I created Reversed DNS for my domains.
The main domain is domain1.com with Name server ns1.domain1.com and ns2.domain1.com
I configure some subdomains from: mail01.domain1 to mail10.domain1.com.
Then I add the new virtual Machine, with domain name: domain1.com.
I create the subdomains again from mail01.domain2.com to mail10.domain2.com with reversed ip.
I have each ip for each sub domains.
By the way, when dig the subdomains of the domain1.com, they are all resolved to first domain.
$ dig -x xxx.xx.xx.xx +short
(xxx.xx.xx.xx is the ip reversed for mail01.domain1.com)
I really don't understand why. I tried to delete all and created again but still the same result.
Here is my situation.