diff --git a/Gruntfile.js b/Gruntfile.js
index cf7c78a1..92bd0d4b 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -1,5 +1,6 @@
 module.exports = function (grunt) {
   const buildDir = "dist";
+  const schemaDir = "server/src/lib/configuration/Configuration.schema.json"
 
   grunt.initConfig({
     env: {
@@ -15,6 +16,11 @@ module.exports = function (grunt) {
         cmd: "./node_modules/.bin/tsc",
         args: ['-p', 'server/tsconfig.json']
       },
+      "generate-config-schema": {
+        cmd: "./node_modules/.bin/typescript-json-schema",
+        args: ["-o", schemaDir, "--strictNullChecks",
+               "--required", "server/tsconfig.json", "UserConfiguration"]
+      },
       "compile-client": {
         cmd: "./node_modules/.bin/tsc",
         args: ['-p', 'client/tsconfig.json']
@@ -81,6 +87,10 @@ module.exports = function (grunt) {
         src: '**',
         dest: `${buildDir}/server/src/public_html/js/`
       },
+      schema: {
+        src: schemaDir,
+        dest: `${buildDir}/${schemaDir}`
+      }
     },
     browserify: {
       dist: {
@@ -176,9 +186,10 @@ module.exports = function (grunt) {
   grunt.registerTask('test-int', ['run:test-int']);
 
   grunt.registerTask('copy-resources', ['copy:resources', 'copy:views', 'copy:images', 'copy:thirdparties', 'concat:css']);
+  grunt.registerTask('generate-config-schema', ['run:generate-config-schema', 'copy:schema']);
 
   grunt.registerTask('build-client', ['compile-client', 'browserify']);
-  grunt.registerTask('build-server', ['compile-server', 'copy-resources']);
+  grunt.registerTask('build-server', ['compile-server', 'copy-resources', 'generate-config-schema']);
 
   grunt.registerTask('build', ['build-client', 'build-server']);
   grunt.registerTask('build-dist', ['build', 'run:minify', 'cssmin', 'run:include-minified-script']);
diff --git a/config.template.yml b/config.template.yml
index 810f0133..8bef04b6 100644
--- a/config.template.yml
+++ b/config.template.yml
@@ -204,6 +204,7 @@ notifier:
   # gmail:
   #   username: user@example.com
   #   password: yourpassword
+  #   sender: admin@example.com
   
   # Use a SMTP server for sending notifications
   smtp:
@@ -212,3 +213,4 @@ notifier:
     secure: false
     host: 'smtp'
     port: 1025
+    sender: admin@example.com
\ No newline at end of file
diff --git a/config.test.yml b/config.test.yml
index 7b9d1e1f..034d12ad 100644
--- a/config.test.yml
+++ b/config.test.yml
@@ -166,6 +166,7 @@ notifier:
   # gmail:
   #   username: user@example.com
   #   password: yourpassword
+  #   sender: admin@example.com
   
   # Use a SMTP server for sending notifications
   smtp:
@@ -174,4 +175,4 @@ notifier:
     secure: false
     host: 'smtp'
     port: 1025
-  
+    sender: admin@example.com
diff --git a/package.json b/package.json
index 5a3e0a06..c30331f8 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "title": "Authelia API documentation"
   },
   "dependencies": {
+    "ajv": "^5.2.3",
     "bluebird": "^3.4.7",
     "body-parser": "^1.15.2",
     "connect-redis": "^3.3.0",
@@ -106,6 +107,7 @@
     "ts-node": "^3.3.0",
     "tslint": "^5.2.0",
     "typescript": "^2.3.2",
+    "typescript-json-schema": "^0.17.0",
     "u2f-api": "0.0.9",
     "uglify-es": "^3.0.15"
   },
diff --git a/server/src/lib/IdentityCheckMiddleware.ts b/server/src/lib/IdentityCheckMiddleware.ts
index ffe9292f..0625c13d 100644
--- a/server/src/lib/IdentityCheckMiddleware.ts
+++ b/server/src/lib/IdentityCheckMiddleware.ts
@@ -121,7 +121,7 @@ export function get_start_validation(handler: IdentityValidable, postValidationE
         const host = req.get("Host");
         const link_url = util.format("https://%s%s?identity_token=%s", host, postValidationEndpoint, token);
         logger.info(req, "Notification sent to user \"%s\"", identity.userid);
-        return notifier.notify(identity, handler.mailSubject(), link_url);
+        return notifier.notify(identity.email, handler.mailSubject(), link_url);
       })
       .then(function () {
         handler.preValidationResponse(req, res);
diff --git a/server/src/lib/Server.ts b/server/src/lib/Server.ts
index 8f9f092a..436571fc 100644
--- a/server/src/lib/Server.ts
+++ b/server/src/lib/Server.ts
@@ -6,7 +6,7 @@ import { AppConfiguration, UserConfiguration } from "./configuration/Configurati
 import { GlobalDependencies } from "../../types/Dependencies";
 import { AuthenticationRegulator } from "./AuthenticationRegulator";
 import { UserDataStore } from "./storage/UserDataStore";
-import { ConfigurationAdapter } from "./configuration/ConfigurationAdapter";
+import { ConfigurationParser } from "./configuration/ConfigurationParser";
 import { TOTPValidator } from "./TOTPValidator";
 import { TOTPGenerator } from "./TOTPGenerator";
 import { RestApi } from "./RestApi";
@@ -110,7 +110,7 @@ export default class Server {
     const that = this;
     const app = Express();
 
