v2.3.10
* Disable retpoline migitations by default. These can cause severe
performance regressions, so they should be only enabled when
applicable.
* IMAP MOVE now commits transactions in batches of 1000 mails. This
helps especially with lazy_expunge when moving a lot of mails. It
mainly avoids situations where multiple IMAP sessions are running the
same MOVE command and duplicating the mails in the lazy_expunge folder.
With this change there can still be some duplication, but the MOVE
always progresses forward. Also if the MOVE fails at some point, the
changes up to the last 1000 mails are still committed instead of
rolled back. Note that the COPY command behavior hasn't changed,
because it is required by IMAP standard to be an atomic operation.
* IMAP EXPUNGE and CLOSE now expunges mails in batches of 1000 mails.
This helps especially with lazy_expunge when expunging a lot of mails
(e.g. millions) to make sure that the progress always moves forward
even if the process is killed.
* Autoexpunging now expunges mails in batches of 1000 mails. This helps
especially with lazy_expunge when expunging a lot of mails
(e.g. millions) to make sure that the progress always moves forward
even if the process is killed.
+ Add tool for generating sysreport called dovecot-sysreport.
This generates a bundle of information usually needed for support
requests.
+ Add support for the new IMAP \Important SPECIAL-USE flag (RFC 8457).
+ Add metric { group_by } setting. This allows automatically creating
new metrics based on the fields you want to group statistics by.
NOTE: This feature is considered experimental and syntax is subject
to change in future release.
+ auth: Support SCRAM-SHA-256 authentication mechanism.
+ imap: Support the new IMAP STATUS=SIZE extension.
+ Use TCP_QUICKACK to reduce latency for some TCP connections.
+ quota-status: Made the service more robust against erroneous use with
Postfix ACL policies other than smtpd_recipient_restrictions.
+ Add "revision" field support to imap_id_send setting. Using
"revision *" will send in IMAP ID command response the short commit
hash of the Dovecot git source tree HEAD (same as in dovecot --version).
+ IMAP ENVELOPE includes now all addresses when there are multiple
headers (From, To, Cc, etc.) The standard way of having multiple
addresses is to just list them all in a single header. It's
non-standard to have multiple headers. However, since MTAs allow these
mails to pass through and different software may handle them in
different ways, it's better from security point of view to show all
the addresses.
+ Event filters now support using "field_name=" to match a field that
doesn't exist or has an empty value. For example use "error=" to match
only events that didn't fail.
- acl: INBOX ACLs shouldn't apply for IMAP GETMETADATA/SETMETADATA
commands.
- cassandra: CASS_ERROR_SERVER_WRITE_FAILURE error should also be
treated as "uncertain write failure".
- dict-redis: Using quota_clone configured with dict-redis could have
crashed when Redis responded slowly.
- imap-hibernate: Communication trouble with imap-master leads to
segfault.
- imap-hibernate: Unhibernation retrying wasn't working.
- imap: Fixed auth lookup privilege problem when imap process was reused
and user was being un-hibernated.
- Fix potential crash when copying/moving mails within the same folder.
This happened only when there were a lot of fields in dovecot.index.cache.
- lib-index: Recreating dovecot.index.cache file could have crashed when
merging bitmask fields.
- lib-index: Using public/shared folders with INDEXPVT configured to use
private \Seen flags, trying to search seen/unseen in an empty folder
crashes with segfault.
- lib-mail: Large base64-encoded mails weren't decoded properly.
This could have affected searching/indexing mails and message snippet
generation.
- lib-mail: Message with only quoted text could have caused message
snippet to ignore its 200 character limit and return the entire
message. This was added also to dovecot.index.cache file, which
increased disk space and memory usage unnecessarily.
v2.3.9.2 regression (previous versions cached the quoted snippet as
empty). In a large mail quoted text could have become wrongly added
to the snippet, possibly mixed together with non-quoted text.
- lib-smtp: client could have assert-crashed if STARTTLS handshake
finished earlier than usually.
- lib-ssl-iostream: remove -static flag for lib-ssl-iostream linking to
prevent a compile issue.
- lib-storage: Mailbox synchronization may have assert-crashed in some
rare situations.
- lib-storage: mdbox didn't preserve date.saved with dsync.
- lib: Don't require EAI_{ADDRFAMILY,NODATA}, breaks FreeBSD
- master: Some services could respawn unthrottled if they crash during
startup.
- push-notification: Do not send push_notification_finished event if
nothing was done. This happens when mail transaction is started and
ended with no changes.
- quota-status: Addresses with special characters in the local part caused
problems in the interaction between Postfix and Dovecot. Postfix sent
its own internal representation in the recipient field, while Dovecot
expected a valid RFC5321 mailbox address.
- submission-login: SESSION was not correctly encoded field for the
XCLIENT command. Particularly, a '+' character introduced by the
session ID's Base64 encoding causes problems.
- submission: Fix submission_max_mail_size to work correctly on 32-bit
systems.
- submission: Trusted connections crashed in second connection's EHLO
if submission-login { service_count } is something else than 1 (which
is the default).
- submission: XCLIENT command was never used in the protocol exchange
with the relay MTA when submission_backend_capabilities is configured,
even when the relay MTA was properly configured to accept the XCLIENT
command.
v2.3.9:
* Changed several event field names for consistency and to avoid
conflicts in parent-child event relationships:
* SMTP server command events: Renamed "name" to "cmd_name"
* Events inheriting from a mailbox: Renamed "name" to "mailbox"
* Server connection events have only "remote_ip", "remote_port",
"local_ip" and "local_port".
* Removed duplicate "client_ip", "ip" and "port".
* Mail storage events: Removed "service" field.
Use "service:<name>" category instead.
* HTTP client connection events: Renamed "host" to "dest_host" and
"port" to "dest_port"
* auth: Drop Postfix socketmap support. It hasn't been working
with recent Postfix versions for a while now.
* push-notification-lua: The "subject" field is now decoded to UTF8
instead of kept as MIME-encoded.
+ push-notification-lua: Added new "from_address", "from_display_name",
"to_address" and "to_display_name" fields. The display names are
decoded to UTF8.
+ Added various new fields to existing events.
See http://doc.dovecot.net/admin_manual/list_of_events.html
+ Add lmtp_add_received_header setting. It can be used to prevent LMTP
from adding "Received:" headers.
+ doveadm: Support SSL/STARTTLS for proxied doveadm connections based on
doveadm_ssl setting and proxy ssl/tls settings.
+ Log filters support now "service:<name>", which matches all events for
the given service. It can also be used as a category.
+ lib: Use libunwind to get abort backtraces with function names
where available.
+ lmtp: When the LMTP proxy changes the username (from passdb lookup)
add an appropriate ORCPT parameter.
- lmtp: Add lmtp_client_workarounds setting to implement workarounds for
clients that send MAIL and RCPT commands with additional spaces before
the path and for clients that omit <> brackets around the path.
See example-config/conf.d/20-lmtp.conf.
- lda/lmtp: Invalid MAIL FROM addresses were rejcted too aggressively.
Now mails from addresses with unicode characters are delivered, but
their Return-Path header will be <> instead of the given MAIL FROM
address.
- lmtp: The lmtp_hdr_delivery_address setting is ignored.
- imap: imap_command_finished event's "args" and "human_args" parameters
were always empty.
- mbox: Seeking in zlib and bzip2 compressed input streams didn't work
correctly.
- imap-hibernate: Process crashed when client got destroyed while it was
attempted to be unhibernated, and the unhibernation fails.
- *-login: Proxying may have crashed if SSL handshake to the backend
failed immediately. This was unlikely to happen in normal operation.
- *-login: If TLS handshake to upstream server failed during proxying,
login process could crash due to invalid memory access.
- *-login: v2.3 regression: Using SASL authentication without initial
response may have caused SSL connections to hang. This happened often
at least with PHP's IMAP library.
- *-login: When login processes are flooded with authentication attempts
it starts logging errors about "Authentication server sent unknown id".
This is still expected. However, it also caused the login process to
disconnect from auth server and potentially log some user's password
in the error message.
- dict-sql: SQL prepared statements were not shared between sessions.
This resulted in creating a lot of prepared statements, which was
especially inefficient when using Cassandra backend with a lot of
Cassandra nodes.
- auth: auth_request_finished event didn't have success=yes parameter
set for successful authentications.
- auth: userdb dict - Trying to list users crashed.
- submission: Service could be configured to allow anonymous
authentication mechanism and anonymous user access.
- LAYOUT=index: Corrupted dovecot.list.index caused folder creation to
panic.
- doveadm: HTTP server crashes if request target starts with double "/".
- dsync: Remote dsync started hanging if the initial doveadm
"dsync-server" command was sent in the same TCP packet as the
following dsync handshake. v2.3.8 regression.
- lib: Several "input streams" had a bug that in some rare situations
might cause it to access freed memory. This could lead to crashes or
corruption.
The only currently known effect of this is that using zlib plugin with
external mail attachments (mail_attachment_dir) could cause fetching
the mail to return a few bytes of garbage data at the beginning of the
header. Note that the mail wasn't saved corrupted, but fetching it
caused corrupted mail to be sent to the client.
- lib-storage: If a mail only has quoted content, use the quoted text
for generating message snippet (IMAP PREVIEW) instead of returning
empty snippet.
- lib-storage: When vsize header was rebuilt, newly calculated message
sizes were added to dovecot.index.cache instead of being directly
saved into vsize records in dovecot.index.
- lib: JSON generator was escaping UTF-8 characters unnecessarily.
Update dovecot2 and friends to 2.3.8.
2.3.8 2019-10-08
Changes
+ Added mail_delivery_started and mail_delivery_finished events, see
https://doc.dovecot.org/admin_manual/list_of_events/ for details.
+ dsync-replication: Don't replicate users who have "noreplicate" extra
field in userdb.
+ doveadm service status: Show total number of processes created.
+ When logging to syslog, use instance_name setting's value for the
ident. This commonly is added as a log prefix.
+ Base64 encoding/decoding code was rewritten with additional features.
It shouldn't cause any user visible changes.
- v2.3.7 regression: If a folder only receives new mails without any
other mail access, dovecot.index.log keeps growing forever and
dovecot.index keeps being rewritten for every mail delivery.
- dsync-replication may lose keywords after syncing mails restored from
another replica. This only happened if the mail only had keywords and no
system flags.
- event filters: Non-textual event fields could not be filtered using
wildcards.
