Send SMS through gmail. Extracted from an irc-bot plugin I made. Currently works with Claro, AT&T and T-Mobile. Feel free to add more carriers :)

spam_bitch.rb

require 'mail'

module SpamBitch
  module Phone
    def self.carriers
      { claro: 'vtexto.com', att: 'txt.att.net', tmobile: 'sms.tmobile.net' }
    end

    def self.send_sms(telephone, msg, carrier)
      options = {
        :address        => 'smtp.gmail.com',
        :port           => 587,
        :domain         => 'gmail.com',
        :authentication => 'plain',
        :user_name      => ENV['EMAIL'],
        :password       => ENV['PASSWORD'],
        :enable_starttls_auto => true
      }

      Mail.defaults do
        delivery_method :smtp, options
      end

      mail = Mail.new do
        from     "#{ENV['EMAIL']}"
        to        "#{telephone}@#{SpamBitch::Phone.carriers[carrier]}"
        subject  'SMS from SpamBitch'
        body     " #{msg}"
      end
      mail.deliver!
    end

    def self.sms(carrier='')
      gateway = carrier.empty? ? carriers[random_carrier] : carriers[carrier]
      "#{telephone.gsub(/-/, '')}@#{gateway}"
    end
  end
end