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Web Hosting and Cloud Computing Control Panels
rDNS is directly connected with IP so you need to set one rDNS for each IP you have active regardless if that is IPv4 or IPv6. All domains and subdomains on same IP(s) will use same rDNS.
Example with 2 IPs:
- IP1 - xxx.xxx.xxx.xxx; Domains: domain1.tld, domain2.tld, domain3.tld
- Primary domain - domain1.tld
- rDNS (must be FQDN) - whatever-you-want.domain1.tld
- domain2.tld and domain3.tld are using "whatever-you-want.domain1.tld"
- IP2 - yyy.yyy.yyy.yyy; Domains: domain4.tld, domain5.tld
- Primary domain - domain4.tld
- rDNS (must be FQDN) - whatever-you-want.domain4.tld
- domain5.tld will use "whatever-you-want.domain4.tld"
This is a simple way how rDNS works but there are several different solution what could be used.
- I often come to the conclusion that my brain has too many tabs open. -
Failing at desktop publishing & graphic design since 1994.
Thanks so it is find it I leave it like this for zDNS and PTR records ?
185.174.138.124.in-addr.arpa -> mail.domain.com
or should I leave it as 185.174.138.124.in-addr.arpa -> domain.com
Howdy,
You can do which ever you prefer. Most people set the reverse DNS record to the same as the hostname of the server though (or at least, the name that Postfix gives when connecting to another server).
That's not a requirement though, and it really comes down to what your needs are.
-Eric