Cyrus IMAP 3.0.0 rc2 Release Notes


Cyrus IMAP 3.0 is under active development, and subject to change.

Do NOT use this version unless you're a developer of sorts.

Download from GitHub:

Major changes since the 2.5.x series

  • The source repository has moved to GitHub, Bugzilla and Phabricator have been deprecated. Their issue lists are being imported into GitHub.

  • Support added for FastMail-style conversations (threaded messages). (See the conversations options in imapd.conf)

  • Optional Xapian integration for faster and shinier search. Note that this requires custom patches to Xapian, in this release. (See the search_engine option in imapd.conf, and doc/README.xapian in the source distribution.)) Compiling Xapian support requires gcc 4.9 or later.

  • Archive support has arrived! Requires addition of an archive partition. (See archive_* options in imapd.conf)

  • Basic JMAP support. (See httpmodules in imapd.conf)

  • ClamAV integration for AntiVirus support is now working again.

  • Dropped support for Berkeley DB.

  • The handling of configure options has changed, dropping support for --with-cyrus-prefix and --with-service-path in favour of the more conventional --prefix, --bindir, --sbindir, and --libexecdir.

  • Binaries executed by the master(8) service process are now installed to --libexecdir. Other binaries are installed to --bindir and/or --sbindir.

    The make installbinsymlinks target can be used to set up symlinks to everything in --bindir, if you need that in your environment.

  • Added support for replicating mailboxes/users to a particular partition. sync_client now accepts a -p option.

  • The defaultdomain setting in imapd.conf now defaults to "internal" (was: NULL)

  • Added experimental backup service. See Cyrus Backups

  • Support for Apple's Push service (XAPPLEPUSH). See Cyrus Eventsource

  • Sieve now supports special use folders. See Cyrus Sieve

  • Sieve now supports the following extensions:

    • RFC 5490 Checking Mailbox Status and Accessing Mailbox Metadata

    • RFC 5229 Variables

  • Sieve bytecode is now automatically recompiled when it is detected to be missing or out of date

  • New numeric header available for sorting: X-Spam-Score

  • Added IMIP notification support to notifyd(8). See imipnotifier in imapd.conf

  • Optimised CRC32 implementation

  • Added support for reverse ACLs, enabling faster LIST response. See reverseacls in imapd.conf

  • Added cross-domain sharing support. See crossdomains and crossdomains_onlyother in imapd.conf

  • Added experimental object storage for mail data, with preliminary support for OpenIO and Caringo backends. See --enable-objectstore, and the object_storage_*, openio_* and caringo_* options in imapd.conf.

  • Configurable POP3 UIDL format for compatibility with other mail servers. Supports Courier Mail Server and Dovecot formats, in addition to Cyrus formats. See uidl_format in imapd.conf

  • Under delete_mode: delayed, only the 20 most recently deleted mailboxes are kept for any given name.

  • Documentation cleanup: we are moving toward having a single restructured text source for man pages and html/text documentation, which are pre-generated for inclusion in release tarballs. If you wish to rebuild these, or are building from a git clone in which they are not pregenerated, you will need to install sphinx-build, and the perl module Pod::POM::View::Restructured. The top level Makefile now has man and doc targets for building these.

  • Added support for OpenSSL 1.1.0.

  • Replication now supports incremental partial updates, so massive updates (such as mail imports) won't stall replication for other users. See sync_batchsize in imapd.conf

  • The mailbox cache minor version has been incremented to store a GUID for each body part.

Updates to default configuration

  • unixhierarchysep (/) is now on by default (instead of netnews style .)

  • altnamespace is now on by default (was off)

  • virtdomains is actually still off by default. (Previously we stated it was now defaulting to userid: this was an error. )

Significant bugfixes

  • Lots of fixes to caldav and carddav.

    Includes the addition of a new daemon (calalarmd) which periodically processes a global database containing the "next" alarm for each item, and sends the relevant mboxevents. (See --with-calalarmd)

  • Replication reliability fixes.

  • Improved LIST-EXTENDED: more imap tests now succeed.

  • Extensive cleanup of mailbox name handling

  • master now requests a sane maximum number of open file descriptors, and only complains if this isn't allowed.

  • Fixes to compiling on Solaris (thanks Jens Erat, Marty Lee)

  • Improved handling of mailbox renames during replication