email configuration for rails

email.rb

# Loads ActionMailer settings from config/email.yml
# and turns deliveries on only if configuration block is found
config_file = Rails.root.join('config','email.yml')

if File.file?(config_file)
  mailconfig = YAML::load_file(config_file)

  if mailconfig.is_a?(Hash) && mailconfig.has_key?(Rails.env)
    # enable deliveries
    ActionMailer::Base.perform_deliveries = true

    mailconfig[Rails.env].each do |key, value|
      value.symbolize_keys! if value.respond_to?(:symbolize_keys!)
      ActionMailer::Base.send("#{key}=", value)
    end
  else
    # disable deliveries
    ActionMailer::Base.perform_deliveries = false
  end

end

email.yml

development:
  delivery_method: smtp
  smtp_settings:
    address: smtp.gmail.com
    port: 587
    domain: gmail.com
    user_name: foo
    password: bar
    authentication: plain
    enable_starttls_auto: true
  default_url_options:
    host: localhost
    protocol: http
    port: 3000