- auth: Scope parameter was missing from OAuth password grant request.
- doveadm client-server communication may hang in some situations. It is
also using unnecessarily small TCP/IP packet sizes.
- doveadm who and kick did not flush protocol output correctly.
- imap: SETMETADATA with literal value would delete the metadata value
instead of updating it.
- imap: When client issues FETCH PREVIEW (LAZY=FUZZY) command, the
caching decisions should be updated so that newly saved mails will have
the preview cached.
- With mail_nfs_index=yes and/or mail_nfs_storage=yes setuid/setgid
permission bits in some files may have become dropped with some NFS
servers. Changed NFS flushing to now use chmod() instead of chown().
- quota: warnings did not work if quota root was noenforcing
- acl: Global ACL file ignored the last line if it didn't end with LF.
- doveadm stats dump: With JSON formatter output numbers using the
number type instead of as strings
- lmtp_proxy: Ensure that real_* variables are correctly set when using
lmtp_proxy.
- event exporter: http-post driver had hardcoded timeout and did not
support DNS lookups or TLS connections.
- auth: Fix user iteration to work with userdb passwd with glibc v2.28.
- auth: auth service can crash if auth-policy JSON response is invalid
or returned too fast.
- In some rare situations "ps" output could have shown a lot of "?"
characters after Dovecot process titles.
- When dovecot.index.pvt is empty, an unnecessary error is logged:
Error: .../dovecot.index.pvt reset, view is now inconsistent
- SMTP address encoder duplicated initial double quote character when
the localpart of an address ended in '..'. For example
"user+..@example.com" became ""user+.."@example.com in a
sieve redirect.
Update dovecot2 to 2.3.7.
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".
Update dovecot2 and dovecot-{gssapi,ldap,mysql,pgsql,sqlite} to 2.3.6.
v2.3.6 2019-04-30 Aki Tuomi <aki.tuomi@open-xchange.com>
* CVE-2019-11494: Submission-login crashed with signal 11 due to null
pointer access when authentication was aborted by disconnecting.
* CVE-2019-11499: Submission-login crashed when authentication was
started over TLS secured channel and invalid authentication message
was sent.
* auth: Support password grant with passdb oauth2.
+ Use system default CAs for outbound TLS connections.
+ Simplify array handling with new helper macros.
+ fts_solr: Enable configuring batch_size and soft_commit features.
- lmtp/submission: Fixed various bugs in XCLIENT handling, including a
hang when XCLIENT commands were sent infinitely to the remote server.
- lmtp/submission: Forwarded multi-line replies were erroneously sent
as two replies to the client.
- lib-smtp: client: Message was not guaranteed to contain CRLF
consistently when CHUNKING was used.
- fts_solr: Plugin was no longer compatible with Solr 7.
- Make it possible to disable certificate checking without
setting ssl_client_ca_* settings.
- pop3c: SSL support was broken.
- mysql: Closing connection twice lead to crash on some systems.
- auth: Multiple oauth2 passdbs crashed auth process on deinit.
- HTTP client connection errors infrequently triggered a segmentation
fault when the connection was idle and not used for a particular
client instance.
From the upstream release-note:
NEWS:
+ Lua push notification driver: mail keywords and flags are provided
in MessageNew and MessageAppend events.
+ submission: Implement support for plugins.
+ auth: When auth_policy_log_only=yes, only log what the policy server
response would do without actually doing it.
+ auth: Always log policy server decisions with auth_verbose=yes
- v2.3.[34]: doveadm log errors: Output was missing user/session
- lda: Debug log lines could have shown slightly corrupted
- login proxy: Login processes may have crashed in various ways when
login_proxy_max_disconnect_delay was set.
- imap: Fix crash with Maildir+zlib if client disconnects during APPEND
- lmtp proxy: Fix potential assert-crash
- lmtp/submission: Fix crash when SMTP client transaction times out
- submission: Split large XCLIENT commands to 512 bytes per command,
so Postfix accepts them.
- submission: Fix crash when client sends invalid BURL command
- submission: relay backend: VRFY command: Avoid forwarding 500 and
502 replies back to client.
- lib-http: Fix potential assert-crash when DNS lookup fails
- lib-fts: Fix search query generation when one language ignores a
token (e.g. via stopwords).
2.3.4:
* The default postmaster_address is now "postmaster@<user domain or
server hostname>". If username contains the @domain part, that's
used. If not, then the server's hostname is used.
* "doveadm stats dump" now returns two decimals for the "avg" field.
+ Added push notification driver that uses a Lua script
+ Added new SQL, DNS and connection events.
See https://wiki2.dovecot.org/Events
+ Added "doveadm mailbox cache purge" command.
+ Added events API support for Lua scripts
+ doveadm force-resync -f parameter performs "index fsck" while opening
the index. This may be useful to fix some types of broken index files.
This may become the default behavior in a later version.
- director: Kicking a user crashes if login process is very slow
- pop3_no_flag_updates=no: Don't expunge DELEted and RETRed messages
unless QUIT is sent.
- auth: Fix crypt() segfault with glibc-2.28+
- imap: Running UID FILTER script with errors assert-crashes
- dsync, pop3-migration: POP3 UIDLs weren't added to
dovecot.index.cache while mails were saved.
- dict clients may have been using 100% CPU while waiting for dict
server to finish commands.
- doveadm user: Fixed user listing via HTTP API
- All levels of Cassandra log messages were logged as Dovecot errors.
- http/smtp client may have crashed after SSL handshake
- Lua auth converted strings that looked like numbers into numbers.
2.3.3:
* doveconf hides more secrets now in the default output.
* ssl_dh setting is no longer enforced at startup. If it's not set and
non-ECC DH key exchange happens, error is logged and client is
disconnected.
+ Added log_debug=<filter> setting.
+ Added log_core_filter=<log filter> setting.
+ quota-clone: Write to dict asynchronously
+ --enable-hardening attempts to use retpoline Spectre 2 mitigations
+ lmtp proxy: Support source_ip passdb extra field.
+ doveadm stats dump: Support more fields and output stddev by default.
+ push-notification: Add SSL support for OX backend.
- NUL bytes in mail headers can cause truncated replies when fetched.
- director: Conflicting host up/down state changes may in some rare
situations ended up in a loop of two directors constantly overwriting
each others' changes.
- director: Fix hang/crash when multiple doveadm commands are being
handled concurrently.
- director: Fix assert-crash if doveadm disconnects too early
- virtual plugin: Some searches used 100% CPU for many seconds
- dsync assert-crashed with acl plugin in some situations.
- mail_attachment_detection_options=add-flags-on-save assert-crashed
with some specific Sieve scripts.
- Mail snippet generation crashed with mails containing invalid
Content-Type:multipart header.
- Log prefix ordering was different for some log lines.
- quota: With noenforcing option current quota usage wasn't updated.
- auth: Kerberos authentication against Samba assert-crashed.
- stats clients were unnecessarily chatty with the stats server.
- imapc: Fixed various assert-crashes when reconnecting to server.
- lmtp, submission: Fix potential crash if client disconnects while
handling a command.
- quota: Fixed compiling with glibc-2.26 / support libtirpc.
- fts-solr: Empty search values resulted in 400 Bad Request errors
- fts-solr: default_ns parameter couldn't be used
- submission server crashed if relay server returned over 7 lines in
a reply (e.g. to EHLO)
v2.3.2 still had a few unexpected bugs:
- SSL/TLS servers may have crashed during client disconnection
- lmtp: With lmtp_rcpt_check_quota=yes mail deliveries may have
sometimes assert-crashed.
- v2.3.2: "make check" may have crashed with 32bit systems
v2.3.2 is mainly a bugfix release. It contains all the changes in v2.2.36, as well as a bunch of other fixes (mainly for v2.3-only bugs). Binary packages are already in https://repo.dovecot.org/
* old-stats plugin: Don't temporarily enable PR_SET_DUMPABLE while
opening /proc/self/io. This may still cause security problems if the
process is ptrace()d at the same time. Instead, open it while still
running as root.
+ doveadm: Added mailbox cache decision&remove commands. See
doveadm-mailbox(1) man page for details.
+ doveadm: Added rebuild attachments command for rebuilding
$HasAttachment or $HasNoAttachment flags for matching mails. See
doveadm-rebuild(1) man page for details.
+ cassandra: Use fallback_consistency on more types of errors
+ lmtp proxy: Support outgoing SSL/TLS connections
+ lmtp: Add lmtp_rawlog_dir and lmtp_proxy_rawlog_dir settings.
+ submission: Add support for rawlog_dir
+ submission: Add submission_client_workarounds setting.
+ lua auth: Add password_verify() function and additional fields in
auth request.
- doveadm-server: TCP connections are hanging when there is a lot of
network output. This especially caused hangs in dsync-replication.
- Using multiple type=shared mdbox namespaces crashed
- mail_fsync setting was ignored. It was always set to "optimized".
- lua auth: Fix potential crash at deinit
- SSL/TLS servers may have crashed if client disconnected during
handshake.
- SSL/TLS servers: Don't send extraneous certificates to client when
alt certs are used.
- lda, lmtp: Return-Path header without '<' may have assert-crashed.
- lda, lmtp: Unencoded UTF-8 in email address headers may assert-crash
- lda: -f parameter didn't allow empty/null/domainless address
- lmtp, submission: Message size limit was hardcoded to 40 MB.
Exceeding it caused the connection to get dropped during transfer.
- lmtp: Fix potential crash when delivery fails at DATA stage
- lmtp: login_greeting setting was ignored
- Fix to work with OpenSSL v1.0.2f
- systemd unit restrictions were too strict by default
- Fix potential crashes when a lot of log output was produced
- SMTP client may have assert-crashed when sending mail
- IMAP COMPRESS: Send "end of compression" marker when disconnecting.
- cassandra: Fix consistency=quorum to work
- dsync: Lock file generation failed if home directory didn't exist
- Snippet generation for HTML mails didn't ignore &entities inside
blockquotes, producing strange looking snippets.
- imapc: Fix assert-crash if getting disconnected and after
reconnection all mails in the selected mailbox are gone.
- pop3c: Handle unexpected server disconnections without assert-crash
- fts: Fixes to indexing mails via virtual mailboxes.
- fts: If mails contained NUL characters, the text around it wasn't
indexed.
- Obsolete dovecot.index.cache offsets were sometimes used. Trying to
fetch a field that was just added to cache file may not have always
found it.
