CAllMailBox::Check

function Check($server, $port, $use_tls, $login, $passw)
{
	if (($use_tls == 'Y' || $use_tls == 'S') && !preg_match('#^(tls|ssl)://#', $server))
		$server = 'ssl://' . $server;

	$skip_cert = $use_tls != 'Y';

	$pop3_conn = &$this->pop3_conn;
	$pop3_conn = stream_socket_client(
		sprintf('%s:%s', $server, $port),
		$errno, $errstr,
		COption::getOptionInt('mail', 'connect_timeout', B_MAIL_TIMEOUT),
		STREAM_CLIENT_CONNECT,
		stream_context_create(array('ssl' => array('verify_peer' => !$skip_cert, 'verify_peer_name' => !$skip_cert)))
	);
	if(!$pop3_conn)
		return array(false, GetMessage("MAIL_CL_TIMEOUT")." $errstr ($errno)");

	$this->GetResponse();
	$greeting = $this->GetResponseString();

	$this->SendCommand("USER ".$login);
	if(!$this->GetResponse())
		return array(false, GetMessage("MAIL_CL_ERR_USER").' ('.$this->GetResponseString().')');
	$this->SendCommand("PASS ".$passw);
	if(!$this->GetResponse())
		return array(false, GetMessage("MAIL_CL_ERR_PASSWORD").' ('.$this->GetResponseString().')');

	$this->SendCommand("STAT");

	if(!$this->GetResponse())
		return array(false, GetMessage("MAIL_CL_ERR_STAT").' ('.$this->GetResponseString().')');

	$stat = trim($this->GetResponseBody());
	$arStat = explode(" ", $stat);
	return array(true, $arStat[1]);
}