diff --git a/config.template.yml b/config.template.yml
index 8c58243a1..d514ba316 100644
--- a/config.template.yml
+++ b/config.template.yml
@@ -1,20 +1,33 @@
 
-debug_level: info
+### Level of verbosity for logs
+logs_level: info
 
+### Configuration of your LDAP
 ldap:
   url: ldap://ldap
   base_dn: ou=users,dc=example,dc=com
   user: cn=admin,dc=example,dc=com
   password: password
 
+### Configuration of session cookies
 session:
   secret: unsecure_secret
   expiration: 3600000
 
-store_directory: /var/lib/auth-server
+### The directory where the DB files will be saved
+store_directory: /var/lib/auth-server/store
 
+
+### Notifications are sent to users when they require a password reset, a u2f
+### registration or a TOTP registration.
+### Use only one available configuration: filesystem, gmail
 notifier:
-  gmail:
-    username: user@example.com
-    password: yourpassword
+  ### For testing purpose, notifications can be sent in a file
+  filesystem:
+    filename: /var/lib/auth-server/notifications/notification.txt
+
+  ### Use your gmail account to send the notifications. You can use an app password.
+  # gmail:
+  #   username: user@example.com
+  #   password: yourpassword
   
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index 2352c93fc..980ec7c77 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -6,6 +6,7 @@ services:
       - ./test:/usr/src/test
       - ./src/views:/usr/src/views
       - ./src/public_html:/usr/src/public_html
+      - ./notifications:/var/lib/auth-server/notifications
 
   ldap-admin:
     image: osixia/phpldapadmin:0.6.11
diff --git a/notifications/notification.txt b/notifications/notification.txt
new file mode 100644
index 000000000..19ff68363
--- /dev/null
+++ b/notifications/notification.txt
@@ -0,0 +1,3 @@
+User: user
+Subject: Reset your password
+Link: https://localhost:8080/authentication/reset-password?identity_token=CmJ51IdJLEcVr7AbbJPANe0wmJoOcgYzPqgGOngVRIhKq1UbQUoS44FXDEXBcolz
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index 8755e490e..4717ff2ec 100644
--- a/src/index.js
+++ b/src/index.js
@@ -23,13 +23,12 @@ var config = {
   session_secret: yaml_config.session.secret,
   session_max_age: yaml_config.session.expiration || 3600000, // in ms
   store_directory: yaml_config.store_directory,
-  debug_level: yaml_config.debug_level,
-  gmail: {
-    user: yaml_config.notifier.gmail.username,
-    pass: yaml_config.notifier.gmail.password
-  }
+  logs_level: yaml_config.logs_level,
+  notifier: yaml_config.notifier,
 }
 
+console.log(config);
+
 var ldap_client = ldap.createClient({
   url: config.ldap_url,
   reconnect: true
diff --git a/src/lib/email_sender.js b/src/lib/email_sender.js
deleted file mode 100644
index 8f25e841c..000000000
--- a/src/lib/email_sender.js
+++ /dev/null
@@ -1,25 +0,0 @@
-
-module.exports = EmailSender;
-
-var Promise = require('bluebird');
-
-function EmailSender(nodemailer, options) {
-  var transporter = nodemailer.createTransport({
-    service: 'gmail',
-    auth: {
-      user: options.gmail.user,
-      pass: options.gmail.pass
-    }
-  });
-  this.transporter = Promise.promisifyAll(transporter);
-}
-
-EmailSender.prototype.send = function(to, subject, html) {
-  var mailOptions = {};
-  mailOptions.from = 'auth-server@open-intent.io';
-  mailOptions.to = to;
-  mailOptions.subject = subject;
-  mailOptions.html = html;
-  return this.transporter.sendMailAsync(mailOptions);
-}
-
diff --git a/src/lib/identity_check.js b/src/lib/identity_check.js
index bd1550d28..1b37c28b1 100644
--- a/src/lib/identity_check.js
+++ b/src/lib/identity_check.js
@@ -14,13 +14,12 @@ var email_template = fs.readFileSync(filePath, 'utf8');
 
 // IdentityCheck class
 
-function IdentityCheck(user_data_store, email_sender, logger) {
+function IdentityCheck(user_data_store, logger) {
   this._user_data_store = user_data_store;
-  this._email_sender = email_sender;
   this._logger = logger;
 }
 
