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.
Additional third party integration with Gmail has been possible (you only have to look at all the contact import features from sites like Facebook), but these have either been clunky manual procedures that involve exporting contacts to a CVS file, or they require you to supply your email password. Neither option is all that attractive. Now there is an alternative. Google have recently added the ability to access the IMAP/SMTP features of particular Gmail account using OAuth.
Ubivox, email marketing service, has released a number of its features via the Ubivox API. Ubivox allows marketers to create, track, and manage email marketing campaigns directly in a web browser. Because Ubivox is web-based, no additional software becomes necessary to create top notch campaigns. From simple email marketing to tips, to enterprise grade web based software tools, Ubivox aims to be the go to newsletter partner.