I am trying to clarify my Reverse DNS PTR lookup for a domain. I have a server with a single IP addresses and multiple accounts, all sharing that IP address;

My PTR is currently:

 24.210.31.in-addr.arpa. 14400 IN PTR domainname.co.uk.

But the domain that the IP address reverses to is ns1.domainnetwork.co.uk, therefore should the PTR record on the account reference the primary returned domain rather than the account domain?

I can't seem to find any clear guidance on this with Google searching, however this question did seem to suggest that the account should reference the server domain rather than the account specific domain.

So, would having :

24.210.31.in-addr.arpa. 14400 IN PTR ns1.domainnetwork.co.uk.

in the DNS for the account give it a valid PTR record, even though this doesn't mention the account domain at all?

Edit: To clarify, the ns1.domainnetwork.co.uk is the primary name server for the domain.

UPDATE + EDIT

I have a persistent issue with this topic, and felt it best to resurrect this incompleted query than to start a new one from scratch.

All the above still holds true.

I have a server with various domains, on an IP address .xx.xx.xx.236 and xx.xx.xx.238 . I also have a single domain on its own IP address just for that doman (for the TLS certificate), which is xx.xx.xx.241 but I can't get that domain to correctly show a vaid PTR record in the DNS.

A domain on the server that works (ip address 12.34.56.236 ):

websitename.co.uk       14400 IN  A  12.34.55.236
55.34.12.in-addr.arpa.  14400 IN PTR nameserver1.network.co.uk.

the above works and gives a valid PTR feedback.

The nameserver1.network.co.uk. is the same primary name server as the domain which sits on its own IP address (12.34.56.241) but which never gives a correct PTR record.

The domain that does not give out a valid PTR record (unique IP address):

websitenameTwo.co.uk    14400 IN  A  12.34.55.241
55.34.12.in-addr.arpa.  14400 IN PTR nameserver1.network.co.uk.

What Am I missing to make this record have a valid PTR DNS record?

As I understand it, an IP address-owner can set up a DNS PTR record for his IP address to map the IP addresses to its host names. There are some things about this I don’t understand. I’ve managed other DNS records often using web based interfaces, but never seen PTR records exposed in those.

A DNS record of type CNAME or A is stored in the DNS zone for a specific domain such as example.com. Are the PTR records pointing at example.com typically stored in the same zone or are they stored in separate zones? If the PTR record is stored in the same zone as as example.com, how does other servers know to query this zone for the PTR record?

What stops me from adding a PTR record saying that <ip-address-of-my-server> resolves to, say, gmail.com? If I manage the PTR records for my IP address, shouldn't I be able to add anything?

My hosting provider already did PTR setup. Now i have to setup it at my DNS holder i guess. What am i supposed to do at my Godaddy account. thank you.

my ip : 64.250.113.235

and you can check my ptr record from here

http://mxkit.com/webmaster-tools/ptr-check

result

Ptr records for 64.250.113.235 are: Server: 10.0.80.11 Address: 10.0.80.11#53

Non-authoritative answer: 235.113.250.64.in-addr.arpa name = notification.pokemoncraft.com.

I host multiple domains on a single IP address:

cats.com 
A @ --> 10.20.30.40
A mail --> 10.20.30.40
MX @ --> mail

dogs.com
A @ --> 10.20.30.40
A mail --> 10.20.30.40
MX @ --> mail

I need to set up a PTR record for the IP address. This is so that forward-confirmed reverse DNS will succeed for other mail servers.

DNS query type PTR on 10.20.30.40 --> returns PTR-record="cats.com" (1 result)
DNS query type A on "cats.com" --> returns A-record=10.20.30.40 (1 result)

If I can only have one PTR record for my IP, that points to cats.com, how will FCrDNS ever succeed for dogs.com?

Can I just use the domain name they both share (80.70.60.50.static.host.net) in the PTR ?

Thanks!

I need to check a PTR record to make sure that a script I have is sending emails which will actually be received by my users and not be incorrectly marked as spam.

I understand that the ISP which owns the IP range has to set up the PTR record, but how do I check if it is already set up?