How to properly reconfigure SMTP?

Question

SMTP

Somewhere not set up, acts as ESMTPS - biznes-mails.ru, sends letters in the
mailing structure:
1 - commands and signs letters bizmy-mails.ru
2 - host hiring a vds mailer - adsbizmy-mails.ru
3 - uptrastmail.ru - mailing domain should be
like everything is configured correctly. and the mailer is biznes-mails.ru
smtp: uptrastmail.ru smtp.uptrastmail.ru [email protected]
where to look, where it can be configured incorrectly?

Answer 1

the problem is partly here apparently:
Here are the tested values ​​of this check from the letter:
IP: 178.250.246.76
HELO: adsbizmy-mails.ru
rDNS: biznes-mails.ru
----------------- --------
while all testers of direct analysis ptr:
76.246.250.178.in-addr.arpa IN PTR biznes-mails.ru
80.246.250.178.in-addr.arpa IN PTR adsbizmy-mails.ru
not really I understand that this is not the case.
received: from biznes-mails.ru (biznes-mails.ru [178.250.246.76])
do I understand correctly that something needs to be edited here?
exim4 - who knows where to dig?
178.250.246.55 \ uptrastmail.ru - does not appear anywhere