-IdentityCheck.prototype.issue_token = function(userid, email, content, logger) {
+IdentityCheck.prototype.issue_token = function(userid, content, logger) {
   var five_minutes = 4 * 60 * 1000;
   var token = randomstring.generate({ length: 64 });
   var that = this;
@@ -61,7 +60,7 @@ function identity_check_get(endpoint, icheck_interface) {
  
     var email_sender = req.app.get('email sender');
     var user_data_store = req.app.get('user data store');
-    var identity_check = new IdentityCheck(user_data_store, email_sender, logger);
+    var identity_check = new IdentityCheck(user_data_store, logger);
 
     identity_check.consume_token(identity_token, logger)
     .then(function(content) {
@@ -90,15 +89,16 @@ function identity_check_get(endpoint, icheck_interface) {
 function identity_check_post(endpoint, icheck_interface) {
   return function(req, res) {
     var logger = req.app.get('logger');
-    var email_sender = req.app.get('email sender');
+    var notifier = req.app.get('notifier');
     var user_data_store = req.app.get('user data store');
-    var identity_check = new IdentityCheck(user_data_store, email_sender, logger);
-    var userid, email_address;
+    var identity_check = new IdentityCheck(user_data_store, logger);
+    var identity;
 
     icheck_interface.pre_check_callback(req)
-    .then(function(identity) {
-      email_address = objectPath.get(identity, 'email');
-      userid = objectPath.get(identity, 'userid');
+    .then(function(id) {
+      identity = id;
+      var email_address = objectPath.get(identity, 'email');
+      var userid = objectPath.get(identity, 'userid');
 
       if(!(email_address && userid)) {
         throw new exceptions.IdentityError('Missing user id or email address');
@@ -111,19 +111,9 @@ function identity_check_post(endpoint, icheck_interface) {
     .then(function(token) {
       var original_url = util.format('https://%s%s', req.headers.host, req.headers['x-original-uri']);
       var link_url = util.format('%s?identity_token=%s', original_url, token); 
-      var email = {};
 
-      var d = {};
-      d.url = link_url;
-      d.button_title = 'Continue';
-      d.title = icheck_interface.email_subject;
-
-      email.to = email_address;
-      email.subject = icheck_interface.email_subject;
-      email.content = ejs.render(email_template, d);
-
-      logger.info('POST identity_check: send email to %s', email.to);
-      return email_sender.send(email.to, email.subject, email.content);
+      logger.info('POST identity_check: notify to %s', identity.userid);
+      return notifier.notify(identity, icheck_interface.email_subject, link_url);
     })
     .then(function() {
       res.status(204);
diff --git a/src/lib/notifier.js b/src/lib/notifier.js
new file mode 100644
index 000000000..84ba60600
--- /dev/null
+++ b/src/lib/notifier.js
@@ -0,0 +1,24 @@
+
+module.exports = Notifier;
+
+var GmailNotifier = require('./notifiers/gmail.js');
+var FSNotifier = require('./notifiers/filesystem.js');
+
+function notifier_factory(options, deps) {
+  if('gmail' in options) {
+    return new GmailNotifier(options.gmail, deps);
+  }
+  else if('filesystem' in options) {
+    return new FSNotifier(options.filesystem);
+  }
+}
+
+function Notifier(options, deps) {
+  this._notifier = notifier_factory(options, deps);
+}
+
+Notifier.prototype.notify = function(identity, subject, link) {
+  return this._notifier.notify(identity, subject, link); 
+}
+
+
diff --git a/src/lib/notifiers/filesystem.js b/src/lib/notifiers/filesystem.js
new file mode 100644
index 000000000..a4a295ce2
--- /dev/null
+++ b/src/lib/notifiers/filesystem.js
@@ -0,0 +1,16 @@
+module.exports = FSNotifier;
+
+var Promise = require('bluebird');
+var fs = Promise.promisifyAll(require('fs'));
+var util = require('util');
+
+function FSNotifier(options) {
+  this._filename = options.filename;
+}
+
+FSNotifier.prototype.notify = function(identity, subject, link) {
+  var content = util.format('User: %s\nSubject: %s\nLink: %s', identity.userid,
+    subject, link); 
+  return fs.writeFileAsync(this._filename, content);
+}
+
diff --git a/src/lib/notifiers/gmail.js b/src/lib/notifiers/gmail.js
new file mode 100644
index 000000000..5007d858c
--- /dev/null
+++ b/src/lib/notifiers/gmail.js
@@ -0,0 +1,33 @@
+module.exports = GmailNotifier;
+
+var Promise = require('bluebird');
+var fs = require('fs');
+var ejs = require('ejs');
+
+var email_template = fs.readFileSync(__dirname + '/../../resources/email-template.ejs', 'UTF-8');
+
+function GmailNotifier(options, deps) {
+  var transporter = deps.nodemailer.createTransport({
+    service: 'gmail',
+    auth: {
+      user: options.username,
+      pass: options.password
+    }
+  });
+  this.transporter = Promise.promisifyAll(transporter);
+}
+
+GmailNotifier.prototype.notify = function(identity, subject, link) {
+  var d = {};
+  d.url = link;
+  d.button_title = 'Continue';
+  d.title = subject;
+
+  var mailOptions = {};
+  mailOptions.from = 'auth-server@open-intent.io';
+  mailOptions.to = identity.email;
+  mailOptions.subject = subject;
+  mailOptions.html = ejs.render(email_template, d);
+  return this.transporter.sendMailAsync(mailOptions);
+}
+
diff --git a/src/lib/server.js b/src/lib/server.js
index 84e8187aa..399ab1449 100644
--- a/src/lib/server.js
+++ b/src/lib/server.js
@@ -12,7 +12,7 @@ var path = require('path');
 var session = require('express-session');
 var winston = require('winston');
 var UserDataStore = require('./user_data_store');
-var EmailSender = require('./email_sender');
+var Notifier = require('./notifier');
 var AuthenticationRegulator = require('./authentication_regulator');
 var identity_check = require('./identity_check');
 
