mail interceptor in rails

mail interceptor

# lib/mailinterceptor.rb

class MailInterceptor
  def self.delivering_email(message)
    message.to = "dev@example.com"
    message.subject = "[#{message.to}] " + message.subject
  end
end

# config/initializers/setup_mail.rb

email_settings = YAML::load(File.open("#{Rails.root.to_s}/config/email.yml"))
Mail.register_interceptor(MailInterceptor) unless email_settings['live'].present? && email_settings['live'] == 1