Email validation API

Reduce email bounce rates and improve data quality

Check and correct data at capture   Real time validation   Delivered as a web service

Email validation that ticks all the boxes

Deliverability check

Check whether an email address is capable of receiving email.

No spam email

Our service performs a check without actually sending an email.

Real-time analysis

Validation uses actual mail server information rather than cached details.

Catch-all domain test

Check for domains that will accept an email address if it doesn’t exist.

Disposable email detection

Identify email addresses associated with disposable email providers.

Correct common mistakes

Suggest alternatives for common mistakes such as @gamil.com or @yahhooo.com.



Try the demo

See how it works with any email address



Use email validation across your business

Checkout and sign-up forms

Capture email addresses from your customers which you can rely on later and reduce spam or fraudulent sign-ups.

CRMs and office apps

Minimise typos by checking emails as they’re entered into your system.

Email marketing

Reduce hard bounce-backs to help maintain your reputation with mailers.

EPOS and returns

Make the returns process easy and efficient with email validation.


Use PostCoder Web across your business

A simple API for developers

Sign up for an API key and get free lookups to try

Cross platform email validation using the PostCoder Web API

Easy to integrate examples
Secure HTTPS requests
Reporting tools and usage alerts
30ms average response time
>99.99% uptime
Enterprise SLA available

API documentation
Get your API key


8,000 businesses already trust us

“2x faster checkout times - PostCoder Web has literally transformed our checkout process”

- Zak Edwards, Founder of Prezzybox

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