Meteor documentation regarding new file structure

It seems as though there’s lots of Meteor developers struggling to come to grips with the new modular approach (myself included). Is there any way Meteor could provide a little more assistance in regards to best practice when utilising their common packages. For instance, I just installed the email component. The documentation states ‘server’. Could meteor provide more insight and possible suggestions for where to reference it and how to activate it?
Path: imports/startup/server/email-server.js1
if (Meteor.settings.private.MAIL_URL){ process.env.MAIL_URL = Meteor.settings.private.MAIL_URL ; }

Path: imports/startup/server/index.js
import './email-server.js';

Folder structure is completely up to your preference. If you don’t have a preference, just follow what Meteor does in their tutorial.