I added the following entry (Plesk -> Domain settings -> DNS Settings):
12.345.678.912 / 24 PTR mail.domain.com
The IP address matches the mail.domain.com IP address as that is the one which sends out emails.
I checked the PTR here and the checker says that there is no PTR record. I tried with mail.domain.com
How to setup the PTR records correctly from Plesk? Any clues how to settle this down?
Thanks a lot!