-Time Email Verification on WordPress Forms By [clearoutio](https://profiles.wordpress.org/clearoutio/) [Download](https://downloads.wordpress.org/plugin/clearout-email-validator.3.3.1.zip) * [Details](https://pcd.wordpress.org/plugins/clearout-email-validator/#description) * [Reviews](https://pcd.wordpress.org/plugins/clearout-email-validator/#reviews) * [Installation](https://pcd.wordpress.org/plugins/clearout-email-validator/#installation) * [Development](https://pcd.wordpress.org/plugins/clearout-email-validator/#developers) [Support](https://wordpress.org/support/plugin/clearout-email-validator/) ## Description Clearout Email Validation 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. 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. #### Key Benefits of Using Clearout Email Verification Plugin: * Accept only **safe-to-send** email address to **protect your sender reputation** * Accept only **business or work email addresses** * **Prevent fraudulent signups or leads getting into CRM** by stopping [temporary / disposable / throw away email addresses](https://clearout.io/blog/2020/09/30/dont-let-your-email-campaigns-be-a-victim-of-disposable-email-addresses) * **Customization to Block free email address providers** like gmail.com / yahoo. com / hotmail.com * **Remove** duplicate and **alias email addresses** #### How to Install Clearout Email Verifier Plugin **Obtain an API Token:** 1. **Log in** to your Clearout account. 2. Navigate to the [‘Developer’](https://app.clearout.io/developer/api/list) menu and click on **‘ + Create API Token’**. 3. Add the necessary details for reference, and click on “ Create” to generate the API token. **Create a Clearout Account (if you don’t have one):** 1. [Sign up](https://app.clearout.io/register) for a Clearout account to **get 100 free email validation credits with no credit card required**. For more detailed instructions, visit Clearout [Email Verifier Plugin Installation](https://clearout.io/integrations/wordpress/). #### Supported Forms/Plugins 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: * Elementor Form * Gravity Forms * Forminator Form * WooCommerce Checkout Forms * WooCommerce Registration Form * Fluent Form * WP Forms * Formidable forms * WS Form * WP-Members * Contact Form * Mailster Form * MailChimp * Ninja Forms * Profile Builder * Ultimate Member registration form * Users Ultra registration form * JetPack comments and a contact form * MailPoet * Theme My Login * Paid Memberships Pro * Form Maker by 10Web * Visual Form Builder * Any WordPress registrations & contact forms #### Key Features * Accurate Email Verification * Fastest Real-time Email Validation * Seamless API Integration * Guaranteed Deliverability (Safe to send) * High Precision Advanced Catch-all Resolver * Block Role Email * Block Disposable Email * Block Gibberish Email * Email / Domain Allowlisting and Blocklisting * Custom Error Message * Limit email validation to only required pages * Low Credit Notification Alert * Team Accounts * Syntax Verification * [Test email addresses](https://docs.clearout.io/api-overview.html#testing) #### Know A Little More About Clearout Email Verification Service 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. #### FURTHER READING More about Clearout Email Verification * [https://clearout.io/email-verification-api/](https://clearout.io/email-verification-api/) * [https://clearout.io/disposable-email-checker/](https://clearout.io/disposable-email-checker/) * [https://clearout.io/integrations/](https://clearout.io/integrations/) * [https://clearout.io/help/](https://clearout.io/help/) * [https://docs.clearout.io/](https://docs.clearout.io/) Other Clearout Services * [https://clearout.io/email-finder/](https://clearout.io/email-finder/) * [https://clearout.io/sales-prospecting/chrome-extension/](https://clearout.io/sales-prospecting/chrome-extension/) * [https://clearout.io/sales-prospecting/advanced-data-enrichment/](https://clearout.io/sales-prospecting/advanced-data-enrichment/) * [https://clearout.io/reverse-lookup/linkedin/](https://clearout.io/reverse-lookup/linkedin/) * [https://clearout.io/reverse-lookup/email/](https://clearout.io/reverse-lookup/email/) ## Screenshots * [[ * 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 addresses with a custom error message. * [[ * Example – BWS Form denying invalid email address. * [[ * Example – BWS Form denying invalid email addresses with a custom error message. * [[ * Example – Clearout Account page to generate API token. ## Installation ### 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](https://app.clearout.io/developer/api/list) 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](https://app.clearout.io/developer/api/list). 