January 2019 - dovecot

Dovecot 2.3.4 crash
by azurit＠pobox.sk 13 Mar '19

13 Mar '19

Hi, is this a know problem? Newest Dovecot 2.3.4 package from repo.dovecot.org , Debian Stretch (fully upgraded). Nov 29 14:25:11 server00 dovecot: lmtp(16854): Panic: file ostream-dot.c: line 208 (o_stream_dot_sendv): assertion failed: ((size_t)ret == sent + added) Nov 29 14:25:11 server00 dovecot: lmtp(16854): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xd25e1) [0x7fa5f7b655e1] -> /usr/lib/dovecot/libdovecot.so.0(+0xd2681) [0x7 fa5f7b65681] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fa5f7acd093] -> /usr/lib/dovecot/libdovecot.so.0(+0xbb97b) [0x7fa5f7b4e97b] -> /usr/lib/dovecot/libdovecot.so.0(+0x fa4ae) [0x7fa5f7b8d4ae] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_sendv+0x2e) [0x7fa5f7b8da3e] -> /usr/lib/dovecot/libdovecot.so.0(io_stream_copy+0x52) [0x7fa5f7b8e512] -> /usr /lib/dovecot/libdovecot.so.0(o_stream_send_istream+0x58) [0x7fa5f7b8e008] -> /usr/lib/dovecot/libdovecot.so.0(smtp_client_command_send_more+0x1b1) [0x7fa5f7ad7351] -> /usr/lib/dov ecot/libdovecot.so.0(+0x4a096) [0x7fa5f7add096] -> /usr/lib/dovecot/libdovecot.so.0(+0xfd0c3) [0x7fa5f7b900c3] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x75) [0x7fa5f7b 7e5d5] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x109) [0x7fa5f7b7ffd9] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x56) [0x7fa5f7b7e6e6] -> / usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7fa5f7b7e8f8] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fa5f7af2d43] -> dovecot/lmtp [local DATA](main+ 0x240) [0x565287c30f70] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7fa5f77142e1] -> dovecot/lmtp [local DATA](_start+0x2a) [0x565287c310ca] Nov 29 14:25:11 server00 dovecot: lmtp(16854): Fatal: master: service(lmtp): child 16854 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) azur

3 5

Crash in director for secure lmtp proxy connections
by Marcus Fenner 13 Mar '19

13 Mar '19

Hi, After updating some of our director servers from 2.2.36 to 2.3.3 (dcead646b) we experience crashes in about 1/5000 mails in lmtp delivery: Nov 13 12:23:36 Fatal: lmtp(113620): master: service(lmtp): child 113620 killed with signal 6 (core dumped) Nov 13 12:23:36 Panic: lmtp(113623): file ostream-dot.c: line 208 (o_stream_dot_sendv): assertion failed: ((size_t)ret == sent + added) Nov 13 12:23:36 Error: lmtp(113623): Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xe34fb) [0x7f31d89134fb] -> /usr/lib64/dovecot/libdovecot.so.0(+0xe3597) [0x7f31d8913597] -> /usr/lib64/dovecot/libdovecot.so.0(+0x51207) [0x7f31d8881207] -> /usr/lib64/dovecot/libdovecot.so.0(+0x4eeef) [0x7f31d887eeef] -> /usr/lib64/dovecot/libdovecot.so.0(+0x107cf8) [0x7f31d8937cf8] -> /usr/lib64/dovecot/libdovecot.so.0(o_stream_sendv+0x32) [0x7f31d89382c2] -> /usr/lib64/dovecot/libdovecot.so.0(io_stream_copy+0x5a) [0x7f31d8938b6a] -> /usr/lib64/dovecot/libdovecot.so.0(o_stream_send_istream+0x53) [0x7f31d8938873] -> /usr/lib64/dovecot/libdovecot.so.0(smtp_client_command_send_more+0x145) [0x7f31d8890805] -> /usr/lib64/dovecot/libdovecot.so.0(+0x660dd) [0x7f31d88960dd] -> /usr/lib64/dovecot/libssl_iostream_openssl.so(+0xa7e1) [0x7f31d864a7e1] -> /usr/lib64/dovecot/libdovecot.so.0(+0x10a558) [0x7f31d893a558] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x73) [0x7f31d892a203] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7f31d892b8b6] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x50) [0x7f31d892a2b0] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x48) [0x7f31d892a418] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x17) [0x7f31d88a95a7] -> dovecot/lmtp(main+0x245) [0x555b8b59cea5] -> /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f31d867c413] -> dovecot/lmtp(_start+0x2e) [0x555b8b59cfbe] Nov 13 12:23:36 Fatal: lmtp(113623): master: service(lmtp): child 113623 killed with signal 6 (core dumped) On the backend servers the only message is lmtp(9571): Disconnect from 192.168.1.56: Connection closed (in DATA) This happens for every server with this version every time postfix tries to resend the mail. After removing "starttls=y" from the static passdb entry, the mail is sent successfully. Starting with version 2.3.2 the lmtp proxy uses starttls as well, therefore the error seems to be there. I've not been able to figure out, if this has to do with the content of the mails, because they are from many different sources. Thanks! Marcus

