Hi, I’m having problems sending email to anyone @ukaea.org.uk due to a dns
issue with one of our 2000 servers. When I perform and nslookup on
mail.ukaea.org.uk on the server it resolves to 194.128.63.76 but when I ran a
DNS lookup for ukaea.org.uk using one of many internet lookups it come back
with the below results:

Searching for ukaea.org.uk MX record at j.root-servers.net [192.58.128.30]:
Got referral to NS2.NIC.uk. [took 229 ms]
Searching for ukaea.org.uk MX record at NS2.NIC.uk. [217.79.164.131]: Got
referral to ns1-u.dns.pipex.net. [took 76 ms]
Searching for ukaea.org.uk MX record at ns1-u.dns.pipex.net.
[158.43.193.85]: Reports cluster-e.mailcontrol.com. [took 75 ms]

Answer:


Domain Type Class TTL Answer
ukaea.org.uk. MX IN 86400 cluster-e.mailcontrol.com. [Preference = 5]
ukaea.org.uk. MX IN 86400 cluster-j.mailcontrol.com. [Preference = 5]
ukaea.org.uk. NS IN 86400 ns0-u.dns.pipex.net.
ukaea.org.uk. NS IN 86400 ns1-u.dns.pipex.net.
ns1-u.dns.pipex.net. A IN 86400 158.43.193.85


As you can see the current MX look up for ukaea.org.uk is completely
different to that which is stored in the cached DNS on the server. I’ve
cleared the cache on the server using clear cache option and I’ve also
flushed the cache on the server from the command prompt. I even restarted the
server but it continually resolves to the wrong address.

I and utilising Secure cache against pollution and forwarders any on
resolving this would be appreciated.

Thanks!