Products
Email Verification Tools & Validation Services
From real-time API verification to bulk list cleaning, Mailchk has the tools to keep your email data clean, your sender reputation protected, and your forms fraud-free.
Test any email instantly
Our Products
Email Validation API, Widget, and List Validation
Whether you need real-time validation, form protection, or list cleaning — we have you covered.
Email Validation API
Real-time email verification via REST API. Validate emails in under 50ms with syntax checks, MX lookups, disposable detection, and risk scoring.
Explore APIForm Guard
Drop-in JavaScript widget that validates emails directly in your forms. Zero backend required — just add a script tag.
Explore Form GuardPlugins & SDKs
Native integrations for WordPress, React, Angular, Vue, and more. Install and start validating in minutes.
View PluginsEmail List Validation
Upload CSV files and clean your entire email list. Get detailed reports with risk scores, disposable flags, and export options.
Explore List ValidationInbox Placement Testing
Send a test email and see exactly where it lands — Primary, Promotions, or Spam. Test across Gmail, Outlook, Yahoo, and more.
Explore Inbox PlacementEmail Testing
Create disposable test inboxes to capture and inspect every email your app sends — HTML, headers, attachments, and plain text.
Explore Email TestingSMS Testing
Provision test phone numbers and verify SMS delivery in your CI/CD pipeline. Extract OTP codes and check message content automatically.
Explore SMS TestingEmail Watchdog
Always-on email monitoring. Detect when your templates change, links break, or images die — before your customers notice.
Explore Email WatchdogHow It Works
How Does Email Validation Work?
Mailchk uses a multi-layer filtering protocol, with every single email going through the following testing and cleaning steps.
Syntax and format validation
DNS validation, including MX record lookup
Disposable and temporary email detection
Domain typo detection with "did you mean" suggestions
Free email provider detection
Role-based account detection (info@, admin@, etc.)
Suspicious pattern analysis and risk scoring
GET /v1/check?email=test@tempmail.com
{
"email": "test@tempmail.com",
"domain": "tempmail.com",
"valid": false,
"disposable": true,
"mx_exists": true,
"free_email": false,
"did_you_mean": "",
"risk_score": "critical",
"risk_factors": [
"disposable_domain"
],
"reason": "Disposable email domain",
"mx_records": [
{
"priority": 10,
"exchange": "mx.tempmail.com"
}
]
}Integrations
Integrate Email Verification With Any Platform
Easily connect with Mailchk using our clean, intuitive, multi-platform API for effortless integration and seamless workflows.
JavaScript
Python
PHP
Ruby
Node.js
Go
Java
C#
React
Vue
Angular
WordPress
Zapier
HubSpot
Salesforce
Mailchimp
Don't just take our word for it
See why teams rely on Mailchk to keep their email lists clean
"Mailchk reduced our fake signups by 89%. The API is incredibly fast and the documentation is excellent."
Noel S
CTO, MyBrands Group
"We integrated Mailchk in under an hour. It catches disposable emails that other services miss."
Stephen M
Lead Developer, TRTCompare
"Finally, a solution that actually works. Our email deliverability improved by 40% after implementing Mailchk."
Michael G
Product Manager, Evernu
"The real-time validation is a game changer. No more wasted resources on fake accounts."
Joe S
Founder, Moojority
"Mailchk handles our 100k+ daily validations without breaking a sweat. Incredible performance."
Katie E
DevOps Lead, CVS
"Switched from a competitor and never looked back. Better accuracy, better pricing, better support."
Brendan O
Tech Lead, CardGenr
"Mailchk reduced our fake signups by 89%. The API is incredibly fast and the documentation is excellent."
Noel S
CTO, MyBrands Group
"We integrated Mailchk in under an hour. It catches disposable emails that other services miss."
Stephen M
Lead Developer, TRTCompare
"Finally, a solution that actually works. Our email deliverability improved by 40% after implementing Mailchk."
Michael G
Product Manager, Evernu
"The real-time validation is a game changer. No more wasted resources on fake accounts."
Joe S
Founder, Moojority
"Mailchk handles our 100k+ daily validations without breaking a sweat. Incredible performance."
Katie E
DevOps Lead, CVS
"Switched from a competitor and never looked back. Better accuracy, better pricing, better support."
Brendan O
Tech Lead, CardGenr
Start Validating Emails for Free
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