-    const appConfiguration = ConfigurationAdapter.adapt(userConfiguration);
+    const appConfiguration = ConfigurationParser.parse(userConfiguration);
 
     // by default the level of logs is info
     deps.winston.level = userConfiguration.logs_level;
diff --git a/server/src/lib/configuration/Configuration.d.ts b/server/src/lib/configuration/Configuration.d.ts
index 8faa487d..802572b2 100644
--- a/server/src/lib/configuration/Configuration.d.ts
+++ b/server/src/lib/configuration/Configuration.d.ts
@@ -48,10 +48,10 @@ export type ACLGroupsRules = { [group: string]: ACLRule[]; };
 export type ACLUsersRules = { [user: string]: ACLRule[]; };
 
 export interface ACLConfiguration {
-    default_policy: ACLPolicy;
-    any: ACLDefaultRules;
-    groups: ACLGroupsRules;
-    users: ACLUsersRules;
+    default_policy?: ACLPolicy;
+    any?: ACLDefaultRules;
+    groups?: ACLGroupsRules;
+    users?: ACLUsersRules;
 }
 
 export interface SessionRedisOptions {
@@ -69,6 +69,7 @@ interface SessionCookieConfiguration {
 export interface GmailNotifierConfiguration {
     username: string;
     password: string;
+    sender: string;
 }
 
 export interface SmtpNotifierConfiguration {
@@ -77,6 +78,7 @@ export interface SmtpNotifierConfiguration {
     host: string;
     port: number;
     secure: boolean;
+    sender: string;
 }
 
