Postfix/Dovecot reverse DNS does not match with your sending domain - virtual domain outgoing IP

I enabled in Virtualmin Sender Dependent Outgoing IP Address (,

But email from ( send from the server (from now is sent with header:
Received: from ( [DomainIP])
by with ESMTPS id s12-v6si8411755lji.172.2019.

and making the test from:

I receive warning:

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address.
Some companies such as AOL will reject any message sent from a server without rDNS, so you must ensure that you have one.
You cannot associate more than one domain name with a single IP address.
Your IP address DomainIP is associated with the domain
Nevertheless your message appears to be sent from

You may want to change the host name of your server to

Here are the tested values for this check:
IP: DomainIP



Is it a way to fix it and change to virtual server to mach it with rDNS?
Is there any other solution?

You can change (or in most cases ask isp to change) the rDNS to match

Ah yes i remember this little annoyance. Struck thus nasty one myself a while back on my google cloud instance. I had to submit a request using google cloud interface to have this alterred. Was a pain in the bum.