diff --git a/Gemfile b/Gemfile
index 43dceb3ff..73325d81d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -41,10 +41,8 @@ gem 'ckeditor'
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug'
-
   # Access an IRB console on exception pages or by using <%= console %> in views
   gem 'web-console', '~> 2.0'
-
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
   gem 'rspec-rails', '~> 3.0'
@@ -52,6 +50,7 @@ group :development, :test do
   gem 'factory_girl_rails'
   gem 'launchy'
   gem 'quiet_assets'
+  gem 'letter_opener_web', '~> 1.2.0'
 end
 
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 675d3d304..9dad0c3ec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -108,6 +108,11 @@ GEM
     json (1.8.3)
     launchy (2.4.3)
       addressable (~> 2.3)
+    letter_opener (1.4.1)
+      launchy (~> 2.2)
+    letter_opener_web (1.2.3)
+      letter_opener (~> 1.0)
+      rails (>= 3.2)
     loofah (2.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
@@ -234,6 +239,7 @@ DEPENDENCIES
   jbuilder (~> 2.0)
   jquery-rails
   launchy
+  letter_opener_web (~> 1.2.0)
   pg
   poltergeist
   quiet_assets
@@ -247,3 +253,6 @@ DEPENDENCIES
   turbolinks
   uglifier (>= 1.3.0)
   web-console (~> 2.0)
+
+BUNDLED WITH
+   1.10.5
diff --git a/app/models/user.rb b/app/models/user.rb
index 9c55bc59e..da1c3ab8d 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,5 +1,5 @@
 class User < ActiveRecord::Base
-  devise :database_authenticatable, :registerable,
+  devise :database_authenticatable, :registerable, :confirmable,
          :recoverable, :rememberable, :trackable, :validatable
 
   def name
diff --git a/config/environments/development.rb b/config/environments/development.rb
index e9d8fdb80..63168eb28 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -17,6 +17,9 @@ Rails.application.configure do
   config.action_mailer.raise_delivery_errors = false
   config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
 
+  # Deliver emails to a development mailbox at /letter_opener
+  config.action_mailer.delivery_method = :letter_opener
+
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
 
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 1c19f08b2..34034499f 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -30,6 +30,10 @@ Rails.application.configure do
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
+  config.action_mailer.default_url_options = {
+    host: 'test'
+  }
+  config.action_mailer.asset_host = 'http://madrid.test'
 
   # Randomize the order test cases are executed.
   config.active_support.test_order = :random
diff --git a/config/routes.rb b/config/routes.rb
index f5afd988c..cd95b8461 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -61,4 +61,8 @@ Rails.application.routes.draw do
   #     # (app/controllers/admin/products_controller.rb)
   #     resources :products
   #   end
+
+  if Rails.env.development?
+    mount LetterOpenerWeb::Engine, at: "/letter_opener"
+  end
 end
diff --git a/db/migrate/20150731110702_add_confirmable_to_devise_for_users.rb b/db/migrate/20150731110702_add_confirmable_to_devise_for_users.rb
new file mode 100644
index 000000000..c6b4310e6
--- /dev/null
+++ b/db/migrate/20150731110702_add_confirmable_to_devise_for_users.rb
@@ -0,0 +1,13 @@
+class AddConfirmableToDeviseForUsers < ActiveRecord::Migration
+  def change
+    # Confirmable
+    add_column :users, :confirmation_token, :string
+    add_column :users, :confirmed_at, :datetime
+    add_column :users, :confirmation_sent_at, :datetime
+
+    # Reconfirmable
+    add_column :users, :unconfirmed_email, :string
+
+    add_index :users, :confirmation_token, unique: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 1a32c61a7..237be8c85 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,10 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150718091702) do
+ActiveRecord::Schema.define(version: 20150731110702) do
+
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
 
   create_table "comments", force: :cascade do |t|
     t.integer  "commentable_id"
@@ -27,8 +30,8 @@ ActiveRecord::Schema.define(version: 20150718091702) do
     t.datetime "updated_at"
   end
 
