- dovecot - dovecot.org

Move mail behavior
by Martin Stigge 27 Nov '14

27 Nov '14

Hi! I've recently migrated my IMAP mail setup from a server running an older Debian Squeeze with dovecot 1.2.15 to a new Debian Jessie system with dovecot 2.2.13. In the old setup, it used to be so that a mail moved from a folder to another one was marked as deleted in the originating folder (in dovecot 1.2.15). In the new setup, the mail just disappears from the originating folder (with dovecot 2.2.13). The mail arrives properly in the target folder, so that's fine. But I actually liked the old behavior. I observe this with Evolution as well as Icedove (Thunderbird) mail clients, which is why I assume that it's actually a change in the IMAP server behavior. Is it supposed to behave like that? Is there a way to configure this? Regards, Martin

2 2

2.2.15: SMTP submission server?
by Ron Leach 27 Nov '14

27 Nov '14

List, we're migrating to 2.2 from a 1.x version. There has been mention from time to time of a dovecot SMTP submission server. Last I saw was Timo suggesting this would be a 2.3 feature, but that there was already a 'basic' capability in 2.2 that, more or less, merely provided a secured/authorised SMTP submission. I haven't found anything about this in the wiki, but the feature is of interest to us. I would like to *not* have our MTA capable of being exploited as a relay (it isn't, at the moment) whereas users are logging into our dovecot from offsite using imaps with passwords. While moving to 2.2, I'd like to try to use a secure SMTP submission *separate* from the MTA so that that software, with whatever vulnerabilities or weaknesses it might have, remained locked down and could not relay, if at all possible. (Imaps with passwords means the login details are not transmitted in cleartext and, so, leak no security to an observer of the communications channel. Doubtless there are other weaknesses somewhere but, at least, when using hotel wifi, for example, there is little chance of revealing login details to a packet sniffer. It won't be perfect, there are probably other vulnerabilities, not least in the underlying OSs at each end, but the connection - which is a serious vulnerability in many places - will be as good as is practical to make it.) So, is there some kind of SMTP submission service for a logged in dovecot user, and how would a client make use of that? Is it possible to setup 2.2.15 for this? And, crucially, would the connections between the client (eg at a hotel in some unreliable location) be encrypted right from the start, not using STARTTLS, as is the case in imaps? And, just to be really demanding, could we configure its use on a non-standard port? regards, Ron

