Bitrix24::isEnableForRegistration

public function isEnableForRegistration(string $domainName): bool
{
	$res = CControllerClient::executeEvent(
		'OnMailControllerWhoisDomain',
		[
			'DOMAIN' => trim(strtoupper($domainName)),
			'ZONE' => Manager::getZone()
		]
	);
	if (!empty($res['error']))
	{
		return false;
	}
	return $res && !(isset($res['result']) && $res['result'] === true);
}