3 2

lmtp 2.3.2.1 segfault with backtrace
by Tom Sommer 13 Mar '19

13 Mar '19

lmtp on Director crash with 2.3.2.1 # gdb /usr/libexec/dovecot/lmtp /var/core/60174 GNU gdb (GDB) Red Hat Enterprise Linux (7.2-92.el6) Copyright (C) 2010 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 "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/libexec/dovecot/lmtp...Reading symbols from /usr/lib/debug/usr/libexec/dovecot/lmtp.debug...done. done. [New Thread 60174] Reading symbols from /usr/lib64/dovecot/libdovecot-lda.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot-lda.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot-lda.so.0 Reading symbols from /usr/lib64/dovecot/libdovecot-storage.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot-storage.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot-storage.so.0 Reading symbols from /usr/lib64/dovecot/libdovecot.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot.so.0 Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libc.so.6 Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/librt.so.1 Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libdl.so.2 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] Loaded symbols for /lib64/libpthread.so.0 Reading symbols from /usr/lib64/dovecot/libssl_iostream_openssl.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libssl_iostream_openssl.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libssl_iostream_openssl.so Reading symbols from /usr/lib64/libssl.so.10...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libssl.so.10 Reading symbols from /usr/lib64/libcrypto.so.10...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libcrypto.so.10 Reading symbols from /lib64/libgssapi_krb5.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libgssapi_krb5.so.2 Reading symbols from /lib64/libkrb5.so.3...(no debugging symbols found)...done. Loaded symbols for /lib64/libkrb5.so.3 Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libcom_err.so.2 Reading symbols from /lib64/libk5crypto.so.3...(no debugging symbols found)...done. Loaded symbols for /lib64/libk5crypto.so.3 Reading symbols from /lib64/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libz.so.1 Reading symbols from /lib64/libkrb5support.so.0...(no debugging symbols found)...done. Loaded symbols for /lib64/libkrb5support.so.0 Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libkeyutils.so.1 Reading symbols from /lib64/libresolv.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libresolv.so.2 Reading symbols from /lib64/libselinux.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libselinux.so.1 Core was generated by `dovecot/lmtp'. Program terminated with signal 11, Segmentation fault. #0 smtp_client_command_set_replies (cmd=0x0, replies=1) at smtp-client-command.c:401 401 i_assert(cmd->replies_expected == 1 || Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.212.el6.x86_64 keyutils-libs-1.4-5.el6.x86_64 krb5-libs-1.10.3-65.el6.x86_64 libcom_err-1.41.12-24.el6.x86_64 libselinux-2.0.94-7.el6.x86_64 openssl-1.0.1e-57.el6.x86_64 zlib-1.2.3-29.el6.x86_64 (gdb) bt full #0 smtp_client_command_set_replies (cmd=0x0, replies=1) at smtp-client-command.c:401 __func__ = "smtp_client_command_set_replies" #1 0x00007f5d14f40f3f in smtp_client_transaction_data_cb (reply=0x7ffe5cd19650, trans=0x7f5d176ae2b8) at smtp-client-transaction.c:658 conn = 0x7f5d176ade80 rcpt = 0x7f5d176ae560 i = <value optimized out> count = 1 #2 0x00007f5d14f3e941 in smtp_client_command_fail_reply (_cmd=<value optimized out>, reply=0x7ffe5cd19650) at smtp-client-command.c:299 cmd = 0x7f5d17600d18 tmp_cmd = <value optimized out> conn = 0x7f5d176ade80 state = <value optimized out> callback = 0x7f5d14f40e80 <smtp_client_transaction_data_cb> #3 0x00007f5d14f4113f in smtp_client_transaction_fail_reply (trans=0x7f5d176ae2b8, reply=0x7ffe5cd19650) at smtp-client-transaction.c:365 conn = 0x7f5d176ade80 rcpts = <value optimized out> i = <value optimized out> count = <value optimized out> __func__ = "smtp_client_transaction_fail_reply" #4 0x00007f5d14f41442 in smtp_client_transaction_timeout (trans=0x7f5d176ae2b8) at smtp-client-transaction.c:419 reply = {status = 451, enhanced_code = {x = 4, y = 4, z = 0}, text_lines = 0x7f5d1759c090} #5 0x00007f5d14fdbe7b in io_loop_handle_timeouts_real (ioloop=0x7f5d175a4c80) at ioloop.c:641 timeout = 0x7f5d176299d0 tv = {tv_sec = 0, tv_usec = 0} tv_call = {tv_sec = 1534202969, tv_usec = 770866} t_id = 3 item = 0x7f5d176299d0 #6 io_loop_handle_timeouts (ioloop=0x7f5d175a4c80) at ioloop.c:655 _data_stack_cur_id = 2 #7 0x00007f5d14fdd667 in io_loop_handler_run_internal (ioloop=0x7f5d175a4c80) at ioloop-epoll.c:195 ctx = 0x7f5d175af300 events = <value optimized out> event = <value optimized out> list = <value optimized out> io = <value optimized out> tv = {tv_sec = 34, tv_usec = 105308} events_count = <value optimized out> msecs = <value optimized out> ret = 0 i = <value optimized out> call = <value optimized out> __func__ = "io_loop_handler_run_internal" #8 0x00007f5d14fdb7c5 in io_loop_handler_run (ioloop=0x7f5d175a4c80) at ioloop.c:726 __func__ = "io_loop_handler_run" #9 0x00007f5d14fdb9e8 in io_loop_run (ioloop=0x7f5d175a4c80) at ioloop.c:699 __func__ = "io_loop_run" #10 0x00007f5d14f58963 in master_service_run (service=0x7f5d175a4b10, callback=<value optimized out>) at master-service.c:767 No locals. #11 0x00007f5d159eb584 in main (argc=1, argv=0x7f5d175a48a0) at main.c:158 set_roots = {0x7f5d15262e20, 0x7f5d157c2040, 0x7f5d15bf1540, 0x0} service_flags = <value optimized out> storage_service_flags = <value optimized out> tmp_base_dir = 0x7f5d1759c040 "erver not answering (transaction timed out while waiting for reply to DATA)" c = <value optimized out> error = <value optimized out> -- Tom

