Changes to the Cyrus IMAP Server

Changes to the Cyrus IMAP Server Since Version 1.4

• Implemented the "IMAP4rev1" protocol commands. (The hierarchical behavior of RENAME, which was added late to the IMAP4rev1 specification, is not implemented.) Changes the minor version number of the cyrus mailbox database format to 1. IMPORTANT: it is necessary to run the command "reconstruct -r" as the cyrus user after upgrading the Cyrus IMAP software from version 1.4 or earlier.
• If the file "msg/shutdown" exits in the configuration directory, the IMAP server will issue the first line in the file in an untagged BYE message and shut down.
• Permit SPACE in mailbox names.
• Permit the "modified UTF-7" internationalized mailbox name convention.
• "User opened mailbox" messages are now logged at the DEBUG level instead of the INFO level.
• Added -q (ignore quota) switch to deliver.
• New "krbck" program for diagnosing common kerberos problems.
• auth_unix no longer requires users to be in the passwd file.
• AUTHENTICATE command now reports the protection mechanism in use in the text of the tagged OK response
• Make MAILBOX_BADFORMAT and MAILBOX_NOTSUPPORTED temporary errors.
• Use the header cache for SEARCH HEADER
• Use "unspecified-domain" instead of server's hostname to fill out RFC 822 addresses without the "@domain" part.
• Make "reconstruct -r" with no args reconstruct every mailbox.
• The configure script now defaults to using unix_pwcheck instead of unix if the file /etc/shadow exists.
• The location of the pwcheck socket directory now defaults to "/var/ptclient/". It is controlled by the "--with-statedir=DIR" option, which defaults to "/var".
• Bug fix: by using an certain address form, one could deliver to a user's mailbox bypassing the ACL's.
• Bug fix: un-fold header lines when parsing for the ENVELOPE.
• Delete quota roots when deleting the last mailbox that uses them. Doesn't catch all cases, but should get over 99% of them.
• Implement plaintextloginpause configuration option, imposes artificial delay on plaintext password logins.
• Implement popminpoll configuration option, limits frequency of POP3 logins.
• Implement AFS PT server group support.
• Remove persistence of POP3 LAST value and remove Status: hack
• Support the new ACL command set in the IMAP server.
• Bug fix: Have to initialize reply to 0 in pop3d. Was causing POP3 server to occasionally drop the connection during authentication.
• Bug fix: The COPY command wasn't issuing a [TRYCREATE] when appropriate for sub-mailboxes of INBOX.
• Bug fix: Renaming a mailbox wasn't correctly changing its UIDVALIDITY.
• Bug fix: Renaming a mailbox to itself, in order to move it to a different partition, was not working correctly.
• Update the AUTH support in pop3d to conform to the latest draft specification.
• Update cyradm to use Tcl 7.5 instead of Tcl 7.4
• Re-implement large sections of the netnews support. It no longer requires modifications to INN, as it now expunges the index entries for expired/canceled articles upon select of the newsgroup.
• Implement newsspool configuration option, for separating the directories for the news spool and the various cyrus.* IMAP server index files.
• Bug fix: permit empty flag list in APPEND command
• Bug fix: deal with truncated Date: header values.
• Bug fix: memory mapping code, deal better with 0-length maps, since mmap() appears to crap out on that boundary condition.
• Portability fix: if no strerror, have to define NEED_SYS_ERRLIST.
• Bug fix: used append instead of lappend in cyradmin, preventing use of any port other than IMAP.
• When the client is streaming its commands, the IMAP server attempts to stream its tagged responses.
• Modify zephyr support to compile without Kerberos support.
• Add a bunch of prototype declararations to the code.
• In deliver, change the MULT support to instead use the LMTP syntax.
• imclient: support tagged intermediate replies and a default callback.
• Implement some experimental protocol extensions for optimizing disconnected use resynchronization. Most extensions are disabled by default. Client authors should contact info-cyrus@andrew.cmu.edu if they wish to experiment with these.
• In Makefiles, change $(AR) to ar -- HPUX make is defective.
• In deliver, use HAVE_LIBDB to select use of db over dbm
• Add map_stupidshared mapping module for older versions of Digital Unix. It's not quite as bad as HPUX, but...
• Bug fix: in imclient.c, don't free NULL pointers and don't call htons() on the output of getservbyname(). Have to abort sending the command if you get a tagged response when sending a literal.
• The auth_xxx routines now create/take a state argument instead of maintaining internal static state.
• Solaris mktime() is buggy in some releases. Create and use mkgmtime() for parsing date strings.
• Message parsing routines now use memory mapping, though they still copy data around in line-sized buffers.

