[Tickets #6984] Re: pb showing folders named INBOX.*

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Ticket URL: http://bugs.horde.org/ticket/6984
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  Ticket             | 6984
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | pb showing folders named INBOX.*
  Queue              | IMP
  Version            | HEAD
  Type               | Bug
-State              | Unconfirmed
+State              | Feedback
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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Michael Slusarz <slusarz at horde.org> (2008-06-27 13:23) wrote:

> I have a folder called ".INBOX.Sent"

How is that a legal mailbox name?  In that mailbox, your base  
namespace would necessarily have to be '' (blank).  As such, that  
mailbox is correctly identified as 'INBOX.Sent', NOT '.INBOX.Sent'.   
You simply *can't* have an empty mailbox name.  See RFC 3501 [7.2.2]:

     The hierarchy delimiter is a character used to delimit levels of  
hierarchy in a mailbox name.

By definition, a mailbox name is *1* or more characters.  See RFC 3501 [9]:
mailbox         = "INBOX" / astring
astring         = 1*ASTRING-CHAR / string
ASTRING-CHAR   = ATOM-CHAR / resp-specials

Additionally, this mailbox requires that its parent is the mailbox ''.  
  However, that mailbox name is reserved by list as a method to  
determine what the hierarchy delimiter is for a given reference (RFC  
3501 [6.3.8]):

       An empty ("" string) mailbox name argument is a special request to
       return the hierarchy delimiter and the root name of the name given
       in the reference.

Your mailbox is invalid.  I don't see a need to workaround invalid  
mailbox names.  I don't care if other mail programs can handle it or  
not either.