[Dovecot-news] v2.3.16 released

Timo Sirainen timo at sirainen.com
Fri Aug 6 14:42:32 EEST 2021


One interesting thing in this release is the support for configuring OAUTH2 openid-configuration element. It would be nice if IMAP clients started supporting this feature to enable OAUTH2 for all IMAP servers, not just Gmail and a few others. This would allow all kinds of new authentication methods for IMAP and improve the authentication security in general.


Binary packages in https://repo.dovecot.org/
Docker images in https://hub.docker.com/r/dovecot/dovecot <https://hub.docker.com/r/dovecot/dovecot>

 * Any unexpected exit() will now result in a core dump. This can
   especially help notice problems when a Lua script causes exit(0).
 * auth-worker process is now restarted when the number of auth
   requests reaches service auth-worker { service_count }. The default
   is still unlimited.

 + Event improvements: Added data_stack_grow event and http-client
   category. See https://doc.dovecot.org/admin_manual/list_of_events/
 + oauth2: Support RFC 7628 openid-configuration element. This allows
   clients to support OAUTH2 for any server, not just a few hardcoded
   servers like they do now. See openid_configuration_url setting in
 + mysql: Single statements are no longer enclosed with BEGIN/COMMIT.
 + dovecot-sysreport --core supports multiple core files now and does
   not require specifying the binary path.
 + imapc: When imap_acl plugin is loaded and imapc_features=acl is used,
   IMAP ACL commands are proxied to the remote server. See
 + dict-sql now supports the "UPSERT" syntax for SQLite and PostgreSQL.
 + imap: If IMAP client disconnects during a COPY command, the copying
   is aborted, and changes are reverted. This may help to avoid many
   email duplicates if client disconnects during COPY and retries it
   after reconnecting.
 - master process was using 100% CPU if service attempted to create more
   processes due to process_min_avail, but process_limit was already
   reached. v2.3.15 regression.
 - Using attachment detection flags wrongly logged unnecessary "Failed
   to add attachment keywords" errors. v2.3.13 regression.
 - IMAP QRESYNC: Expunging UID 1 mail resulted in broken VANISHED
   response, which could have confused IMAP clients. v2.3.13 regression.
 - imap: STORE didn't send untagged replies for \Seen changes for
   (shared) mailboxes using INDEXPVT. v2.3.10 regression.
 - rawlog_dir setting would not log input that was pipelined after
   authentication command.
 - Fixed potential infinite looping with autoexpunging.
 - Log event exporter: Truncate long fields to 1000 bytes
 - LAYOUT=index: ACL inheritance didn't work when creating mailboxes
 - Event filters: Unquoted '?' wildcard caused a crash at startup
 - fs-metawrap: Fix to handling zero sized files
 - imap-hibernate: Fixed potential crash at deinit.
 - acl: dovecot-acl-list files were written for acl_ignore_namespaces
 - program-client (used by Sieve extprograms, director_flush_socket)
   may have missed status response from UNIX and network sockets,
   resulting in unexpected failures.

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