SSL Issue for mail server

I have followed the instruction for multi domain hosting and DNS but on my smtp, the reserse record is not showing (because there is not ptr record).

here is the scenario:
My cyberpanel host: and this is my mail server.

My domain in this host is: and I have created as my MX record for this domain (and I don’t want to use or for MX for

How to avoid this Reverse record scenario?

Thanks in Advance.

This solution is not right. He didn’t mention the reverse lookup.

Anyone? I am waiting. I need to clear this thing.