 export interface FileSystemNotifierConfiguration {
diff --git a/server/src/lib/configuration/Configuration.schema.json b/server/src/lib/configuration/Configuration.schema.json
new file mode 100644
index 00000000..9fd4e923
--- /dev/null
+++ b/server/src/lib/configuration/Configuration.schema.json
@@ -0,0 +1,368 @@
+{
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "definitions": {
+        "ACLConfiguration": {
+            "properties": {
+                "any": {
+                    "items": {
+                        "properties": {
+                            "domain": {
+                                "type": "string"
+                            },
+                            "policy": {
+                                "$ref": "#/definitions/ACLPolicy"
+                            },
+                            "resources": {
+                                "items": {
+                                    "type": "string"
+                                },
+                                "type": "array"
+                            }
+                        },
+                        "required": [
+                            "domain",
+                            "policy"
+                        ],
+                        "type": "object"
+                    },
+                    "type": "array"
+                },
+                "default_policy": {
+                    "$ref": "#/definitions/ACLPolicy"
+                },
+                "groups": {
+                    "additionalProperties": {
+                        "items": {
+                            "properties": {
+                                "domain": {
+                                    "type": "string"
+                                },
+                                "policy": {
+                                    "$ref": "#/definitions/ACLPolicy"
+                                },
+                                "resources": {
+                                    "items": {
+                                        "type": "string"
+                                    },
+                                    "type": "array"
+                                }
+                            },
+                            "required": [
+                                "domain",
+                                "policy"
+                            ],
+                            "type": "object"
+                        },
+                        "type": "array"
+                    },
+                    "type": "object"
+                },
+                "users": {
+                    "additionalProperties": {
+                        "items": {
+                            "properties": {
+                                "domain": {
+                                    "type": "string"
+                                },
+                                "policy": {
+                                    "$ref": "#/definitions/ACLPolicy"
+                                },
+                                "resources": {
+                                    "items": {
+                                        "type": "string"
+                                    },
+                                    "type": "array"
+                                }
+                            },
+                            "required": [
+                                "domain",
+                                "policy"
+                            ],
+                            "type": "object"
+                        },
+                        "type": "array"
+                    },
+                    "type": "object"
+                }
+            },
+            "type": "object"
+        },
+        "ACLPolicy": {
+            "enum": [
+                "allow",
+                "deny"
+            ],
+            "type": "string"
+        },
+        "AuthenticationMethod": {
+            "enum": [
+                "basic_auth",
+                "two_factor"
+            ],
+            "type": "string"
+        },
+        "AuthenticationMethodsConfiguration": {
+            "properties": {
+                "default_method": {
+                    "$ref": "#/definitions/AuthenticationMethod"
+                },
+                "per_subdomain_methods": {
+                    "additionalProperties": {
+                        "enum": [
+                            "basic_auth",
+                            "two_factor"
+                        ],
+                        "type": "string"
+                    },
+                    "type": "object"
+                }
+            },
+            "required": [
+                "default_method",
+                "per_subdomain_methods"
+            ],
+            "type": "object"
+        },
+        "FileSystemNotifierConfiguration": {
+            "properties": {
+                "filename": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "filename"
+            ],
+            "type": "object"
+        },
+        "GmailNotifierConfiguration": {
+            "properties": {
+                "password": {
+                    "type": "string"
+                },
+                "sender": {
+                    "type": "string"
+                },
+                "username": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "password",
+                "sender",
+                "username"
+            ],
+            "type": "object"
+        },
+        "LocalStorageConfiguration": {
+            "properties": {
+                "in_memory": {
+                    "type": "boolean"
+                },
+                "path": {
+                    "type": "string"
+                }
+            },
+            "type": "object"
+        },
+        "MongoStorageConfiguration": {
+            "properties": {
+                "url": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "url"
+            ],
+            "type": "object"
+        },
+        "NotifierConfiguration": {
+            "properties": {
+                "filesystem": {
+                    "$ref": "#/definitions/FileSystemNotifierConfiguration"
+                },
+                "gmail": {
+                    "$ref": "#/definitions/GmailNotifierConfiguration"
+                },
+                "smtp": {
+                    "$ref": "#/definitions/SmtpNotifierConfiguration"
+                }
+            },
+            "type": "object"
+        },
+        "RegulationConfiguration": {
+            "properties": {
+                "ban_time": {
+                    "type": "number"
+                },
+                "find_time": {
+                    "type": "number"
+                },
+                "max_retries": {
+                    "type": "number"
+                }
+            },
+            "required": [
+                "ban_time",
+                "find_time",
+                "max_retries"
+            ],
+            "type": "object"
+        },
+        "SessionCookieConfiguration": {
+            "properties": {
+                "domain": {
+                    "type": "string"
+                },
+                "expiration": {
+                    "type": "number"
+                },
+                "redis": {
+                    "$ref": "#/definitions/SessionRedisOptions"
+                },
+                "secret": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "secret"
+            ],
+            "type": "object"
+        },
+        "SessionRedisOptions": {
+            "properties": {
+                "host": {
+                    "type": "string"
+                },
+                "port": {
+                    "type": "number"
+                }
+            },
+            "required": [
+                "host",
+                "port"
+            ],
+            "type": "object"
+        },
+        "SmtpNotifierConfiguration": {
+            "properties": {
+                "host": {
+                    "type": "string"
+                },
+                "password": {
+                    "type": "string"
+                },
+                "port": {
+                    "type": "number"
+                },
+                "secure": {
+                    "type": "boolean"
+                },
+                "sender": {
+                    "type": "string"
+                },
+                "username": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "host",
+                "password",
+                "port",
+                "secure",
+                "sender",
+                "username"
+            ],
+            "type": "object"
+        },
+        "StorageConfiguration": {
+            "properties": {
+                "local": {
+                    "$ref": "#/definitions/LocalStorageConfiguration"
+                },
+                "mongo": {
+                    "$ref": "#/definitions/MongoStorageConfiguration"
+                }
+            },
+            "type": "object"
+        },
+        "UserLdapConfiguration": {
+            "properties": {
+                "additional_groups_dn": {
+                    "type": "string"
+                },
+                "additional_users_dn": {
+                    "type": "string"
+                },
+                "base_dn": {
+                    "type": "string"
+                },
+                "group_name_attribute": {
+                    "type": "string"
+                },
+                "groups_filter": {
+                    "type": "string"
+                },
+                "mail_attribute": {
+                    "type": "string"
+                },
+                "password": {
+                    "type": "string"
+                },
+                "url": {
+                    "type": "string"
+                },
+                "user": {
+                    "type": "string"
+                },
+                "users_filter": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "base_dn",
+                "password",
+                "url",
+                "user"
+            ],
+            "type": "object"
+        }
+    },
+    "properties": {
+        "access_control": {
+            "$ref": "#/definitions/ACLConfiguration"
+        },
+        "authentication_methods": {
+            "$ref": "#/definitions/AuthenticationMethodsConfiguration"
+        },
+        "ldap": {
+            "$ref": "#/definitions/UserLdapConfiguration"
+        },
+        "logs_level": {
+            "type": "string"
+        },
+        "notifier": {
+            "$ref": "#/definitions/NotifierConfiguration"
+        },
+        "port": {
+            "type": "number"
+        },
+        "regulation": {
+            "$ref": "#/definitions/RegulationConfiguration"
+        },
+        "session": {
+            "$ref": "#/definitions/SessionCookieConfiguration"
+        },
+        "storage": {
+            "$ref": "#/definitions/StorageConfiguration"
+        }
+    },
+    "required": [
+        "ldap",
+        "notifier",
+        "regulation",
+        "session",
+        "storage"
+    ],
+    "type": "object"
+}
+
diff --git a/server/src/lib/configuration/ConfigurationAdapter.ts b/server/src/lib/configuration/ConfigurationParser.ts
similarity index 87%
rename from server/src/lib/configuration/ConfigurationAdapter.ts
rename to server/src/lib/configuration/ConfigurationParser.ts
index da5807bd..32f5acf5 100644
--- a/server/src/lib/configuration/ConfigurationAdapter.ts
+++ b/server/src/lib/configuration/ConfigurationParser.ts
@@ -9,6 +9,7 @@ import {
 import Util = require("util");
 import { ACLAdapter } from "./adapters/ACLAdapter";
 import { AuthenticationMethodsAdapter } from "./adapters/AuthenticationMethodsAdapter";
+import { Validator } from "./Validator";
 
 const LDAP_URL_ENV_VARIABLE = "LDAP_URL";
 
