Add (Gemfile, Gemfile.lock, mail.txt) Add gem mail and mail.txt with login and pass for fake e-mail.

Create (welcome_email.html.erb, development.rb, fake.rake) Refactoring rake task, add task for send email, create fake mailer and mailer view, smtp config for send email via gmail.com

Edit (readme.md) Add information for fake email

Edit (production.rb) Add config smtp

Edit (devise.rb) Add secret_key for devise init

refactoring (development.rb, production.rb, application.rb) Dry code. Move smtp setting to application.rb

add (Gemfile, Gemfile.lock) add gem rails_config

edit (application.rb) write config for two configuration on smtp servers.

refactoring (application.rb, config/settings) rewrite config for two configuration on smtp servers.

refactoring (application.rb, settings.yml) rewrite replace config.

merge all commit in one commit

$ git rebase -i 5a044afc2e6a80ff42266dcc539b13ebd886b8d0