Rails Contact Form w/ Gmail SMTP

gistfile1.rb

# Majority of this solution was written and posted here:
# http://matharvard.ca/posts/2011/aug/22/contact-form-in-rails-3

# http://railscasts.com/episodes/206-action-mailer-in-rails-3


# config/initializers/smtp_settings.rb
ActionMailer::Base.smtp_settings = {
	:address => "smtp.gmail.com",
	:port => 587,
	:domain => "example.com",
	:user_name => "[email protected]",
	:password => "secret",
	:authentication => "plain",
	:enable_starttls_auto => true
}


#create a message class in file app/models/message.rb

class Message

  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming

  attr_accessor :name, :email, :subject, :body

  validates :name, :email, :subject, :body, :presence => true
  validates :email, :format => { :with => %r{.+@.+\..+} }, :allow_blank => true
  
  def initialize(attributes = {})
    attributes.each do |name, value|
      send("#{name}=", value)
    end
  end

  def persisted?
    false
  end

end


# run rails g mailer ContactMailer
# creates file called app/mailers/contact_mailer.rb

class ContactMailer< ActionMailer::Base

  default :from => "[email protected]"
  default :to => "[email protected]"

  def new_message(message)
    @message = message
    mail(:subject => "#{message.subject}")
  end

end

# create the file app/views/notifications_mailer/new_message.text.erb

 Name: <%= @message.name %>

 Email: <%= @message.email %>

 Subject: <%= @message.subject %>

 Body: <%= @message.body %>


# Run rails g controller contact and then open app/controllers/contact_controller.rb

class ContactController < ApplicationController

  def new
    @message = Message.new
  end

  def create
    @message = Message.new(params[:message])
    
    if @message.valid?
      NotificationsMailer.new_message(@message).deliver
      redirect_to(root_path, :notice => "Message was successfully sent.")
    else
      flash.now.alert = "Please fill all fields."
      render :new
    end
  end

end


# To get these actions working, open up config/routes.rb and insert the following two lines

 match 'contact' => 'contact#new', :as => 'contact', :via => :get
 match 'contact' => 'contact#create', :as => 'contact', :via => :post

# create app/views/contact/new.html.erb


<%= form_for @message, :url => contact_path do |form| %>
  <fieldset class="fields">
    <div class="field">
      <%= form.label :name %>
      <%= form.text_field :name %>
    </div>
    
    <div class="field">
      <%= form.label :email %>
      <%= form.text_field :email %>
    </div>
    <div class="field">
      <%= form.label :subject %>
      <%= form.text_field :subject %>
    </div>
    
    <div class="field">
      <%= form.label :body %>
      <%= form.text_area :body %>
    </div>
  </fieldset>
  
  <fieldset class="actions">
    <%= form.submit "Send" %>
  </fieldset>
<% end %>

Thanks for this!

define your routes like this:
get 'contact' => 'contact#new'
post 'contact' => 'contact#create'

Sorry, I've like to ask why I am having this error?