3 3

2.3.3: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed
by Tom Sommer 13 Mar '19

13 Mar '19

I see this in my logs after 2.3.3: using zlib plugin, ofc. Oct 02 10:01:39 imap(user(a)example.com)<50643></2k4Sjp3vMqC496W>: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0 || zstream->ostream.error_handling_disabled) Oct 02 10:01:39 imap(user(a)example.com)<50643></2k4Sjp3vMqC496W>: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xce56a) [0x7f442487556a] -> /usr/lib64/dovecot/libdovecot.so.0(+0xce5b1) [0x7f44248755b1] -> /usr/lib64/dovecot/libdovecot.so.0(+0x3d941) [0x7f44247e4941] -> /usr/lib64/dovecot/lib20_zlib_plugin.so(+0x5cdf) [0x7f44233c4cdf] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf4b46) [0x7f442489bb46] -> /usr/lib64/dovecot/libdovecot.so.0(o_stream_destroy+0x13) [0x7f442489be83] -> /usr/lib64/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x173) [0x7f4424b93973] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x36) [0x7f4424b68696] -> dovecot/imap [user(a)example.com X.X.X.X APPEND](+0xede9) [0x55a9d7e86de9] -> dovecot/imap [user(a)example.com X.X.X.X APPEND](command_exec+0x65) [0x55a9d7e956e5] -> dovecot/imap [user(a)example.com X.X.X.X APPEND](+0xf9e6) [0x55a9d7e879e6] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x55) [0x7f442488c275] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbf) [0x7f442488e13f] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x55) [0x7f442488c365] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f442488c588] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f4424808053] -> dovecot/imap [user(a)example.com X.X.X.X APPEND](main+0x32d) [0x55a9d7ea20dd] -> /lib64/libc.so.6(__libc_start_main+0x100) [0x7f4424431d20] -> dovecot/imap [user(a)example.com X.X.X.X APPEND](+0xe419) [0x55a9d7e86419] No clue how to reproduce -- Tom

