This gem logs email sent by a Rails application to a database table.
In your Gemfile, add this line:
gem "mailbag"
Then, run bundle install.
Run the generator and migrate:
rails g mailbag
rake db:migrate
You don't have to do anything. Any mail sent out by ActionMailer will be logged to the email_logs table. EmailLog is a standard ActiveRecord model that you can use to interact with your email log.