Dovecot Changelog

New in version 2.2.18

May 15th, 2015
  • 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.

New in version 2.2.17 (May 13th, 2015)

  • 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 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

New in version 2.2.16 (March 13th, 2015)

  • 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 parameter to sync only mails newer than the given received-timestamp.
  • dsync: Added -F [-] parameter to sync only mails with[out] the given flag/keyword.
  • dsync: Added -a 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
  • 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.

New in version 2.2.15 (October 25th, 2014)

  • 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

New in version 2.2.14 (October 15th, 2014)

  • Some of the more important fixes since RC1:
  • Fixed several race conditions with dovecot.index.cache handling that may have caused unnecessary "cache is corrupted" errors.
  • auth: If auth client listed userdb and disconnected before finishing, the auth worker process got stuck (and eventually all workers could get used up and requests would start failing).
  • Some of the larger changes since v2.2.13:
  • 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:: 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_compressionacl: 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.

New in version 2.2.11 (February 12th, 2014)

  • acl plugin: Added an alternative global ACL file that can contain mailbox patterns. See 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 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.

New in version 2.2.10 (December 20th, 2013)

  • 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
  • imap: Implemented SETQUOTA command for admin user when quota_set is configured. See
  • 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.

New in version 2.2.9 (November 26th, 2013)

  • 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)

New in version 2.2.8 (November 20th, 2013)

  • Some usage of passdb checkpassword could have been exploitable by local users. You may need to modify your setup to keep it working. See

New in version 2.2.7 (November 4th, 2013)

  • Some usage of passdb checkpassword could have been exploitable by local users. You may need to modify your setup to keep it working. See
  • 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.

New in version 2.2.6 (September 26th, 2013)

  • 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

New in version 2.2.5 (August 6th, 2013)

  • SSL: Added support for ECDH/ECDHE cipher suites (by David Hicks)
  • Added some missing man pages (by Pascal Volk)
  • quota-status: Added quota_status_toolarge setting (by Ulrich Zehl)
  • 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.)

New in version 2.2.3 (June 17th, 2013)

  • LDA/LMTP: If new mail delivery first fails with "temporary failure", tempfail the whole delivery instead of falling back to delivering the mail to INBOX. (Requires new Pigeonhole as well.) * doc/solr-schema.xml was updated to Solr v4.x format. Also the default analyzers were changed, hopefully for the better. Note that the schema can't be changed for existing Solr indexes without rebuilding everything. * Solr plugin does only soft commits from now on. You'll need a cronjob to send a hard commit command to it every few minutes.
  • Added %N modifier for variables as %H-like "new hash"
  • sdbox, mdbox: Support POP3 message order field (for migrations)
  • Added mailbox { driver } to specify a different mail storage format for the mailbox than generally used within the namespace.
  • Added initial lib-sasl library for client side SASL support. Currently supports only PLAIN, LOGIN and plugins. Used currently by IMAP and POP3 proxying when authenticating to the remote server.
  • IMAP: If subject contained only whitespace, Dovecot returned an ENVELOPE reply with a huge literal value, effectively causing the IMAP client to wait for more data forever.
  • IMAP: Various URLAUTH fixes.
  • imapc: Various bugfixes and improvements
  • pop3c: Various fixes to make it work in dsync (without imapc)
  • dsync: Fixes to syncing subscriptions. Fixes to syncing mailbox renames.

New in version 2.2.2 (May 20th, 2013)

  • 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.)

New in version 2.1.15 (February 9th, 2013)

  • v2.1.14's dovecot.index.cache fixes caused Dovecot to use more disk I/O and memory than was necessary.

New in version 2.1.14 (January 31st, 2013)

  • doveadm acl recalc command added
  • v2.1.11+ had a race condition where it sometimes overwrote data in dovecot.index.cache file. This could have caused Dovecot to return the same cached data to two different messages.
  • mdbox: Fixes to handling duplicate GUIDs during index rebuild

New in version 2.2 Beta 1 (January 7th, 2013)

  • When creating home directories, the permissions are copied from the parent directory if it has setgid-bit set. For full details, see
  • "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.
  • 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= 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.

New in version 2.1.13 (January 7th, 2013)

  • Some fixes to cache file changes in v2.1.11.
  • fts-solr: Overlong UTF8 sequences in mails were rejected by Solr and caused the mails to not be indexed.
  • virtual storage: Sorting mailbox by from/to/cc/bcc didn't work.

New in version 2.1.12 (December 3rd, 2012)

  • The dovecot-config file installed by v2.1.11 was missing quotes, which broke building
  • Pigeonhole. v2.1.12 release fixes that.

