gistfile1.txt

#!/usr/bin/env ruby
require 'bundler'
Bundler.setup
require 'gmail'

Gmail.connect!('[email protected]', '...') do |gmail|
  emails_count = gmail.inbox.emails.count
  gmail.inbox.emails.each_with_index do |email|
    puts "#{email.uid} / #{emails_count}"
    File.open("mailbox/#{email.uid}", 'wb') do |f|
      f << email.raw_message.raw_source
    end
  end
end