BillionVerify Email Validator
Real-time email verification for your WordPress forms. Block invalid, disposable, catch-all and role addresses using the BillionVerify API.
Use with caution
BillionVerify Email Validator works, but test it on a staging site before relying on it in 2026. Was last updated 4 months ago, and scores 49/100 on our health check.
- Small user base (<10 active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where BillionVerify Email Validat… stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| email validator | #39 |
| email verifier | #17 |
| form validation | >100 |
| spam protection | >100 |
| User Registration | >100 |
About BillionVerify Email Validator
From the official readme · v1.0.3Description
BillionVerify Email Validator checks email addresses in real time as your forms are submitted, stopping fake, mistyped, disposable and undeliverable emails before they reach your database. Cleaner signups mean fewer bounces, less spam and healthier email campaigns.
The plugin verifies each address against the BillionVerify API — performing syntax, MX and SMTP mailbox checks — and rejects the submission when the address matches a status you have chosen to block.
Key features
- Real-time verification during form submission (no front-end changes required).
- Detects valid, invalid, disposable, catch-all, role and risky addresses.
- Choose exactly which statuses block a submission — invalid only by default.
- Custom error message shown to visitors.
- Built-in connection test and single-email test tool in the admin.
- Result caching to save credits on repeated addresses.
- Fail-open by default: if the API is unreachable or credits run out, forms keep working.
Supported forms
- Default WordPress registration form (including multisite signup)
- WordPress comment form
- WordPress lost-password form
- WooCommerce checkout and account registration
- Contact Form 7
- WPForms
- Gravity Forms
- Elementor Pro Forms
- Fluent Forms
Third-Party Service Usage
This plugin sends email addresses to the BillionVerify API (https://billionverify.com/) for verification. Through API calls to BillionVerify servers it verifies email addresses and retrieves account credit information, using the following endpoints:
- Verify an email address: https://api.billionverify.com/v1/verify/single
- Retrieve credit balance: https://api.billionverify.com/v1/credits
By installing and activating this plugin, you consent to the transmission of submitted email addresses to these URLs for the purpose of verification. Use of the BillionVerify service is subject to BillionVerify’s Terms of Service (https://billionverify.com/terms) and Privacy Policy (https://billionverify.com/privacy).
Installation
- Upload the plugin files to
/wp-content/plugins/billionverify-email-validator, or install through the WordPress plugins screen. - Activate the plugin through the ‘Plugins’ screen in WordPress.
- Go to Settings → BillionVerify.
- Enter your BillionVerify API key and click “Test connection”.
- Choose which statuses to block and which forms to protect.
- Use the “Test an Email” tool to confirm everything works.
Frequently asked questions
How does it work?
When a visitor submits a protected form, the plugin sends the email address to the BillionVerify API. If the address matches a status you chose to block (for example “invalid” or “disposable”), the submission is rejected and the visitor is asked to use a different email. No email is sent to the address during verification.
What happens if my account runs out of credits?
By default the plugin “fails open”: if verification cannot be completed, the email is accepted and your forms keep working as if the plugin were not installed. You can switch this to “fail closed” in the settings.
Does it consume a credit on every submission?
Each unique address is verified once and cached for the lifetime you configure, so repeated submissions of the same address do not spend extra credits. The “unknown” status is never charged by BillionVerify.
Do I need to modify my existing forms?
No. Enable the integrations you want in Settings → BillionVerify and the plugin hooks into those forms automatically.
Changelog
1.0.3
- Updated “Tested up to” to WordPress 7.0 (the current release).
1.0.2
- Removed the pending “billionverify” account from the contributors list (will be re-added once the WordPress.org brand account is approved).
- Updated “Tested up to” to WordPress 6.7.
1.0.1
- Added ikbear to the contributors list.
1.0.0
- Initial release.
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
Best BillionVerify Email Validator alternatives
All email validator plugins →
FAQ
BillionVerify Email Validator: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 5, 2026
Is BillionVerify Email Validator free?
Yes. BillionVerify Email Validator is free to download and use from the official WordPress.org plugin directory.
Is BillionVerify Email Validator safe to use in 2026?
BillionVerify Email Validator works, but test it on a staging site before relying on it in 2026. Was last updated 4 months ago, and scores 49/100 on our health check.
How many websites use BillionVerify Email Validator?
BillionVerify Email Validator is active on <10 WordPress websites and has been downloaded 770 times since it launched in May 2026. It was downloaded 165 times in the last 30 days.
Does BillionVerify Email Validator work with WordPress 7.1?
BillionVerify Email Validator is officially tested up to WordPress 7.0.6, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does BillionVerify Email Validator need?
BillionVerify Email Validator requires PHP 7.0 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was BillionVerify Email Validator last updated?
The latest version, 1.0.3, was released on May 29, 2026 (4 months ago).
Who makes BillionVerify Email Validator?
BillionVerify Email Validator is developed and maintained by Ikbear.
What are the best alternatives to BillionVerify Email Validator?
The most popular alternatives to BillionVerify Email Validator are Antideo Email Validator (800+ installs), Reoon Email Verifier (600+ installs) and Email Validator for Contact… (400+ installs).
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