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From "Robert Burrell Donkin (JIRA)" <server-...@james.apache.org>
Subject [jira] Commented: (IMAP-73) Support RFC 3348
Date Mon, 06 Apr 2009 11:40:13 GMT

    [ https://issues.apache.org/jira/browse/IMAP-73?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12696044#action_12696044
] 

Robert Burrell Donkin commented on IMAP-73:
-------------------------------------------

>From RFC3348:

<blockquote cite='http://www.isi.edu/in-notes/rfc3348.txt'>
   \HasNoChildren - The presence of this attribute indicates that the
   mailbox has NO child mailboxes that are accessible to the currently
   authenticated user.  If a mailbox has the \Noinferiors attribute, the
   \HasNoChildren attribute is redundant and SHOULD be omitted in the
   LIST response.

   In some instances a server that supports the CHILDREN extension MAY
   NOT be able to determine whether a mailbox has children.  For example
   it may have difficulty determining whether there are child mailboxes
   when LISTing mailboxes while operating in a particular namespace.

   In these cases, a server MAY exclude both the \HasChildren and
   \HasNoChildren attributes in the LIST response.  As such, a client
   can not make any assumptions about whether a mailbox has children
   based upon the absence of a single attribute.

   It is an error for the server to return both a \HasChildren and a
   \HasNoChildren attribute in a LIST response.
</blockquote>

> Support RFC 3348
> ----------------
>
>                 Key: IMAP-73
>                 URL: https://issues.apache.org/jira/browse/IMAP-73
>             Project: JAMES Imap
>          Issue Type: New Feature
>          Components: Mailbox, Protocol
>    Affects Versions: 0.1
>            Reporter: Robert Burrell Donkin
>             Fix For: 0.1
>
>
> RFC 3348 describes an extension to IMAP which allows clients to determine whether a mailbox
has a child without an expensive general LIST operation

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