frontend\models\PasswordResetRequestForm::rules PHP Method

    public function rules()
    {
        return [['email', 'trim'], ['email', 'required'], ['email', 'email'], ['email', 'exist', 'targetClass' => '\\common\\models\\User', 'filter' => ['status' => User::STATUS_ACTIVE], 'message' => 'There is no user with this email address.']];
    }