network name 101100010100110.net
Steve Atkins
steve at blighty.com
Mon Oct 18 02:48:57 UTC 2010
On Oct 17, 2010, at 7:16 PM, James Hess wrote:
> On Sat, Oct 16, 2010 at 11:46 PM, Day Domes <daydomes at gmail.com> wrote:
>> I have been tasked with coming up with a new name for are transit data
>> network. I am thinking of using 101100010100110.net does anyone see
>> any issues with this?
>
> The domain-name starts with a digit, which is not really recommended, RFC 1034,
> due to the fact a valid actual hostname cannot start with a digit,
A valid actual hostname can start with a digit. Many do.
I'm guessing 3com may have had something to do with
that trend.
RFC 1123 2.1 clarified that a couple of decades ago, so I doubt
you'll find any running software that doesn't agree.
> and, for example,
> some MTAs/MUAs, that comply with earlier versions of standards still in use,
> will possibly have a problem sending e-mail to the flat domain, even
> if the actual hostname is
> something legal such as mail.101100010100110.net.
>
> Which goes back to one of the standard-provided definitions of domain
> name syntax used by RFC 821 page 29:
There are several less obsolete RFCs that specify email addresses,
they're all quite specific about what a valid hostname is in an email
sense. 5321 is the latest, I think, section 4.1.2.
Cheers,
Steve
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