From scratch: Rails Mailer, letter_opener, RSpec & Heroku

While Michael Hartl’s Rails Tutorial covers an awful lot of ground, it necessarily leaves some topics out. One of these is the Rails Action Mailer, which Hartl offers as a suggestion for further extension of the SampleApp. While resources for getting the Mailer to work are plentiful, they are rather decentralized, especially for the particular scenario described in this article’s title. Here, then, are the steps I needed to follow to get everything up and running.