[dns-operations] dotless domains

Jim Reid jim at rfc1035.com
Fri Sep 21 09:28:10 UTC 2012

On 21 Sep 2012, at 10:07, Bart Smit wrote:

> Phil Regnauld wrote:
>> Surprised no one's brought up http://dk/ as an already existing  
>> scenario
>> that doesn't work (try it in various browsers).
> Bad example. The first *four* browsers I tried (firefox, chrome,  
> safari,
> and opera on osx) handle this perfectly.

Who cares? It's not about which flavour-of-the-month browsers handle  
this and which ones don't.

It's already clear that address records in TLDs lead to unpredictable  
behaviour. The mutually exclusive results you and Phil got prove this.  
So it just doesn't matter if it's particular versions of particular  
browsers that are at fault; or the (configuration) of their stub  
resolvers; or the local DNS setup; or something else in the underlying  
OS. The outcome is the same.

BTW, I used to have an email address of j@?? at a ccTLD. Its DNS admin  
had sneaked in an A record for just that purpose. [The registry  
database wouldn't add MX records.] However very few MTAs and MUAs were  
able to handle this email address correctly.

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