6 11

2.2.15 Panic in mbox_sync_read_next_mail()
by Hans Morten Kind 27 Nov '14

27 Nov '14

It might not be a fault in dovecot, as the user is accessing the folder locally with alpine while also running imap-sessions. However it would have been nice with a more graceful action than panic? The panic is preceeded by Error: Next message unexpectedly corrupted in mbox file PATH Panic: file mbox-sync.c: line 152 (mbox_sync_read_next_mail): assertion failed: (sync_ctx->input->v_offset != mail_ctx->mail.from_offset || sync_ctx->input->eof) At #7 in the enclosed backtrace the actual values are sync_ctx->input->v_offset = 564 mail_ctx->mail.from_offset = 564 sync_ctx->input->eof = 0 Some will recommend convertion to maildir, but with 25 years history, thousands of active users and dozens terrabytes of mboxes, we are not even considering it. hmk GNU gdb 6.8 Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i386-pc-solaris2.10"... Reading symbols from /datapool/local/dovecot-2.2.15/lib/dovecot/libdovecot-storage.so.0...done. Loaded symbols for /local/dovecot-2.2.15/lib/dovecot/libdovecot-storage.so.0 Reading symbols from /datapool/local/dovecot-2.2.15/lib/dovecot/libdovecot.so.0...done. Loaded symbols for /local/dovecot-2.2.15/lib/dovecot/libdovecot.so.0 Reading symbols from /datapool/local/program/lib/libssl.so.1.0.0...done. Loaded symbols for /local/program/lib/libssl.so.1.0.0 Reading symbols from /datapool/local/program/lib/libcrypto.so.1.0.0...done. Loaded symbols for /local/program/lib/libcrypto.so.1.0.0 Reading symbols from /datapool/local/program/lib/libz.so...done. Loaded symbols for /local/program/lib/libz.so Reading symbols from /lib/libm.so.2...done. Loaded symbols for /lib/libm.so.2 Reading symbols from /datapool/local/program/lib/libiconv.so.2...done. Loaded symbols for /local/program/lib/libiconv.so.2 Reading symbols from /lib/librt.so.1...done. Loaded symbols for /lib/librt.so.1 Reading symbols from /lib/libnsl.so.1...done. Loaded symbols for /lib/libnsl.so.1 Reading symbols from /lib/libsocket.so.1...done. Loaded symbols for /lib/libsocket.so.1 Reading symbols from /lib/libsendfile.so.1...done. Loaded symbols for /lib/libsendfile.so.1 Reading symbols from /lib/libc.so.1...done. Loaded symbols for /lib/libc.so.1 Reading symbols from /lib/libdl.so.1...done. Loaded symbols for /lib/libdl.so.1 Reading symbols from /usr/lib/libz.so...done. Loaded symbols for /usr/lib/libz.so Reading symbols from /lib/libaio.so.1...done. Loaded symbols for /lib/libaio.so.1 Reading symbols from /lib/libmd.so.1...done. Loaded symbols for /lib/libmd.so.1 Reading symbols from /lib/ld.so.1...done. Loaded symbols for /lib/ld.so.1 Core was generated by `dovecot/imap imap-postlogin'. Program terminated with signal 6, Aborted. [New process 86892 ] #0 0xfe80c8e5 in _lwp_kill () from /lib/libc.so.1 (gdb) #0 0xfe80c8e5 in _lwp_kill () from /lib/libc.so.1 No symbol table info available. #1 0xfe807765 in thr_kill () from /lib/libc.so.1 No symbol table info available. #2 0xfe7b376f in raise () from /lib/libc.so.1 No symbol table info available. #3 0xfe7929e1 in abort () from /lib/libc.so.1 No symbol table info available. #4 0xfeda1c82 in default_fatal_finish (type=LOG_TYPE_PANIC, status=0) at failures.c:152 backtrace = 0x8093260 "0xfeda2b9f -> 0xfeda1e9b -> 0xfee9f57a -> 0xfeea207c -> 0xfeea37e9 -> 0xfeea4363 -> 0xfeea45cd -> 0xfeea477d -> 0xfeecb356 -> 0x8074b45 -> 0x805eeda -> 0x805f463 -> 0x806aad1 -> 0x8069a41 -> 0x8069d26"... #5 0xfeda2b9f in i_internal_fatal_handler (ctx=0x80474e0, format=0xfef4c588 "file %s: line %d (%s): assertion failed: (%s)", args=0x8047504 "°Æôþ\230") at