mail_form

contact_form.rb

class ContactForm < MailForm::Base
  
  attribute :name,     :validate => true
  attribute :nickname, :captcha => true
  attribute :email,    :validate => /[^@]+@[^\.]+\.[\w\.\-]+/
  attribute :message,  :validate => true
  
  def headers
    origin = "#{name} <#{email}>"
    return :subject  => ::I18n.t(:subject, :scope => [:actionmailer, :contact_form]),
           :from     => origin,
           :reply_to => origin,
           :to       => Settings.mailer.contact_email
  end
  
  def persisted?
    false
  end

end

contacts_controller.rb

class ContactsController < ApplicationController
  
  def new
    @contact = ContactForm.new(params[:contact_form])
  end
  
  def create
    @contact = ContactForm.new(params[:contact_form])
    if @contact.valid?
      @contact.deliver
      redirect_to :root, :notice => tf('contact.thanks')
    else
      render :action => "new"
    end
  end
  
end

gemfile

gem 'mail_form', '>= 1.2.1'

new.html.haml

= semantic_form_for @contact, :url => contact_us_path do |f|

  = f.inputs :name => "Your Contact Details" do
    = f.input :name
    = f.input :nickname
    = f.input :email
  
  = f.inputs :name => "Your Message" do
    = f.input :message, :input_html => {:rows => 8}, :as => :text
    
  = f.buttons do
    = f.commit_button "Contact Us"