Changes:
* Submission server support improvements and bug fixes
- Lots of bug fixes to submission server
* API CHANGE: array_idx_modifiable will no longer allocate space
- Particularly affects how you should check MODULE_CONTEXT result, or use REQUIRE_MODULE_CONTEXT.
+ mail_attachment_detection_options setting controls when
$HasAttachment and $HasNoAttachment keywords are set for mails.
+ imap: Support fetching body snippets using FETCH (SNIPPET) or
(SNIPPET (LAZY=FUZZY))
+ fs-compress: Automatically detect whether input is compressed or not.
Prefix the compression algorithm with "maybe-" to enable the
detection, for example: "compress:maybe-gz:6:..."
+ Added settings to change dovecot.index* files' optimization behavior.
See https://wiki2.dovecot.org/IndexFiles#Settings
+ Auth cache can now utilize auth workers to do password hash
verification by setting auth_cache_verify_password_with_worker=yes.
+ Added charset_alias plugin. See
https://wiki2.dovecot.org/Plugins/CharsetAlias
+ imap_logout_format and pop3_logout_format settings now support all of the generic variables (e.g. %{rip}, %{session}, etc.)
Small patch release to fix the worst bugs in v2.3.0. v2.3.1 is coming in about a month with a lot more changes.
* CVE-2017-15130: TLS SNI config lookups may lead to excessive
memory usage, causing imap-login/pop3-login VSZ limit to be reached
and the process restarted. This happens only if Dovecot config has
local_name { } or local { } configuration blocks and attacker uses
randomly generated SNI servernames.
* CVE-2017-14461: Parsing invalid email addresses may cause a crash or
leak memory contents to attacker. For example, these memory contents
might contain parts of an email from another user if the same imap
process is reused for multiple users. First discovered by Aleksandar
Nikolic of Cisco Talos. Independently also discovered by "flxflndy"
via HackerOne.
* CVE-2017-15132: Aborted SASL authentication leaks memory in login
process.
* Linux: Core dumping is no longer enabled by default via
PR_SET_DUMPABLE, because this may allow attackers to bypass
chroot/group restrictions. Found by cPanel Security Team. Nowadays
core dumps can be safely enabled by using "sysctl -w
fs.suid_dumpable=2". If the old behaviour is wanted, it can still be
enabled by setting:
import_environment=$import_environment PR_SET_DUMPABLE=1
- imap-login with SSL/TLS connections may end up in infinite loop
Some of the larger changes:
* Various setting changes, see https://wiki2.dovecot.org/Upgrading/2.3
* Logging rewrite started: Logging is now based on hierarchical events.
This makes it possible to do various things, like: 1) giving
consistent log prefixes, 2) enabling debug logging with finer
granularity, 3) provide logs in more machine readable formats
(e.g. json). Everything isn't finished yet, especially a lot of the
old logging code still needs to be translated to the new way.
* Statistics rewrite started: Stats are now based on (log) events.
It's possible to gather statistics about any event that is logged.
See http://wiki2.dovecot.org/Statistics for details
* ssl_dh setting replaces the old generated ssl-parameters.dat
* IMAP: When BINARY FETCH finds a broken mails, send [PARSE] error
instead of [UNKNOWNCTE]
* Linux: core dumping via PR_SET_DUMPABLE is no longer enabled by
default due to potential security reasons (found by cPanel Security
Team).
+ Added support for SMTP submission proxy server, which includes
support for BURL and CHUNKING extension.
+ LMTP rewrite. Supports now CHUNKING extension and mixing of
local/proxy recipients.
+ auth: Support libsodium to add support for ARGON2I and ARGON2ID
password schemes.
+ auth: Support BLF-CRYPT password scheme in all platforms
+ auth: Added LUA scripting support for passdb/userdb.
See https://wiki2.dovecot.org/AuthDatabase/Lua
- Input streams are more reliable now when there are errors or when
the maximum buffer size is reached. Previously in some situations
this could have caused Dovecot to try to read already freed memory.
- Output streams weren't previously handling failures when writing a
trailer at the end of the stream. This mainly affected encrypt and
zlib compress ostreams, which could have silently written truncated
files if the last write happened to fail (which shouldn't normally
have ever happened).
- virtual plugin: Fixed panic when fetching mails from virtual
mailboxes with IMAP BINARY extension.
- doveadm-server: Fix potential hangs with SSL connections
- doveadm proxy: Reading commands' output from v2.2.33+ servers could
have caused the output to be corrupted or caused a crash.
- Many other smaller fixes
v2.2.33.1:
- dovecot-lda was logging to stderr instead of to the log file.
v2.2.33:
* doveadm director commands wait for the changes to be visible in the
whole ring before they return. This is especially useful in testing.
* Environments listed in import_environment setting are now set or
preserved when executing standalone commands (e.g. doveadm)
+ doveadm proxy: Support proxying logs. Previously the logs were
visible only in the backend's logs.
+ Added %{if}, see https://wiki2.dovecot.org/Variables#Conditionals
+ Added a new notify_status plugin, which can be used to update dict
with current status of a mailbox when it changes. See
https://wiki2.dovecot.org/Plugins/NotifyStatus
+ Mailbox list index can be disabled for a namespace by appending
":LISTINDEX=" to location setting.
+ dsync/imapc: Added dsync_hashed_headers setting to specify which
headers are used to match emails.
+ pop3-migration: Add pop3_migration_ignore_extra_uidls=yes to ignore
mails that are visible in POP3 but not IMAP. This could happen if
new mails were delivered during the migration run.
+ pop3-migration: Further improvements to help with Zimbra
+ pop3-migration: Cache POP3 UIDLs in imapc's dovecot.index.cache
if indexes are enabled. These are used to optimize incremental syncs.
+ cassandra, dict-sql: Use prepared statements if protocol version>3.
+ auth: Added %{ldap_dn} variable for passdb/userdb ldap
- acl: The "create" (k) permission in global acl-file was sometimes
ignored, allowing users to create mailboxes when they shouldn't have.
- sdbox: Mails were always opened when expunging, unless
mail_attachment_fs was explicitly set to empty.
- lmtp/doveadm proxy: hostip passdb field was ignored, which caused
unnecessary DNS lookups if host field wasn't an IP
- lmtp proxy: Fix crash when receiving unexpected reply in RCPT TO
- quota_clone: Update also when quota is unlimited (broken in v2.2.31)
- mbox, zlib: Fix assert-crash when accessing compressed mbox
- doveadm director kick -f parameter didn't work
- doveadm director flush <host> resulted flushing all hosts, if <host>
wasn't an IP address.
- director: Various fixes to handling backend/director changes at
abnormal times, especially while ring was unsynced. These could have
resulted in crashes, non-optimal behavior or ignoring some of the
changes.
- director: Use less CPU in imap-login processes when moving/kicking
many users.
- lmtp: Session IDs were duplicated/confusing with multiple RCPT TOs
when lmtp_rcpt_check_quota=yes
- doveadm sync -1 fails when local mailboxes exist that do not exist
remotely. This commonly happened when lazy_expunge mailbox was
autocreated when incremental sync expunged mails.
- pop3: rawlog_dir setting didn't work
There are various changes in this release that can be used to significantly reduce disk IO with:
1) NFS storage especially, but I guess also other remote filesystems and even some with local disks
2) When mail storage and INDEX storage are separated
* imapc: Info-level line is logged every time when successfully
connected to the remote server. This includes local/remote IP/port,
which can be useful for matching against external logs.
* config: Log a warning if plugin { key=no } is used explicitly.
v2.3 will support "no" properly in plugin settings, but for now
any value at all for a boolean plugin setting is treated as "yes",
even if it's written as explicit "no". This change will now warn
that it most likely won't work as intended.
+ Various optimizations to avoid accessing files/directories when it's
not necessary. Especially avoid accessing mail root directories when
INDEX directories point to a different filesystem.
+ mail_location can now include ITERINDEX parameter. This tells Dovecot
to perform mailbox listing from the INDEX path instead of from the
mail root path. It's mainly useful when the INDEX storage is on a
faster storage.
+ mail_location can now include VOLATILEDIR=<path> parameter. This
is used for creating lock files and in future potentially other
files that don't need to exist permanently. The path could point to
tmpfs for example. This is especially useful to avoid creating lock
files to NFS or other remote filesystems. For example:
mail_location=sdbox:~/sdbox:VOLATILEDIR=/tmp/volatile/%2.256Nu/%u
+ mail_location's LISTINDEX=<path> can now contain a full path.
This allows storing mailbox list index to a different storage
than the rest of the indexes, for example to tmpfs.
+ mail_location can now include NO-NOSELECT parameter. This
automatically deletes any \NoSelect mailboxes that have no children.
These mailboxes are sometimes confusing to users.
+ mail_location can now include BROKENCHAR=<char> parameter. This can
be useful with imapc to access mailbox names that aren't valid mUTF-7
charset from remote servers.
+ If mailbox_list_index_very_dirty_syncs=yes, the list index is no
longer refreshed against filesystem when listing mailboxes. This
allows the mailbox listing to be done entirely by only reading the
mailbox list index.
+ Added mailbox_list_index_include_inbox setting to control whether
INBOX's STATUS information should be cached in the mailbox list
index. The default is "no", but it may be useful to change it to
"yes", especially if LISTINDEX points to tmpfs.
+ userdb can return chdir=<path>, which override mail_home for the
chdir location. This can be useful to avoid accessing home directory
on login.
+ userdb can return postlogin=<socket> to specify per-user imap/pop3
postlogin socket path.
+ cassandra: Add support for result paging by adding page_size=<n>
parameter to the connect setting.
+ dsync/imapc, pop3-migration plugin: Strip also trailing tabs from
headers when matching mails. This helps with migrations from Zimbra.
+ imap_logout_format supports now %{appended} and %{autoexpunged}
+ virtual plugin: Optimize IDLE to use mailbox list index for finding
out when something has changed.
+ Added apparmor plugin. See https://wiki2.dovecot.org/Plugins/Apparmor
- virtual plugin: A lot of fixes. In many cases it was also working
very inefficiently or even incorrectly.
- imap: NOTIFY parameter parsing was incorrectly "fixed" in v2.2.31.
It was actually (mostly) working in previous versions, but broken
in v2.2.31.
- Modseq tracking didn't always work correctly. This could have caused
imap unhibernation to fail or IMAP QRESYNC/CONDSTORE extensions to
not work perfectly.