failures.c:152 status = 0 #6 0xfeda1e9b in i_panic (format=0xfef4c588 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:152 ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0, timestamp_usecs = 0} args = 0x8047504 "°Æôþ\230" #7 0xfee9f57a in mbox_sync_read_next_mail (sync_ctx=0x8047794, mail_ctx=0x804760c) at ../../../../src/lib/array.h:158 __FUNCTION__ = "mbox_sync_read_next_mail" #8 0xfeea207c in mbox_sync_loop (sync_ctx=0x8047794, mail_ctx=0x804760c, partial=false) at ../../../../src/lib/array.h:158 rec = (const struct mail_index_record *) 0x0 uid = 0 messages_count = 66 offset = 564 ret = 1 expunged = false skipped_mails = true uids_broken = false #9 0xfeea37e9 in mbox_sync_do (sync_ctx=0x8047794, flags=0) at ../../../../src/lib/array.h:158 mbox_hdr = (struct mbox_index_header *) 0x80b4a20 mail_ctx = {sync_ctx = 0x8047794, mail = {uid = 0, idx_seq = 0, keywords = {arr = { buffer = 0x0, element_size = 0}, v = 0x0, v_modifiable = 0x0}, flags = 32 ' ', uid_broken = 0, expunged = 0, pseudo = 0, status_broken = 0, xstatus_broken = 0, from_offset = 564, body_size = 0, offset = 564, space = 0}, seq = 2, hdr_offset = 564, body_offset = 564, header_first_change = 4294967295, header_last_change = 0, header = 0x809c758, hdr_md5_sum = "Ô\035\214Ù\217\000²\004é\200\t\230ìøB~", content_length = 18446744073709551615, hdr_pos = {4294967295, 4294967295, 4294967295, 4294967295, 4294967295}, parsed_uid = 0, last_uid_updated_value = 0, last_uid_value_start_pos = 0, have_eoh = 0, need_rewrite = 0, seen_imapbase = 0, updated = 0, recent = 0, dirty = 0, imapbase_rewrite = 0, imapbase_updated = 0} st = (const struct stat *) 0x80c0060 i = 0 ret = 52 partial = 1 #10 0xfeea4363 in mbox_sync_int (mbox=0x80b4868, flags=0, lock_id=0x8047988) at ../../../../src/lib/array.h:158 index_sync_ctx = (struct mail_index_sync_ctx *) 0x80b62e0 sync_view = (struct mail_index_view *) 0x80b6320 trans = (struct mail_index_transaction *) 0x80c5890 sync_ctx = {mbox = 0x80b4868, flags = 0, input = 0x80c0180, file_input = 0x80c0040, write_fd = 12, orig_mtime = 1414582020, orig_atime = 1414582021, orig_size = 3843471, last_stat = { st_dev = 47513605, st_pad1 = {0, 0, 0}, st_ino = 17869, st_mode = 33152, st_nlink = 1, st_uid = 22671, st_gid = 4601, st_rdev = 4294967295, st_pad2 = {0, 0}, st_size = 3843471, st_atim = {tv_sec = 1414582021, tv_nsec = 353242309}, st_mtim = {tv_sec = 1414582020, tv_nsec = 0}, st_ctim = {tv_sec = 1414582021, tv_nsec = 352990278}, st_blksize = 131072, st_blocks = 7693, st_fstype = "zfs", '\0' <repeats 12 times>, st_pad4 = {0, 0, 0, 0, 0, 0, 0, 0}}, index_sync_ctx = 0x80b62e0, sync_view = 0x80b6320, t = 0x80c5890, reset_hdr = { major_version = 0 '\0', minor_version = 0 '\0', base_header_size = 0, header_size = 0, record_size = 0, compat_flags = 0 '\0', unused = "\000\000", indexid = 0, flags = 0, uid_validity = 0, next_uid = 0, messages_count = 0, unused_old_recent_messages_count = 0, seen_messages_count = 0, deleted_messages_count = 0, first_recent_uid = 0, first_unseen_uid_lowwater = 0, first_deleted_uid_lowwater = 0, log_file_seq = 0, log_file_tail_offset = 0, log_file_head_offset = 0, unused_old_sync_size = 0, unused_old_sync_stamp = 0, day_stamp = 0, day_first_uid = {0, 0, 0, 0, 0, 0, 0, 0}}, hdr = 0x80c5b68, header = 0x809c758, from_line = 0x809c6b8, base_uid_validity = 1353318516, base_uid_last = 144140, base_uid_last_offset = 250, mails = {arr = {buffer = 0x809c640, element_size = 52}, v = 0x809c640, v_modifiable = 0x809c640}, sync_changes = 0x80ab998, mail_keyword_pool = 0x80bf220, saved_keywords_pool = 0x80bcbe0, prev_msg_uid = 0, next_uid = 