User-Agent Mozilla/5.0 (compatible; Yandex...) string identifies Yandex robots.
Robots can send
GET (for example,
YandexWebmaster/2.0) requests to a server.
A reverse DNS lookup can be used to check the authenticity of Yandex robots.
More information can be found in the How to check that a robot belongs to Yandex section of the Webmaster help.
If you have any questions about our robots, please contact our support service: firstname.lastname@example.org. If you are experiencing technical issues with our robots we recommend attaching your server log.