New in version 2.1.11 (November 29th, 2012)

  • lmtp/lda: dovecot.index.cache file is no longer fully mapped to memory, allowing mail deliveries to work even if the file is huge.
  • auth: userdb passwd lookups are now done by auth worker processes instead of auth master process (as it was documented, but accidentally didn't work that way).
  • lmtp: lmtp_rcpt_check_quota=yes setting checks quota on RCPT TO.
  • lmtp: After successful proxying RCPT TO, the next one to a nonexistent user gave tempfail error instead of "user not found".
  • lmtp proxy: Fixed hanging if remote server was down.
  • imap: Fixed crash when SEARCH contained multiple KEYWORD parameters.
  • doveadm: Various fixes to handling doveadm-server connections.
  • -i parameter for Dovecot tools didn't work correctly.
  • director was somewhat broken in v2.1.10. This version also includes various reliability enhancements.
  • auth: passdb imap was broken in v2.1.10.

New in version 2.1.10 (September 26th, 2012)

  • imap: Implemented THREAD=ORDEREDSUBJECT extension.
  • Added "doveadm exec" command to easily execute commands from libexec_dir, e.g. "doveadm exec imap -u user at domain"
  • Added "doveadm copy" command.
  • doveadm copy/move: Added optional user parameter to specify the source username. This allows easily copying mails between different users.
  • Added namespace { disabled } setting to quickly enable/disable namespaces. This is especially useful when its value is returned by userdb.
  • Added mailbox_alias plugin. It allows creating mailbox aliases using symlinks.
  • imapc storage: Added imapc_max_idle_time setting to force activity on connection.
  • fts-solr: Expunging multiple messages is now faster.
  • director: In some conditions director may have disconnected from another director (without logging about it), thinking it was sending invalid data.
  • imap: Various fixes to listing mailboxes.
  • pop3-migration plugin: Avoid disconnection from POP3 server due to idling.
  • login processes crashed if there were a lot of local {} or remote {} settings blocks.

New in version 2.1.4 (April 10th, 2012)

  • Added mail_temp_scan_interval setting and changed its default value from 8 hours to 1 week.
  • Added pop3-migration plugin for easily doing a transparent IMAP+POP3 migration to Dovecot:
  • doveadm user: Added -m parameter to show some of the mail settings.
  • Proxying SSL connections crashed in v2.1.[23]
  • fts-solr: Indexing mail bodies was broken.
  • director: Several changes to significantly improve error handling
  • doveadm import didn't import messages' flags
  • mail_full_filesystem_access=yes was broken
  • Make sure IMAP clients can't create directories when accessing nonexistent users' mailboxes via shared namespace.
  • Dovecot auth clients authenticating via TCP socket could have failed with bogus "PID already in use" errors.

New in version 2.1.0 (February 18th, 2012)

  • Plugins now use UTF-8 mailbox names rather than mUTF-7: acl, autocreate, expire, trash, virtual
  • auth_username_format default changed to %Lu. If you really want case sensitive usernames, set it back to empty.
  • Solr full text search backend changed to use mailbox GUIDs instead of mailbox names, requiring reindexing everything. solr_old backend can be used with old indexes to avoid reindexing, but it doesn't support some newer features.
  • Expire plugin: Only go through users listed by userdb iteration. Delete dict rows for nonexistent users, unless expire_keep_nonexistent_users=yes.
  • Temporary authentication failures sent to IMAP/POP3 clients now includes the server's hostname and timestamp. This makes it easier to find the error message from logs.
  • dsync was merged into doveadm. There is still "dsync" symlink pointing to "doveadm", which you can use the old way for now. The preferred ways to run dsync are "doveadm sync" (for old "dsync mirror") and "doveadm backup". + imapc (= IMAP client) storage allows using a remote IMAP server to be used as storage. This allows using Dovecot as a smart (caching) proxy or using dsync to do migration from remote IMAP server. + Mailbox indexing via queuing indexer service (required for Lucene) + Lucene full text search (FTS) backend rewritten with support for different languages + FTS finally supports "OR" search operation + FTS supports indexing attachments via external programs + IMAP FUZZY extension, supported by Lucene and Solr FTS backends + IMAP SPECIAL-USE extension to describe mailboxes + Mailbox list indexes + Statistics tracking via stats service. Exported via doveadm stats. + Autocreate plugin creates/subscribes mailboxes physically only when the mailbox is opened for the first time. Mailbox listing shows the autocreated mailboxes even if they don't physically exist. + Password and user databases now support default_fields and override_fields settings to specify template defaults/overrides. + SCRAM-SHA-1 authentication mechanism by Florian Zeitz + LDAP: Allow building passdb/userdb extra fields from multiple LDAP attributes by using %{ldap:attributeName} variables in the template. + Improved multi-instance support: Track automatically which instances are started up and manage the list with doveadm instance commands. All Dovecot commands now support -i parameter to select the instance (instead of having to use -c ). See instance_name setting. + auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups. - listescape plugin works perfectly now

New in version 2.0.8 (December 4th, 2010)