144141, idx_next_uid = 144141, seq = 2, idx_seq = 1, need_space_seq = 0, last_nonrecent_uid = 0, expunged_space = 0, space_diff = 0, dest_first_mail = 0, first_mail_crlf_expunged = 0, keep_recent = 0, readonly = 0, delay_writes = 1, renumber_uids = 0, moved_offsets = 0, ext_modified = 0, index_reset = 0, errors = 0} sync_flags = MAIL_INDEX_SYNC_FLAG_DROP_RECENT ret = 1 changed = 1 delay_writes = true readonly = false __FUNCTION__ = "mbox_sync_int" #11 0xfeea45cd in mbox_sync (mbox=0x80b4868, flags=0) at ../../../../src/lib/array.h:158 lock_id = 47 ret = 134957840 __FUNCTION__ = "mbox_sync" #12 0xfeea477d in mbox_storage_sync_init (box=0x80b4868, flags=0) at ../../../../src/lib/array.h:158 mbox = (struct mbox_mailbox *) 0x80b4868 mbox_sync_flags = 0 ret = 0 #13 0xfeecb356 in mailbox_sync_init (box=0x80b4868, flags=0) at ../../src/lib/array.h:197 _data_stack_cur_id = 4 ctx = (struct mailbox_sync_context *) 0x0 #14 0x08074b45 in imap_sync_init (client=0x80b1850, box=0x80b4868, imap_flags=0, flags=0) at ../../src/lib/array.h:158 ctx = (struct imap_sync_context *) 0x80b61b0 __FUNCTION__ = "imap_sync_init" #15 0x0805eeda in idle_sync_now (box=0x80b4868, ctx=0x80b20e0) at cmd-idle.c:74 __FUNCTION__ = "idle_sync_now" #16 0x0805f463 in cmd_idle (cmd=0x80b2058) at cmd-idle.c:74 client = (struct client *) 0x80b1850 ctx = (struct cmd_idle_context *) 0x80b20e0 #17 0x0806aad1 in command_exec (cmd=0x80b2058) at imap-commands.c:101 hook = (const struct command_hook *) 0x809c078 ret = 8 #18 0x08069a41 in client_command_input (cmd=0x80b2058) at imap-client.c:130 client = (struct client *) 0x80b1850 command = (struct command *) 0x3 __FUNCTION__ = "client_command_input" #19 0x08069d26 in client_command_input (cmd=0x80b2058) at imap-client.c:130 client = (struct client *) 0x80b1850 command = (struct command *) 0x809d3cc __FUNCTION__ = "client_command_input" #20 0x08069e29 in client_handle_next_command (client=0x80b1850, remove_io_r=0x8047b9d) at imap-client.c:130 No locals. #21 0x08069ec6 in client_handle_input (client=0x80b1850) at imap-client.c:130 _data_stack_cur_id = 3 ret = 10 remove_io = false handled_commands = false __FUNCTION__ = "client_handle_input" #22 0x0806a04f in client_input (client=0x80b1850) at imap-client.c:130 cmd = (struct client_command_context *) 0x80aaa44 output = (struct ostream *) 0x80abea8 bytes = 10 __FUNCTION__ = "client_input" #23 0xfedbb235 in io_loop_call_io (io=0x80abf10) at ioloop.c:28 ioloop = (struct ioloop *) 0x809bfc0 t_id = 2 __FUNCTION__ = "io_loop_call_io" #24 0xfedbc994 in io_loop_handler_run_internal (ioloop=0x809bfc0) at ioloop-poll.c:96 ctx = (struct ioloop_handler_context *) 0x809cab0 pollfd = (struct pollfd *) 0x809e148 tv = {tv_sec = 1799, tv_usec = 999001} io = (struct io_file *) 0x80abf10 msecs = 1800000 ret = 0 call = true #25 0xfedbb3ce in io_loop_handler_run (ioloop=0x809bfc0) at ioloop.c:28 No locals. #26 0xfedbb325 in io_loop_run (ioloop=0x809bfc0) at ioloop.c:28 __FUNCTION__ = "io_loop_run" #27 0xfed41dc1 in master_service_run (service=0x809bf08, callback=0x807724a <client_connected>) at master-service.c:75 No locals. #28 0x080775e7 in main (argc=2, argv=0x809bd18) at main.c:72 set_roots = {0x8093080, 0x0} login_set = {auth_socket_path = 0x8093188 " 1\t\b", postlogin_socket_path = 0x80931c0 "", postlogin_timeout_secs = 60, callback = 0x8076fbe <login_client_connected>, failure_callback = 0x80771cd <login_client_failed>, request_auth_token = 1} service_flags = MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN storage_service_flags = MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT username = 0x0 c = -1

