Email Validation API for Disposable & Risky Emails

Validate email addresses, detect disposable and burner emails, and verify domains using real DNS and MX record checks. Built for signup forms, SaaS platforms, ecommerce systems, and lead validation workflows.

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Test email validation, MX record checks, and disposable email detection directly from your browser.

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Code Examples

Simple REST API requests with JSON responses for fast backend integration.

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How This API Works

The Email Checker API validates email addresses by checking domain DNS records, verifying MX records, detecting disposable email providers, and analyzing common indicators associated with low-quality or temporary accounts.

Each request returns structured JSON data including normalized email formatting, mail server details, disposable-domain detection results, and validation status to help applications reduce spam, fake signups, and deliverability issues.

WyldAPI lightweight REST APIs

Who This API Is For

Built for developers, SaaS platforms, ecommerce systems, CRMs, marketplaces, and internal tools that need reliable email validation without maintaining custom DNS or disposable-domain detection infrastructure.

This API is a good fit if you need to:

Block disposable emails

Stop burner/disposable emails at signup or lead forms

Validate in a single call

DNS + MX checks plus disposable-domain detection

Normalize emails for cleaner data

Remove +tags to reduce dupes and improve matching

Protect deliverability and prevent abuse

Keep user data cleaner and reduce throwaway accounts

Common ways this API is used:

Signup and registration flows

Block disposable emails before account creation

Lead forms and CRM validation

Reduce fake submissions and improve lead quality before data enters your systems

List cleanup and audits

Internal tools that flag risky or invalid domains

Signup fraud prevention

Reduce abuse from temporary, burner, and disposable email accounts

This API is a good fit if you need to:

Common ways this API is used:

Block disposable emails

Stop burner/disposable emails at signup or lead forms

Signup and registration flows

Block disposable emails before account creation

Validate in a single call

DNS + MX checks plus disposable-domain detection

Lead forms and CRM validation

Reduce fake submissions and improve lead quality before data enters your systems

Normalize emails for cleaner data

Remove +tags to reduce dupes and improve matching

List cleanup and audits

Internal tools that flag risky or invalid domains

Protect deliverability and prevent abuse

Keep user data cleaner and reduce throwaway accounts

Signup fraud prevention

Reduce abuse from temporary, burner, and disposable email accounts

Now on WordPress.org

Use WyldAPI Right Inside WordPress!

Our official plugin, Wyld Registration Sentry, brings the Email Validation API straight to your WordPress registration forms! No code required.

Validate every signup against real DNS & MX checks and stop disposable, no-MX, and unwanted free-email accounts before they ever reach your user list.

What the plugin does:

Blocks bad domains

Rejects invalid, non-resolving, and no-MX-record email domains at signup.

Stops disposable emails

Detects and blocks burner and disposable email services automatically.

Free & TLD filters

Block free providers and registrations from spammy top-level domains.

Covers edits too

Validates email changes made from user profile updates.

Logs rejected attempts

Every blocked signup is logged in the admin area for review.

Fails open safely

Registrations continue temporarily if the validation service is unavailable.

Wyld Registration Sentry — validate WordPress registration emails through WyldAPI

Version1.0.0

WordPress6.0 or higher

Tested up to7.0.1

PHP version7.4 or higher

Last updatedJuly 9, 2026

Get it on WordPress.org

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Frequently Asked Questions

The Email Checker API validates email format, checks domain DNS records, verifies MX records, and detects disposable or burner email providers.

Yes. It can identify many disposable, temporary, and burner email domains so you can reduce fake signups, spam, and low-quality submissions.

Yes. The API checks MX records to help confirm whether the email domain is configured to receive mail.

The API returns structured JSON data with validation details, domain checks, MX information, disposable email detection, and normalized email output.

It is commonly used for signup forms, SaaS onboarding, ecommerce accounts, lead forms, CRM validation, fraud prevention, and list cleanup.

Email Checker API Frequently Asked Questions

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