isBizMail tells you whether a given email address is free (gmail.com, yahoo.es, yandex.ru etc) or not. Detects around 4-5k domains and sub-domains.

Under the hood isBizMail mostly relies on 3-rd party domain lists created by people and organizations mentioned in Credits section.

• PHP implementation (PHP 5.4.0+)
• .NET implementation (.NET Standard 2.0+)

You can support us in a small way, please consider starring and sharing this repo! It helps us getting known and grow the community.

You can install isBizMail for JavaScript via your prefered dependency manager, e.g. Yarn

yarn add is-biz-mail

or via NPM

npm i is-biz-mail

One of examples of vanilla JavaScript usage might be a simple HTML page:

<script src="https://cdn.jsdelivr.net/npm/is-biz-mail/dist/is-biz-mail.js"></script>
<script>
    var result = isBizMail.isValid('[email protected]"');
    console.log([email, result]);   // (2) ["[email protected]", false]
</script>

import isBizMail from 'is-biz-mail';

let result = isBizMail.isFreeMailAddress('[email protected]');
console.log([email, result]);   // (2) ["[email protected]", true]
// ...

const isBizMail = require('is-biz-mail');

let result = isBizMail.isFreeMailAddress('[email protected]');
console.log([email, result]);   // (2) ["[email protected]", true]
// ...

yarn
yarn test

or via NPM

npm install
npm test    # or ./node_modules/.bin/mocha

• SpamAssasin's 'freemail domains' filter
• SpamAssasin's 'mailcom domains' filter
• Matthieu Moquet's list of disposable emails.