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At 15:40 02-07-2008, John C Klensin wrote:
Now, for example, I happen to believe that "one-off typing error is guaranteed to yield a false positive", is a more than sufficient _technical_ basis to ban single-alphabetic-letter domains at either the top or second levels and to advise lower-level domains against their use. Those are technical grounds based on human interface design and information retrieval principles, not "the network will break if that is done". But few of the recommendations or reservations we might
Some people may question a technical recommendation that is not based on "the network will break".
make fall into that network-breaking latter category. Even some of those that fall closest to the line involve cases that we could "fix" by modifying our applications protocols to lexically distinguish between domain names and address literals (http://[10.0.0.6]/ anyone?).
Or wait for http://[2001:1890:1112:1::20]/ to catch up.
But, should those of us who believe that single-letter domains are bad news refrain from advocating for that rule because those who oppose it could use it to discredit other IETF recommendations that might be more important? I don't know
That's a question to consider before getting into any rule-making.
The rather odd phrasing there has been the source of a lot of discussion in the past in both selected IETF and ICANN circles. Some of us read it as "TLDs will be alphabetic only -- no digits", not just "cannot be all digits". The former was certainly the IANA intent when we were discussing RFC 1591. But does it apply today? Can ICANN override it? I can assure you that there are groups within ICANN who believe that they can.
RFC 1591 has been swept away by the changes that have taken placed since then. By making a few changes to RFC 5241, we could have a document relevant to this topic. :-)
At 16:23 02-07-2008, Mark Andrews wrote:
No sane TLD operator can expect "http://tld" or "user at tld"
to work reliably. I suspect there are still mail configuations
around that will re-write "user at tld" to "user at tld.ARPA".
http://museum/
Should we be writting a RFC which states that MX and address
records SHOULD NOT be added to the apex of a TLD zone?
The above TLD has an address record.
Should we be writting a RFC which states that single label
hostnames/mail domains SHOULD NOT be looked up "as is" in
the DNS?
There was a ccTLD operator who expressed the wish for such mail domains. Regards,-sm
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