@@ -24,9 +24,6 @@ function run(config, ldap_client, deps, fn) {
   if(config.store_in_memory)
     datastore_options.inMemory = true;
 
-  var email_options = {};
-  email_options.gmail = config.gmail;
-
   var app = express();
   app.use(express.static(public_html_directory));
   app.use(bodyParser.urlencoded({ extended: false }));
@@ -46,12 +43,13 @@ function run(config, ldap_client, deps, fn) {
   app.set('views', view_directory);
   app.set('view engine', 'ejs');
 
-  winston.level = config.debug_level || 'info';
+  // by default the level of logs is info
+  winston.level = config.logs_level || 'info';
 
   var five_minutes = 5 * 60;
   var data_store = new UserDataStore(deps.nedb, datastore_options);
   var regulator = new AuthenticationRegulator(data_store, five_minutes);
-  var notifier = new EmailSender(deps.nodemailer, email_options);
+  var notifier = new Notifier(config.notifier, deps);
 
   app.set('logger', winston);
   app.set('ldap', deps.ldap);
@@ -59,7 +57,7 @@ function run(config, ldap_client, deps, fn) {
   app.set('totp engine', speakeasy);
   app.set('u2f', deps.u2f);
   app.set('user data store', data_store);
-  app.set('email sender', notifier);
+  app.set('notifier', notifier);
   app.set('authentication regulator', regulator);
   app.set('config', config);
 
@@ -88,9 +86,11 @@ function run(config, ldap_client, deps, fn) {
   app.post (base_endpoint + '/1stfactor',        routes.first_factor);
   app.post (base_endpoint + '/2ndfactor/totp',   routes.second_factor.totp);
 
+  // U2F registration
   app.get  (base_endpoint + '/2ndfactor/u2f/register_request',   routes.second_factor.u2f.register_request);
   app.post (base_endpoint + '/2ndfactor/u2f/register',           routes.second_factor.u2f.register);
 