-  add_index "comments", ["commentable_id", "commentable_type"], name: "index_comments_on_commentable_id_and_commentable_type"
-  add_index "comments", ["user_id"], name: "index_comments_on_user_id"
+  add_index "comments", ["commentable_id", "commentable_type"], name: "index_comments_on_commentable_id_and_commentable_type", using: :btree
+  add_index "comments", ["user_id"], name: "index_comments_on_user_id", using: :btree
 
   create_table "debates", force: :cascade do |t|
     t.string   "title"
@@ -48,15 +51,15 @@ ActiveRecord::Schema.define(version: 20150718091702) do
     t.datetime "created_at"
   end
 
-  add_index "taggings", ["tag_id"], name: "index_taggings_on_tag_id"
-  add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
+  add_index "taggings", ["tag_id"], name: "index_taggings_on_tag_id", using: :btree
+  add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context", using: :btree
 
   create_table "tags", force: :cascade do |t|
     t.string  "name"
     t.integer "taggings_count", default: 0
   end
 
-  add_index "tags", ["name"], name: "index_tags_on_name", unique: true
+  add_index "tags", ["name"], name: "index_tags_on_name", unique: true, using: :btree
 
   create_table "users", force: :cascade do |t|
     t.string   "email",                  default: "", null: false
@@ -73,10 +76,15 @@ ActiveRecord::Schema.define(version: 20150718091702) do
     t.datetime "updated_at",                          null: false
     t.string   "first_name"
     t.string   "last_name"
+    t.string   "confirmation_token"
+    t.datetime "confirmed_at"
+    t.datetime "confirmation_sent_at"
+    t.string   "unconfirmed_email"
   end
 
-  add_index "users", ["email"], name: "index_users_on_email", unique: true
-  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
+  add_index "users", ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true, using: :btree
+  add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
+  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
 
   create_table "votes", force: :cascade do |t|
     t.integer  "votable_id"
@@ -90,7 +98,7 @@ ActiveRecord::Schema.define(version: 20150718091702) do
     t.datetime "updated_at"
   end
 
-  add_index "votes", ["votable_id", "votable_type", "vote_scope"], name: "index_votes_on_votable_id_and_votable_type_and_vote_scope"
-  add_index "votes", ["voter_id", "voter_type", "vote_scope"], name: "index_votes_on_voter_id_and_voter_type_and_vote_scope"
+  add_index "votes", ["votable_id", "votable_type", "vote_scope"], name: "index_votes_on_votable_id_and_votable_type_and_vote_scope", using: :btree
+  add_index "votes", ["voter_id", "voter_type", "vote_scope"], name: "index_votes_on_voter_id_and_voter_type_and_vote_scope", using: :btree
 
 end
diff --git a/spec/factories.rb b/spec/factories.rb
index 9e9ab2d0a..65315a112 100644
--- a/spec/factories.rb
+++ b/spec/factories.rb
@@ -5,6 +5,7 @@ FactoryGirl.define do
     last_name        'Carmena'
     sequence(:email) { |n| "manuela#{n}@madrid.es" }
     password         'judgmentday'
+    confirmed_at     { Time.now }
   end
 
   factory :debate do
@@ -19,7 +20,7 @@ FactoryGirl.define do
     association :voter, factory: :user
     vote_flag true
   end
-  
+
   factory :comment do
     commentable
     user
diff --git a/spec/features/users_spec.rb b/spec/features/users_spec.rb
index 2d972e87f..92f30ea91 100644
--- a/spec/features/users_spec.rb
+++ b/spec/features/users_spec.rb
@@ -14,7 +14,7 @@ feature 'Users' do
 
     click_button 'Sign up'
 
-    expect(page).to have_content 'Welcome! You have signed up successfully.'
+    expect(page).to have_content "A message with a confirmation link has been sent to your email address. Please follow the link to activate your account."
   end
 
   scenario 'Sign in' do