Email Validation API – Verify Email Addresses Instantly

DEVA (Dilli Email Validation API) is a simple REST API to validate the authenticity of an e-mail address without sending a verification e-mail to its owner. Using DEVA, you can integrate email validation in your system, reduce your bounce rate and improve your business reputation.

Try Dilli Email Validation API

Some of the factors used to determine validity of an e-mail address are as follows :

  • Format Validation : DEVA ensures that e-mail address is valid. Ex : e-mail addresses with missing @ are not valid.
  • MX Records’ Existence : DEVA validates that MX records exist for the domain tied to the e-mail address.
  • Disposable/Temporary Email Address detection : 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 : e-mails 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 the email address. Ex : is one such email address that is known to spam.
  • Profanity Check : This is a distinguishing feature of DEVA. It checks e-mail addresses for profanities and marks them invalid if found.
  • Patterns : There are countless patterns we discovered while validating over 50,000 e-mails every month for our clients that are obviously invalid e-mails. 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 e-mails having this domain are marked invalid by DEVA.

Read our clients’ testimonials :

We do online lead generation in various verticals using Dilli Labs Email Validation (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.


Request :

Response :
true if valid
false if invalid


FREE 1 month trial. After that, 1/2 a cent per validation billed on a monthly basis. Note : Our experts will integrate DEVA in your system at no additional charge. Contact us to get your API key and get started with DEVA now.

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WordPress : Check out Dilli Email Validator plugin that provides a seamless plug and play integration of DEVA into your WordPress site. Cut back on spam submissions via comment forms, contact forms and user registration forms using Dilli Email Validator and increase your productivity.