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Byteplant Email Validator

With the Byteplant Email Validator plugin you can easily verify if an email address really exists and is valid (

This plugin uses the Byteplant Email-Validator API ( to check if an email address really exists or not.

The plugin integrates with the is_email() function of WordPress. It works seamlessly with:

  • Contact Form 7
  • Jetpack/Grunion
  • WordPress registration forms
  • and with any other form which uses the is_email() function (no changes required).

The plugin can also be integrated into 3rd party forms that do not use the is_email() function.

How does it work?

The Email-Validator API real-time validation process includes all of the following tests:

  • Syntax verification (IETF/RFC standard conformance)
  • DNS validation, including MX record lookup
  • Disposable email address (DEA) detection
  • Misspelled domain detection to prevent Typosquatting
  • Freemail address detection
  • SMTP connection and availability checking
  • Temporary unavailability detection
  • Mailbox existence checking
  • Catch-All testing
  • Greylisting detection

The plugin requires an API Key (free, no credit card required):

We do not send any email to the recipient address during the entire validation process. All processing is done on our servers, your IP addresses and domains are not affected in any way by the Email-Validator service - absolutely no blacklisting risk for your IPs and domains.

Data Protection and Privacy Policy: see the Frequently Asked Questions section.

Contributors byteplant
Tags anti-spam, comments, contact form, contact form 7, email, email validation, grunion, jetpack, spam, validation, woocommerce
  1. email-validator-by-byteplant screenshot 1

    Plugin page.

  1. Unzip and upload the plugin to the '/wp-content/plugins/' directory.
  2. Activate the plugin through the 'Plugins' menu in WordPress.
  3. Configure the plugin in the Settings section of the Administrator Dashboard.
  4. Register for an API key (free, no credit card required):
  5. Copy and paste your API key to the Settings section of the Administrator Dashboard.

Data Protection and Privacy Policy

We are committed to protect your data and your privacy when processing personal data. We do not process or store email addresses for any purpose other than validation. We do not share any client data with any third party at any time. We keep all data supplied by clients for the purposes of validation as confidential, to not disclose data to anyone within our organization without a need to receive it for the specific purpose for which its is being disclosed to us, and to not disclose this data to any third party.

Byteplant is located in Germany and operates according to the German Federal Data Protection Act (BDSG) and privacy legislation which is one of the strictest in the world (see for details).

Personal data according to the German Federal Data Protection Act means any information concerning the personal or material circumstances of an identified or identifiable individual. This includes your name and address but also data like your phone number and email address. All data is subject to a special protection in accordance with the German Federal Data Protection Act and other legal provisions which we enforce using both technical methods and strict company processes.

Do you store validated email addresses?

All data from API requests and batch/list processing will be automatically deleted within 14 days after the data has been processed.

Version 2.0

Requires WordPress version: 3.0.1 or higher

Compatible up to: 4.7.2

Last Updated 09 Dec 2016

Date Added: 28 Jan 2016


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