This is very useful, I use it with Docker Compose in my Flask course to handle sending email in development and tests in a way that doesn't require making an external network call or set anything up on my host. It's perfect for local development and the maintained Docker image supports amd64 and arm64 CPU architectures.
An example of that is here: https://github.com/nickjj/build-a-saas-app-with-flask/blob/d...