Verify the existence, validity & quality of any email address

Our Email Verification API performs comprehensive validation of e-mail addresses in real-time in a very convenient manner. Verify email address of new user registrations, reduce email bouncing, block spam and more…

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1000 free requests monthly. No credit card required.

301,014,459Email addresses verified

2,489Satisfied customers

18,016,895Bounce backs prevented

For every email address, we check

Syntax

Check if the email address conforms to the IETF standards by using a complete syntactic email validation engine.
Typos and curse words

Check the email address against for common typos regarding popular email domains. Check fake email patterns.
Disposable email address

Check if the email address is supplied by a known Disposable Email Address provider such as Mailinator, 10MinuteMail, GuerrillaMail and 2000+ more.
Mail server existence

Check the availability of the email address domains by using DNS MX records.
Mailbox existence

Check if the email address exists and can receive emails by using SMTP connection and email-sending emulation techniques.
Catch-all email address

Check if the email address can receive emails for any number of other email addresses.

What isEmail VerificationAPI?

Practical usage

Increase marketing campaign results

In email marketing, it is important that the emails you send are verified, validated, and received by customers. One of the most common causes of bounced emails is sending them to unverified email addresses. Email campaign providers may close the business account when emails regularly bounce. By eliminating bounced emails and utilizing email verification and email validation tools you can increase your sender score and email campaign quality.

Ensure the users who sign up on your website have a valid and verified email address

Catches user typos with email validation when they’re entering their email address and prompts the user to fix typos before allowing them to register.
Lets you stay in touch with your users knowing you have a verifiable email address for: credit card expiration, receipts, new features and offerings, etc.
Ensures that your users can reset their password securely if forgotten: without email address verification and validation, there’s no way to validate someone’s identity outside of manual human verification.

Segment potentially dangerous emails

Prevent users from signing up for your website with disposable email addresses by using our email validation API tool. Users who sign up for these services usually try to bypass giving you their real email for a specific reason: maybe they want to abuse your freemium features, etc.
By ensuring you only allow users with real verifiable personal or business email addresses to register, you reduce the risk of abuse on your website.

Disposable Email Domains Data Feed

Get a complete list of current disposable email domains. We provide the most relevant data in a suitable format.

Request database

Simplify your work

To make coding against Email Verification API easier, use client libraries that reduce the amount of code you need to write.

Go to libraries

Get 1,000 free requests monthly. No credit card required.

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Enterprise API Packages

API access through WhoisXMLAPI can be purchased as an annual subscription. The access pricing is based on the number of queries, which is measured monthly with per-minute rate limits. The pricing structure gives predictability to business planning and solution architecture.

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Verify the existence, validity & quality of any email address

For every email address, we check

Syntax

Typos and curse words

Disposable email address

Mail server existence

Mailbox existence

Catch-all email address