3 2

imap-hibernate returned failure: Failed to parse client input: Invalid peer_dev_minor value
by Alex 18 Feb '19

18 Feb '19

Hello! I tried to use imap-hibernate. But errors in maillog: Oct 19 05:14:24 server dovecot: imap(email(a)example.com)<67125><Lu7ndYt4n8aASO/q>: Error: kevent(-1) for notify remove failed: Bad file descriptor Oct 19 05:14:24 server dovecot: imap(email(a)example.com)<67125><Lu7ndYt4n8aASO/q>: Error: close(-1) for notify remove failed: Bad file descriptor Oct 19 05:14:24 server dovecot: imap-hibernate: Error: Failed to parse client input: Invalid peer_dev_minor value: 18446744073709486335 Oct 19 05:14:24 server dovecot: imap(email(a)example.com)<67125><Lu7ndYt4n8aASO/q>: Error: /var/run/dovecot/imap-hibernate returned failure: Failed to parse client input: Invalid peer_dev_minor value: 18446744073709486335 Oct 19 05:14:24 server dovecot: imap: Error: dovecot-2.3.3, FreeBSD 10.4 dovenull 38990 0,0 0,0 43748 16308 - S 3:54 0:00,08 imap-login: (imap-login) dovenull 38998 0,0 0,1 47844 19536 - S 3:54 0:00,18 imap-login: [34.193.82.152 TLS proxy] (imap-login) dovenull 38999 0,0 0,1 47844 17180 - S 3:54 0:00,19 imap-login: (imap-login) dovenull 39000 0,0 0,0 35556 9584 - S 3:54 0:00,03 dovecot/imap-login dovenull 39001 0,0 0,0 43748 16320 - S 3:54 0:00,12 imap-login: (imap-login) dovenull 39002 0,0 0,0 43748 16320 - S 3:54 0:00,13 imap-login: (imap-login) dovenull 39003 0,0 0,0 43748 16328 - S 3:54 0:00,16 imap-login: (imap-login) dovenull 39004 0,0 0,1 47844 17948 - S 3:54 0:00,17 imap-login: [12.34.56.78 TLS proxy] (imap-login) vmail 39042 0,0 0,0 15936 3040 - I 3:54 0:00,01 imap-hibernate: [0 connections] (imap-hibernate) vmail 39076 0,0 0,0 78900 8984 - S 3:54 0:00,05 imap: [email(a)example.com 12.34.56.78 IDLE] (imap) vmail 44114 0,0 0,0 78900 8936 - I 4:06 0:00,05 imap: [email(a)example.com 34.193.82.152 IDLE] (imap) srw-rw---- 1 root dovecot 0 19 окт 03:54 imap-hibernate srw------- 1 root dovecot 0 19 окт 03:54 imap-master srw------- 1 root wheel 0 19 окт 03:54 imap-postlogin srw-rw-rw- 1 root wheel 0 19 окт 03:54 imap-urlauth srw------- 1 dovecot wheel 0 19 окт 03:54 imap-urlauth-worker imap_hibernate_timeout = 5 secs service imap-hibernate { extra_groups = $default_internal_group unix_listener imap-hibernate { group = dovecot } user = vmail } service imap { extra_groups = $default_internal_group unix_listener imap-master { group = $default_internal_group } } I tried to set user/group vmail, set mode = 0666, but the same errors. Can you help me with hibernate confiration ? Best regards, Alex

3 8

expunge not removing attachments?
by Ralf Hildebrandt 12 Feb '19

12 Feb '19

I have a large mail backup folder backup(a)backup.invalid; I'm cleaning up daily like this: infimum=`date -d "-4 day" +"%Y-%m-%d"` doveadm expunge -u backup(a)backup.invalid mailbox INBOX SAVEDBEFORE $infimum doveadm purge -u backup(a)backup.invalid yet I see this: # find attachments/ -type f -ctime +5 | wc -l 7522 # find attachments/ -type f | wc -l 127579 # find attachments/ -type f -mtime +5 | wc -l 14361 # find attachments/ -type f | wc -l 127793 About 5.9% of the files in attachments and below are older than 5 days. Why? Is that normal? using dovecot 2:2.3.1-1 from the official repos. -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebrandt(a)charite.de | https://www.charite.de

