Mail servername and ptr

[willoriker]

SYSTEM INFORMATION
OS type and version	22.04
Webmin version	2.021
Virtualmin version	7.7
Related packages	SUGGESTED
good days to everybody
this is my first time with virtualmin, and i am so impress, in the past, i use another control panel , and , offcourse, thing were diferent.
now i have a doubt.
in the past. my previous server always use the tld servername for mail server name, and i set ( my isp really) set my PTR with the same tld (HOSTNAME)
but, actually, i have the chance to use personal mail server mail for each virtual machine
and if i have 50 diferent virtual machine with 50 diferent domain, i going to have 50 diferent mail server.
but i only can select ONE PTR record. how can i select?
do i need to use hostname too?
why?
tx in advance

[Joe]

@willoriker

but i only can select ONE PTR record.

Of course you can only select one (per IP address). It’s mapping an IP address to a name. It doesn’t make sense to have one IP map to many names.

@willoriker

how can i select?

It doesn’t matter.

As long as you have a PTR record and that record resolves to a name that resolves back to the same IP, you’re done with PTR! Don’t make it complicated. The PTR does not even need to point to a name you control. Many hosts have a default PTR record for every IP, and that’s also fine! People sometimes have cosmetic preference for a domain that is hosted on the system, and that’s also fine.

But, don’t make PTR records complicated. You need one, it has to resolve to a name, and that name has to resolve back to your IP. That’s it!