i do... i do... uses 5 technologies like AWS Route53, Mailchimp Transactional Email (formerly Mandrill), and Mandrill. View i do... i do...'s complete Tech Stack.
Mailchimp Transactional Email (formerly Mandrill) is a reliable, scalable and secure delivery API for transactional emails from websites and applications.
Mandrill is a scalable and affordable email infrastructure service, with all the marketing friendly analytics tools they come to expect from MailChimp.