Sending thousands of personalised emails from your app shouldn’t mean sleepless nights, bloated servers, or black-box services. In this post, we break down a reliable, scalable email architecture using Nuxt 3, AWS Amplify, and Mailgun—complete with queues, previews, logging, and control. Whether you’re launching newsletters, onboarding users, or sending event reminders, this is the system we wish we had from the start.