<http://schema.org/description>
"Sending emails used to be hard but with the Mailgun Email Sending API\u00A0we moved beyond SMTP and MIME and made it a trivial, dare I say, pleasant experience. But if your application needs to engage in email conversations, as..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://blog.mailgun.com/handle-incoming-emails-like-a-pro-mailgun-api-2-0/>