MailUploaderController::getConfiguration

public function getConfiguration(): \Bitrix\UI\FileUploader\Configuration
{
	$configuration = new Configuration();

	if(\Bitrix\Main\Loader::includeModule('mail'))
	{
		$maxSize = \Bitrix\Mail\Helper\Message::getMaxAttachedFilesSizeAfterEncoding();
		if ($maxSize > 0)
		{
			$configuration->setMaxFileSize($maxSize);
		}
	}

	return $configuration;
}