Mailinator started 17 years ago as a weekend project to define the idea of “Free, Disposable, Email”. Back then, it ran on a single server with only a single developer. Over time, it’s popularity has exploded in terms of both incoming email and active users. As you might guess when you go from thousands of emails-per-day to thousands of emails-per-second, the behind-the-scenes technical stack needs to evolve - and Mailinator’s stack has had a quite a technical journey.