Changes to the Cyrus IMAP Server Since Version 1.3

• Implemented the "reconstruct -m" command, for reconstructing the mailboxes file. IMPORTANT: it is necessary to run the command "reconstruct -m" as the cyrus user after upgrading the Cyrus IMAP software from version 1.3 or earlier. We recommend you make a backup copy of the mailboxes file in the configuration directory before performing the conversion.
• Mailbox names are now case sensitive, not case insensitive. "INBOX" is the exception, and is treated as being case-insensitive.
• Personal mailboxes now appear to their owners as being under the "INBOX." hierarchy. For example, the mailbox "user.bovik.work" appears to the user "bovik" as "INBOX.work". The user may still refer to the mailbox with the name "user.bovik.work".
• Previously, the code used "anybody" as the name of the group that all users are in, but the documentation used the name "anyone". Changed the code to match the documentation. The name "anybody" will be canonicalized to the name "anyone".
• The install document now gives different recommended locations for the server databases. The recommended location of the configuration directory changed from "/usr/cyrus" to "/var/imap" and the recommended location of the default partition directory changed from "/usr/spool/cyrus" to "/var/spool/imap". It is NOT necessary to change the locations of these directories when upgrading from version 1.3 or earlier of the Cyrus IMAP server software. If you do wish to change the locations of these directories to match the new recommendations, simply rename the directories and change the appropriate values in your /etc/imapd.conf file.
• Created a "make install" rule. See the installation document for all the new corresponding configure options. Note the recommended location of the "imapd", "pop3d", and "deliver" programs has changed, this change needs to be reflected in the "inetd.conf" and "sendmail.cf" files.
• New "login_unix_pwcheck" module and "pwcheck" daemon, for improved shadow password support. See the "pwcheck/README.pwcheck" file in the distribution for details.
• Renamed the "login_unix_shadow" module to "login_unix_getspnam".
• Added a mail notification mechanism, using Zephyr.
• Added a feature to automatically create user IMAP accounts. Controlled by the "autocreatequota" config option.
• Added the "logtimestamps" config option, for putting timestamp information into protocol telemetry logs.
• Beefed up the Kerberos checks in Configure to ensure the DES library routines exist.
• On some systems, the "echo" command with no arguments emits a newline. Changed the installation document to instead use the "true" command to create the "mailboxes" file.
• Store a redundant copy of a mailbox's ACL in the cyrus.header file, so "reconstruct -m" may later use it as a backup.
• Had to remove the declaration of tcl_RcFileName for the latest version of Tcl.
• Make much more extensive use of memory mapping. Replace the binary search module with one that searches a memory mapped area.
• Replaced the yacc-based RFC822 address parser with a hand-coded one.
• Replaced the et (error table) libary with a version that doesn't require lex or yacc. Remove the lex/yacc checking from Configure.
• Safety feature: most programs now refuse to run as root.
• Bug fix: Issue [TRYCREATE] tag on COPY command when appropriate.
• Bug fix: The quoted-printable decoder wasn't ignoring trailing whitespace, as required by MIME.
• Bug fix: Don't spew cascade errors if the server gets an EOF during/after reading an APPEND literal.
• Bug fix: gmtmoff_gmtime.c was returning results with the wrong sign.
• Bug fix: imclient_send was appending spaces to %d and %u and the response parser was not handling responses that did not contain a space after the keyword.
• Bug fix: rmnews wasn't removing some (un-indexed) article files correctly.
• Completely disabled the dropoff code for now. It will be completely replaced when IMSP integration is implemented
• Added workaround for the Linux mkdir() problem.
• In Configure, use a more direct test for a working shared-memory mmap
• In collectnews, avoid O(n**2) behavior when processing articles that have already expired.
• Bug fix: append_addseen() would screw up if no messages were previously seen.
• Added the CMU-specific amssync and cmulocal directories.
• Use memmove instead of bcopy.
• Implemented the first pass of SMTP/MULT support in deliver.
• Added cacheid parameter to auth_setid(), for AFS PT server support.

