Re: [exim] Detecting the Registrar Barrier

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著者: Andrew - Supernews
日付:  
To: exim-users @ exim. org
題目: Re: [exim] Detecting the Registrar Barrier
>>>>> "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This was superseded long ago: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.


--
Andrew, Supernews
http://www.supernews.com