Dilli Email Validator WordPress plugin now supports whitelisting email addresses

We are happy to announce the release of version 1.5.8 of Dilli Email Validator – a WordPress plugin that seamlessly embeds advanced email address validation capabilities in a WordPress site by integrating with Dilli Email Validation Service. This new version allows site admins to whitelist email addresses by adding them (as comma separated values) to the ‘Whitelist’ field in the plugin settings. If a use case in the WordPress site triggers validation of any of these whitelisted email addresses, our plugin will simply ignore it and not issue an API request to our email validation service. This would not only reduce the latency because of fewer API requests but also lower the cost since every API request consumes a validation credit. Thus, leading to a better user experience and a reduction in costs.

A classical example of where this feature is useful is when a site admin uses Contact Form 7 plugin for embedding forms on the site and have multiple recipients (to, bcc, and/or cc) configured to receive data from form submissions. While the intent of the site admin is to validate the user e-mail address (as filled in the form) only, the recipient e-mail addresses get validated in addition, upon every form submission. Each e-mail address validation issues a corresponding API request to our validation service. Only when our validation service validates all of the email addresses and responds to each of the queued API requests, the form submission succeeds. This leads to a bad user experience especially when there are many recipients configured in the Contact Form 7 settings. Now, with the ‘Whitelist’ feature, site admins can simply add the recipient email addresses configured in the Contact Form 7 plugin form settings to the ‘Whitelist’ field in the Dilli Email Validator plugin settings and the system will not validate the recipient email addresses upon a form submission leading to better user experience and reduction in costs.

Dilli Email Validator now detects Non-Business Email Addresses!

Dilli Email Validation now has the capability to detect non-business (common) email addresses from FREE email providers such as Gmail.com, Yahoo.com, Outlook.com, etc. This feature is particularly useful when you want to filter out non-serious queries from your contact forms. Most prospects will enter their business email in your lead capture forms, not their personal e-mail addresses (@gmail.com, @yahoo.com, etc.).

Continue reading “Dilli Email Validator now detects Non-Business Email Addresses!”
DEVA detects restricted domains

Dilli Email Validation API (DEVA) now detects email domains belonging to adult sites

Tired of constant spam with explicit content that are sent from email addresses with domains pointing to objectionable sites? Deploy Dilli Email Validation API to your rescue now!

Dilli Email Validation API (DEVA) now supports an optional check to mark email addresses as invalid if their domain points to a site containing sexually explicit content. This feature is currently in beta and is available immediately to existing and new users. However, it is turned off by default. If you are an existing user and will like to enable this check on your account, please reach out to us.

Start Validating for FREE

Sign Up now and get your API key.

Sign Up

‘Dilli Email Validator’ (DEV) WordPress Plugin v1.1.0.0 Released

Today, we are delighted to release a newer version ( of Dilli Email Validator(DEV) WordPress plugin. Dilli Email Validator provides advanced validation for email form fields on WordPress sites using DEVA (Dilli Email Validation API). This newer version adds out of the box validation for email fields in forms built using Ninja Forms Wordpress plugin. Simply install, activate and configure DEV and get automatic email validation built into your WordPress sites so as to prevent malicious submissions and typographical errors. DEV already supports email form field validation in other popular form plugins like Contact Form 7, etc.

‘Stop Forum Spam’ Email Blacklist Check in DEVA

StopForumSpam.com maintains a list of known malicious emails used for spam in blogs, forums and wikis. Beginning today, Dilli Email Validation API (DEVA) has added a new validation rule to check an email address against the StopForumSpam’s email blacklist to ensure that ‘bad guys’ are kept at bay from your website. This further enhances already existing advanced email validation capabilities of DEVA to help eliminate spammers from eavesdropping on your websites or other applications. Learn more about DEVA here.

Introducing DEVIL (Detection and Exclusion of Vulgar and Improper Language) API

Are you in the lead generation business ? Leads containing profanity are most likely spam leads. They go undetected coming from clean IPs with valid content. Since they go undetected, they unfortunately make it to your recipient and do much harm to the trust and thus your business. At Dilli Labs LLC, we advice that you validate your lead content for profanity using our following API and prevent sending the lead to your recipients if the lead contains vulgar keywords. DEVIL (Detection and Exclusion of Vulgar and Improper Language) is a simple profanity filter REST API for developers that determines whether text contains profanity or not. Click here for Demo, Usage and Pricing information.

