From: Noel Jones (njonesmegan.vbhcs.org)
Date: Wed Oct 01 2008 - 13:30:40 CDT

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mouss wrote:
> Noel Jones wrote:
>> Welcome to postfix!
>>
>> Valid hostnames in mail are not the same as valid DNS hostnames.
>> Mail hostnames never end with a dot.
>
> Does DNS even define a "hostname"? My understanding is that this is a
> "natural" term, not a technically defined one (after all, on many
> systems, the "hostname" is not FQDN, et names like "foo_bar" are ok,
> eventhough they can't be used as "mail" hostnames).

An interesting observation. Yes, I believe the dozens of DNS
related RFCs mostly talk about "domain name" (aka. FQDN) and
"host address" (referring to the IP) rather than "hostname",
but this is getting sufficiently OT that I don't really care.

--
Noel Jones

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