CUpdateSystem::CheckEMail

static function CheckEMail($email)
{
	$email = trim($email);
	if ($email == '')
		return false;

	if (preg_match("#^[=_.0-9a-z+~'-]+@(([-0-9a-z_]+.)+)([a-z]{2,10})$#i", $email))
		return true;

	return false;
}