- mdbox: "Inconsistency in map index" wasn't fixed automatically
- dict-ldap: %variable values used in the LDAP filter weren't escaped.
- quota=count: quota_warning = -storage=.. was never executed (try 2).
v2.2.31 fixed it for -messages, but not for -storage.
- imapc: >= 32 kB mail bodies were supposed to be cached for subsequent
FETCHes, but weren't.
- quota-status service didn't support recipient_delimiter
- acl: Don't access dovecot-acl-list files with acl_globals_only=yes
- mail_location: If INDEX dir is set, mailbox deletion deletes its
childrens' indexes. For example if "box" is deleted, "box/child"
index directory was deleted as well (but mails were preserved).
- director: v2.2.31 caused rapid reconnection loops to directors
that were down.
* LMTP: Removed "(Dovecot)" from added Received headers. Some
installations want to hide it, and there's not really any good reason
for anyone to have it.
+ Add ssl_alt_cert and ssl_alt_key settings to add support for
having both RSA and ECDSA certificates.
+ dsync/imapc, pop3-migration plugin: Strip trailing whitespace from
headers when matching mails. This helps with migrations from Zimbra.
+ acl: Add acl_globals_only setting to disable looking up
per-mailbox dovecot-acl files.
+ Parse invalid message addresses better. This mainly affects the
generated IMAP ENVELOPE replies.
- v2.2.30 wasn't fixing corrupted dovecot.index.cache files properly.
It could have deleted wrong mail's cache or assert-crashed.
- v2.2.30 mail-crypt-acl plugin was assert-crashing
- v2.2.30 welcome plugin wasn't working
- Various fixes to handling mailbox listing. Especially related to
handling nonexistent autocreated/autosubscribed mailboxes and ACLs.
- Global ACL file was parsed as if it was local ACL file. This caused
some of the ACL rule interactions to not work exactly as intended.
- auth: forward_* fields didn't work properly: Only the first forward
field was working, and only if the first passdb lookup succeeded.
- Using mail_sort_max_read_count sometimes caused "Broken sort-*
indexes, resetting" errors.
- Using mail_sort_max_read_count may have caused very high CPU usage.
- Message address parsing could have crashed on invalid input.
- imapc_features=fetch-headers wasn't always working correctly and
caused the full header to be fetched.
- imapc: Various bugfixes related to connection failure handling.
- quota=imapc sent unnecessary FETCH RFC822.SIZE to server when
expunging mails.
- quota=count: quota_warning = -storage=.. was never executed
- quota=count: Add support for "ns" parameter
- dsync: Fix incremental syncing for mails that don't have Date or
Message-ID headers.
- imap: Fix hang when client sends pipelined SEARCH +
EXPUNGE/CLOSE/LOGOUT.
- oauth2: Token validation didn't accept empty server responses.
- imap: NOTIFY command has been almost completely broken since the
beginning. I guess nobody has been trying to use it.
* auth: Use timing safe comparisons for everything related to
passwords. It's unlikely that these could have been used for
practical attacks, especially because Dovecot delays and flushes all
failed authentications in 2 second intervals. Also it could have
worked only when passwords were stored in plaintext in the passdb.
* master process sends SIGQUIT to all running children at shutdown,
which instructs them to close all the socket listeners immediately.
This way restarting Dovecot should no longer fail due to some
processes keeping the listeners open for a long time.
+ auth: Add passdb { mechanisms=none } to match separate passdb lookup
+ auth: Add passdb { username_filter } to use passdb only if user
matches the filter. See https://wiki2.dovecot.org/PasswordDatabase
+ dsync: Add dsync_commit_msgs_interval setting. It attempts to commit
the transaction after saving this many new messages. Because of the
way dsync works, it may not always be possible if mails are copied
or UIDs need to change.
+ imapc: Support imapc_features=search without ESEARCH extension.
+ imapc: Add imapc_features=fetch-bodystructure to pass through remote
server's FETCH BODY and BODYSTRUCTURE.
+ imapc: Add quota=imapc backend to use GETQUOTA/GETQUOTAROOT on the
remote server.
+ passdb imap: Add allow_invalid_cert and ssl_ca_file parameters.
+ If dovecot.index.cache corruption is detected, reset only the one
corrupted mail instead of the whole file.
+ doveadm mailbox status: Add "firstsaved" field.
+ director_flush_socket: Add old host's up/down and vhost count as parameters
- More fixes to automatically fix corruption in dovecot.list.index
- dsync-server: Fix support for dsync_features=empty-header-workaround
- imapc: Various bugfixes, including infinite loops on some errors
- IMAP NOTIFY wasn't working for non-INBOX if IMAP client hadn't
enabled modseq tracking via CONDSTORE/QRESYNC.
- fts-lucene: Fix it to work again with mbox format
- Some internal error messages may have contained garbage in v2.2.29
- mail-crypt: Re-encrypt when copying/moving mails and per-mailbox keys
are used. Otherwise the copied mails can't be opened.
- vpopmail: Fix compiling
v2.2.29.1 2017-04-12 Timo Sirainen <tss@iki.fi>
- imapc reconnection fix was forgotten from 2.2.29 release, which also
made "make check" fail in a unit test
- dict-sql: Merging multiple UPDATEs to a single statement wasn't
actually working.
- Fixed building with vpopmail
v2.2.29 2017-04-10 Timo Sirainen <tss@iki.fi>
* passdb/userdb dict: Don't double-expand %variables in keys. If dict
was used as the authentication passdb, using specially crafted
%variables in the username could be used to cause DoS (CVE-2017-2669)
* When Dovecot encounters an internal error, it logs the real error and
usually logs another line saying what function failed. Previously the
second log line's error message was a rather uninformative "Internal
error occurred. Refer to server log for more information." Now the
real error message is duplicated in this second log line.
* lmtp: If a delivery has multiple recipients, run autoexpunging only
for the last recipient. This avoids a problem where a long
autoexpunge run causes LMTP client to timeout between the DATA
replies, resulting in duplicate mail deliveries.
* config: Don't stop the process due to idling. Otherwise the
configuration is reloaded when the process restarts.
* mail_log plugin: Differentiate autoexpunges from regular expunges
* imapc: Use LOGOUT to cleanly disconnect from server.
* lib-http: Internal status codes (>9000) are no longer visible in logs
* director: Log vhost count changes and HOST-UP/DOWN
+ quota: Add plugin { quota_max_mail_size } setting to limit the
maximum individual mail size that can be saved.
+ imapc: Add imapc_features=delay-login. If set, connecting to the
remote IMAP server isn't done until it's necessary.
+ imapc: Add imapc_connection_retry_count and
imapc_connection_retry_interval settings.
+ imap, pop3, indexer-worker: Add (deinit) to process title before
autoexpunging runs.
+ Added %{encrypt} and %{decrypt} variables
+ imap/pop3 proxy: Log proxy state in errors as human-readable string.
+ imap/pop3-login: All forward_* extra fields returned by passdb are
sent to the next hop when proxying using ID/XCLIENT commands. On the
receiving side these fields are imported and sent to auth process
where they're accessible via %{passdb:forward_*}. This is done only
if the sending IP address matches login_trusted_networks.
+ imap-login: If imap_id_retain=yes, send the IMAP ID string to
auth process. %{client_id} expands to it in auth process. The ID
string is also sent to the next hop when proxying.
+ passdb imap: Use ssl_client_ca_* settings for CA validation.
- fts-tika: Fixed crash when parsing attachment without
Content-Disposition header. Broken by 2.2.28.
- trash plugin was broken in 2.2.28
- auth: When passdb/userdb lookups were done via auth-workers, too much
data was added to auth cache. This could have resulted in wrong
replies when using multiple passdbs/userdbs.
- auth: passdb { skip & mechanisms } were ignored for the first passdb
- oauth2: Various fixes, including fixes to crashes
- dsync: Large Sieve scripts (or other large metadata) weren't always
synced.
- Index rebuild (e.g. doveadm force-resync) set all mails as \Recent
- imap-hibernate: %{userdb:*} wasn't expanded in mail_log_prefix
- doveadm: Exit codes weren't preserved when proxying commands via
doveadm-server. Almost all errors used exit code 75 (tempfail).
- ACLs weren't applied to not-yet-existing autocreated mailboxes.
- Fixed a potential crash when parsing a broken message header.
- cassandra: Fallback consistency settings weren't working correctly.
- doveadm director status <user>: "Initial config" was always empty
- imapc: Various reconnection fixes.
* director: "doveadm director move" to same host now refreshes user's
timeout. This allows keeping user constantly in the same backend by
just periodically moving the user there.
* When new mailbox is created, use initially INBOX's
dovecot.index.cache caching decisions.
* Expunging mails writes GUID to dovecot.index.log now only if the
GUID is quickly available from index/cache.
* pop3c: Increase timeout for PASS command to 5 minutes.
* Mail access errors are no longer ignored when searching or sorting.
With IMAP the untagged SEARCH/SORT reply is still sent the same as
before, but NO reply is returned instead of OK.
+ Make dovecot.list.index's filename configurable. This is needed when
there are multiple namespaces pointing to the same mail root
(e.g. lazy_expunge namespace for mdbox).
+ Add size.virtual to dovecot.index when folder vsizes are accessed
(e.g. quota=count). This is mainly a workaround to avoid slow quota
recalculation performance when message sizes get lost from
dovecot.index.cache due to corruption or some other reason.
+ auth: Support OAUTHBEARER and XOAUTH2 mechanisms. Also support them
in lib-dsasl for client side.
+ auth: Support filtering by SASL mechanism: passdb { mechanisms }
+ Shrink the mail processes' memory usage by not storing settings
duplicated unnecessarily many times.
+ imap: Add imap_fetch_failure setting to control what happens when
FETCH fails for some mails (see example-config).
+ imap: Include info about last command in disconnection log line.
+ imap: Created new SEARCH=X-MIMEPART extension. It's currently not
advertised by default, since it's not fully implemented.
+ fts-solr: Add support for basic authentication.
+ Cassandra: Support automatically retrying failed queries if
execution_retry_interval and execution_retry_times are set.
+ doveadm: Added "mailbox path" command.
+ mail_log plugin: If plugin { mail_log_cached_only=yes }, log the
wanted fields only if it doesn't require opening the email.
+ mail_vsize_bg_after_count setting added (see example-config).
+ mail_sort_max_read_count setting added (see example-config).
