The Verifalia Node.js SDK by Verifalia allows to implement email validation features through REST API communication. Working with the SDK permits developers to submit email validation without waiting for its completion, retrieve submit validation, and delete a batch with its results.
Founded in 2010 and based in White Plains, NY, Ongage has a simple idea for email marketers: we deliver. It uses different ESPs to deliver mail according to which ones are most likely to succeed in reaching a given email address. Ongage calls this concept "micro-deliverability."