+  // U2F authentication
   app.get  (base_endpoint + '/2ndfactor/u2f/sign_request',       routes.second_factor.u2f.sign_request);
   app.post (base_endpoint + '/2ndfactor/u2f/sign',               routes.second_factor.u2f.sign);
   
diff --git a/test/unitary/notifiers/test_fs.js b/test/unitary/notifiers/test_fs.js
new file mode 100644
index 000000000..60b16b8ec
--- /dev/null
+++ b/test/unitary/notifiers/test_fs.js
@@ -0,0 +1,37 @@
+var sinon = require('sinon');
+var assert = require('assert');
+var FSNotifier = require('../../../src/lib/notifiers/filesystem');
+var tmp = require('tmp');
+var fs = require('fs');
+
+describe('test FS notifier', function() {
+  var tmpDir;
+  before(function() {
+    tmpDir = tmp.dirSync({ unsafeCleanup: true });
+  });
+
+  after(function() {
+    tmpDir.removeCallback();
+  });
+
+  it('should write the notification in a file', function() {
+    var options = {};
+    options.filename = tmpDir.name + '/notification';
+
+    var sender = new FSNotifier(options);
+    var subject = 'subject';
+
+    var identity = {};
+    identity.userid = 'user';
+    identity.email = 'user@example.com';
+
+    var url = 'http://test.com';
+
+    return sender.notify(identity, subject, url)
+    .then(function() {
+      var content = fs.readFileSync(options.filename, 'UTF-8');
+      assert(content.length > 0);
+      return Promise.resolve();
+    });
+  });
+});
diff --git a/test/unitary/notifiers/test_gmail.js b/test/unitary/notifiers/test_gmail.js
new file mode 100644
index 000000000..bc65967a0
--- /dev/null
+++ b/test/unitary/notifiers/test_gmail.js
@@ -0,0 +1,36 @@
+var sinon = require('sinon');
+var assert = require('assert');
+var GmailNotifier = require('../../../src/lib/notifiers/gmail');
+
+describe('test gmail notifier', function() {
+  it('should send an email', function() {
+    var nodemailer = {};
+    var transporter = {};
+    nodemailer.createTransport = sinon.stub().returns(transporter);
+    transporter.sendMail = sinon.stub().yields();
+    var options = {};
+    options.username = 'user_gmail';
+    options.password = 'pass_gmail';
+
+    var deps = {};
+    deps.nodemailer = nodemailer;
+    
+    var sender = new GmailNotifier(options, deps);
+    var subject = 'subject';
+
+    var identity = {};
+    identity.userid = 'user';
+    identity.email = 'user@example.com';
+
+    var url = 'http://test.com';
+
+    return sender.notify(identity, subject, url)
+    .then(function() {
+      assert.equal(nodemailer.createTransport.getCall(0).args[0].auth.user, 'user_gmail');
+      assert.equal(nodemailer.createTransport.getCall(0).args[0].auth.pass, 'pass_gmail');
+      assert.equal(transporter.sendMail.getCall(0).args[0].to, 'user@example.com');
+      assert.equal(transporter.sendMail.getCall(0).args[0].subject, 'subject');
+      return Promise.resolve();
+    });
+  });
+});
diff --git a/test/unitary/notifiers/test_notifier.js b/test/unitary/notifiers/test_notifier.js
new file mode 100644
index 000000000..efa4413db
--- /dev/null
+++ b/test/unitary/notifiers/test_notifier.js
@@ -0,0 +1,35 @@
+
+var sinon = require('sinon');
+var Promise = require('bluebird');
+var assert = require('assert');
+
+var Notifier = require('../../../src/lib/notifier');
+var GmailNotifier = require('../../../src/lib/notifiers/gmail');
+var FSNotifier = require('../../../src/lib/notifiers/filesystem');
+
+describe('test notifier', function() {
+  it('should build a Gmail Notifier', function() {
+    var deps = {};
+    deps.nodemailer = {};
+    deps.nodemailer.createTransport = sinon.stub().returns({});
+
+    var options = {};
+    options.gmail = {};
+    options.gmail.user = 'abc';
+    options.gmail.pass = 'abcd';
+
+    var notifier = new Notifier(options, deps);
+    assert(notifier._notifier instanceof GmailNotifier);
+  });
+
+  it('should build a FS Notifier', function() {
+    var deps = {};
+
+    var options = {};
+    options.filesystem = {};
+    options.filesystem.filename = 'abc';
+
+    var notifier = new Notifier(options, deps);
+    assert(notifier._notifier instanceof FSNotifier);
+  });
+});
diff --git a/test/unitary/test_data_persistence.js b/test/unitary/test_data_persistence.js
index 072f9c361..202641040 100644
--- a/test/unitary/test_data_persistence.js
+++ b/test/unitary/test_data_persistence.js
@@ -57,7 +57,7 @@ describe('test data persistence', function() {
       session_secret: 'session_secret',
       session_max_age: 50000,
       store_directory: tmpDir.name,
-      gmail: { user: 'user@example.com', pass: 'password' }
+      notifier: { gmail: { user: 'user@example.com', pass: 'password' } }
     };
   });
 
