How to set up a Ptr record on the Yandex side (mail for the pdd.yandex.ru domain)?

Question

Exim

The domain is delegated to dns1.yandex.net dns2.yandex.ru , when sending a letter from the server to Yandex,
this header is:

Received: from unknown (unknown [2ba01:4f8:130:420a::2])
  by mxfront10g.mail.yandex.net (nwsmtp/Yandex) with ESMTPS id WaYzVZTl9f-nVjK8n87;
  Sun, 30 Apr 2017 16:49:31 +0300
  (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
  (Client certificate not present)

mail.ru

Received: from static.78.78.78.78.clients.your-server.de ([78.78.78.78]:45390 helo=mail.domain.ru)
  by mx171.mail.ru with esmtp (envelope-from <[email protected]>)
  id 1d4pDl-0004EJ-7m

why Yandex does not receive such a header? How to set up a ptr record on Yandex (Mail for Domain)?

Answer 1

PTR is configured on the side of your hosting provider. This is the entry for IP