+ pop3c: Added pop3c_features=no-pipelining setting to prevent using
PIPELINING extension even though it's advertised.
- Index files: day_first_uid wasn't updated correctly since v2.2.26.
This caused dovecot.index.cache to be non-optimal.
- imap: SEARCH/SORT may have assert-crashed in
client_check_command_hangs
- imap: FETCH X-MAILBOX may have assert-crashed in virtual mailboxes.
- imap: Running time in tagged command reply was often wrongly 0.
- search: Using NOT n:* or NOT UID n:* wasn't handled correctly
- director: doveadm director kick was broken
- director: Fix crash when using director_flush_socket
- director: Fix some bugs when moving users between backends
- imapc: Various error handling fixes and improvements
- master: doveadm process status output had a lot of duplicates.
- autoexpunge: If mailbox's rename timestamp is newer than mail's
save-timestamp, use it instead. This is useful when autoexpunging
e.g. Trash/* and an entire mailbox is deleted by renaming it under
Trash to prevent it from being autoexpunged too early.
- autoexpunge: Multiple processes may have been trying to expunge the
same mails simultaneously. This was problematic especially with
lazy_expunge plugin.
- auth: %{passdb:*} was empty in auth-worker processes
- auth-policy: hashed_password was always sent empty.
- dict-sql: Merge multiple UPDATEs to a single statement if possible.
- fts-solr: Escape {} chars when sending queries
- fts: fts_autoindex_exclude = \Special-use caused crashes
- doveadm-server: Fix leaks and other problems when process is reused
for multiple requests (service_count != 1)
- sdbox: Fix assert-crash on mailbox create race
- lda/lmtp: deliver_log_format values weren't entirely correct if Sieve
was used. especially %{storage_id} was broken.
- lmtp_user_concurrency_limit didn't work if userdb changed username
* dovecot.list.index.log rotation sizes/times were changed so that
the .log file stays smaller and .log.2 is deleted sooner.
+ Added mail_crypt plugin that allows encryption of stored emails.
See http://wiki2.dovecot.org/Plugins/MailCrypt
+ stats: Global stats can be sent to Carbon server by setting
stats_carbon_server=ip:port
+ imap/pop3 proxy: If passdb returns proxy_not_trusted, don't send
ID/XCLIENT
+ Added generic hash modifier for %variables:
%{<hash algorithm>;rounds=<n>,truncate=<bits>,salt=s>:field}
Hash algorithm is any of the supported ones, e.g. md5, sha1, sha256.
Also "pkcs5" is supported using SHA256. For example: %{sha256:user}
or %{md5;truncate=32:user}.
+ Added support for SHA3-256 and SHA3-512 hashes.
+ config: Support DNS wildcards in local_name, e.g.
local_name *.example.com { .. } matches anything.example.com, but
not multiple.anything.example.com.
+ config: Support multiple names in local_name, e.g.
local_name "1.example.com 2.example.com" { .. }
- Fixed crash in auth process when auth-policy was configured and
authentication was aborted/failed without a username set.
- director: If two users had different tags but the same hash,
the users may have been redirected to the wrong tag's hosts.
- Index files may have been thought incorrectly lost, causing
"Missing middle file seq=.." to be logged and index rebuild.
This happened more easily with IMAP hibernation enabled.
- Various fixes to restoring state correctly in un-hibernation.
- dovecot.index files were commonly 4 bytes per email too large. This
is because 3 bytes per email were being wasted that could have been
used for IMAP keywords.
- Various fixes to handle dovecot.list.index corruption better.
- lib-fts: Fixed assert-crash in address tokenizer with specific input.
- Fixed assert-crash in HTML to text parsing with specific input
(e.g. for FTS indexing or snippet generation)
- doveadm sync -1: Fixed handling mailbox GUID conflicts.
- sdbox, mdbox: Perform full index rebuild if corruption is detected
inside lib-index, which runs index fsck.
- quota: Don't skip quota checks when moving mails between different
quota roots.
- search: Multiple sequence sets or UID sets in search parameters
weren't handled correctly. They were incorrectly merged together.
* master: Removed hardcoded 511 backlog limit for listen(). The kernel
should limit this as needed.
* doveadm import: Source user is now initialized the same as target
user. Added -U parameter to override the source user.
* Mailbox names are no longer limited to 16 hierarchy levels. We'll
check another way to make sure mailbox names can't grow larger than
4096 bytes.
+ Added a concept of "alternative usernames" by returning user_* extra
field(s) in passdb. doveadm proxy list shows these alt usernames in
"doveadm proxy list" output. "doveadm director&proxy kick" adds
-f <passdb field> parameter. The alt usernames don't have to be
unique, so this allows creation of user groups and kicking them in
one command.
+ auth: passdb/userdb dict allows now %variables in key settings.
+ auth: If passdb returns noauthenticate=yes extra field, assume that
it only set extra fields and authentication wasn't actually performed.
+ auth: passdb static now supports password={scheme} prefix.
+ auth, login_log_format_elements: Added %{local_name} variable, which
expands to TLS SNI hostname if given.
+ imapc: Added imapc_max_line_length to limit maximum memory usage.
+ imap, pop3: Added rawlog_dir setting to store IMAP/POP3 traffic logs.
This replaces at least partially the rawlog plugin.
+ dsync: Added dsync_features=empty-header-workaround setting. This
makes incremental dsyncs work better for servers that randomly return
empty headers for mails. When an empty header is seen for an existing
mail, dsync assumes that it matches the local mail.
+ doveadm sync/backup: Added -I <max size> parameter to skip too
large mails.
+ doveadm sync/backup: Fixed -t parameter and added -e for "end date".
+ doveadm mailbox metadata: Added -s parameter to allow accessing
server metadata by using empty mailbox name.
+ Added "doveadm service status" and "doveadm process status" commands.
+ director: Added director_flush_socket. See
http://wiki2.dovecot.org/Director#Flush_socket
+ doveadm director flush: Users are now moved only max 100 at a time to
avoid load spikes. --max-parallel parameter overrides this.
+ Added FILE_LOCK_SLOW_WARNING_MSECS environment, which logs a warning
if any lock is waited on or kept for this many milliseconds.
- master process's listener socket was leaked to all child processes.
This might have allowed untrusted processes to capture and prevent
"doveadm service stop" comands from working.
- login proxy: Fixed crash when outgoing SSL connections were hanging.
- auth: userdb fields weren't passed to auth-workers, so %{userdb:*}
from previous userdbs didn't work there.
- auth: Each userdb lookup from cache reset its TTL.
- auth: Fixed auth_bind=yes + sasl_bind=yes to work together
- auth: Blocking userdb lookups reset extra fields set by previous
userdbs.
- auth: Cache keys didn't include %{passdb:*} and %{userdb:*}
- auth-policy: Fixed crash due to using already-freed memory if policy
lookup takes longer than auth request exists.
- lib-auth: Unescape passdb/userdb extra fields. Mainly affected
returning extra fields with LFs or TABs.
- lmtp_user_concurrency_limit>0 setting was logging unnecessary
anvil errors.
- lmtp_user_concurrency_limit is now checked before quota check with
lmtp_rcpt_check_quota=yes to avoid unnecessary quota work.
- lmtp: %{userdb:*} variables didn't work in mail_log_prefix
- autoexpunge settings for mailboxes with wildcards didn't work when
namespace prefix was non-empty.
- Fixed writing >2GB to iostream-temp files (used by fs-compress,
fs-metawrap, doveadm-http)
- director: Ignore duplicates in director_servers setting.
- director: Many fixes related to connection handshaking, user moving
and error handling.
- director: Don't break with shutdown_clients=no
- zlib, IMAP BINARY: Fixed internal caching when accessing multiple
newly created mails. They all had UID=0 and the next mail could have
wrongly used the previously cached mail.
- doveadm stats reset wasn't reseting all the stats.
- auth_stats=yes: Don't update num_logins, since it doubles them when
using with mail stats.
- quota count: Fixed deadlocks when updating vsize header.
- dict-quota: Fixed crashes happening due to memory corruption.
- dict proxy: Fixed various timeout-related bugs.
- doveadm proxying: Fixed -A and -u wildcard handling.
- doveadm proxying: Fixed hangs and bugs related to printing.
- imap: Fixed wrongly triggering assert-crash in
client_check_command_hangs.
- imap proxy: Don't send ID command pipelined with nopipelining=yes
- imap-hibernate: Don't execute quota_over_script or last_login after
un-hibernation.
- imap-hibernate: Don't un-hibernate if client sends DONE+IDLE in one
IP packet.
- imap-hibernate: Fixed various failures when un-hibernating.
- fts: fts_autoindex=yes was broken in 2.2.25 unless
fts_autoindex_exclude settings existed.
- fts-solr: Fixed searching multiple mailboxes (patch by x16a0)
- doveadm fetch body.snippet wasn't working in 2.2.25. Also fixed a
crash with certain emails.
- pop3-migration + dbox: Various fixes related to POP3 UIDL
optimization in 2.2.25.
- pop3-migration: Fixed "truncated email header" workaround.
v2.2.26 had a couple of nasty bugs left in it, so here's a fixup release. The version number is also a little bit weird, but had to be done this way (although 2.2.26.0.1 could have been another possibility).
- Fixed some compiling issues.
- auth: Fixed assert-crash when using NTLM or SKEY mechanisms and
multiple passdbs.
- auth: Fixed crash when exporting to auth-worker passdb extra fields
that had empty values.
- dsync: Fixed assert-crash in dsync_brain_sync_mailbox_deinit
* lmtp: Start tracking lmtp_user_concurrency_limit and reject already
at RCPT TO stage. This avoids MTA unnecessarily completing DATA only
to get an error.
* doveadm: Previously only mail settings were read from protocol
doveadm { .. } section. Now all settings are.
+ quota: Added quota_over_flag_lazy_check setting. It avoids checking
quota_over_flag always at startup. Instead it's checked only when
quota is being read for some other purpose.
+ auth: Added a new auth policy service:
http://wiki2.dovecot.org/Authentication/Policy
+ auth: Added PBKDF2 password scheme
+ auth: Added %{auth_user}, %{auth_username} and %{auth_domain}
+ auth: Added ":remove" suffix to extra field names to remove them.
+ auth: Added "delay_until=<timestamp>[+<max random secs>]" passdb
extra field. The auth will wait until <timestamp> and optionally some
randomness and then return success.
