Cyrus IMAP 3.1.9 Tag Notes
**************************

Unavailable for download as this is a development branch only.

Access is via git.

Warning: This should be considered for **testing purposes** and
  **bleeding- edge features** only. We will try to tag these snapshots
  at coherent development points, but there will generally be **large
  breaking changes** occurring between releases in this series.


Major changes since the 3.0.x series
====================================

* Sieve bug fixes and features.

* Caldav and Carddav improvements.

* Support for JMAP core protocol (**RFC 8620**).

* Support for JMAP Mail (**RFC 8621**).

* Experimental support for JMAP Contacts (requires
  *jmap_nonstandard_extensions: yes* in imapd.conf(5)).

* Experimental support for JMAP Calendars (requires
  *jmap_nonstandard_extensions: yes* in imapd.conf(5)).

* Xapian bug fixes.

* Improvements to Annotations handling.

* DRAC support has been deprecated.

* Support for Prometheus stats.

* Removed support for the Sphinx backend to squatter searches.

* New cyrus.index format v16 included since 3.1.5 - adds unseen
  count and createdmodseq to index header, savedate and createdmodseq
  to index records

* Support for WebSockets

* Support for HTTP/2.0

* Support for Zeroskip database format

* Intermediate mailboxes are now recorded in mailboxes database

* Conversations database format update - adds flags and internaldate
  fields, and is now versioned for future-compatibility.  You will
  need to rebuild your conversations databases with
  ctl_conversationsdb(8) and the *-b* switch to benefit from this.

* IMAP FETCH accepts two new data items, MAILBOXIDS and MAILBOXES,
  which respectively return the unique ids or names of the containing
  mailboxes of each message in the sequence (for best performance,
  rebuild your conversations databases as above)

* mbpath(8) is now much more useful

* Twoskip database format now supports shared locks

* All Cyrus binaries now use real sysexits exit codes instead of
  mapping nearly everything to EX_TEMPFAIL

* CyrusDB errors now syslog the actual error instead of just
  “cyrusdb error”

* New *allowdeleted* imapd.conf(5) option (default off), which
  allows admin users to see deleted mailboxes and expunged messages
  over IMAP

* cyr_virusscan(8) now supports custom templates for notifications
  sent about infected messages that have been deleted

* imapd.conf(5) options that represent a time duration now accept
  ‘d’, ‘h’, ‘m’, ‘s’ suffixes rather than arbitrary units.

* The *tls_server_cert* and *tls_server_key* imapd.conf(5) options
  now allow two certificate/key pairs (e.g. RSA and EC) to be used.
  Thanks Дилян Палаузов

* Mailbox create/delete/rename are now performed under a lock on the
  user’s namespace, to prevent races (especially during big renames).


Updates to default configuration
================================

* The *specialusealways* option is now enabled by default. It must
  explicitly be disabled for interoperability with legacy clients that
  can’t handle RFC 6154 attributes in extended LIST commands.

* The values accepted by *expunge_mode* have changed, please see the
  documentation for more information about the changes.

* The legacy GETANNOTATIONS/SETANNOTATIONS IMAP commands will no
  longer work unless *annotation_enable_legacy_commands* is enabled.

* The *outbox_sendlater* option and its functionality have been
  removed.


Security fixes
==============

* Contains fix for CVE-2017-14230

* Contains fix for CVE-2019-18928

* Contains fix for CVE-2019-19783


Significant bugfixes
====================

* Contains fix for Issue #2839
