diff --git a/.dockerignore b/.dockerignore
index 7590b84..cb8967a 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -4,3 +4,4 @@
 !app
 !bootstrap
 !config
+!services
diff --git a/.env.example b/.env.example
index 145b9f1..94f3dc4 100644
--- a/.env.example
+++ b/.env.example
@@ -11,3 +11,9 @@ DB_PORT=27017
 DB_NAME=
 DB_USERNAME=arrecadar
 DB_PASSWORD=secret
+
+MAIL_PORT=
+MAIL_HOST=
+MAIL_USERNAME=
+MAIL_PASSWORD=
+MAIL_SENDER=
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 182aa42..7b36e82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,6 @@
 # CHANGE LOG
 
 ## Unreleased
-- [ ] Auth: add token refresh
-- [ ] Register: add email validations
-- [ ] Resources: add paginations
-- [ ] Resources: index routes return `error not found` when needs to return `{ data: [] }`
 
 ### Add
 - [x] Users.
@@ -15,9 +11,9 @@
   - [x] Login with email and password.
   - [x] JWT authorization.
   - [ ] Token Refresh
-- [ ] Register
-  - When register send an email confirmation.
-- [ ] resources: add pagination.
+- [x] Register
+  - [x] When register send an email confirmation.
+- [ ] Resources: add pagination.
 - [x] Added public routes
   - [x] GET /ongs
   - [x] GET /ongs/:id
diff --git a/Dockerfile b/Dockerfile
index b7c4882..8b35d2a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,7 @@ COPY ./server.js /api/server.js
 COPY ./app /api/app
 COPY ./bootstrap /api/bootstrap
 COPY ./config /api/config
+COPY ./services /api/services
 
 WORKDIR /api
 
diff --git a/app/Authentication/controller.js b/app/Authentication/controller.js
index 3ab60a2..d85b477 100644
--- a/app/Authentication/controller.js
+++ b/app/Authentication/controller.js
@@ -1,5 +1,8 @@
 const passport = require('passport')
-const { handleUnauthorized } = require('../Responses')
+const Token = require('./token')
+const trasnformUser = require('../Transformers/user')
+const UserRepository = require('../Users/repository')
+const { handleUnauthorized, handleResponse } = require('../Responses')
 
 const login = (request, response) => (
   passport.authenticate('local', (error, user) => {
@@ -13,6 +16,16 @@ const login = (request, response) => (
   })(request, response)
 )
 
+const confirmation = (request, response) => {
+  const { user } = Token.decode(request.query.token, ['user'])
+
+  UserRepository
+    .save(user, { activated: true })
+    .then(trasnformUser.withToken)
+    .then(handleResponse(response))
+}
+
 module.exports = {
-  login
+  login,
+  confirmation
 }
diff --git a/app/Authentication/routes.js b/app/Authentication/routes.js
index 280bfb6..3069a65 100644
--- a/app/Authentication/routes.js
+++ b/app/Authentication/routes.js
@@ -2,5 +2,6 @@ const Router = require('express').Router()
 const controller = require('./controller')
 
 Router.post('/login', controller.login)
+Router.get('/confirmation', controller.confirmation)
 
 module.exports = Router
diff --git a/app/Authentication/token.js b/app/Authentication/token.js
new file mode 100644
index 0000000..2bb747d
--- /dev/null
+++ b/app/Authentication/token.js
@@ -0,0 +1,14 @@
+const jwt = require('jsonwebtoken')
+const { key } = require('../../config/app')
+
+const create = (data, expiresIn) => jwt.sign(data, key, {
+  expiresIn,
+  algorithm: 'HS256'
+})
+
+const decode = token => jwt.decode(token)
+
+module.exports = {
+  create: create,
+  decode: decode
+}
diff --git a/app/Organizations/routes.js b/app/Organizations/routes.js
index 4823211..fa27e69 100644
--- a/app/Organizations/routes.js
+++ b/app/Organizations/routes.js
@@ -4,7 +4,7 @@ const { authorizeWithJwt } = require('../Authentication/middleware')
 const controller = require('./controller')
 const request = require('./request')
 