+ dict proxy: Added idle_msecs=<n> parameter. Support async operations.
+ Performance improvements for handling large mailboxes.
+ Added lib-dcrypt API for providing cryptographic functions.
+ Added "doveadm mailbox update" command
+ imap commands' output now includes timing spent on the "syncing"
stage if it's larger than 0.
+ cassandra: Added metrics=<path> to connect setting to output internal
statistics in JSON format every second to <path>.
+ doveadm mailbox delete: Added -e parameter to delete only empty
mailboxes. Added --unsafe option to quickly delete a mailbox,
bypassing lazy_expunge and quota plugins.
+ doveadm user & auth cache flush are now available via doveadm-server.
+ doveadm service stop <services> will stop specified services while
leaving the rest of Dovecot running.
+ quota optimization: Avoid reading mail sizes for backends which
don't need them (count, fs, dirsize)
+ Added mailbox { autoexpunge_max_mails=<n> } setting.
+ Added welcome plugin: http://wiki2.dovecot.org/Plugins/Welcome
+ fts: Added fts_autoindex_exclude setting.
- v2.2.24's MIME parser was assert-crashing on mails having truncated
MIME headers.
- auth: With multiple userdbs the final success/failure result wasn't
always correct. The last userdb's result was always used.
- doveadm backup was sometimes deleting entire mailboxes unnecessarily.
- doveadm: Command -parameters weren't being sent to doveadm-server.
- If dovecot.index read failed e.g. because mmap() reached VSZ limit,
an empty index could have been opened instead, corrupting the
mailbox state.
- imapc: Fixed EXPUNGE handling when imapc_features didn't have modseq.
- lazy-expunge: Fixed a crash when copying failed. Various other fixes.
- fts-lucene: Fixed crash on index rescan.
- auth_stats=yes produced broken output
- dict-ldap: Various fixes
- dict-sql: NULL values crashed. Now they're treated as "not found".
v2.2.24 2016-04-26 Timo Sirainen <tss@iki.fi>
* doveconf now warns if it sees a global setting being changed when
the same setting was already set inside some filters. (A common
mistake has been adding more plugins to a global mail_plugins
setting after it was already set inside protocol { .. }, which
caused the global setting to be ignored for that protocol.)
* LMTP proxy: Increased default timeout 30s -> 125s. This makes it
less likely to reach the timeout and cause duplicate deliveries.
* LMTP and indexer now append ":suffix" to session IDs to make it
unique for the specific user's delivery. (Fixes duplicate session
ID warnings in stats process.)
+ Added dict-ldap for performing read-only LDAP dict lookups.
+ lazy-expunge: All mails can be saved to a single specified mailbox.
+ mailbox { autoexpunge } supports now wildcards in mailbox names.
+ doveadm HTTP API: Added support for proxy commands
+ imapc: Reconnect when getting disconnected in non-selected state.
+ imapc: Added imapc_features=modseq to access MODSEQs/HIGHESTMODSEQ.
This is especially useful for incremental dsync.
+ doveadm auth/user: Auth lookup performs debug logging if
-o auth_debug=yes is given to doveadm.
+ Added passdb/userdb { auth_verbose=yes|no } setting.
+ Cassandra: Added user, password, num_threads, connect_timeout and
request_timeout settings.
+ doveadm user -e <value>: Print <value> with %variables expanded.
- Huge header lines could have caused Dovecot to use too much memory
(depending on config and used IMAP commands). (Typically this would
result in only the single user's process dying with out of memory
due to reaching service { vsz_limit } - not a global DoS).
- dsync: Detect and handle invalid/stale -s state string better.
- dsync: Fixed crash caused by specific mailbox renames
- auth: Auth cache is now disabled passwd-file. It was unnecessary and
it broke %variables in extra fields.
- fts-tika: Don't crash if it returns 500 error
- dict-redis: Fixed timeout handling
- SEARCH INTHREAD was crashing
- stats: Only a single fifo_listeners was supported, making it
impossible to use both auth_stats=yes and mail stats plugin.
- SSL errors were logged in separate "Stacked error" log lines
instead of as part of the disconnection reason.
- MIME body parser didn't handle properly when a child MIME part's
--boundary had the same prefix as the parent.
This is a bugfix-only release with various important fixes on top of v2.2.22.
- Various fixes to doveadm. Especially running commands via
doveadm-server was broken.
- director: Fixed user weakness getting stuck in some situations
- director: Fixed a situation where directors keep re-sending
different states to each others and never becoming synced.
- director: Fixed assert-crash related to a slow "user killed" reply
- Fixed assert-crash related to istream-concat, which could have
been triggered at least by a Sieve script.
- doveadm mailbox list (and some others) were broken in v2.2.20
- director: Fixed making backend changes when running with only a
single director server.
- virtual plugin: Fixed crash when trying to open nonexistent
autocreated backend mailbox.
* pop3_deleted_flag has been broken since v2.2.10. Using it would
cause buffer overflows, which could be exploitable. However, this
bug would have become visible quite soon after users had deleted
some POP3 mails, because the pop3 processes would have started
crashing all the time even in normal use.
* "doveadm director flush" command has a changed meaning now:
It safely moves users to their wanted backends, instead of simply
forgetting the mapping entirely and leaving the existing connections
untouched. Use -F parameter to get the original unsafe behavior.
+ Added imap-hibernate processes (see imap_hibernate_timeout setting).
IDLEing IMAP connections can be hibernated, which saves memory.
+ Optimized tracking mailboxes' vsizes (= sum of all messages' sizes).
If mailbox_list_index=yes, it's also stored in there. This makes it
very efficient to look up vsizes for all mailboxes.
+ Added a quota "count" backend, which uses the mailbox vsizes to get
the current quota usage. It requires using the new quota_vsizes=yes
setting, which tracks the messages' "virtual sizes" rather than
"physical sizes". Their distiction is minor and mostly irrelevant
nowadays (if mail sizes should be counted with LF or CRLF newlines).
+ "doveadm director up/down" commands added. The monitoring script
should be using these commands instead of changing the vhost count.
This allows admin to manually disable a server by changing the vhost
count to 0 without the monitoring script changing it back.
+ Added support for HAProxy protocol: http://wiki2.dovecot.org/HAProxy
+ Added push-notification plugin framework, which can be used to
easily implement push notifications to various backends. Implemented
"ox" backend for notifying Open-Xchange via HTTP/json.
+ imap_logout_format supports more variables now, e.g. number of
deleted messages.
+ pop3: Added pop3_delete_type setting (related to pop3_deleted_flag).
+ plugin { fts_enforced=yes } setting now fails body searches unless
it can be done via the full text search engine.
+ Added %{passdb:*} and %{userdb:*} variables to various places
+ auth: Added ":protected" suffix for passdb and userdb fields. If
used, the field doesn't overwrite an existing field.
+ IMAP/POP3 proxy: If a backend server dies, avoid client reconnection
spikes by slowly disconnecting clients over time. This is enabled by
setting login_proxy_max_disconnect_delay=secs passdb extra field.
+ imap: Added new read-only METADATA entries: /private/specialuse,
/shared/comment, /shared/admin
+ imap: If client disconnects in the middle of a command, log how long
the command had been running.
- mdbox: Rebuilding could have caused message's reference count to
overflow the 16bit number in some situations, causing problems when
trying to expunge the duplicates.
- Various search fixes (fts, solr, tika, lib-charset, indexer)
- Various virtual plugin fixes
- Various fixes and optimizations to dsync, imapc and pop3-migration
- imap: Various RFC compliancy and crash fixes to NOTIFY
v2.2.18 2015-05-15 Timo Sirainen <tss@iki.fi>
- director: Login UNIX sockets were normally detected as doveadm or
director ring sockets, causing it to break in existing installations.
- sdbox: When copying a mail in alt storage, place the destination to
alt storage as well.
v2.2.17 2015-05-13 Timo Sirainen <tss@iki.fi>
* Dovecot no longer checks or warns if a mountpoint is removed. This
was causing more trouble than it was worth. Make sure that all the
mountpoints that Dovecot accesses aren't writable by mail processes
when they're unmounted.
* dict server wasn't properly escaping/unescaping data. Fixing this
broke backwards compatibility with data that contains line feeds.
This hopefully affects only very few installations. If you're using
dict to save multiline data (Sieve scripts to SQL), you may be
affected.
* imap: SPECIAL-USE capability is no longer advertised if there are
no special_use flags specified for any mailboxes.
+ lmtp: Added lmtp_hdr_delivery_address setting to specify whether
to include email address in Delivered-To: and Received: headers.
+ Added initial version of full text search library, which includes
language-specific text normalization and filtering. This is still
in development, but it's already possible to use for testing with
fts-lucene and fts-solr.
+ lda, lmtp: deliver_log_format can now include %{delivery_time},
which expands to how many milliseconds it took to deliver the mail.
With LMTP %{session_time} also expands to how many milliseconds the
LMTP session took, not including the delivery time.
+ lmtp proxy: Mail delivery logging includes timing information.
+ imap: Most IMAP commands now include in the tagged reply how many
milliseconds it took to run the command (not counting the time spent
on waiting for the IMAP client to read/write data).
+ director: Implemented director_proxy_maybe passdb extra field to
be able to run director and backend in the same Dovecot instance.
(LMTP doesn't support mixed proxy/non-proxy destinations currently.)
+ doveadm: Added -F <file> parameter to read a list of users from the
given file and run the command for all the users. This is similar to
-A parameter reading the list of users from userdb lookup.
+ Implemented initial Cassandra CQL support as lib-sql backend. It's
only usable as dict backend currently.
+ Added quota-clone plugin to copy current quota usage to a dict.
- auth: If auth_master_user_separator was set, auth process could be
crashed by trying to log in with empty master username.
- imap-login, pop3-login: Fixed crash on handshake failures with new
OpenSSL versions (v1.0.2) when SSLv3 was disabled.
- auth: If one passdb fails allow_nets check, it shouldn't have failed
all the other passdb checks later on.
- imap: Server METADATA couldn't be accessed
- imapc: Fixed \Muted label handling in gmail-migration.
- imapc: Various bugfixes and improvements.
- Trash plugin fixes by Alexei Gradinari
- mbox: Fixed crash/corruption in some situations
* dbox: Resyncing (e.g. doveadm force-resync) no longer deletes
dovecot.index.cache file. The cache file was rarely the problem
so this just caused unnecessary slowness.
* Mailbox name limits changed during mailbox creation: Each part of
a hierarchical name (e.g. "x" or "y" in "x/y") can now be up to 255
chars long (instead of 200). This also reduces the max number of
hierarchical levels to 16 (instead of 20) to keep the maximum name
length 4096 (a common PATH_MAX limit). The 255 char limit is
hopefully large enough for migrations from all existing systems.
It's also the limit on many filesystems.
+ director: Added director_consistent_hashing setting to enable
consistent hashing (instead of the mostly-random MD5 hashing).
This causes fewer user moves between backends when backend counts
are changed, which may improve performance (mainly due to caching).
+ director: Added support for "tags", which allows one director ring
to serve multiple backend clusters with different sets of users.
+ LMTP server: Added lmtp_user_concurrency_limit setting to limit how
many LMTP deliveries can be done concurrently for a single user.
+ LMTP server: Added support for STARTTLS command.
+ If logging data is generated faster than it can be written, log a
warning about it and show information about it in log process's
process title in ps output. Also don't allow a single service to
flood too long at the cost of delaying other services' logging.
+ stats: Added support for getting global statistics.
+ stats: Use the same session IDs as the rest of Dovecot.
+ stats: Plugins can now create their own statistics fields
+ doveadm server: Non-mail related commands can now also be used
via doveadm server (TCP socket).
+ doveadm proxying: passdb lookup can now override doveadm_port and
change the username.
+ doveadm: Search query supports now "oldestonly" parameter to stop
immediately on the first non-match. This can be used to optimize:
doveadm expunge mailbox Trash savedbefore 30d oldestonly
+ doveadm: Added "save" command to directly save mails to specified
mailbox (bypassing Sieve).
+ doveadm fetch: Added body.snippet field, which returns the first
100 chars of a message without whitespace or HTML tags. The result
is stored into dovecot.index.cache, so it can be fetched efficiently.
+ dsync: Added -t <timestamp> parameter to sync only mails newer than
the given received-timestamp.
+ dsync: Added -F [-]<flag> parameter to sync only mails with[out] the
given flag/keyword.
+ dsync: Added -a <mailbox> parameter to specify the virtual mailbox
containing user's all mails. If this mailbox is already found to
contain the wanted mail (by its GUID), the message is copied from
there instead of being re-saved. (This isn't efficient enough yet
for incremental replication.)
+ dsync: -m parameter can now specify \Special-use names for mailboxes.
+ imapc: Added imapc_features=gmail-migration to help migrations from
GMail. See http://wiki2.dovecot.org/Migration/Gmail
+ imapc: Added imapc_features=search to support IMAP SEARCH command.
(Currently requires ESEARCH support from remote server.)
+ expire plugin: Added expire_cache=yes setting to cache most of the
database lookups in dovecot index files.
+ quota: If overquota-flag in userdb doesn't match the current quota
usage, execute a configured script.
+ redis dict: Added support for expiring keys (:expire_secs=n) and
specifying the database number (:db=n)
- auth: Don't crash if master user login is attempted without
any configured master=yes passdbs
- Parsing UTF-8 text for mails could have caused broken results
sometimes if buffering was split in the middle of a UTF-8 character.
This affected at least searching messages.
- String sanitization for some logged output wasn't done properly:
UTF-8 text could have been truncated wrongly or the truncation may
not have happened at all.
- fts-lucene: Lookups from virtual mailbox consisting of over 32
physical mailboxes could have caused crashes.
Some small fixes and changes to v2.2.14. This release is mainly in the hope
that it could still make it into the next Debian stable instead of v2.2.14 -
mainly because of a couple of new assert crashes that started happening in
v2.2.14 and should be fixed now.
* Plugins can now print a banner comment in doveconf output
(typically the plugin version)
* Replication plugin now triggers low (instead of high) priority for
mail copying operations.
* IMAP/POP3/ManageSieve proxy: If destination server can't be
connected to, retry connecting once per second up to the value of
proxy_timeout. This allows quick restarts/upgrades on the backend
server without returning login failures.
* Internal passdb lookups (e.g. done by lmtp/doveadm proxy) wasn't
returning failure in some situations where it should have (e.g.
allow_nets mismatch)
* LMTP uses mail_log_prefix now for logging mail deliveries instead of
a hardcoded prefix. The non-delivery log prefix is still hardcoded
though.
+ passdb allow_nets=local matches lookups that don't contain an IP
address (internally done by Dovecot services)
+ Various debug logging and error logging improvements
- Various race condition fixes to LAYOUT=index
- v2.2.14 virtual plugin crashed in some situations
* lmtp: Delivered-To: header no longer contains <> around the email
address. Other MDAs don't have it either.
* "Out of disk space" errors are now treated as temporary errors
(not the same as "Out of disk quota").
* replication plugin: Use replication only for users who have a
non-empty mail_replica setting.
+ lmtp proxy: Log a line about each mail delivery.
+ Added login_source_ips setting. This can be used to set the source IP
address round-robin from a pool of IPs (in case you run out of TCP
ports).
+ Rawlog settings can use tcp:<host>:<port> as the path.
+ virtual plugin: Don't keep more than virtual_max_open_mailboxes
(default 64) number of backend mailboxes open.
+ SSL/TLS compression can be disabled with ssl_options=no_compression
+ acl: Global ACL file now supports "quotes" around patterns.
+ Added last-login plugin to set user's last-login timestamp on login.
+ LDAP auth: Allow passdb credentials lookup also with auth_bind=yes
- IMAP: MODSEQ was sent in FETCH reply even if CONDSTORE/QRESYNC wasn't
enabled. This broke at least old Outlooks.
- passdb static treated missing password field the same as an empty
password field.
- mdbox: Fixed potential infinite looping when scanning a broken
mdbox file.
- imap-login, pop3-login: Fixed potential crashes when client
disconnected unexpectedly.
- imap proxy: The connection was hanging in some usage patterns. This
mainly affected older Outlooks.
- lmtp proxy: The proxy sometimes delivered empty mails in error
situations or potentially delivered truncated mails.
- fts-lucene: If whitespace_chars was set, we may have ended up
indexing some garbage words, growing the index size unnecessarily.
- -c and -i parameters for dovecot/doveadm commands were ignored if
the config socket was readable.
- quota: Quota recalculation didn't include INBOX in some setups.
- Mail headers were sometimes added to dovecot.index.cache in wrong
order. The main problem this caused was with dsync+imapc incremental
syncing when the second sync thought the local mailbox had changed.
- doveadm backup didn't notice if emails were missing from the middle
of the destination mailbox. Now it deletes and resyncs the mailbox.
* Fixed a DoS attack against imap/pop3-login processes. If SSL/TLS
handshake was started but wasn't finished, the login process
attempted to eventually forcibly disconnect the client, but failed
to do it correctly. This could have left the connections hanging
arond for a long time. (Affected Dovecot v1.1+)
+ mdbox: Added mdbox_purge_preserve_alt setting to keep the file
within alt storage during purge. (Should become enforced in v2.3.0?)
+ fts: Added support for parsing attachments via Apache Tika. Enable
with: plugin { fts_tika = http://tikahost:9998/tika/ }
+ virtual plugin: Delay opening backend mailboxes until it's necessary.
This requires mailbox_list_index=yes to work. (Currently IMAP IDLE
command still causes all backend mailboxes to be opened.)
+ mail_never_cache_fields=* means now to disable all caching. This may
be a useful optimization as doveadm/dsync parameter for some admin
tasks which shouldn't really update the cache file.
+ IMAP: Return SPECIAL-USE flags always for LSUB command.
- pop3 server was still crashing in v2.2.12 with some settings
- maildir: Various fixes and improvements to handling compressed mails,
especially when they have broken/missing S=sizes in filenames.
- fts-lucene, fts-solr: Fixed crash on search when the index contained
duplicate entries.
- Many fixes and performance improvements to dsync and replication
- director was somewhat broken when there were exactly two directors
in the ring. It caused errors about "weak users" getting stuck.
- mail_attachment_dir: Attachments with the last base64-encoded line
longer than the rest wasn't handled correctly.
- IMAP: SEARCH/SORT PARTIAL was handled completely wrong in v2.2.11+
- acl: Global ACL file handling was broken when multiple entries
matched the mailbox name. (Only the first entry was used.)
+ acl plugin: Added an alternative global ACL file that can contain
mailbox patterns. See http://wiki2.dovecot.org/ACL for details.
+ imap proxy: Added proxy_nopipelining passdb setting to work around
other IMAP servers' bugs (MS Exchange 2013 especially).
+ Added %{auth_user}, %{auth_username} and %{auth_domain} variables.
See http://wiki2.dovecot.org/Variables for details.
+ Added support for LZ4 compression.
+ stats: Track also wall clock time for commands.
+ pop3_migration plugin improvements to try harder to match the UIDLs
correctly.
- imap: SEARCH/SORT PARTIAL reponses may have been too large.
- doveadm backup: Fixed assert-crash when syncing mailbox deletion.
+ auth: passdb/userdb dict rewrite to support much more complex
setups. See doc/example-config/dovecot-dict-auth.conf.ext.
The old settings will continue to work.
+ auth: Added userdb result_success/failure/tempfail and skip
settings, similar to passdb's. See
http://wiki2.dovecot.org/UserDatabase
+ imap: Implemented SETQUOTA command for admin user when quota_set is
configured. See http://master.wiki2.dovecot.org/Quota/Configuration
+ quota: Support "*" and "?" wildcards in mailbox names in quota_rules
+ mysql: Added ssl_verify_server_cert=no|yes parameter. This currently
defaults to "no" to make sure nothing breaks, but likely will become
"yes" in Dovecot v2.3.
+ ldap: Added blocking=yes setting to use auth worker processes for
ldap lookups. This is a workaround for now to be able to use multiple
simultaneous LDAP connections.
+ pop3c+dsync performance improvements
- quota-status: quota_grace was ignored
- ldap: Fixed memory leak with auth_bind=yes and without
auth_bind_userdn.
- imap: Don't send HIGHESTMODSEQ anymore on SELECT/EXAMINE when
CONDSTORE/QRESYNC has never before been enabled for the mailbox.
- imap: Fixes to handling mailboxes without permanent modseqs.
(When [NOMODSEQ] is returned by SELECT, mainly with in-memory
indexes.)
- imap: Various fixes to METADATA support.
