Config::check

public function check(&$error = null, MainErrorCollection &$errors = null)
{
	$error = null;
	$errors = null;

	if (!$this->canCheck())
	{
		return null;
	}

	if (MainModuleManager::isModuleInstalled('bitrix24'))
	{
		// Private addresses can't be used in the cloud
		$ip = MainWebIpAddress::createByName($this->host);
		if ($ip->isPrivate())
		{
			$error = 'SMTP server address is invalid';
			$errors = new MainErrorCollection([new MainError($error)]);
			return false;
		}
	}

	$client = new MailSmtp(
		$this->host,
		$this->port,
		('smtps' === $this->protocol || ('smtp' !== $this->protocol && 465 === $this->port)),
		true,
		$this->login,
		$this->password
	);
	if (method_exists($client, 'setIsOauth'))
	{
		$client->setIsOauth($this->getIsOauth());
	}

	if (!$client->authenticate($error))
	{
		$errors = $client->getErrors();
		return false;
	}

	return true;
}