On 06/02/19 17:36, Patton, Matthew [Contractor] wrote:
In Internet-connected SMTP (which is something like 99.99999% of
installations) ... The number of people who run mail servers isolated
from the Internet is vanishingly small. Why cater to the oddball
environment where anything goes?
...
Technically that is a violation. The hostname is and always has been
defined as being UPTO the first dot.
This is absolutely incorrect. A hostname is an identifier for a machine
or node on a network. When that network is a local network the hostname
absolutely can be a single word. When that network is the internet then
a fully qualified domain name is *required* to identify a host.
considering that above you make it blatantly obvious that you are
referring to usage on the internet at large and not usage on a local
network then it is absolutely appropriate for the referenced hostname to
be a FQDN in this context.
https://en.wikipedia.org/wiki/Hostname
RFC952
Peter
