contact_email.html.erb

<p><%= @contact.message %></p>
<p>---------------------</p>
<p><%= ContactUs.require_name ? t('.sent_by_name', :email => @contact.email, :name => @contact.name) : t('.sent_by_contact_form', :email => @contact.email) %></p>

contact_us.rb

# Use this hook to configure contact mailer.
ContactUs.setup do |config|

  # ==> Mailer Configuration

  # Configure the e-mail address which email notifications should be sent from.  If emails must be sent from a verified email address you may set it here.
  # Example:
  # config.mailer_from = "[email protected]"
  config.mailer_from = nil

  # Configure the e-mail address which should receive the contact form email notifications.
  config.mailer_to = "[email protected]"

  # ==> Form Configuration

  # Configure the form to ask for the users name.
  config.require_name = false

  # Configure the form to ask for a subject.
  config.require_subject = false

  # Configure the form gem to use.
  # Example:
  # config.form_gem = 'formtastic
  config.form_gem = 'formtastic'

end

new_formtastic.html.erb

<div class="panel">
	<h2><%= t('.contact_us') %></h2>
	<%= semantic_form_for @contact, :url => contacts_path do |f| %>
	  <%= f.input :name, :label => t('.name') if ContactUs.require_name %>
	  <%= f.input :email, :label => t('.email') %>
	  <%= f.input :subject, :label => t('.subject') if ContactUs.require_subject %>
	  <%= f.input :message, :as => :text, :label => t('.message') %>
	  <%= f.action :submit, :label => t('.submit'), :button_html => { :alt => t('.submit'), :id => 'contact_us_contact_submit', :title => t('.submit') } %>
	<% end %>
</div>