@@ -58,9 +59,8 @@ function adaptLdapConfiguration(userConfig: UserLdapConfiguration): LdapConfigur
 
 function adaptFromUserConfiguration(userConfiguration: UserConfiguration)
   : AppConfiguration {
-  ensure_key_existence(userConfiguration, "ldap");
-  ensure_key_existence(userConfiguration, "session.secret");
-  ensure_key_existence(userConfiguration, "regulation");
+  if (!Validator.isValid(userConfiguration))
+    throw new Error("Configuration is malformed. Please double check your configuration file.");
 
   const port = userConfiguration.port || 8080;
   const ldapConfiguration = adaptLdapConfiguration(userConfiguration.ldap);
@@ -88,8 +88,13 @@ function adaptFromUserConfiguration(userConfiguration: UserConfiguration)
   };
 }
 
-export class ConfigurationAdapter {
-  static adapt(userConfiguration: UserConfiguration): AppConfiguration {
+export class ConfigurationParser {
+  static parse(userConfiguration: UserConfiguration): AppConfiguration {
+    const errors = Validator.isValid(userConfiguration);
+    if (errors.length > 0) {
+      errors.forEach((e: string) => { console.log(e); });
+      throw new Error("Malformed configuration. Please double-check your configuration file.");
+    }
     const appConfiguration = adaptFromUserConfiguration(userConfiguration);
 
     const ldapUrl = process.env[LDAP_URL_ENV_VARIABLE];
diff --git a/server/src/lib/configuration/Validator.ts b/server/src/lib/configuration/Validator.ts
new file mode 100644
index 00000000..5058d08d
--- /dev/null
+++ b/server/src/lib/configuration/Validator.ts
@@ -0,0 +1,85 @@
+import Ajv = require("ajv");
+import Path = require("path");
+import Util = require("util");
+import {
+  UserConfiguration, StorageConfiguration,
+  NotifierConfiguration
+} from "./Configuration";
+
+function validateSchema(configuration: UserConfiguration): string[] {
+  const schema = require(Path.resolve(__dirname, "./Configuration.schema.json"));
+  const ajv = new Ajv({
+    allErrors: true,
+    missingRefs: "fail"
+  });
+  ajv.addMetaSchema(require("ajv/lib/refs/json-schema-draft-04.json"));
+  const valid = ajv.validate(schema, configuration);
+  if (!valid)
+    return ajv.errors.map(
+      (e: Ajv.ErrorObject) => { return ajv.errorsText([e]); });
+  return [];
+}
+
+function validateUnknownKeys(path: string, obj: any, knownKeys: string[]) {
+  const keysSet = new Set(Object.keys(obj));
+  const knownKeysSet = new Set(knownKeys);
+
+  const unknownKeysSet = new Set(
+    [...keysSet].filter(x => !knownKeysSet.has(x)));
+
+  if (unknownKeysSet.size > 0) {
+    const unknownKeys = Array.from(unknownKeysSet);
+    return unknownKeys.map((k: string) => { return Util.format("data.%s has unknown key '%s'", path, k); });
+  }
+  return [];
+}
+
+function validateStorage(storage: any) {
+  const ERROR = "Storage must be either 'local' or 'mongo'";
+
+  if (!storage)
+    return [];
+
+  const errors = validateUnknownKeys("storage", storage, ["local", "mongo"]);
+  if (errors.length > 0)
+    return errors;
+
+  if (storage.local && storage.mongo)
+    return [ERROR];
+
+  if (!storage.local && !storage.mongo)
+    return [ERROR];
+
+  return [];
+}
+
+function validateNotifier(notifier: NotifierConfiguration) {
+  const ERROR = "Notifier must be either 'filesystem', 'gmail' or 'smtp'";
+
+  if (!notifier)
+    return [];
+
+  const errors = validateUnknownKeys("notifier", notifier, ["filesystem", "gmail", "smtp"]);
+  if (errors.length > 0)
+    return errors;
+
+  if (notifier && notifier.filesystem && notifier.gmail && notifier.smtp)
+    return [ERROR];
+
+  if (notifier && !notifier.filesystem && !notifier.gmail && !notifier.smtp)
+    return [ERROR];
+
+  return [];
+}
+
+export class Validator {
+  static isValid(configuration: any): string[] {
+    const schemaErrors = validateSchema(configuration);
+    const storageErrors = validateStorage(configuration.storage);
+    const notifierErrors = validateNotifier(configuration.notifier);
+
+    return schemaErrors
+      .concat(storageErrors)
+      .concat(notifierErrors);
+  }
+}
\ No newline at end of file
diff --git a/server/src/lib/notifiers/AbstractEmailNotifier.ts b/server/src/lib/notifiers/AbstractEmailNotifier.ts
index 2a925fd8..198e4e5d 100644
--- a/server/src/lib/notifiers/AbstractEmailNotifier.ts
+++ b/server/src/lib/notifiers/AbstractEmailNotifier.ts
@@ -10,15 +10,14 @@ import BluebirdPromise = require("bluebird");
 const email_template = Fs.readFileSync(Path.join(__dirname, "../../resources/email-template.ejs"), "UTF-8");
 
 export abstract class AbstractEmailNotifier implements INotifier {
-
-  notify(identity: Identity, subject: string, link: string): BluebirdPromise<void> {
+  notify(to: string, subject: string, link: string): BluebirdPromise<void> {
     const d = {
       url: link,
       button_title: "Continue",
       title: subject
     };
-    return this.sendEmail(identity.email, subject, Ejs.render(email_template, d));
+    return this.sendEmail(to, subject, Ejs.render(email_template, d));
   }
 
