Dilli Email Validator


Add advanced email address validation using Dilli Email Validation API (DEVA). Prevent a site visitor from submitting a form with fake or incorrect email address on your site. No more lost leads due to mis-typed email addresses. No more wasting your precious time reading and responding to spam leads with incorrect email addresses. It hooks into the WordPress core function that is used by most form plugins to validate email address. As a result, it works with most forms.

Learn more about Dilli Email Validation API. This plugin requires an API Key which can be obtained for FREE by signing up here.

Known Compatible Forms

  • WordPress registration
  • Contact Form 7
  • Gravity Forms
  • Ninja Forms
  • Jetpack/Grunion contact forms
  • Any other forms that uses is_email($email) WordPress core function to validate email address field.

Available Languages

  • English
  • German (Deutsche)


  • Validates email address format. Ex: email address fooAtdillilabs.com is invalid because of missing ‚@‘
  • Checks for existence of MX records of the email address domain. Ex: foobar@dlfkdlfkf.co is invalid because no MX records exist for domain dlfkdlfkf.co.
  • Checks for Disposable/Temporary email addresses. Ex: user@mailinator.com is invalid because mailinator.com provides temporary shared temporary email inboxes.
  • Checks for conformity with ESP (Email Service Provider) grammar rules. Ex: bob@yahoo.com is invalid because Yahoo does not allow user part (bob in this case) to be less than 4 characters.
  • Checks for profanity in user part of email address. Ex: f***you@gmail.com is invalid.
  • Checks user and domain parts of an email address for known malicious patterns. Ex: jondoe@gmail.com, foobar@yahoo.com, idontwanttogive@gmail.com and noemail@gmail.com will be treated as invalid.
  • Checks email address domain against a known blacklist.
  • Checks email address against a known blacklist of frequently used email addresses for spam.
  • Checks for reserved domains. Ex: example.com is a reserved domain. Therefore, validemail@example.com is not allowed.
  • Checks for Role-based email addresses. Ex: info@someorganization.com will be treated as invalid.
  • Checks for safe domains. Restricts emails whose domains represents sites with adult content.
  • Add custom blocklist. You may request certain domains, emails and users to be blocked.


  • Configuration under WP-Admin Dashboard->Settings->Email Validation
  • Email field validation in Contact Form 7 using Dilli Email Validator.


  1. Unzip and upload the dilli-email-validator folder to the /wp-content/plugins/ directory.
  2. Activate the Dilli Email Validator plugin through the ‚Plugins‘ page in WordPress.
  3. Configure the plugin by going to Settings > Email Validation page.
  4. Get API Key by signing up with Dilli Email Validation API.
  5. Paste your API key in WP-ADMIN at Settings > Email Validation page, verify it and then Save changes.


Where do I obtain the API key?

Register instantly for FREE with Dilli Email Validation API to receive your API key

Is there a dashboard where I can track valid and invalid emails?

Yes, you may track it here. The dashboard URL is also accessible from within the WordPress dashboard on Settings->Email Validation page.

Will this work with Contact Form 7?


Will this work with Ninja Form?


Will this work with Gravity Form?


Will this work with Jetpack/Grunion Form?


Can I use the same API key on different websites ?



6. Juli 2020
Does it exactly as they say, and super easy to use. Also provided super fast support when we reached out to them about upgrading. Thanks guys!!
20. August 2019
This plugin is superb, now we can really track who is downloading our Prospectus and contacting using valid Emails. and the SUPPORT is superb too. Thank you DILLI Team for Dilli Email Validation!! Highly Recommended plugin! -cristechservice
19. Februar 2019
My website received hundreds of spam messages. After installing the plugin, I have not received spam messages.
11. Dezember 2018
Using the free 100 validation took 5 minutes having 10 logins only on my site. Each login (not registration! login!!!) used 5 validations. I see no sense in validating logins (well, it makes sense for the provider asking 0.5 cents per validation). Even my admin user's (already logged in) ajax calls were validated each time. And the worst is that it blocked valid users logging in with an email address from free email providers (not disposable).
11. Oktober 2018
The Dilli Email Validator plugin is a necessity for all WordPress sites. Since installing the Dilli Email Validator on our website, there has been a significant decrease in spam submissions on registration forms and comment sections. Brilliant!
Lies alle 7 Rezensionen

Mitwirkende & Entwickler

„Dilli Email Validator“ ist Open-Source-Software. Folgende Menschen haben an diesem Plugin mitgewirkt: