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Dovecot Changelog:
+ Added mail_user_session_finished event, which is emitted when the mail
user session is finished (e.g. imap, pop3, lmtp). It also includes
fields with some process statistics information.
See https://doc.dovecot.org/admin_manual/list_of_events/ for more
information.
+ Added process_shutdown_filter setting. When an event matches the filter,
the process will be shutdown after the current connection(s) have
finished. This is intended to reduce memory usage of long-running imap
processes that keep a lot of memory allocated instead of freeing it to
the OS.
+ auth: Add cache hit indicator to auth passdb/userdb finished events.
See https://doc.dovecot.org/admin_manual/list_of_events/ for more
information.
+ doveadm deduplicate: Performance is improved significantly.
+ imapc: COPY commands were sent one mail at a time to the remote IMAP
server. Now the copying is buffered, so multiple mails can be copied
with a single COPY command.
+ lib-lua: Add a Lua interface to Dovecot's HTTP client library. See
https://doc.dovecot.org/admin_manual/lua/ for more information.
- auth: Cache lookup would use incorrect cache key after username change.
- auth: Improve handling unexpected LDAP connection errors/hangs.
Try to fix up these cases by reconnecting to the LDAP server and
aborting LDAP requests earlier.
- auth: Process crashed if userdb iteration was attempted while auth-workers
were already full handling auth requests.
- auth: db-oauth2: Using %{oauth2:name} variables caused unnecessary
introspection requests.
- dict: Timeouts may have been leaked at deinit.
- director: Ring may have become unstable if a backend's tag was changed.
It could also have caused director process to crash.
- doveadm kick: Numeric parameter was treated as IP address.
- doveadm: Proxying can panic when flushing print output. Fixes
Panic: file ioloop.c: line 865 (io_loop_destroy): assertion failed:
(ioloop == current_ioloop).
- doveadm sync: BROKENCHAR was wrongly changed to '_' character when
migrating mailboxes. This was set by default to %, so any mailbox
names containing % characters were modified to "_25".
- imapc: Copying or moving mails with doveadm to an imapc mailbox could
have produced "Error: Syncing mailbox '[...]' failed" Errors. The
operation itself succeeded but attempting to sync the destination
mailbox failed.
- imapc: Prevent index log synchronization errors when two or more imapc
sessions are adding messages to the same mailbox index files, i.e.
INDEX=MEMORY is not used.
- indexer: Process was slowly leaking memory for each indexing request.
- lib-fts: fts header filters caused binary content to be sent to the
indexer with non-default configuration.
- doveadm-server: Process could hang in some situations when printing
output to TCP client, e.g. when printing doveadm sync state.
- lib-index: dovecot.index.log files were often read and parsed entirely,
rather than only the parts that were actually necessary. This mainly
increased CPU usage.
- lmtp-proxy: Session ID forwarding would cause same session IDs being
used when delivering same mail to multiple backends.
- log: Log prefix update may have been lost if log process was busy.
This could have caused log prefixes to be empty or in some cases
reused between sessions, i.e. log lines could have been logged for the
wrong user/session.
- mail_crypt: Plugin crashes if it's loaded only for some users. Fixes
Panic: Module context mail_crypt_user_module missing.
- mail_crypt: When LMTP was delivering mails to both recipients with mail
encryption enabled and not enabled, the non-encrypted recipients may
have gotten mails encrypted anyway. This happened when the first
recipient was encrypted (mail_crypt_save_version=2) and the 2nd
recipient was not encrypted (mail_crypt_save_version=0).
- pop3: Session would crash if empty line was sent.
- stats: HTTP server leaked memory.
- submission-login: Long credentials, such as OAUTH2 tokens, were refused
during SASL interactive due to submission server applying line length
limits.
- submission-login: When proxying to remote host, authentication was not
using interactive SASL when logging in using long credentials such as
OAUTH2 tokens. This caused authentication to fail due to line length
constraints in SMTP protocol.
- submission: Terminating the client connection with QUIT command after
mail transaction is started with MAIL command and before it is
finished with DATA/BDAT can cause a segfault crash.
- virtual: doveadm search queries with mailbox-guid as the only parameter
crashes: Panic: file virtual-search.c: line 77 (virtual_search_get_records):
assertion failed: (result != 0)
Pigeonhole Changelog:
This release is done to maintain parity with dovecot 2.3.19 release, so
it does not contain any news-worthy changes.
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