- stats plugin: Processes that only temporarily dropped privileges
(e.g. indexer-worker) may have been logging errors about not being
able to open /proc/self/io.
+ Full text search indexing can now be done automatically after
saving/copying mails by setting plugin { fts_autoindex=yes }
+ replicator: Added replication_dsync_parameters setting to pass
"doveadm sync" parameters (for controlling what to replicate).
+ Added mail-filter plugin
+ Added liblzma/xz support (zlib_save=xz)
- v2.2.8's improved cache file handling exposed several old bugs
related to fetching mail headers.
- v2.2.7's iostream handling changes were causing some connections
to be disconnected before flushing their output (e.g. POP3 logout
message wasn't being sent)
+ Mail cache lookups work for the mail being saved. This improves
performance by avoiding the need to parse the mail multiple times
when using some plugins (e.g. mail_log).
+ Mail cache works for recently cached data also with in-memory
indexes.
+ imapc: Many performance improvements, especially when working with
dsync. Also added imapc_feature=fetch-headers which allows using
FETCH BODY.PEEK[HEADER.FIELDS (..)] to avoid reading the entire
header.
+ mail_location = ..:FULLDIRNAME=dbox-Mails is the same as
:DIRNAME=dbox-Mails, but it will also be used for
:INDEX and :CONTROL directories. (It should have worked this way
from the beginning, but can't be changed anymore without breaking
existing installations).
- Fixed infinite loop in message parsing if message ends with
"--boundary" and CR (without LF). Messages saved via SMTP/LMTP can't
trigger this, because messages must end with an "LF.". A user could
trigger this for him/herself though.
- lmtp: Client was sometimes disconnected before all the output was
sent to it.
- imap_zlib plugin caused crashes during client disconnection in
v2.2.7
- replicator: Database wasn't being exported to disk every 15 minutes
as it should have. Instead it was being imported, causing "doveadm
replicator remove" commands to not work very well.
* Some usage of passdb checkpassword could have been exploitable by
local users. You may need to modify your setup to keep it working.
See http://wiki2.dovecot.org/AuthDatabase/CheckPassword#Security
+ auth: Added ability to truncate values logged by
auth_verbose_passwords (see 10-logging.conf comment)
+ mdbox: Added "mdbox_deleted" storage, which can be used to access
messages with refcount=0. For example: doveadm import
mdbox_deleted:~/mdbox "" mailbox inbox subject oops
+ ssl-params: Added ssl_dh_parameters_length setting.
- master process was doing a hostname.domain lookup for each created
process, which may have caused a lot of unnecessary DNS lookups.
- dsync: Syncing over 100 messages at once caused problems in some
situations, causing messages to get new UIDs.
- fts-solr: Different Solr hosts for different users didn't work.
* acl: If public/shared namespace has a shared subscriptions file for
all users, don't list subscription entries that are not visible to
the user accessing it.
+ doveadm: Added "auth lookup" command for doing passdb lookup.
+ login_log_format_elements: Added %{orig_user}, %{orig_username}
and %{orig_domain} expanding to the username exactly as sent by
the client (before any changes auth process made).
+ Added ssl_prefer_server_ciphers setting.
+ auth_verbose_passwords: Log the password also for unknown users.
+ Linux: Added optional support for SO_REUSEPORT with
inet_listener { reuse_port=yes }
- director: v2.2.5 changes caused "SYNC lost" errors
- dsync: Many fixes and error handling improvements
- doveadm -A: Don't waste CPU by doing a separate config lookup
for each user
- Long-running ssl-params process no longer prevents Dovecot restart
- mbox: Fixed mailbox_list_index=yes to work correctly
+ SSL: Added support for ECDH/ECDHE cipher suites
+ Added some missing man pages
+ quota-status: Added quota_status_toolarge setting
- director: Users near expiration could have been redirected to
different servers at the same time.
- pop3: Avoid assert-crash if client disconnects during LIST.
- mdbox: Corrupted index header still wasn't automatically fixed.
- dsync: Various fixes to work better with imapc and pop3c storages.
- ldap: sasl_bind=yes caused crashes, because Dovecot's lib-sasl
symbols conflicted with Cyrus SASL library.
- imap: Various error handling fixes to CATENATE. (Found using
Apple's stress test script.)
+ doveadm: Added "flags" command to modify message flags.
+ doveadm: Added "deduplicate" command to expunge message duplicates.
+ dsync: Show the state in process title with verbose_proctitle=yes.
- imap/pop3 proxy: Master user logins were broken in v2.2.3
- sdbox/mdbox: A corrupted index header with wrong size was never
automatically fixed in v2.2.3.
- mbox: Fixed assert-crashes related to locking
+ zlib: Keep the last mail cached uncompressed in a temp file. This
fixes performance when doing small partial fetches from a large
mail.
+ acl: If plugin { acl_defaults_from_inbox = yes } is set, get the
default ACLs for private and shared namespaces from the user's INBOX.
(This probably will become default in v2.3.)
+ pop3: Added pop3_deleted_flag setting to switch POP3 deletions to
only hide the messages from POP3, but still be visible via IMAP.
- ACL plugin: Mailbox creation wasn't actually checking any ACLs
and always succeeded (due to some v2.2 API changes). The created
mailbox couldn't have been accessed though, so this couldn't have
caused any data leak.
- IMAP: Various URLAUTH fixes.
- IMAP: Fixed a hang with invalid APPEND parameters.
- IMAP LIST-EXTENDED: INBOX was never listed with \Subscribed flag.
- mailbox_list_index=yes still caused crashes.
- maildir: Fixed a crash after dovecot-keywords file was re-read.
- maildir: If files had reappeared unexpectedly to a Maildir, they
were ignored until index files were deleted.
- Maildir: Fixed handling over 26 keywords in a mailbox.
- Maildir++: Fixed mail_shared_explicit_inbox=no
- namespace { prefix="" list=no } was listing mailboxes.
- imap/pop3-login proxying: Fixed a crash if TCP connection succeeded,
but the remote login timed out.
- Case-insensitive search/sort didn't work correctly for all unicode
characters, as specified by i;unicode-casemap comparator. If full
text search indexes were used, they need to be rebuilt for old mails
to be handled correctly. (This bug has existed always in Dovecot.)
Changes since 2.1.13, from the NEWS file
v2.2.0 2013-04-11 Timo Sirainen <tss@iki.fi>
* When creating home directories, the permissions are copied from the
parent directory if it has setgid-bit set. For full details, see
http://wiki2.dovecot.org/SharedMailboxes/Permissions
* "doveadm auth" command was renamed to "doveadm auth test"
* IMAP: ID command now advertises server name as Dovecot by default.
It was already trivial to guess this from command replies.
* dovecot.index.cache files can be safely accessed only by v2.1.11+.
Older versions may think they're corrupted and delete them.
* LDA/LMTP: If saving a mail brings user from under quota to over
quota, allow it based on quota_grace setting (default: 10%
above quota limit).
* pop3_lock_session=yes now uses a POP3-only dovecot-pop3-session.lock
file instead of actually locking the mailbox (and causing
IMAP/LDA/LMTP to wait for the POP3 session to close).
* mail_shared_explicit_inbox setting's default switched to "no".
* ssl_client_ca_dir setting replaced imapc_ssl_ca_dir and
pop3c_ssl_ca_dir settings.
+ Implemented IMAP MOVE and BINARY extensions
+ Implemented IMAP CATENATE, URLAUTH and URLAUTH=BINARY extensions
(by Stephan Bosch).
+ Implemented IMAP NOTIFY extension. Requires mailbox_list_index=yes
to be enabled.
+ Redesigned and rewritten dsync. The new design makes the syncing
faster, more reliable and more featureful. The new dsync protocol
isn't backwards compatible with old dsync versions (but is designed
to be forwards compatible with future versions).
+ All mailbox formats now support per-user message flags for shared
mailboxes by using a private index. It can be enabled by adding
:INDEXPVT=<path> to mail location. This should be used instead of
:INDEX also for Maildir/mbox to improve performance.
+ Improved mailbox list indexes. They should be usable now, although
still disabled by default.
+ Added LAYOUT=index. The mailbox directories are created using their
GUIDs in the filesystem, while the actual GUID <-> name mapping
exists only in the index.
+ LMTP proxy: Implemented XCLIENT extension for passing remote IP
address through proxy.
v2.2.rc7 2013-04-10 Timo Sirainen <tss@iki.fi>
* checkpasword: AUTH_PASSWORD environment is no longer set.
* Running dsync no longer triggers quota warnings.
+ dsync: Commit large transactions every 100 new messages, so if a
large sync crashes it doesn't have to be restarted from the
beginning.
- replicator: doveadm commands and user list export may have skipped
some users.
- Various fixes to mailbox_list_index=yes
v2.2.rc6 2013-04-08 Timo Sirainen <tss@iki.fi>
* replicator: Don't create replicator-doveadm socket by default.
This way doveadm replicator commands don't accidentally start an
unconfigured replicator server.
+ replicator: Have remote dsync notify the remote replicator that
a user was just synced. This way the replicators are kept roughly
in sync.
+ Added ssl_client_ca_file to specify the CA certs as a file. This is
needed (instead of ssl_client_ca_dir) in RedHat-based systems.
+ Added "doveadm fs" commands, mainly to debug lib-fs backends.
- Mailbox list indexes weren't using proper file permissions based
on the root directory.
v2.2.rc5 2013-04-05 Timo Sirainen <tss@iki.fi>
- A few small random fixes
v2.2.rc4 2013-04-05 Timo Sirainen <tss@iki.fi>
+ Added "doveadm replicator" commands
- Larger changes to lib-http and lib-ssl-iostream error handling.
The API caller can now get the exact error message as a string.
- Various bugfixes to LDAP changes in rc3
v2.2.rc3 2013-03-20 Timo Sirainen <tss@iki.fi>
+ dsync: Support syncing ACLs (and Sieve scripts with Pigeonhole)
+ ldap: Support subqueries and value pointers, see
http://wiki2.dovecot.org/AuthDatabase/LDAP/Userdb
+ postmaster_address setting: Expand %d to recipient's domain
- Fixed a crash when decoding quoted-printable content.
- dsync: Various bugfixes
v2.2.rc2 2013-02-15 Timo Sirainen <tss@iki.fi>
- rc1 wasn't actually usable in most configurations.
v2.2.rc1 2013-02-15 Timo Sirainen <tss@iki.fi>
* See v2.2.0 notes
adam
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hauke
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