This library written in Node.js provides a Heroku plug-in for the SendGrid Web API to display SendGrid statistics on Heroku sites. SendGrid is an email client that allows sending and receiving of email messages.
Mailgun added a slew of new features to its email validation API including target mailbox validation, role-based address check, disposable mailbox, reporting, and rate limits. Additionally, Mailgun added the API under its existing SLA and has transitioned to a tiered, usage-based pricing model.
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.