Re: [exim] Detecting the Registrar Barrier

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Autor: Ted Cooper
Datum:  
To: exim-users @ exim. org
Betreff: Re: [exim] Detecting the Registrar Barrier
Andrew - Supernews wrote:
>>>>>> "Ted" == Ted Cooper <eximX1211@???> writes:
>
> > Martin A. Brooks wrote:
> >> Ted Cooper wrote:
> >>> Hmm.. this also doesn't take into account illegal hostnames such as
> >>> those with bits starting with digits
> >>
> >> There's nothing illegal about using numbers to start part of a
> >> domain name. http://www.888.com/
>
> Ted> RFC 1035
>
> Ted> The labels must follow the rules for ARPANET host names. They
> Ted> must start with a letter, end with a letter or digit, and have
> Ted> as interior characters only letters, digits, and hyphen. There
> Ted> are also some restrictions on the length. Labels must be 63
> Ted> characters or less.
>
> This was superseded long ago:
>
> RFC 1123:
>
> 2.1 Host Names and Numbers
>
>       The syntax of a legal Internet host name was specified in RFC-952
>       [DNS:4].  One aspect of host name syntax is hereby changed: the
>       restriction on the first character is relaxed to allow either a
>       letter or a digit.  Host software MUST support this more liberal
>       syntax.


Woops! Oh well, live and learn :)


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