On 07/06/13 23:29, Mark Goodge wrote:
On 07/06/2013 14:16, Nikolas Kallis wrote:
On 07/06/13 23:11, Mark Goodge wrote:
On 07/06/2013 14:06, Nikolas Kallis wrote:
Hello,
I just got an unsolicited e-mail from the domain 'bbbmail.com',
which is
hosted at '46.235.78.1'.
'46.235.78.1' does not resolve to a host name, therefore 'bbbmail.com'
is not a FQDN.
'bbbmail.com' is a fully qualified domain name. That is completely
irrelevant to the question of whether the source IP address resolves to
a host name.
Mark
I thought for a domain to be fully qualified, it must have a PTR record
setup for it?
No, not at all. There are many FQDNs which don't have PTR records, and
there is no requirement for a 1:1 correspondance between FQDNs, IP
addresses, A records and PTR records.
Mark
You are right. Up until a couple of hours ago I believed what you said
was true, but a couple of hours ago something led me to believe
different. Thanks for the clarification.
