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Marketing people wants to print the domain name in mixed case. I am kinda in doubt with this- any chance would cause technical issue?

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Make sure your marketing people are aware that people will ignore their capitalisation, which could lead to the proverbial "ExpertsExchange" and "PenIsland" domain problems. –  crb Jan 7 '10 at 11:40
    
You know I had never looked at the domain name expersexchange like that, but know I can never look at it without thinking of this :P Not that it is a useful site, of course... –  wzzrd Jan 7 '10 at 11:52
    
I refer to it as "Expert Sexchange" in my head. I absolutely refuse to register for that crap, and it irritates me how high they tend to rank in Google results. –  Satanicpuppy Jan 7 '10 at 14:45
    
LOL.... I don't get PenIsland at first... but then whatever if you use camel case or not doesn't really help. –  goodwill Jan 9 '10 at 12:51
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1 Answer

up vote 13 down vote accepted

No, not a problem. As per RFC 1035 section 2.3.3, all parts of the DNS that are part of the official protocol, all comparisons between character strings (e.g., labels, domain names, etc.) are done in a case-insensitive manner.

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your answer is probably correct- I just want to see if practically there are some situations where the upper case will actually cause problem when the software is not written correctly? –  goodwill Jan 9 '10 at 12:50
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