-  abstract sendEmail(email: string, subject: string, content: string): BluebirdPromise<void>;
+  abstract sendEmail(to: string, subject: string, content: string): BluebirdPromise<void>;
 }
\ No newline at end of file
diff --git a/server/src/lib/notifiers/FileSystemNotifier.ts b/server/src/lib/notifiers/FileSystemNotifier.ts
index efa9c622..c5a9f30c 100644
--- a/server/src/lib/notifiers/FileSystemNotifier.ts
+++ b/server/src/lib/notifiers/FileSystemNotifier.ts
@@ -13,9 +13,9 @@ export class FileSystemNotifier implements INotifier {
     this.filename = options.filename;
   }
 
-  notify(identity: Identity, subject: string, link: string): BluebirdPromise<void> {
-    const content = util.format("Date: %s\nUser: %s\nSubject: %s\nLink: %s", new Date().toString(), identity.userid,
-      subject, link);
+  notify(to: string, subject: string, link: string): BluebirdPromise<void> {
+    const content = util.format("Date: %s\nEmail: %s\nSubject: %s\nLink: %s",
+      new Date().toString(), to, subject, link);
     const writeFilePromised: any = BluebirdPromise.promisify(Fs.writeFile);
     return writeFilePromised(this.filename, content);
   }
diff --git a/server/src/lib/notifiers/GMailNotifier.ts b/server/src/lib/notifiers/GMailNotifier.ts
index 16aeb417..caa81581 100644
--- a/server/src/lib/notifiers/GMailNotifier.ts
+++ b/server/src/lib/notifiers/GMailNotifier.ts
@@ -7,16 +7,18 @@ import { IMailSender } from "./IMailSender";
 
 export class GMailNotifier extends AbstractEmailNotifier {
   private mailSender: IMailSender;
+  private sender: string;
 
   constructor(options: GmailNotifierConfiguration, mailSender: IMailSender) {
     super();
     this.mailSender = mailSender;
+    this.sender = options.sender;
   }
 
-  sendEmail(email: string, subject: string, content: string) {
+  sendEmail(to: string, subject: string, content: string) {
     const mailOptions = {
-      from: "authelia@authelia.com",
-      to: email,
+      from: this.sender,
+      to: to,
       subject: subject,
       html: content
     };
diff --git a/server/src/lib/notifiers/INotifier.d.ts b/server/src/lib/notifiers/INotifier.d.ts
deleted file mode 100644
index 63f26097..00000000
--- a/server/src/lib/notifiers/INotifier.d.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-
-import * as BluebirdPromise from "bluebird";
-import { Identity } from "../../../types/Identity";
-
-export interface INotifier {
-  notify(identity: Identity, subject: string, link: string): BluebirdPromise<void>;
-}
\ No newline at end of file
diff --git a/server/src/lib/notifiers/INotifier.ts b/server/src/lib/notifiers/INotifier.ts
new file mode 100644
index 00000000..b9a6b138
--- /dev/null
+++ b/server/src/lib/notifiers/INotifier.ts
@@ -0,0 +1,5 @@
+import * as BluebirdPromise from "bluebird";
+
+export interface INotifier {
+  notify(to: string, subject: string, link: string): BluebirdPromise<void>;
+}
\ No newline at end of file
diff --git a/server/src/lib/notifiers/SmtpNotifier.ts b/server/src/lib/notifiers/SmtpNotifier.ts
index 5ed86621..cda174c9 100644
--- a/server/src/lib/notifiers/SmtpNotifier.ts
+++ b/server/src/lib/notifiers/SmtpNotifier.ts
@@ -8,17 +8,19 @@ import { SmtpNotifierConfiguration } from "../configuration/Configuration";
 
 export class SmtpNotifier extends AbstractEmailNotifier {
   private mailSender: IMailSender;
+  private sender: string;
 
   constructor(options: SmtpNotifierConfiguration,
     mailSender: IMailSender) {
     super();
     this.mailSender = mailSender;
+    this.sender = options.sender;
   }
 
-  sendEmail(email: string, subject: string, content: string) {
+  sendEmail(to: string, subject: string, content: string) {
     const mailOptions = {
-      from: "authelia@authelia.com",
-      to: email,
+      from: this.sender,
+      to: to,
       subject: subject,
       html: content
     };
diff --git a/server/test/ServerConfiguration.test.ts b/server/test/ServerConfiguration.test.ts
index 3f300273..e3327765 100644
--- a/server/test/ServerConfiguration.test.ts
+++ b/server/test/ServerConfiguration.test.ts
@@ -55,7 +55,8 @@ describe("test server configuration", function () {
       notifier: {
         gmail: {
           username: "user@example.com",
-          password: "password"
+          password: "password",
+          sender: "test@authelia.com"
         }
       },
       regulation: {
diff --git a/server/test/configuration/ConfigurationAdapter.test.ts b/server/test/configuration/ConfigurationParser.test.ts
similarity index 70%
rename from server/test/configuration/ConfigurationAdapter.test.ts
rename to server/test/configuration/ConfigurationParser.test.ts
index 62f6f6e3..f851dde0 100644
--- a/server/test/configuration/ConfigurationAdapter.test.ts
+++ b/server/test/configuration/ConfigurationParser.test.ts
@@ -3,10 +3,10 @@ import {
   UserConfiguration,
   LdapConfiguration, ACLConfiguration
 } from "../../src/lib/configuration/Configuration";
-import { ConfigurationAdapter } from "../../src/lib/configuration/ConfigurationAdapter";
+import { ConfigurationParser } from "../../src/lib/configuration/ConfigurationParser";
 
