Ruby Spfquery
It's a thin wrapper around spfquery which is assumed to be in the PATH of the ruby process.
Installation
Add this line to your application's Gemfile:
gem 'ruby-spfquery', require: 'spfquery'
And then execute:
bundle
Or install it yourself as:
gem install ruby-spfquery
Usage
Spfquery.pass?(ip_address, mail_from, helo)