Mandrill is a reliable, scalable, and secure delivery API for transactional emails from websites and applications. It's ideal for sending data-driven transactional emails, including targeted e-commerce and personalized one-to-one messages.
The posty_API is the core element of the posty softwarestack. It is developed to administrate a mailserver based on Postfix and Dovecot. It offers an easy REST interface which can be used in own applications or with the posty client applications, posty_CLI and posty_webUI.
The Winning Email API allows you to access our services from your applications. Contact us if you need help with anything, or require access to something we don't yet offer. The API overview is available here.