diff --git a/test/unitary/test_email_sender.js b/test/unitary/test_email_sender.js
deleted file mode 100644
index 9328d674d..000000000
--- a/test/unitary/test_email_sender.js
+++ /dev/null
@@ -1,31 +0,0 @@
-
-
-var sinon = require('sinon');
-var assert = require('assert');
-var EmailSender = require('../../src/lib/email_sender');
-
-describe('test email sender', function() {
-  it('should send an email', function() {
-    var nodemailer = {};
-    var transporter = {};
-    nodemailer.createTransport = sinon.stub().returns(transporter);
-    transporter.sendMail = sinon.stub().yields();
-    var options = {};
-    options.gmail = {};
-    options.gmail.user = 'test@gmail.com';
-    options.gmail.pass = 'test@gmail.com';
-    
-    var sender = new EmailSender(nodemailer, options);
-    var to = 'example@gmail.com';
-    var subject = 'subject';
-    var content = 'content';
-
-    return sender.send(to, subject, content)
-    .then(function() {
-      assert.equal(to, transporter.sendMail.getCall(0).args[0].to);
-      assert.equal(subject, transporter.sendMail.getCall(0).args[0].subject);
-      assert.equal(content, transporter.sendMail.getCall(0).args[0].html);
-      return Promise.resolve();
-    });
-  });
-});
diff --git a/test/unitary/test_identity_check.js b/test/unitary/test_identity_check.js
index 7100db1ea..52e890dd1 100644
--- a/test/unitary/test_identity_check.js
+++ b/test/unitary/test_identity_check.js
@@ -9,7 +9,7 @@ var Promise = require('bluebird');
 describe('test identity check process', function() {
   var req, res, app, icheck_interface;
   var user_data_store;
-  var email_sender;
+  var notifier;
 
   beforeEach(function() {
     req = {};
@@ -25,9 +25,8 @@ describe('test identity check process', function() {
     user_data_store.consume_identity_check_token = sinon.stub();
     user_data_store.consume_identity_check_token.returns(Promise.resolve({ userid: 'user' }));
 
-    email_sender = {};
-    email_sender.send = sinon.stub();
-    email_sender.send = sinon.stub().returns(Promise.resolve());
+    notifier = {};
+    notifier.notify = sinon.stub().returns(Promise.resolve());
 
     req.headers = {};
     req.session = {};
@@ -38,7 +37,7 @@ describe('test identity check process', function() {
     req.app.get = sinon.stub();
     req.app.get.withArgs('logger').returns(winston);
     req.app.get.withArgs('user data store').returns(user_data_store);
-    req.app.get.withArgs('email sender').returns(email_sender);
+    req.app.get.withArgs('notifier').returns(notifier);
 
     res.status = sinon.spy();
     res.send = sinon.spy();
@@ -126,7 +125,7 @@ describe('test identity check process', function() {
 
       res.send = sinon.spy(function() {
         assert.equal(res.status.getCall(0).args[0], 204);
-        assert(email_sender.send.calledOnce);
+        assert(notifier.notify.calledOnce);
         assert(user_data_store.issue_identity_check_token.calledOnce);
         assert.equal(user_data_store.issue_identity_check_token.getCall(0).args[0], 'user');
         assert.equal(user_data_store.issue_identity_check_token.getCall(0).args[3], 240000);
diff --git a/test/unitary/test_server.js b/test/unitary/test_server.js
index 502c2930b..5e2160d52 100644
--- a/test/unitary/test_server.js
+++ b/test/unitary/test_server.js
@@ -38,9 +38,11 @@ describe('test the server', function() {
       session_secret: 'session_secret',
       session_max_age: 50000,
       store_in_memory: true,
-      gmail: {
-        user: 'user@example.com',
-        pass: 'password'
+      notifier: {
+        gmail: {
+          user: 'user@example.com',
+          pass: 'password'
+        }
       }
     };