<ng-form name="nestedForm">
    <input type="text"
        id="field-{{ section.id }}-{{ field.id }}"
        name="{{ fieldName }}"
        size="{{ getDefaultFieldSetting('defaultTextFieldSize') }}"
        ng-model="userdata[fieldName]"
        ng-required="field.isRequired"
        ng-class="{hasError: validationStarted && nestedForm.$invalid}"
        ng-pattern="/^.+@([^.@][^@]+)$/">
</ng-form>

<ng-form name="nestedForm">
    <input type="text"
        id="field-{{ section.id }}-{{ field.id }}"
        name="{{ fieldName }}"
        size="{{ getDefaultFieldSetting('defaultTextFieldSize') }}"
        ng-model="userdata[fieldName]"
        ng-required="field.isRequired"
        ng-class="{hasError: validationStarted && nestedForm.$invalid}"
        ng-pattern="/^.+@([^.@][^@]+)$/">
    <span ng-show="validationStarted && nestedForm.$invalid && nestedForm.$error.required && field.isRequired" class="error-message-tag">
        {{ 'Field is mandatory' | i18n }}
    </span>
</ng-form>

Add 'field is mandatory' to email field
Add 'field is mandatory' to email field