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LMTP Saving mail to Junk Folder
by Joy 27 Nov '14

27 Nov '14

Hi, I am facing an issues where LMTP delivering all mails to Junk folder, I have checked no sieve script exist either in .sieve or .svbin format but if i remove the sieve from plugin area in LMTP configuration file mails get delivered in Inbox folder. Kindly help me to figure out this issue.

2 2

Pigeonhole, vacation being sent incorrectly
by Harry Mills 26 Nov '14

26 Nov '14

Hi, I have an issue with a vacation message in a sieve script. I can't see an error in the script itself. Pigeonhole version: 0.4.2-32 Dovecot Version: 2.2.10 The script was created by Ingo (part of the Horde suite), but I think the script is fine. The problem is that when a message is sent to the "everyone" group (and alias for every person in the organisation), vacation messages are being sent back which I believe is an error. The script is: =============================================== # Sieve Filter # Generated by Ingo (http://www.horde.org/apps/ingo/) (11/11/14, 5:20:06 pm GMT) require ["vacation", "regex", "fileinto"]; # Vacation if allof ( not exists "list-help", not exists "list-unsubscribe", not exists "list-subscribe", not exists "list-owner", not exists "list-post", not exists "list-archive", not exists "list-id", not exists "Mailing-List", not header :comparator "i;ascii-casemap" :is "Precedence" ["list", "bulk", "junk"], not header :comparator "i;ascii-casemap" :matches "To" "Multiple recipients of*" ) { if header :regex "Received" "^.*(2014) (\$.*\$ )?..:..:.. (\$.*\$ )?((\\+|\\-)[[:digit:]]{4}|.{1,5})( \$.*\$)?$" { if header :regex "Received" "^.*(Nov) (\$.*\$ )?.... (\$.*\$ )?..:..:.. (\$.*\$ )?((\\+|\\-)[[:digit:]]{4}|.{1,5})( \$.*\$)?$" { if header :regex "Received" "^.*(13|14|15|16|17|18) (\$.*\$ )?... (\$.*\$ )?.... (\$.*\$ )?..:..:.. (\$.*\$ )?((\\+|\\-)[[:digit:]]{4}|.{1,5})( \$.*\$)?$" { vacation :days 7 :addresses "user2" :subject "Out of office" "IMPORTANT MESSAGE^M THE MESSAGE "; } } } } =============================================== The user "User2" sent a vacation message back to the sender "user(a)example.com" in response to this message (headers only): =============================================== Return-path: <User(a)example.com> Envelope-to: everyone(a)example.com Delivery-date: Thu, 13 Nov 2014 16:08:16 +0000 Received: from tunis.Exampledomain.local ([192.168.254.107] helo=Tunis) by mail.example.com with esmtp (Exim 4.72) (envelope-from <User(a)example.com>) id 1XowwM-0007Qw-Cj for everyone(a)example.com; Thu, 13 Nov 2014 16:08:10 +0000 From: "User" <User(a)example.com> To: "Everyone at Example" <everyone(a)example.com> Subject: Electrician Date: Thu, 13 Nov 2014 16:08:10 -0000 Organization: Example Consultancy Message-ID: <02e601cfff5c$051ec350$0f5c49f0$(a)example.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02E7_01CFFF5C.051FD4C0" X-Mailer: Microsoft Outlook 14.0 Thread-Index: Ac//W17ujWbs6KgRRsOZFc7+qT45Tg== Content-Language: en-gb X-Spam-Note: SpamAssassin run bypassed - sent from local address This is a multipart message in MIME format. =============================================== I have checked RFC 5230 section 4.5 which states: "Vacation" MUST NOT respond to a message unless the recipient user's email address is in a "To", "Cc", "Bcc", "Resent-To", "Resent-Cc", or "Resent-Bcc" line of the original message. I cannot see the address for "user2(a)example.com" in any of those fields, or indeed referenced anywhere in the email. Is this a bug, or am I misunderstanding something? Harry -- Harry Mills Tel: 01749 812100 Managing Director Mob: 07815 848818 Opendium Ltd. www.opendium.com

