Using robots.txt - Webmaster. Help - Yandex
yandex.com › support › webmasterYandex robots correctly process robots.txt, if: The file size doesn't exceed 500 KB. It is a TXT file named "robots", robots.txt. The file is located in the root directory of the site. The file is available for robots: the server that hosts the site responds with an HTTP code with the status 200 OK. Check the server response