-Router.get('/', authorizeWithJwt, controller.index)
+Router.get('/', controller.index)
 Router.get('/:id', controller.show)
 Router.put('/:id', authorizeWithJwt, controller.save)
 Router.post('/', authorizeWithJwt, request, controller.store)
diff --git a/app/Responses.js b/app/Responses.js
index 9c2327b..6c47aed 100644
--- a/app/Responses.js
+++ b/app/Responses.js
@@ -23,7 +23,7 @@ const handleResponse = response => result =>
 const handleError = response => error =>
   error.kind === 'ObjectId'
     ? notFound(response)
-    : responseWithInternalServerError(response)
+    : responseWithInternalServerError(response)(error)
 
 const handleUnauthorized = response => (
   response.status(401).json({
diff --git a/app/Transformers/user.js b/app/Transformers/user.js
new file mode 100644
index 0000000..b9a5cfb
--- /dev/null
+++ b/app/Transformers/user.js
@@ -0,0 +1,30 @@
+const { applySpec, prop } = require('ramda')
+const Token = require('../Authentication/token')
+
+const createUsertToken = ({ id }) => Token.create({ user: id }, '15min')
+
+const withToken = applySpec({
+  data: {
+    id: prop('id'),
+    name: prop('name'),
+    email: prop('email'),
+    token: createUsertToken,
+    created_at: prop('created_at'),
+    updated_at: prop('updated_at')
+  }
+})
+
+const transform = applySpec({
+  data: {
+    id: prop('id'),
+    name: prop('name'),
+    email: prop('email'),
+    created_at: prop('created_at'),
+    updated_at: prop('updated_at')
+  }
+})
+
+module.exports = {
+  withToken,
+  transform
+}
diff --git a/app/Users/controller.js b/app/Users/controller.js
index fbd0e1f..05cb69b 100644
--- a/app/Users/controller.js
+++ b/app/Users/controller.js
@@ -1,10 +1,9 @@
-const {
-  Controller,
-  Transform
-} = require('@anarklab/expressive-controller')
+const { Controller, Transform } = require('@anarklab/expressive-controller')
+const Repository = require('./repository')
+const SendEmail = require('../../services/mail/send')
+const { transform: transformUser } = require('../Transformers/user')
 const { handleError, handleResponse } = require('../Responses')
 
-const Repository = require('./repository')
 const controller = Controller(Repository)
 
 const show = (request, response) => {
@@ -17,7 +16,20 @@ const show = (request, response) => {
     .catch(handleError(response))
 }
 
+const store = (request, response) => {
+  Repository
+    .create(request.body)
+    .then(user => {
+      SendEmail.confirmation(user)
+      return user
+    })
+    .then(transformUser)
+    .then(handleResponse(response))
+    .catch(error => handleError(response)([error.message]))
+}
+
 module.exports = {
   ...controller,
-  show
+  show,
+  store
 }
diff --git a/app/Users/model.js b/app/Users/model.js
index ad72213..1843fc0 100644
--- a/app/Users/model.js
+++ b/app/Users/model.js
@@ -16,6 +16,10 @@ const UserScheme = new Schema({
     type: String,
     required: true,
     select: false
+  },
+  activated: {
+    type: Boolean,
+    default: false
   }
 }, {
   timestamps: {
diff --git a/app/Users/repository.js b/app/Users/repository.js
index ee0517e..f5b5bf4 100644
--- a/app/Users/repository.js
+++ b/app/Users/repository.js
@@ -11,7 +11,7 @@ const handleSaveErrors = error => {
 const find = () => User.find()
 const findOne = id => User.findById(id)
 const create = user => new User(user).save().catch(handleSaveErrors)
-const save = (id, data) => User.findByIdAndUpdate(id, data).catch(handleSaveErrors)
+const save = (id, data) => User.findByIdAndUpdate(id, data, {new: true}).catch(handleSaveErrors)
 const remove = id => User.findByIdAndRemove(id)
 
 module.exports = {
diff --git a/app/Users/routes.js b/app/Users/routes.js
index 0f15bf6..daf04d3 100644
--- a/app/Users/routes.js
+++ b/app/Users/routes.js
@@ -6,5 +6,6 @@ const request = require('./request')
 
