SimpleMailingList

日本語説明（こちらの方が詳細）

Add this line to your application's Gemfile:

gem 'simple_mailing_list'
gem 'sqlite3'
# gem 'mysql2'
# gem 'pg'

And then execute:

$ bundle

Or install it yourself as:

$ gem install simple_mailing_list

$ simple_mailing_list help

Bug reports and pull requests are welcome on GitHub at https://github.com/nodai2hITC/simple_mailing_list.

The gem is available as open source under the terms of the MIT License.