-describe("test config adapter", function () {
-  function build_yaml_config(): UserConfiguration {
+describe("test config parser", function () {
+  function buildYamlConfig(): UserConfiguration {
     const yaml_config: UserConfiguration = {
       port: 8080,
       ldap: {
@@ -36,7 +36,8 @@ describe("test config adapter", function () {
       notifier: {
         gmail: {
           username: "user",
-          password: "password"
+          password: "password",
+          sender: "admin@example.com"
         }
       }
     };
@@ -45,61 +46,63 @@ describe("test config adapter", function () {
 
   describe("port", function () {
     it("should read the port from the yaml file", function () {
-      const yaml_config = build_yaml_config();
+      const yaml_config = buildYamlConfig();
       yaml_config.port = 7070;
-      const config = ConfigurationAdapter.adapt(yaml_config);
+      const config = ConfigurationParser.parse(yaml_config);
       Assert.equal(config.port, 7070);
     });
 
     it("should default the port to 8080 if not provided", function () {
-      const yaml_config = build_yaml_config();
+      const yaml_config = buildYamlConfig();
       delete yaml_config.port;
-      const config = ConfigurationAdapter.adapt(yaml_config);
+      const config = ConfigurationParser.parse(yaml_config);
       Assert.equal(config.port, 8080);
     });
   });
 
   it("should get the session attributes", function () {
-    const yaml_config = build_yaml_config();
+    const yaml_config = buildYamlConfig();
     yaml_config.session = {
       domain: "example.com",
       secret: "secret",
       expiration: 3600
     };
-    const config = ConfigurationAdapter.adapt(yaml_config);
+    const config = ConfigurationParser.parse(yaml_config);
     Assert.equal(config.session.domain, "example.com");
     Assert.equal(config.session.secret, "secret");
     Assert.equal(config.session.expiration, 3600);
   });
 
   it("should get the log level", function () {
-    const yaml_config = build_yaml_config();
+    const yaml_config = buildYamlConfig();
     yaml_config.logs_level = "debug";
-    const config = ConfigurationAdapter.adapt(yaml_config);
+    const config = ConfigurationParser.parse(yaml_config);
     Assert.equal(config.logs_level, "debug");
   });
 
   it("should get the notifier config", function () {
-    const yaml_config = build_yaml_config();
-    yaml_config.notifier = {
+    const userConfig = buildYamlConfig();
+    userConfig.notifier = {
       gmail: {
         username: "user",
-        password: "pass"
+        password: "pass",
+        sender: "admin@example.com"
       }
     };
-    const config = ConfigurationAdapter.adapt(yaml_config);
+    const config = ConfigurationParser.parse(userConfig);
     Assert.deepEqual(config.notifier, {
       gmail: {
         username: "user",
-        password: "pass"
+        password: "pass",
+        sender: "admin@example.com"
       }
     });
   });
 
   describe("access_control", function() {
     it("should adapt access_control when it is already ok", function () {
-      const yaml_config = build_yaml_config();
-      yaml_config.access_control = {
+      const userConfig = buildYamlConfig();
+      userConfig.access_control = {
         default_policy: "deny",
         any: [{
           domain: "public.example.com",
@@ -113,7 +116,7 @@ describe("test config adapter", function () {
         },
         groups: {}
       };
-      const config = ConfigurationAdapter.adapt(yaml_config);
+      const config = ConfigurationParser.parse(userConfig);
       Assert.deepEqual(config.access_control, {
         default_policy: "deny",
         any: [{
@@ -132,9 +135,9 @@ describe("test config adapter", function () {
 
 
     it("should adapt access_control when it is empty", function () {
-      const yaml_config = build_yaml_config();
-      yaml_config.access_control = {} as any;
-      const config = ConfigurationAdapter.adapt(yaml_config);
+      const userConfig = buildYamlConfig();
+      userConfig.access_control = {} as any;
+      const config = ConfigurationParser.parse(userConfig);
       Assert.deepEqual(config.access_control, {
         default_policy: "deny",
         any: [],
diff --git a/server/test/configuration/LdapConfigurationAdaptation.test.ts b/server/test/configuration/LdapConfigurationAdaptation.test.ts
index 63c0a8bd..59aab253 100644
--- a/server/test/configuration/LdapConfigurationAdaptation.test.ts
+++ b/server/test/configuration/LdapConfigurationAdaptation.test.ts
@@ -1,6 +1,6 @@
 import * as Assert from "assert";
 import { UserConfiguration, LdapConfiguration } from "../../src/lib/configuration/Configuration";
-import { ConfigurationAdapter } from "../../src/lib/configuration/ConfigurationAdapter";
+import { ConfigurationParser } from "../../src/lib/configuration/ConfigurationParser";
 
