IMAP Copyright Notice and Release Notes

 * Program: IMAP4rev1 server
 *
 * Author:  Mark Crispin
 *          Networks and Distributed Computing
 *          Computing & Communications
 *          University of Washington
 *          Administration Building, AG-44
 *          Seattle, WA  98195
 *          Internet: MRC@CAC.Washington.EDU
 *
 * Date:    5 November 1990
 * Last Edited:   8 September 1998
 *
 * Copyright 1998 by the University of Washington
 *
 *  Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appears in all copies and that both the
 * above copyright notice and this permission notice appear in supporting
 * documentation, and that the name of the University of Washington not be
 * used in advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission.  This software is made
 * available "as is", and
 * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
 * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
 * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
 * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


imap-4.4 is a maintenace update.  It fixes the following bugs in imap-4.3,
which was distributed with Pine 4.03:
 1) international character searching did not handle MIME2 headers properly
 2) crashes if the first UID in a UID sequence range did not correspond to a
     message
 3) no messages selected if neither UID in a UID sequence range corresponded
     to a message
 4) memory leak in local news spool access each time the ACTIVE file was
     scanned for a valid news group.

This version supports IMAP4rev1 (RFC 2060).  There are major internal and
external changes from the IMAP2bis version (e.g. imap-3.6, distributed with
Pine 3.9x).  It is extremely unlikely that a program written for the IMAP2bis
verion will build with this version without modifications.  Drivers written
for the IMAP2bis version will definitely need to be rewritten.

Most notable operational changes from imap-3.x:
 . SASL authentication is supported in the IMAP and POP3 servers, and in
    the IMAP, POP3, and SMTP client code.  There is no support for NNTP
    SASL yet
 . Kerberos V5 is supported through the GSSAPI on UNIX and NT.  To enable
    Kerberos V5 on UNIX, add "gss" to the EXTRAAUTHENTICATORS list in the
    top-level Makefile and rebuild.  You may also need to edit the GSSAPI
    directory paths in the ../src/osdep/unix/Makefile
 . Kerberos V4 client-only contributed code is supplied, but is unsupported
 . The mbox driver is now enabled by default.  If the file "mbox" exists on
    the user's home directory and is in UNIX mailbox format, then when INBOX
    is opened this file will be selected as INBOX instead of the mail spool
    file.  Messages will be automatically transferred from the mail spool file
    into the mbox file
   To disable this behavior, delete "mbox" from the EXTRADRIVERS list in the
    top-level Makefile and rebuild
 . IMAP4rev1 protocol is now supported.  The UNIX format support now maintains
    unique identifiers (UIDs) and keyword flags for each message, and keeps an
    invisible message at the start of the file which contains the UID base
    information and a list of assigned keywords.  There is no way to disable
    this behavior, since it would disable IMAP4rev1 support.  This message may
    show up if you access the mailbox as a file using older mail software (e.g.
    Pine 3.9x).  It is invisible with IMAP or POP access, or with access as a
    file using Pine 4.0x.
 . Support for additional mailbox formats
 . No longer keeps entire mailbox in memory for UNIX format files
 . Multilingual searching of the following charsets are supported:
	US-ASCII, UTF-8, ISO-8859-1, ISO-8859-2, ISO-8859-3, ISO-8859-4,
	ISO-8859-5, ISO-8859-6, ISO-8859-7, ISO-8859-8, ISO-8859-9,
	ISO-8859-10, ISO-8859-13, ISO-8859-15,
	ISO-2022-JP, ISO-2022-KR, ISO-2022-CN, ISO-2022-JP-1, ISO-2022-JP-2,
	GB2312 (alias CN-GB), CN-GB-12345, BIG5 (alias CN-BIG5),
	EUC-JP, EUC-KR, Shift_JIS,
	KOI8-R, KOI8-U (alias KOI8-RU), TIS-620, VISCII.
   All ISO-2022-?? charsets are treated identically, and support ASCII,
    JIS Roman, hankaku katakana, ISO-8859-[1 - 10], TIS, GB 2312, JIS X 0208,
    JIS X 0212, KSC 5601, and planes 1 and 2 of CNS 11643.
   EUC-JP includes support for JIS X 0212 and hankaku katakana
 . Fast sorting including IMAP server-based sort
 . Fast ordered-subject threading including IMAP server-based threading


Most notable programmer/external changes from imap-3.x:
 . Additional ports
 . New directory orientation, no separate non-ANSI sources
 . New local file formats mbx and mx
 . The bezerk driver has been retired, and replaced with the new unix driver
    which does not keep a snapshot in memory
 . Many new added ports including NT (Win32 client, NT server)
 . Many new data access functions
 . Numerous interface changes; look at the .h files for details
 . There are no known security problems in this version
 . If you ignored the warnings and used the evil configuration file, its name
    and contents have changed incompatibly