Changes to the Cyrus IMAP Server Since Version 1.2

• Fixed bug in character set code that broke text searches. Sites which care about searching headers need to reconstruct their existing mailboxes.

Changes to the Cyrus IMAP Server Since Version 1.1-Beta

• Add support for UIDVALIDITY special information token.
• Add syncnews and arbitron programs.
• Redo duplicate delivery elimination in deliver.
• Bug fixed: Must re-read files after acquiring a lock. Cannot trust the mtime of a file to increment when writing the file--file could be written to multiple times in the same second.
• Bug fixed: EXAMINE command should not affect \Recent status.
• Update the user's \Recent high-water-mark when we report new messages.
• Portability changes
• Upgrade to autoconf 2.1
• Allow privacy to be turned off at compile-time with --disable-privacy configure switch.
• Fix typo in cyradm preventing "all" from being recognized.
• Include map_private.c memory mapping module for systems like HPUX which have half-working mmap() implementations.
• Switch to using UTF-8 for internal search format. Sites which care about internationalized searching of headers need to reconstruct all their existing mailboxes.
• Fix some errors in the iso-8859-* tables.
• Add and correct a bunch of case-independence mappings in the character tables.
• First pass at implementing the STATUS extension; disabled for release.
• First pass at implementing IMAP/IMSP server integration. Not ready for general use.
• Add new_cred and free_cred mechanisms to authentication modules.
• Don't complain when doing "reconstruct -r foo" and foo isn't a mailbox.
• Add IMAP_QUOTAROOT_NONEXISTENT error code.
• Bug fix: Avoid divide by zero when quota is zero
• Bug fix: In an error case of the ACL handling code, we have to restore tab before breaking out of loop.
• Fix file descriptor leak in quota system.
• Change a bunch of int variables to unsigned.
• Better error reporting on reads that end up short.

Changes to the Cyrus IMAP Server Since Version 1.0-Beta

• Improved installation document.
• New "cyradm" administrative client.
• Changed the syslog facility from "local4" to "local6".
• Removed the renounce setuid check in "deliver". The "deliver" program must now be non-executable by other.
• Fixed a typo in the parsing of SEARCH DELETED. (This bug constantly got tripped by newer C-clients.)
• Redesigned the implementation of SEARCH CHARSET.
  Sites that wish to search for non-ASCII characters in the headers of existing mailboxes must run reconstruct on all their mailboxes after upgrading to this version.
• Added AUTH and KPOP support to the POP3 server.
• Added search support for the ISO-2022-JP character set.
• Replaced the search engine with a partial Boyer-Moore algorithm.
• Special-case optimized searching US-ASCII text.
• Fixed a bug which caused the message parser to spin-loop on a particular degenerate invalid-MIME case.
• Fixed a performance bug in the message parser.
• Tracked last-minute changes to the IMAP4 protocol.
• Fixed a bug in UNSUBSCRIBE which caused too many subscriptions to be removed.
• Added a bunch more "configure" options.
• Ported to HPUX.
• Fixed a bug in the LIST/LSUB \Noselect code.
• Fixed bug in the globbing code which caused the "*%" pattern to work incorrectly.
• Client-side Kerberos support is now conditionalized on HAVE_ACTE_KRB, which is set by configure.
• Fixed some invalid buffer-alignment assumptions in the Kerberos code.
• Made the lexers compatible with flex. Configure now looks for and prefers to use flex and bison/byacc.
• Made the IMAP server check for the existence of the mailboxes file upon startup, in order to give a more informative error message for this common configuration error.
• Fixed other minor bugs.

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