 describe("test ldap configuration adaptation", function () {
   function build_yaml_config(): UserConfiguration {
@@ -33,7 +33,8 @@ describe("test ldap configuration adaptation", function () {
       notifier: {
         gmail: {
           username: "user",
-          password: "password"
+          password: "password",
+          sender: "admin@example.com"
         }
       }
     };
@@ -41,15 +42,15 @@ describe("test ldap configuration adaptation", function () {
   }
 
   it("should adapt correctly while user only specify mandatory fields", function () {
-    const yaml_config = build_yaml_config();
-    yaml_config.ldap = {
+    const userConfig = build_yaml_config();
+    userConfig.ldap = {
       url: "http://ldap",
       base_dn: "dc=example,dc=com",
       user: "admin",
       password: "password"
     };
 
-    const config = ConfigurationAdapter.adapt(yaml_config);
+    const config = ConfigurationParser.parse(userConfig);
     const expectedConfig: LdapConfiguration = {
       url: "http://ldap",
       users_dn: "dc=example,dc=com",
@@ -66,8 +67,8 @@ describe("test ldap configuration adaptation", function () {
   });
 
   it("should adapt correctly while user specify every fields", function () {
-    const yaml_config = build_yaml_config();
-    yaml_config.ldap = {
+    const userConfig = build_yaml_config();
+    userConfig.ldap = {
       url: "http://ldap-server",
       base_dn: "dc=example,dc=com",
       additional_users_dn: "ou=users",
@@ -80,7 +81,7 @@ describe("test ldap configuration adaptation", function () {
       password: "password2"
     };
 
-    const config = ConfigurationAdapter.adapt(yaml_config);
+    const config = ConfigurationParser.parse(userConfig);
     const expectedConfig: LdapConfiguration = {
       url: "http://ldap-server",
       users_dn: "ou=users,dc=example,dc=com",
diff --git a/server/test/configuration/Validator.test.ts b/server/test/configuration/Validator.test.ts
new file mode 100644
index 00000000..69d3afca
--- /dev/null
+++ b/server/test/configuration/Validator.test.ts
@@ -0,0 +1,91 @@
+import { Validator } from "../../src/lib/configuration/Validator";
+import Assert = require("assert");
+
+describe("test validator", function () {
+  it("should validate wrong user configurations", function () {
+    // Some examples
+    Assert.deepStrictEqual(Validator.isValid({}), [
+      "data should have required property 'ldap'",
+      "data should have required property 'notifier'",
+      "data should have required property 'regulation'",
+      "data should have required property 'session'",
+      "data should have required property 'storage'"
+    ]);
+
+    Assert.deepStrictEqual(Validator.isValid({
+      ldap: {},
+      notifier: {},
+      regulation: {},
+      session: {},
+      storage: {}
+    }), [
+        "data.ldap should have required property 'base_dn'",
+        "data.ldap should have required property 'password'",
+        "data.ldap should have required property 'url'",
+        "data.ldap should have required property 'user'",
+        "data.regulation should have required property 'ban_time'",
+        "data.regulation should have required property 'find_time'",
+        "data.regulation should have required property 'max_retries'",
+        "data.session should have required property 'secret'",
+        "Storage must be either 'local' or 'mongo'",
+        "Notifier must be either 'filesystem', 'gmail' or 'smtp'"
+      ]);
+
+    Assert.deepStrictEqual(Validator.isValid({
+      ldap: {
+        base_dn: "dc=example,dc=com",
+        password: "password",
+        url: "ldap://ldap",
+        user: "user"
+      },
+      notifier: {
+        abcd: []
+      },
+      regulation: {
+        ban_time: 120,
+        find_time: 30,
+        max_retries: 3
+      },
+      session: {
+        secret: "unsecure_secret"
+      },
+      storage: {
+        abc: {}
+      }
+    }), [
+        "data.storage has unknown key 'abc'",
+        "data.notifier has unknown key 'abcd'"
+      ]);
+  });
+
+  it("should validate correct user configurations", function () {
+    Assert.deepStrictEqual(Validator.isValid({
+      ldap: {
+        base_dn: "dc=example,dc=com",
+        password: "password",
+        url: "ldap://ldap",
+        user: "user"
+      },
+      notifier: {
+        gmail: {
+          username: "user@gmail.com",
+          password: "pass",
+          sender: "admin@example.com"
+        }
+      },
+      regulation: {
+        ban_time: 120,
+        find_time: 30,
+        max_retries: 3
+      },
+      session: {
+        secret: "unsecure_secret"
+      },
+      storage: {
+        local: {
+          path: "/var/lib/authelia"
+        }
+      }
+    }), []);
+  });
+});
\ No newline at end of file
diff --git a/server/test/notifiers/GMailNotifier.test.ts b/server/test/notifiers/GMailNotifier.test.ts
index 7efba444..8d598d5d 100644
--- a/server/test/notifiers/GMailNotifier.test.ts
+++ b/server/test/notifiers/GMailNotifier.test.ts
@@ -1,5 +1,5 @@
 import * as sinon from "sinon";
-import * as assert from "assert";
+import * as Assert from "assert";
 import BluebirdPromise = require("bluebird");
 
 import { MailSenderStub } from "../mocks/notifiers/MailSenderStub";
@@ -11,24 +11,19 @@ describe("test gmail notifier", function () {
     const mailSender = new MailSenderStub();
     const options = {
       username: "user_gmail",
-      password: "pass_gmail"
+      password: "pass_gmail",
+      sender: "admin@example.com"
     };
 
     mailSender.sendStub.returns(BluebirdPromise.resolve());
     const sender = new GMailNotifier.GMailNotifier(options, mailSender);
     const subject = "subject";
-
-    const identity = {
-      userid: "user",
-      email: "user@example.com"
-    };
-
     const url = "http://test.com";
 