  • Services' default vsz_limits weren't being enforced correctly in earlier v2.0 releases. Now that they are enforced, you might notice that the default limits are too low and you need to increase them. This problem will show up in logs as "out of memory" errors. See default_vsz_limit and service { vsz_limit } settings.
  • LMTP: In earlier versions if mail was delivered to user+detail at domain
  • address, LMTP server always attempted to deliver the mail to mailbox named "detail". This was rather unintentional and shouldn't have been the default. lmtp_save_to_detail_mailbox=yes setting now preserves this behavior (default is no).
  • Added systemd support (configure --with-systemdsystemunitdir). Based on patch by Christophe Fergeau.
  • Replaced broken mbox-snarf plugin with a new more generic snarf plugin.
  • dbox: Fixes to handling external mail attachments
  • verbose_proctitle=yes didn't work for all processes in v2.0.7
  • imap, pop3: When service { client_count } was larger than 1, the log messages didn't use the correct prefix. Last logged in user's prefix was always used, regardless of what user's session actually logged it. Now the proper log prefix is always used.
  • MySQL: Only the first specified host was ever used

New in version 2.0.1 (August 25th, 2010)

  • When dsync is started as root, remote dsync command is now also executed as root instead of with dropped privileges.
  • IMAP: QRESYNC parameters for SELECT weren't handled correctly.
  • UTF-8 string validity checking wasn't done correctly (e.g. mailbox names in Sieve fileinto)
  • dsync: Fixed a random assert-crash with remote dsyncing

New in version 1.2.13 (July 24th, 2010)

  • Fixed iconv() crash when it was processing several kilobytes of broken continuous input. This mainly could have caused a problem with IMAP SEARCH. Possibly also with some Sieve checks.
  • If MIME encoded-words contained line feeds, Dovecot logged cache corruption errors.
  • mbox: Renaming mailbox under newly created dir didn't move index directory.
  • mbox: When generating envelope to From_-line, don't append a second @owndomain if username already has one.

New in version 2.0 Beta 4 (March 24th, 2010)

  • Global ACLs are now looked up using namespace prefixes. For example if you previously had INBOX. namespace prefix and a global ACL for"INBOX.Sent", it's now looked up from "INBOX.Sent" file instead of "Sent" as before.
  • Maildir: File permissions are no longer based on dovecot-shared file, but the mailbox directory.
  • Redesigned master process. It's now more modular and there is less code running as root.
  • Configuration supports now per-local/remote ip/network settings.
  • dsync utility does a two-way mailbox synchronization.
  • LMTP server and proxying.
  • Added mdbox (multi-dbox) mail storage backend.
  • doveadm utility can be used to do all kinds of administration functions. Old dovecotpw and *view utilities now exist in its subcommands.
  • imap and pop3 processes can now handle multiple connections.
  • IMAP: COMPRESS=DEFLATE is supported by imap_zlib plugin

New in version 1.2.6 (October 6th, 2009)

  • Upgraded to Unicode 5.2.0
  • Added authtest utility for doing passdb and userdb lookups.
  • login: ssl_security string now also shows the used compression.
  • quota: Don't crash with non-Maildir++ quota backend.
  • imap proxy: Fixed crashing with some specific password characters.
  • dovecot --exec-mail was broken.
  • Avoid assert-crashing when two processes try to create index at the same time.

New in version 1.2.5 (September 14th, 2009)

  • Authentication: DIGEST-MD5 and RPA mechanisms no longer require user's login realm to be listed in auth_realms. It only made configuration more difficult without really providing extra security.
  • zlib plugin: Don't allow clients to save compressed data directly. This prevents users from exploiting (most of the) potential security holes in zlib/bzlib.
  • Added pop3_save_uidl setting.
  • dict quota: When updating quota and user isn't already in dict, recalculate and save the quota.
  • file_set_size() was broken with OSes that didn't support posix_fallocate() (almost everyone except Linux), causing all kinds of index file errors.
  • v1.2.4 index file handling could have caused an assert-crash
  • IMAP: Fixes to QRESYNC extension.
  • virtual plugin: Crashfix
  • deliver: Don't send rejects to any messages that have Auto-Submitted header. This avoids emails loops.
  • Maildir: Performance fixes, especially with maildir_very_dirty_syncs.
  • Maildir++ quota: Limits weren't read early enough from maildirsize file (when quota limits not enforced by Dovecot)
  • Message decoding fixes (mainly for IMAP SEARCH, Sieve).

New in version 1.1.15 (May 18th, 2009)

  • IMAP: When multiple commands are pipelined, try harder to combine their mailbox syncing together. For example with Maildir pipelining
  • STORE 1:* +FLAGS Deleted and EXPUNGE commands the files won't be unnecessarily rename()d before being unlink()ed.
  • IMAP: SEARCH command was slower than necessary in a large mailbox.
  • deliver: When forwarding messages, if -f parameter was given, it should have been used as the Return-Path.
  • Maildir saving: Fixed race condition bugs in uidlist handling, causing files to be given new UIDs sometimes.
  • mbox: Don't crash when expunging all messages and file doesn't end with [CR]LF.
  • expire-tool: Use mail_uid and mail_gid settings if userdb doesn't return uid/gid.
  • Berkeley DB dict: Transaction rollbacking was implemented wrong.
  • zlib plugin: Some email / FETCH command combinations could have disconnected the client or sent compressed garbage.