 Router.get('/:id', authorizeWithJwt, users.show)
 Router.post('/', request, users.store)
+Router.get('/', authorizeWithJwt, users.index)
 
 module.exports = Router
diff --git a/bootstrap/strategies/local.js b/bootstrap/strategies/local.js
index 5f69d52..94b71f4 100644
--- a/bootstrap/strategies/local.js
+++ b/bootstrap/strategies/local.js
@@ -6,7 +6,7 @@ const { key } = require('../../config/app')
 
 const auth = (email, password, done) => (
   User
-    .findOne({ email })
+    .findOne({ email, activated: true })
     .select('+password')
     .then(validatePasswordAndGetUser(password))
     .then(transformUser)
diff --git a/config/mail.js b/config/mail.js
new file mode 100644
index 0000000..c9ee883
--- /dev/null
+++ b/config/mail.js
@@ -0,0 +1,7 @@
+module.exports = {
+  host: process.env.MAIL_HOST,
+  port: process.env.MAIL_PORT,
+  username: process.env.MAIL_USERNAME,
+  password: process.env.MAIL_PASSWORD,
+  sender: process.env.MAIL_SENDER
+}
diff --git a/docker-compose.yml b/docker-compose.yml
index 99e0da7..c9531c7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,6 +24,7 @@ services:
       - ./app:/api/app
       - ./bootstrap:/api/bootstrap
       - ./config:/api/config
+      - ./services:/api/services
 
   base-tests:
     extends: base
diff --git a/package.json b/package.json
index c298198..4be5311 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,7 @@
     "jsonwebtoken": "^8.2.1",
     "mongoose-paginate": "^5.0.3",
     "morgan": "^1.9.0",
+    "nodemailer": "^4.6.5",
     "passport": "^0.4.0",
     "passport-jwt": "^4.0.0",
     "passport-local": "^1.0.0",
diff --git a/services/mail/index.js b/services/mail/index.js
new file mode 100644
index 0000000..edf1c93
--- /dev/null
+++ b/services/mail/index.js
@@ -0,0 +1,34 @@
+const nodemailer = require('nodemailer')
+const {
+  host,
+  username,
+  password,
+  sender
+} = require('../../config/mail')
+
+const transporter = nodemailer.createTransport({
+  service: host,
+  auth: {
+    user: username,
+    pass: password
+  }
+})
+
+const defaultMailOptions = {
+  from: sender
+}
+
+const dispatch = mail => transporter.sendMail({
+  ...defaultMailOptions,
+  ...mail
+}, error => {
+  if (error) {
+    throw error
+  }
+
+  return true
+})
+
+module.exports = {
+  dispatch
+}
diff --git a/services/mail/send.js b/services/mail/send.js
new file mode 100644
index 0000000..5152833
--- /dev/null
+++ b/services/mail/send.js
@@ -0,0 +1,20 @@
+const Token = require('../../app/Authentication/token')
+const Mail = require('./index')
+
+const confirmation = user => {
+  const token = Token.create({ user: user.id }, '1day')
+  const mail = {
+    to: user.email,
+    subject: 'Confirme seu cadastro',
+    html: `
+      <h3>Olá ${user.name}.</h3>
+      <p>Você pode confirmar seu registro accesando este <a href="http://localhost:3000/confirmation?token=${token}">link.</a></p>
+    `
+  }
+
+  return Mail.dispatch(mail)
+}
+
+module.exports = {
+  confirmation
+}
diff --git a/yarn.lock b/yarn.lock
index cdd35ac..327da23 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3255,6 +3255,10 @@ node-pre-gyp@^0.6.39:
     tar "^2.2.1"
     tar-pack "^3.4.0"
 
+nodemailer@^4.6.5:
+  version "4.6.5"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-4.6.5.tgz#306ce18c4543f3f06e5f76665d3cb6277f872f53"
+
 nodemon@^1.14.12:
   version "1.17.3"
   resolved "https://registry.yarnpkg.com/nodemon/-/nodemon-1.17.3.tgz#3b0bbc2ee05ccb43b1aef15ba05c63c7bc9b8530"