public function AddSubAccount($email, $password, $confirmPassword, $requiresEmailCredits = false, $enableLitmusTest = false, $requiresLitmusCredits = false, $maxContacts = 0, $enablePrivateIPRequest = true, $sendActivation = false, $returnUrl = null, $sendingPermission = null, $enableContactFeatures = null, $poolName = null, $emailSizeLimit = 10, $dailySendLimit = null) {
        return $this->sendRequest('account/addsubaccount', array(
                    'email' => $email,
                    'password' => $password,
                    'confirmPassword' => $confirmPassword,
                    'requiresEmailCredits' => $requiresEmailCredits,
                    'enableLitmusTest' => $enableLitmusTest,
                    'requiresLitmusCredits' => $requiresLitmusCredits,
                    'maxContacts' => $maxContacts,
                    'enablePrivateIPRequest' => $enablePrivateIPRequest,
                    'sendActivation' => $sendActivation,
                    'returnUrl' => $returnUrl,
                    'sendingPermission' => $sendingPermission,
                    'enableContactFeatures' => $enableContactFeatures,
                    'poolName' => $poolName,
                    'emailSizeLimit' => $emailSizeLimit,
                    'dailySendLimit' => $dailySendLimit
        ));
    }