Using Deno’s SMTP client

Deno is a JavaScript and TypeScript runtime built on the V8 JavaScript engine and Rust, offering first-class TypeScript support without the need for manual configuration. Unlike Node.js, Deno lacks a package manager and relies on URLs for importing packages, which has both advantages and disadvantages. The tutorial guides users through creating a Deno application that sends emails using Deno's SMTP mail client, requiring a basic understanding of JavaScript, a text editor like VS Code, and POSTMAN. It covers setting up a server with the Oak middleware framework, creating routes, and implementing a mail-sending function using environment variables to securely store Gmail credentials. The tutorial emphasizes the importance of using environment variables for sensitive information and demonstrates testing the application via POSTMAN. The tutorial concludes by highlighting the ease of sending messages with the Deno SMTP client and its common use cases, such as sending newsletters and templated emails, with the full source code available on GitHub.