Issue 304

@@ -30,7 +30,7 @@
         <md-input-container class="md-block">
             <label translate>user.email</label>
             <input required name="email"
-                   ng-pattern="/^[_a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/"
+                   ng-pattern='/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/'
                    ng-model="user.email">
             <div ng-messages="theForm.email.$error">
                 <div translate ng-message="required">user.email-required</div>