courier.rb

class Courier < ActionMailer::Base

  CIPHER = ActiveSupport::MessageEncryptor.new("redacted", "aes-256-cbc")
  
  module ClassMethods
    delegate :encrypt, :to => :"Courier::CIPHER"

    def valid_email_address? email_address
      (not email_address.blank?) and email_address.include?("@")
    end

    def decrypt cipher
      begin
        Courier::CIPHER.decrypt(cipher)
      rescue ActiveSupport::MessageEncryptor::InvalidMessage
        nil
      end
    end
  end

  extend ClassMethods

  def email to_address, from_text, message
    recipients to_address
    from       "do-not-reply@website.org"
    subject    "Message from the website"
    body       :from_text => from_text, :message => message
  end

end