-    return sender.notify(identity, subject, url)
+    return sender.notify("user@example.com", subject, url)
       .then(function () {
-        assert.equal(mailSender.sendStub.getCall(0).args[0].to, "user@example.com");
-        assert.equal(mailSender.sendStub.getCall(0).args[0].subject, "subject");
+        Assert.equal(mailSender.sendStub.getCall(0).args[0].to, "user@example.com");
+        Assert.equal(mailSender.sendStub.getCall(0).args[0].subject, "subject");
         return BluebirdPromise.resolve();
       });
   });
@@ -37,24 +32,20 @@ describe("test gmail notifier", function () {
     const mailSender = new MailSenderStub();
     const options = {
       username: "user_gmail",
-      password: "pass_gmail"
+      password: "pass_gmail",
+      sender: "admin@example.com"
     };
 
     mailSender.sendStub.returns(BluebirdPromise.reject(new Error("Failed to send mail")));
     const sender = new GMailNotifier.GMailNotifier(options, mailSender);
     const subject = "subject";
-
-    const identity = {
-      userid: "user",
-      email: "user@example.com"
-    };
-
     const url = "http://test.com";
 
-    return sender.notify(identity, subject, url)
+    return sender.notify("user@example.com", subject, url)
       .then(function () {
         return BluebirdPromise.reject(new Error());
       }, function() {
+        Assert.equal(mailSender.sendStub.getCall(0).args[0].from, "admin@example.com");
         return BluebirdPromise.resolve();
       });
   });
diff --git a/server/test/notifiers/MailSenderBuilder.test.ts b/server/test/notifiers/MailSenderBuilder.test.ts
index 9cb08880..f0d76911 100644
--- a/server/test/notifiers/MailSenderBuilder.test.ts
+++ b/server/test/notifiers/MailSenderBuilder.test.ts
@@ -18,7 +18,8 @@ describe("test MailSenderBuilder", function() {
     const mailSenderBuilder = new MailSenderBuilder(Nodemailer);
     mailSenderBuilder.buildGmail({
       username: "user_gmail",
-      password: "pass_gmail"
+      password: "pass_gmail",
+      sender: "admin@example.com"
     });
     Assert.equal(createTransportStub.getCall(0).args[0].auth.user, "user_gmail");
     Assert.equal(createTransportStub.getCall(0).args[0].auth.pass, "pass_gmail");
@@ -31,7 +32,8 @@ describe("test MailSenderBuilder", function() {
       password: "password",
       port: 25,
       secure: true,
-      username: "user"
+      username: "user",
+      sender: "admin@example.com"
     });
     Assert.deepStrictEqual(createTransportStub.getCall(0).args[0], {
       host: "mail.example.com",
diff --git a/server/test/notifiers/NotifierFactory.test.ts b/server/test/notifiers/NotifierFactory.test.ts
index 5763f703..6dd25d4a 100644
--- a/server/test/notifiers/NotifierFactory.test.ts
+++ b/server/test/notifiers/NotifierFactory.test.ts
@@ -15,7 +15,8 @@ describe("test notifier factory", function () {
     const options = {
       gmail: {
         username: "abc",
-        password: "password"
+        password: "password",
+        sender: "admin@example.com"
       }
     };
     mailSenderBuilderStub = new MailSenderBuilderStub();
@@ -29,7 +30,8 @@ describe("test notifier factory", function () {
         password: "pass",
         secure: true,
         host: "localhost",
-        port: 25
+        port: 25,
+        sender: "admin@example.com"
       }
     };
 
diff --git a/server/test/server/PrivatePages.ts b/server/test/server/PrivatePages.ts
index 09bdb383..dee30119 100644
--- a/server/test/server/PrivatePages.ts
+++ b/server/test/server/PrivatePages.ts
@@ -54,7 +54,8 @@ describe("Private pages of the server must not be accessible without session", f
       notifier: {
         gmail: {
           username: "user@example.com",
-          password: "password"
+          password: "password",
+          sender: "admin@example.com"
         }
       }
     };
diff --git a/server/test/server/PublicPages.ts b/server/test/server/PublicPages.ts
index aef0bf6b..21f09917 100644
--- a/server/test/server/PublicPages.ts
+++ b/server/test/server/PublicPages.ts
@@ -54,7 +54,8 @@ describe("Public pages of the server must be accessible without session", functi
       notifier: {
         gmail: {
           username: "user@example.com",
-          password: "password"
+          password: "password",
+          sender: "admin@example.com"
         }
       }
     };