The Postmark Ruby SDK by Wildbit allows API interaction with the aim to send emails and provide statistics for service improvement. References for implementation explain how to install with gem, get an Api token, and communicate with the API. Code shows how to send an email message, send an HTML message, and send attachments.
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."
An email address can be the key to an online identity, and that's just what IDLight is using in its identity lookup API. By supplying either an email address or a URL to the IDLight API you could be turning the key to unlock a swath of identity information.