Creating an SMTP server

In this recipe, we'll create our own internal SMTP server (just like the first SMTP servers) using the smtp-protocol module.

For information on converting an internal SMTP server to an externally exposed MX record server, see the There's more... section at the end of this recipe.

Getting ready

Let's create a folder called smtp-server, with an index.js file.

Then on the command-line from within the smtp-server directory, we can initialize our folder and install the smtp-protocol module:

$ npm init -y 
$ npm install --save smtp-protocol

How to do it...

...