Mail Jägger is a free JSON API that gives you a simple way to validate/verify email addresses. You can get the free source code and run it on your server or use this service for free ;)

Verify!

How to use it?

https:[email protected]
OR
emailvalidator::check([email protected]');

How works?

1. checks Email Format/Syntax
2. checks MX-Records (SMTP)
3. checks for Disposable Addresses
4. returns JSON
{"valid":true,"message":"[email protected]"}
{"valid":false,"message":"Banned domain sharklasers.com"}