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imap-login segfaults when using post-login
by Nico Rittner 26 Nov '14

26 Nov '14

hello, i get these lines in syslog when using post-login within imap-login: imap-login: Fatal: master: service(imap-login): child 574 killed with signal 11 (core dumps disabled) imap[5523]: segfault at 14 ip b7556276 sp bfc1c940 error 4 in libdovecot.so.0.0.0[b7529000+d4000] these are the relevant sections i added: service imap-login { executable = imap post-login } service post-login { executable = script-login /path/to/exec } i also used /bin/true as /path/to/exec to exclude the used exec itself as the reason. same result. version is 2.2.13 on gentoo-linux. i wonder if this error is gentoo-specific (cflags/etc...) or a bug in dovecot. this behaviour can be reproduced on two other of my gentoo-machines. same configuration worked in previous versions, don't know the exact version number. thanks a lot for your suggestions. i'll also cc to the gentoo-people. nico

2 1

Sieve counterpart of IMAP SPECIAL-USE
by Peter Mogensen 26 Nov '14

26 Nov '14

Hi, It would be useful to allow Sieve scripts to "fileinto" based on SPECIAL-USE flags. But all I've been able to find about it is this: http://www.ietf.org/mail-archive/web/sieve/current/msg05171.html Has there been any progress since? /Peter

1 0

slow incremental indexing of maildirs with squat
by vitalif＠yourcmc.ru 26 Nov '14

26 Nov '14

Hi! I'm using Dovecot 2.1.7 on Debian Wheezy 32-bit (package version is 1:2.1.7-7+deb7u1) with maildirs. My problem is that the incremental indexing of maildirs with squat takes a very long time... I don't know if it reindexes anything, but it seems it iterates though all messages on each search query and reads them. It works fast only on successive queries within several minutes, probably because of the messages being in cache. What do you think, is it a bug? -- With best regards, Vitaliy Filippov

2 1

Shared mailboxes using SQL
by Daniel Miller 26 Nov '14

26 Nov '14

I recently tried to change from the simple file to a SQL dictionary for ACL. While the Wiki instructions seemed fairly clear I was having errors. After some further digging, and a little thinking - I read the errors and tried to infer what was happening. I have some IMAP groups configured for sharing. And I guessed the example dictionary didn't allow for them. Looking at my existing shared-mailboxes.db flat file I saw something that gave me a clue. So I added the following: map { pattern = shared/shared-boxes/group/$to/$from table = user_shares value_field = dummy fields { from_user = $from to_user = $to } } And things started working again! A suggestion that perhaps this be added to the wiki - possibly with a bit more information on the "map" sections. Also - would there be any benefit to setting up a separate SQL table for groups? -- Daniel

1 0

v2.2.14 released
by Timo Sirainen 26 Nov '14

26 Nov '14

http://dovecot.org/releases/2.2/dovecot-2.2.14.tar.gz http://dovecot.org/releases/2.2/dovecot-2.2.14.tar.gz.sig Looks like it took a bit longer to make this release after RC1 than I thought. I'm now in San Jose area for a few months and still jumping between apartments and trying to adjust to the new timezone. 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:<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.

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