<?xml version='1.0'?>

<reference anchor='RFC2342'>

<front>
<title>IMAP4 Namespace</title>
<author initials='M.' surname='Gahrns' fullname='Mike Gahrns'>
<organization>Microsoft</organization>
<address>
<postal>
<street>One Microsoft Way</street>
<city>Redmond</city>
<region>WA</region>
<code>98072</code></postal>
<phone>(425) 936-9833</phone>
<email>mikega@microsoft.com</email></address></author>
<author initials='C.' surname='Newman' fullname='Chris Newman'>
<organization>Innosoft International, Inc.</organization>
<address>
<postal>
<street>1050 East Garvey Ave. South</street>
<city>West Covina</city>
<region>CA</region>
<code>91790</code></postal>
<email>chris.newman@innosoft.com</email></address></author>
<date month='May' year='1998' />
<area>Applications</area>
<keyword>internet message access protocol</keyword>
<abstract>
<t>

   IMAP4 [RFC-2060] does not define a default server namespace. As a

   result, two common namespace models have evolved:


<list>
<t>

   The "Personal Mailbox" model, in which the default namespace that is

   presented consists of only the user's personal mailboxes. To access

   shared mailboxes, the user must use an escape mechanism to reach

   another namespace.

</t>
<t>

   The "Complete Hierarchy" model, in which the default namespace that

   is presented includes the user's personal mailboxes along with any

   other mailboxes they have access to.
</t></list></t>
<t>


   These two models, create difficulties for certain client operations.

   This document defines a NAMESPACE command that allows a client to

   discover the prefixes of namespaces used by a server for personal

   mailboxes, other users' mailboxes, and shared mailboxes.  This allows

   a client to avoid much of the manual user configuration that is now

   necessary when mixing and matching IMAP4 clients and servers.
</t></abstract></front>

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