If your app needs to send a welcome email, a password reset link, or an order confirmation, you don't need to stand up a mail server. You need one HTTP call. This tutorial builds a small Python CLI that sends transactional email through Mailgun's API, then checks whether Mailgun actually delivered it. By the end, you'll have replaced "sending email" with a simpler model: call an API, read the response, done. What you need before starting Before you start, gather the following:...