Rebelmail publicly launched its interactive email API. After successful private integrations with ESPs like Mailjet, SendGrid, and others; Rebelmail is ready for third party integrations across the board. Through the API, users can build, send, and track interactive emails directly within an app.
Google has announced its latest API with a haiku of all things:
New admin tool dawns
Settings change like the seasons
For hosted email
That's from Andrew Olsen of the Google Apps team, announcing the Google Email Settings API, which allows IT administrators at organizations that use the Gmail-based Google Apps hosted webmail solution to "programmatically update Gmail settings for their users in bulk by making requests to a GData feed." Previously, settings could only be changed manually, on an account-by-account basis.