diff --git a/app/controllers/mailer_controller.rb b/app/controllers/mailer_controller.rb
index 6f39a9f6..19e8eaba 100644
--- a/app/controllers/mailer_controller.rb
+++ b/app/controllers/mailer_controller.rb
@@ -1,4 +1,6 @@
 class MailerController < ApplicationController
+  load_and_authorize_resource class: Message
+
   def new
     @users = Array(params[:user])
     @emails = User.where(:username => @users).all.map(&:email)
diff --git a/spec/controllers/mailer_controller_spec.rb b/spec/controllers/mailer_controller_spec.rb
index 788e28ce..c65b252a 100644
--- a/spec/controllers/mailer_controller_spec.rb
+++ b/spec/controllers/mailer_controller_spec.rb
@@ -3,18 +3,58 @@
 describe MailerController do
   let(:user) { Fabricate(:user) }
   let(:users) { Fabricate.sequence(:user, 5)}
+  let(:diffusion) { Fabricate.build(:diffusion) }
+
+  shared_examples 'unauthorized' do
+    it 'redirects to the login page' do
+      response.should redirect_to(login_path)
+    end
+  end
 
   describe "GET 'new' for a single user email" do
-    it "returns http success" do
-      get :new, user: Array(user)
-      response.should be_success
+
+    context 'when user is a moderator' do
+      before { sign_in Fabricate(:user, moderator: true) }
+      it "returns http success" do
+        get :new, user: Array(user)
+        response.should be_success
+      end
+    end
+
+    context 'when user is not a moderator' do
+      before do
+        sign_in Fabricate(:user)
+        get :new, user: Array(user)
+      end
+      it_behaves_like 'unauthorized'
+    end
+
+    context 'when user is a guest' do
+      before { get :new, user: Array(user) }
+      it_behaves_like 'unauthorized'
     end
   end
 
   describe "GET 'new' for a diffusion" do
-    it "returns http success" do
-      get :new, user: Array(users)
-      response.should be_success
+    context 'when user is a moderator' do
+      before { sign_in Fabricate(:user, moderator: true) }
+      it "returns http success" do
+        get :new, user: Array(users)
+        response.should be_success
+      end
+    end
+
+    context 'when user is not a moderator' do
+      before do
+        sign_in Fabricate(:user)
+        get :new, user: Array(users)
+      end
+      it_behaves_like 'unauthorized'
+    end
+
+    context 'when user is a guest' do
+      before { get :new, user: Array(users) }
+      it_behaves_like 'unauthorized'
     end
   end
 
@@ -23,37 +63,68 @@
       @message = Fabricate.build(:message)
     end
 
-    it 'delivers the email' do
-      expect {
-        post :create, message: @message
-      }.to change {ActionMailer::Base.deliveries.size}.by(1)
+    context 'when user is a moderator' do
+      before { sign_in Fabricate(:user, moderator: true) }
+      it 'delivers the email' do
+        expect {
+          post :create, message: @message
+        }.to change {ActionMailer::Base.deliveries.size}.by(1)
+      end
+
+      describe 'delivered message' do
+        before :each do
+          post :create, message: @message
+        end
+
+        it "returns http success" do
+          response.should be_redirect
+        end
+
+        it 'delivers the mail with the subject that we wanted to' do
+          ActionMailer::Base.deliveries.last.subject.should == @message.subject
+        end
+
+        it 'delivers the mail with the body that we wanted to' do
+          ActionMailer::Base.deliveries.last.body.to_s.should match @message.body
+        end
+      end
     end
 
-    describe 'delivered message' do
-      before :each do
+    context 'when user is not a moderator' do
+      before do
+        sign_in Fabricate(:user)
         post :create, message: @message
       end
+      it_behaves_like 'unauthorized'
+    end
 
-      it "returns http success" do
-        response.should be_redirect
-      end
+    context 'when user is a guest' do
+      before { post :create, message: @message }
+      it_behaves_like 'unauthorized'
+    end
+  end
 
-      it 'delivers the mail with the subject that we wanted to' do
-        ActionMailer::Base.deliveries.last.subject.should == @message.subject
+  describe "POST 'create' for a diffusion" do
+    context 'when user is a moderator' do
+      before { sign_in Fabricate(:user, moderator: true) }
+      it "returns http success" do
+        expect {
+          post 'create', message: diffusion
+        }.to change {ActionMailer::Base.deliveries.size}.by(diffusion.email.size)
       end
+    end
 
-      it 'delivers the mail with the body that we wanted to' do
-        ActionMailer::Base.deliveries.last.body.to_s.should match @message.body
+    context 'when user is not a moderator' do
+      before do
+        sign_in Fabricate(:user)
+        post :create, message: diffusion
       end
+      it_behaves_like 'unauthorized'
     end
-  end
 
-  describe "POST 'create' for a diffusion" do
-    it "returns http success" do
-      @diffusion = Fabricate.build(:diffusion)
-      expect {
-        post 'create', message: @diffusion
-      }.to change {ActionMailer::Base.deliveries.size}.by(@diffusion.email.size)
+    context 'when user is a guest' do
+      before { post :create, message: diffusion }
+      it_behaves_like 'unauthorized'
     end
   end
 end