Bulk Email Verification API | Batch validation | WhoisXML API

#1 Bulk Email Verification API for Batch and Fast Results

Running email address lists with Bulk Email Verification API is easy. Upload the file to our server and get a verification request ID ticket that you can use to get the results.

Get started

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

Email Verification Bulk API

Each bulk email validation API call verifies that:

  • The syntax is correct

    We check all email addresses on a list against established IETF standards with an advanced engine for email validation according to syntax.

  • Addresses do not come from a free email service provider

    Email addresses issued by free email service providers are unlikely to be linked to corporate accounts and business leads.

  • Addresses are not disposable

    Temporary email addresses are supplied by email service providers like Mailinator, GuerrillaMail, or 2,000+ others. They are created for short-term purposes in mind and can be fraudulent.

  • There is a corresponding mail server

    Branded email addresses are typically accompanied by a valid domain that has its DNS MX records properly configured.

  • There is a corresponding mailbox

    An email address without a mailbox cannot receive messages and so likely does not add value to your email list or might be suspicious.

  • The address is not a catch-all

    Catch-all addresses aren’t always actively used by individuals and so may have questionable value on an email list.

Disposable Email Domains Data Feed

Find out more about our Disposable Email Domains Database

Download our database in the format of your choice and access complete lists of temporary email domains.

Order database
Email Verification Bulk API

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

Get started

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.

Learn more
Have questions?

We are here to listen. For a quick response, please select your request type or check our Contact us page for more information. By submitting a request, you agree to our Terms of Service and Privacy Policy.

Or shoot us an email to