MBOX-Line: From dave at cridland.net  Tue Apr 11 15:24:36 2006
To: imap-protocol@u.washington.edu
From: Dave Cridland <dave@cridland.net>
Date: Fri Jun  8 12:34:37 2018
Subject: [Imap-protocol] LIST Clarification
In-Reply-To: <Pine.WNT.4.65.0604111245200.3332@Tomobiki-Cho.CAC.Washington.EDU>
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Message-ID: <9875.1144794276.158704@peirce.dave.cridland.net>

On Tue Apr 11 20:46:19 2006, Mark Crispin wrote:
> On Tue, 11 Apr 2006, Tony Hansen wrote:
>> When 3501bis gets written, it'd be worth adding a note about this 
>> case.
> 
> I'm not convinced that we can, unless we can guarantee that there 
> is no implementation out there that does the nonsensical thing.

I don't think it's actually possible, because unless you do the 
sensible thing, then the result is a broken server.

Let's assume that we have two servers. Both consider only "INBOX" to 
be case insensitive, everything else is strictly case sensitive. Our 
client makes the same foolish assumption.

For one, we'll make INBOX not be a dual-use mailbox. This should make 
Mark happy. We'll call this A.

For the other, we'll make INBOX a dual-use mailbox. We shall call 
this B.

If they do the silly thing, then they are in the unfortunate position 
that should a client CREATE "InBox/foo", they have to return a LIST 
response for INBOX, and a list response for InBox, with different 
attributes.

Assuming this is not illegal in and of itself, does the client then 
have to treat INBOX and InBox as different names, one of which is 
case-insensitive?

In summary, I think you're safe to deprecate the practise.

Dave.
-- 
           You see things; and you say "Why?"
   But I dream things that never were; and I say "Why not?"
    - George Bernard Shaw