Email Validation API

Check if an email address is valid in real-time using Dilli Email Validation API (DEVA). Stop spammers from submitting forms with fake email addresses, warn users of mistyped email address or clean up a mailing list using this API.


Get started for FREE

Sign Up now and get your API key.

Sign Up



Dilli Email Validator plugin provides a seamless plug and play integration of DEVA into your WordPress site.


dilli-email-validation npm package lets you easily embed DEVA in your Node.js app.


GET https://deva.dillilabs.com/api/{API_KEY}/email/{address}
true if valid
false if invalid

How DEVA validates an email address?

  • Format Validation: DEVA ensures that an email address has a valid format. Ex : validusergmail.com is invalid email address because its missing the ‘@’ before the domain ‘gmail.com’.
  • MX Records: An email address with a domain that does not have an MX record in its DNS settings is invalid. Ex: user@domainWithNoMXRecord is invalid. DEVA finds if MX records exists for the domain tied to an email address. If no MX records exist, the email address is reported as invalid.
  • Disposable Email Address: DEVA maintains a list of throwaway/disposable email addresses or junk collector email addresses and validates emails against this list. Ex : user@0-mail.com will be invalid.
  • ESP (Email Service Provider) Grammar Rules: Ex : @yahoo.com emails cannot have user part less than 4 characters. We learn new ESP grammar rules every now and then and incorporate into our validation algorithm.
  • Spam Email Address detection: DEVA has access to a gigantic third party database of email addresses known to spam. It queries this database to determine the validity of an email address. Ex : aanetaegooglety@gmail.com is one such email address that is known to spam.
  • Profanity Check: This is a distinguishing feature of DEVA. It checks email addresses for profanities and marks them invalid if found.
  • Role Based Email Address detection: DEVA detects generic group role based email addresses like info@, support@, store@, etc and marks such email addresses as invalid. (This is an Optional check and turned off by default)
  • Patterns: There are countless patterns we discovered while validating over 50,000 emails every month for our clients that are obviously invalid emails. Ex : jondoe@gmail.com, foobar@gmail.com, noemail@gmail.com, etc. DEVA is constantly learning and building up the black listed patterns as our user base grows.
  • Blacklisted Domains: Ex: example.com is reserved and can’t be used in practice. Therefore, all emails having this domain are marked invalid by DEVA.
  • Safe Domains: If the domain represents an adult site, the email is treated as invalid. (This is an Optional check and turned off by default)
  • Custom Blacklist: You may request certain valid domains, top-level domains, emails and users to be blocked. For example: A site may never want any mail.ru email address to be used on their site due to the higher probability of it being a malicious email address. Or, it may want to block all email addresses with top level domains such as .ru blocked (Example: eldoragffaity@rambler.ru). Or, you may want to treat all email addresses with only digits in the user part as invalid. We can add such custom validation rules.
  • Custom Whitelist: You may request certain known valid email addresses to be whitelisted.
  • Unsolicited Marketing: Ex: *seomarketing*@gmail.com. Many online marketing companies leverage contact forms on websites to send solicitations for business. We maintain a list of email addresses and patterns in email addresses used in such unwanted offers. (This is an Optional check and turned off by default)
  • Non-business (Common) Email Address Detection: Ex: *@gmail.com, *@yahoo.com, *@hotmail.com. We maintain a list of FREE email providers such as gmail.com, yahoo.com, me.com, etc. One can use DEVA to detect if an e-mail address is from a FREE email provider to filter out non-business e-mail addresses. Read More

Note: You may request to disable any of the above filters when validating with DEVA.

Client Testimonials

We do online lead generation in various verticals using Dilli Email Validation API (DEVA) which has been crucial to our success. We’ve tried a couple different services, all of which charge significantly more while doing significantly less. I can’t recommend this product enough, GREAT value here.

Joe Webster
Director of Marketing, TOLM Inc.


FREE 100 validations upon signing-up. After that, 1/2 a cent per validation. Note : Our experts will integrate DEVA in your system at no additional charge. Sign Up now to get your API key and start validating email addresses with DEVA.

Sign Up for FREE