#1 Bulk Email Verification API for Email List Validation | Whois XML API

Check the availability, validity, and quality of your email list right away

For checklists of emails with the Bulk API, first, upload the emails to the server which will create a verification request and return its ID to you.

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1000 free requests monthly. No credit card required.

Email Verification Bulk API

For every email address, we help verify that:

  • The syntax is correct

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

  • There are no typos and curse words

    Typos and curse words are among common fake email patterns that could be the mark of a cyber attack or abuse. Filtering these from your email list is important.

  • The address is not disposable

    Temporary email addresses are supplied by email service providers like Mailinator, GuerrillaMail, and 2000+ others. They are created for short-term purposes in mind, and some of them can be malicious.

  • There is a corresponding mail server

    Every branded email address should be accompanied by a valid domain that has its DNS MX records 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 is suspicious.

  • The address is not a catch-all

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

Disposable Email Domains Data Feed

Disposable Email Domains Data Feed

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

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Email Verification Bulk API

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

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