Reverse DNS does not match the SMTP banner. How to fix?

Question

Exim

Hello. I set up mail on a domain on my
CentOS 6 + ISPmanager 5 server. IPv4.
All records like DKIM, SPF and DMARC are included. The PTR record is specified as mail.MyDomain.com (matches the checker).

When tested on mail-tester.com 10/10 everything seems to be fine, but there is a flaw that cannot be dealt with on our own.

Specifically, through checking on this service, it gives an error that rDns does not match the Helo greeting:

Reverse DNS lookup or reverse DNS resolution (rDNS) consists in determining the domain name associated with a given IP address.
Some companies such as AOL will reject all mail sent from a server without rDNS, so you need to make sure you have it.
You cannot associate multiple domain names with the same IP address.
Your IP address 111.11.111.11 is associated with the mail.MyDomain.ru domain.
However, your message will be displayed as sent from MyDomain.ru.

You can publish a pointer (PTR type) DNS record with the value MyDomain.ru or use mail.MyDomain.ru as the hostname in your mailer.

Here are the tested values ​​for this check:
IP: 111.11.111.11
HELO: MyDomain.ru
rDNS: mail. MyDomain.ru If you check https://mxtoolbox.com/

through this service , it will issue a Reverse DNS does not match SMTP Banner warning. As I understand it, HELO / EHLO should also have the value mail.MyDomain.ru, and not as it is now MyDomain.ru


And you need to write something for this in the exim config. I shoveled the Internet, tried several options, but I couldn’t fix it. I really don't really understand.

Tell me what and where to prescribe so that HELO / EHLO match.

Answer 1

Correct the exim configuration so that the same name is given in helo, which is written in PTR

remote_smtp:
    driver = smtp
    helo_data = mail.mydomain.ru

Answer 2

Good afternoon!
Write to the hosting support, most often only they can change it.
mail tester greatly underestimates this error, in my opinion it is somewhere around -5