How to correctly write a PTR record for the IP of the mail server?

Question

Email

There is a mail server. The server writes the following in the header of the email

Received: from mx.to-text.ru (unknown [193.104.225.2])

I need to add a reverse PTR record to my IP. Can you please tell me what should the PTR record in the IP address point to, mx.to-text.ru or to-text.ru?

Answer 1

The administrator of my provider has registered an entry pointing to to-text.ru. The entry successfully passes tests in spamassassin.

Answer 2

a reverse PTR record can be registered by the provider that gives you the IP