Odd Reverse DNS Hostname

[#1]

I use IRC quite often and on connect the server resolves your IP address hostname and displays it but I received a slightly different hostname to normal.
Host: mail.kyles-on-scotland.co.uk
IP: 81.174.183.53
Didn't know if this is intended or perhaps this IP address shouldn't be in the dynamic pool.

[#2]

that is certainly odd as going to it gives this https://mail.kyles-on-scotland.co.uk/Remote/logon.aspx?ReturnUrl=%2fremote%2fdefault.aspx

[#3]

suspect it's probably an old rdns entry from a static ip. needs removing.

[#4]

That's probably most likely, as with our old static IP it's still on a custom rDNS entry (currently waiting for someone to action the removal).

[#5]

I'm getting it looked into from here.

[#6]

Is this any help
checking name shows :-
Non-authoritative answer:
Name:  mail.kyles-on-scotland.co.uk
Address: 31.216.1.240
checking ip address shows :-
Non-authoritative answer:
53.183.174.81.in-addr.arpa      name = mail.kyles-on-scotland.co.uk.
Authoritative answers can be found from:
183.174.81.in-addr.arpa nameserver = ns1.force9.net.
183.174.81.in-addr.arpa nameserver = ns2.force9.net.
Cheers.. 

[#7]

Looks like that the rDNS on static IPs which have been moved hasn't been updated / reset.
Could be a one off, but given the recent blunder where static IPs had all their rDNS reset to defaults, I'm going to so blunder again.