ActionMailer with more than one SMTP Account

gistfile1.rb

# this is my action mailer setup and can be improved
# based on http://broadcast.oreilly.com/2009/03/using-multiple-smtp-accounts-w.html
# config/initializer/action_mailer.yml
development:
  default:
    address: "smtp.provider.com"
    port: 25
    domain: 'mywebsite.com'
    user_name: 'mailer@mywebsite.com'
    password: '12345'
    authentication: "plain"
  orders_mailer:
    address: "smtp.provider.com"
    port: 25
    domain: 'mywebsite.com'
    user_name: 'orders@mywebsite.com'
    password: '12345'
    authentication: "plain"

# config/initializers/mailer_initializer.rb
class ActionMailer::Base

  def self.load_settings(profile = :default)
    settings = YAML.load_file("#{Rails.root}/config/action_mailer.yml")[Rails.env][profile.to_s] || {}
    settings = settings.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
    if settings
      default :delivery_method => :smtp
      self.smtp_settings = settings
    end
  end


end
ActionMailer::Base.load_settings(:default)

# app/models/generic_mailer.rb
class GenericMailer < ActionMailer::Base
  default :from => "mailer@mywebsite.com"

end

# app/models/order_mailer.rb
class OrderMailer < ActionMailer::Base
  default :from => "orders@mywebsite.com"

  load_settings :orders_mailer


end