4. Configure the plugin settings, including your API key, and switch on or off the valid, disposable, and free email validator. ## FAQ ### What is real-time email verification? Real-time email verification refers to the process of confirming the authenticity or existence of an email address account in real time. Its results are based on real-time analysis rather than on basic checks against the old & existing databases. ### 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’s 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 (us@clearout.io). Alternatively, you can try using [Clearout Form Guard](https://docs.clearout.io/formguard/v3/index.html) 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? The API token is a unique representation of your access to Clearout Email Validation Service. The API token can be created or obtained by ‘+ Create API Token’ from the Developer menu. ### How to generate an API token? Once logged in to your Clearout account click on ‘Developer’–> Click on ‘+ Create API Token’–> Provide the required details –> Click on Create and the API token will be generated. ### What is a credit? A credit represents the successful validation of 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](https://docs.clearout.io/api-overview.html#testing) 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](https://app.clearout.io/settings/notifications) (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 99% 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 email verifier is GDPR compliant. Data is highly secure since we take security and confidentiality seriously. At default, your processed data is retained in our system for 30 days, and it can be erased immediately if requested. In addition, all financial information is encrypted and maintained in a military-grade secure system. ### How long will it take to validate an email address? Clearout email verifier has been rewarded to have the fastest TAT(Turnaround Time). Some domains might take longer time than expected. But free domains like gmail.com are verified in less than a half-a-second (less than 100 milliseconds) ### How to buy more credits? Buy the desired number of email verifier credits in a few clicks by clicking on [Buy Credits](https://app.clearout.io/account/pricing) from your account. ### 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](https://ninjaforms.com/docs/developer-mode/) for your ninja form builder 2. Open the form in the Form editor that does not require the Clearout Email Validation 3. Open the Email field setting and under the 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 the 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 the 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. * Forminator forms 1. Open the form in the Form editor that does not require the Clearout Email Validation 2. Add a new hidden field and enter the value as ‘clearout_skip_validation’ and save the changes. ### Do you support page or form-specific custom validation? Yes, add the page URL that hosts the form in the ‘Add Form Page URLs’ to limit validation to page-specific or to limit form-specific custom validation through [Clearout Form Guard](https://docs.clearout.io/formguard/v3/index.html), the integration is simple and can be done without need of developer help. Clearout Form Guard provides all the bells and whistles to customize the email validation as per your need. ### Looking for custom integration of this plugin? Send us an email at us@clearout.io or say “Hello” in the chat ### Where can I report bugs? Send us an email at us@clearout.io or say “Hello” in the chat ## Reviews ![](https://secure.gravatar.com/avatar/5986ddc61f5616ea102120e2bb90f4c5cb8b00e0dd3c3c362d00390596d3a6db? s=60&d=retro&r=g) ### 󠀁[Amazing Tool – Highly Recommended](https://wordpress.org/support/topic/amazing-tool-highly-recommended/)󠁿 [lorinom](https://profiles.wordpress.org/lorinom/) February 13, 2026 I’ve been using this tool now for several weeks and have found it to be immensely helpful for my business. Just as important, when I reached out to customer service they were responsive and extremely supportive of my needs. I could not recommend this software more highly. ![](https://secure.gravatar.com/avatar/2df87619a3530487a088f0caced8fd1d995c848f1216e16efdd8f95fb98f76a0? s=60&d=retro&r=g) ### 󠀁[Super plugin](https://wordpress.org/support/topic/super-plugin-1323/)󠁿 [alturavela](https://profiles.wordpress.org/alturavela/) May 29, 2025 Works very well! Great ![](https://secure.gravatar.com/avatar/9cb00d8491cae73593eca24a6dab99614cd3134785107fae5e740048b47239cd? s=60&d=retro&r=g) ### 󠀁[Unmatched Tech Support That Goes Above and Beyond](https://wordpress.org/support/topic/unmatched-tech-support-that-goes-above-and-beyond/)󠁿 [nocturnal009](https://profiles.wordpress.org/nocturnal009/) February 13, 2025 I recently had the pleasure of interacting with the tech support team for this WordPress plugin, and I couldn’t be more impressed. They were prompt, professional, and extremely knowledgeable. Every query I had was addressed with patience and clarity, making the whole experience stress-free. The team went above and beyond to ensure my issues were resolved swiftly, and their guidance made a significant difference in optimizing my website. I highly recommend this plugin not only for its email verification and security features but also for the stellar support that comes with it! ![](https://secure.gravatar.com/avatar/dad2cf4c92ecb7ef699c9c9767531b8422752ed55d6f9376730f3a1d175c37de? s=60&d=retro&r=g) ### 󠀁[Nice plugin and good team](https://wordpress.org/support/topic/nice-plugin-and-good-team/)󠁿 [Akehl](https://profiles.wordpress.org/akehl/) October 29, 2024 II have been using ClearOut for 5 years primarily to validate emails on my WordPress site through their plugin and for bulk email validation. Recently, I encountered a bug. A good way to assess a plugin’s reliability is by reviewing its support services, and ClearOut’s support has been effective. They accurately identified the bug and assigned me an engineer (rather than an assistant who provides basic troubleshooting steps). The issue was resolved promptly. ![](https://secure.gravatar.com/avatar/0e8dc2891499fb756f65cc8dbcbd57ba80d86cafc531ee6f00e9ff53ed796538? s=60&d=retro&r=g) ### 󠀁[Nice integration, but lacks a critical feature](https://wordpress.org/support/topic/nice-integration-but-lacks-a-critical-feature/)󠁿 [Shall](https://profiles.wordpress.org/taven1gmailcom/) September 4, 2024 I’ve been using Clearout on my Wordpress/Woocommerce site for over a year and it has mostly been transparent in validating emails. However, I recently had a situation where a repeat customer opened a support ticket with us and they could not place an order. Their email was being returned as “gibberish” by Clearout even though it had previously worked fine. I checked the log in Clearout and found this as well. While the plugin is working as expected, there should be a feature to skip email validation for users/emails that have a role within Wordpress. For example, my customers have a role of “Customer”. The only way I found to allow this customer to place an order was to add them to the white list in Clearout. Had the customer not reached out via a support ticket, I would have never known. Hopefully, this can be added as it would reduce the number of validations needed and prevent customer frustration. ![](https://secure.gravatar.com/avatar/3863f5e88d3a6d9d0b8974256321c5a38a19bd968f0ec356d1e10628d95811e2? s=60&d=retro&r=g) ### 󠀁[Great work](https://wordpress.org/support/topic/great-work-1130/)󠁿 [krisseeuw](https://profiles.wordpress.org/krisseeuw/) June 17, 2024 Using the plug-in for several years now, on multiple websites. It works great and helps to avoid spammers and create better contacts. Our situation is as follows: We use a freemium model for some digital products and also provide free helpful sites. We only request to provide a name and e-mail to send the download link to. There was quite some abuse, until I started to use ClearOut Email Validator. [ Read all 13 reviews ](https://wordpress.org/support/plugin/clearout-email-validator/reviews/) ## Contributors & Developers “Clearout Email Validator – Real-Time Email Verification on WordPress Forms” is open source software. The following people have contributed to this plugin. Contributors * [ clearoutio ](https://profiles.wordpress.org/clearoutio/) “Clearout Email Validator – Real-Time Email Verification on WordPress Forms” has been translated into 2 locales. Thank you to [the translators](https://translate.wordpress.org/projects/wp-plugins/clearout-email-validator/contributors) for their contributions. [Translate “Clearout Email Validator – Real-Time Email Verification on WordPress Forms” into your language.](https://translate.wordpress.org/projects/wp-plugins/clearout-email-validator) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/clearout-email-validator/), check out the [SVN repository](https://plugins.svn.wordpress.org/clearout-email-validator/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/clearout-email-validator/) by [RSS](https://plugins.trac.wordpress.org/log/clearout-email-validator/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.0.0 * Initial Release #### 1.0.1 * Content and Banner Changed #### 1.0.2 * Description Changed #### 1.1.0 * Major Bug Fixes and performance increased #### 1.1.1 * Major Bug Fixes and Performance Improvement #### 1.1.2 * Minor Bug Fixes #### 1.1.3 * Minor Bug Fixes #### 1.1.4 * Performance Improvements. #### 1.1.5 * Performance Improvements. #### 1.1.6 * WPForm incompatible Fixes #### 1.1.7 * Minor Bug Fixes #### 1.1.8 * Bug Fixes #### 1.2.0 * Performance Improvements & Bug Fixes #### 1.3.0 * UI and Particular forms select changes #### 1.3.1 * Added Support for Mailster Form and WooCommerce Checkout form #### 1.3.2 * Minor Changes #### 1.3.3 * Performance Improvements #### 1.3.4 * Minor Changes #### 1.4.0 * Support PM Pro form #### 1.5.0 * Support Elementor form #### 1.5.1 * Minor Changes #### 1.5.2 * Minor Changes #### 1.5.3 * Minor Changes #### 1.6.0 * Added Support for Fluent Form #### 1.6.1 * Minor Changes #### 1.6.2 * Minor Changes #### 1.6.3 * Minor Changes #### 1.6.4 * Supported WordPress version 5.7.2 #### 1.6.5 * Warning fix * Added Gibberish support #### 1.6.6 * Minor Changes #### 1.7.0 * Added support for WS Forms #### 1.7.1 * Minor Changes #### 1.7.2 * Minor Fixes #### 1.7.3 * Minor Bug Fixes #### 1.7.4 * Minor Enhancements #### 1.7.5 * Custom Invalid Error Message #### 1.7.6 * Minor Changes #### 1.7.7 * Minor Fixes #### 1.7.8 * Minor Optimisations #### 1.7.9 * Minor Fixes #### 1.7.10 * Minor Improvements #### 1.7.11 * Support of form specific validation #### 1.7.12 * Minor Fixes #### 2.0.0 * Major Fixes and Woocommerce form improvements #### 2.0.1 * Minor Fixes #### 2.0.2 * Minor Fixes and updated Readme #### 2.0.3 * Minor Fixes and error handling #### 2.0.4 * Minor Fixes and added strict mode #### 2.1.0 * Added Support for Forminator Forms and Filter Urls #### 2.1.1 * Optimised and improved Filter Urls #### 3.0.0 * Security Fixes and Code Optimisations #### 3.0.1 * Minor Fixes #### 3.0.2 * Minor Fixes #### 3.0.3 * Gravity Form Fixes #### 3.0.4 * By default, is_email option is disabled #### 3.1.0 * Exclusion URL Support #### 3.1.1 * Minor Fixes #### 3.1.2 * Compatibility Fixes #### 3.1.3 * Inclusion & Exclusion url improvements #### 3.1.4 * Minor Changes #### 3.1.5 * Minor Optimizations * Added safe to send option #### 3.1.6 * Minor Fixes #### 3.1.7 * Improved WooCommerce hooks #### 3.2.0 * Introduced WooCommerce Signup Form support #### 3.2.1 * Minor Security Fixes #### 3.2.2 * Minor Changes #### 3.2.3 * Minor Fixes #### 3.2.4 * Minor Fixes #### 3.2.5 * Minor Improvements #### 3.3.0 * Introduced blocking unknown email support #### 3.3.1 * Minor Fix ## Meta * Version **3.3.1** * Last updated **2 months ago** * Active installations **600+** * WordPress version ** 4.6 or higher ** * Tested up to **6.9.4** * Languages * [Dutch](https://nl.wordpress.org/plugins/clearout-email-validator/), [English (US)](https://wordpress.org/plugins/clearout-email-validator/), and [Ukrainian](https://uk.wordpress.org/plugins/clearout-email-validator/). * [Translate into your language](https://translate.wordpress.org/projects/wp-plugins/clearout-email-validator) * Tags * [email checker](https://pcd.wordpress.org/plugins/tags/email-checker/)[email validation](https://pcd.wordpress.org/plugins/tags/email-validation/) [email verification](https://pcd.wordpress.org/plugins/tags/email-verification/) [email verifier](https://pcd.wordpress.org/plugins/tags/email-verifier/)[woocommerce](https://pcd.wordpress.org/plugins/tags/woocommerce/) * [Advanced View](https://pcd.wordpress.org/plugins/clearout-email-validator/advanced/) ## Ratings 4.2 out of 5 stars. * [ 9 5-star reviews ](https://wordpress.org/support/plugin/clearout-email-validator/reviews/?filter=5) * [ 1 4-star review ](https://wordpress.org/support/plugin/clearout-email-validator/reviews/?filter=4) * [ 1 3-star review ](https://wordpress.org/support/plugin/clearout-email-validator/reviews/?filter=3) * [ 0 2-star reviews ](https://wordpress.org/support/plugin/clearout-email-validator/reviews/?filter=2) * [ 2 1-star reviews ](https://wordpress.org/support/plugin/clearout-email-validator/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/clearout-email-validator/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/clearout-email-validator/reviews/) ## Contributors * [ clearoutio ](https://profiles.wordpress.org/clearoutio/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/clearout-email-validator/) ## Donate Would you like to support the advancement of this plugin? [ Donate to this plugin ](https://Clearout.io)