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.

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‘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 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.


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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.


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 : is invalid email address because its missing the ‘@’ before the domain ‘’.
  • 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 : will be invalid.
  • ESP (Email Service Provider) Grammar Rules: Ex : 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 : 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 :,,, etc. DEVA is constantly learning and building up the black listed patterns as our user base grows.
  • Blacklisted Domains: Ex: 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, emails and users to be blocked. For example: A site may never want any email address to be used on their site due to the higher probability of it being a malicious email address. We can add such custom requests to your validation.
  • Custom Whitelist: You may request certain known valid email addresses to be whitelisted.
  • Unsolicited Marketing: Ex: *seomarketing* 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)

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.
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