Dovecot release v2.3.7

[Aki Tuomi]

Hi!

We are pleased to release Dovecot release v2.3.7.

Tarball is available at

https://dovecot.org/releases/2.3/dovecot-2.3.7.tar.gz
https://dovecot.org/releases/2.3/dovecot-2.3.7.tar.gz.sig

Binary packages are available at https://repo.dovecot.org/

Changes
-------

* fts-solr: Removed break-imap-search parameter
+ Added more events for the new statistics, see
  https://doc.dovecot.org/admin_manual/list_of_events/
+ mail-lua: Add IMAP metadata accessors, see
  https://doc.dovecot.org/admin_manual/lua/
+ Add event exporters that allow exporting raw events to log files and
  external systems, see
  https://doc.dovecot.org/configuration_manual/event_export/
+ SNIPPET is now PREVIEW and size has been increased to 200 characters.
+ Add body option to fts_enforced. This triggers building FTS index only
  on body search, and an error using FTS index fails the search rather
  than reads through all the mails.
- Submission/LMTP: Fixed crash when domain argument is invalid in a
  second EHLO/LHLO command.
- Copying/moving mails using Maildir format loses IMAP keywords in the
  destination if the mail also has no system flags.
- mail_attachment_detection_options=add-flags-on-save caused email body
  to be unnecessarily opened when FETCHing mail headers that were
  already cached.
- mail attachment detection keywords not saved with maildir.
- dovecot.index.cache may have grown excessively large in some
  situations. This happened especially when using autoexpunging with
  lazy_expunge folders. Also with mdbox format in general the cache file
  wasn't recreated as often as it should have.
- Autoexpunged mails weren't immediately deleted from the disk. Instead,
  the deletion from disk happened the next time the folder was opened.
  This could have caused unnecessary delays if the opening was done by
  an interactive IMAP session.
- Dovecot's TCP connections sometimes add extra 40ms latency due to not
  enabling TCP_NODELAY. HTTP and SMTP/LMTP connections weren't
  affected, but everything else was. This delay wasn't always visible -
  only in some situations with some message/packet sizes.
- imapc: Fix various crash conditions
- Dovecot builds were not always reproducible.
- login-proxy: With shutdown_clients=no after config reload the
  existing connections could no longer be listed or kicked with doveadm.
- "doveadm proxy kick" with -f parameter caused a crash in some
  situations.
- Auth policy can cause segmentation fault crash during auth process
  shutdown if all auth requests have not been finished.
- Fix various minor bugs leading into incorrect behaviour in mailbox
  list index handling. These rarely caused noticeable problems.
- LDAP auth: Iteration accesses freed memory, possibly crashing
  auth-worker
- local_name { .. } filter in dovecot.conf does not correctly support
  multiple names and wildcards were matched incorrectly.
- replicator: dsync assert-crashes if it can't connect to remote TCP
  server.
- config: Memory leak in config process when ssl_dh setting wasn't
  set and there was no ssl-parameters.dat file.
  This caused config process to die once in a while
  with "out of memory".

---
Aki Tuomi
Open-Xchange oy

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