# Email Address Verification and Validation API | FastKYC

> Verify an email address is legitimate and deliverable, filtering out disposable, invalid and undeliverable addresses before they enter your database.

Source: https://www.fastkyc.com/apis/email-check/

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[Identity APIs](/apis/identity/)

# Email Check API

Verify an email address is legitimate and deliverable, filtering out disposable, invalid and undeliverable addresses before they enter your database.

[Book a Demo](/book-demo/)

Category

[Identity APIs](/apis/identity/)

Built for

-   [Fintech & Payments](/industries/fintech-payments/)
-   [Gaming & Fantasy Sports](/industries/gaming/)
-   [Crypto & Web3](/industries/crypto/)
-   [Staffing & HR](/industries/staffing-hr/)
-   [Telecom](/industries/telecom/)

## What the Email Check API does

Email Check tests whether an email address is genuine and able to receive mail, identifying invalid, undeliverable and disposable addresses.

Catching this at the point of entry prevents a compounding problem. An address that never receives your verification mail leaves the customer stuck and your database holding a record you can never reach.

## Where teams use the Email Check API

1.  Validating email at sign-up before sending anything
    
2.  Blocking disposable addresses in onboarding
    
3.  Cleaning an existing mailing database
    
4.  Protecting sender reputation from bounces
    

## Frequently Asked Questions (FAQs)

Does it prove the customer owns the address?

No. It confirms the address is valid and deliverable. Ownership requires a confirmation link or OTP.

Why block disposable addresses?

They expire quickly, so any account tied to one becomes unrecoverable, and they correlate with throwaway and fraudulent sign-ups.

How does it help deliverability?

Repeated bounces damage sender reputation. Filtering bad addresses before sending protects your ability to reach real customers.

## Related APIs

-   [Contact Details by GST API Fetch the mobile number and email address registered against a GST number, giving you verified contact details for a business you are onboarding.](/apis/gst-to-contact-details/)
-   [Email Verification Send OTP API Send a one-time password to an email address to begin verifying the customer controls that inbox, the first step of email ownership verification.](/apis/send-email-otp/)
-   [Validate Email OTP API Validate an email one-time password and confirm the customer controls the address they supplied, completing email ownership verification.](/apis/validate-email-otp/)
-   [Aadhaar XML Verification API Verify an offline Aadhaar eKYC XML by validating UIDAI's digital signature and extracting identity, address and photograph.](/apis/aadhaar-xml-verification/)

## Start verifying with the Email Check API

Book a walkthrough and we will show the call, the response and how it fits your onboarding flow.

[Book a Demo](/book-demo/) [Browse All APIs](/apis/)

-   One API key for every check
-   Verified against official Indian records
-   Built for onboarding at scale