2 3

assertion failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE)
by Giacomo 11 Feb '19

11 Feb '19

I'm running the following: # 2.3.4 (0ecbaf23d): /usr/local/etc/dovecot/dovecot.conf # OS: FreeBSD 11.2-RELEASE-p4 amd64 # FS: ZFS auth_mechanisms = plain login auth_username_format = %Ln listen = * mail_location = maildir:~/Maildir namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { driver = pam } protocols = imap lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } user = dovecot } service imap-login { inet_listener imap { port = 0 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service stats { unix_listener stats-reader { group = mode = 0600 user = } unix_listener stats-writer { group = $default_internal_group mode = 0666 user = } user = $default_internal_user } ssl_cert = </root/cert.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } dmesg shows: pid 74441 (imap), uid 1002: exited on signal 6 pid 74784 (imap), uid 1002: exited on signal 6 pid 21471 (imap), uid 1002: exited on signal 6 pid 21470 (imap), uid 1002: exited on signal 6 pid 21464 (imap), uid 1002: exited on signal 6 pid 21731 (imap), uid 1002: exited on signal 6 Sometimes the dovecot process serving an user crashes. He runs mostly airmail on macOS and samsung mail on Android. Happens only to that particular user. The log shows the following: (maillog) Dec 16 14:52:35 mail dovecot: imap-login: Login: user=<USER>, method=PLAIN, rip=79.12.201.157, lip=192.168.1.28, mpid=74779, TLS, session=<wMQI+iN9VtRPDMmd> Dec 16 14:52:39 mail dovecot: imap(USER)<74441><nLa+7SN9+fhPDMmd>: Panic: file charset-iconv.c: line 83 (charset_to_utf8_try): assertion failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE) Dec 16 14:52:39 mail dovecot: imap(USER)<74441><nLa+7SN9+fhPDMmd>: Fatal: master: service(imap): child 74441 killed with signal 6 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set service imap { drop_priv_before_exec=yes }) I'm here if more info is needed. Thanks for taking a look.

4 7

mbox 2 Maildir
by Tamas Hegedus 08 Feb '19

08 Feb '19

Hi, I am not an professional system admin, but I am running a small debian mail server for many years. It is time to migrate from mbox to Maildir. There is a nice and clean description for doing this without service downtime at https://wiki.dovecot.org/Tools/Doveadm/Sync I have to set per-user config for mailbox type using userdb extra fields. However, I miss some information and I can not find useful info by google. 1. The main question: dovecot will know that for some users the mailbox format is still mbox, but others already have Maildir. I do not see any hint that I should setup postfix/procmail for handling the delivery per-user basis. But I think I have to set this, too. 2. I have not learned much about userdb and it seems that dovecot was written for and used by experts. I mean that the docs/wiki is not enough for me: from the wiki page of userdb it will be for me difficult to setup one. Can you suggest some docs for dummies? Thanks for your help, Tamas dovecot --version 2.2.27 (c0f36b0) postfix 3.1.8 procmail v3.23pre 2001/09/13 -- Tamas Hegedus, PhD Senior Research Fellow MTA-SE Molecular Biophysics Research Group Hungarian Academy of Sciences | phone: (36) 1-459 1500/60233 Semmelweis University | fax: (36) 1-266 6656 Tuzolto utca 37-47 | mailto:tamas@hegelab.org Budapest, 1094, Hungary | http://www.hegelab.org --- This email has been checked for viruses by AVG. https://www.avg.com

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SELinux policy to allow Dovecot to connect to Mysql
by Robert Moskowitz 05 Feb '19

05 Feb '19

As I have noted in previous messages, I been getting the following on my new mailserver: Apr 7 10:17:27 z9m9z dovecot: dict: Error: mysql(localhost): Connect failed to database (postfix): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (13) - waiting for 25 seconds before retry They go away when I setenforce 0. It is not a timing issue as I earlier thought. So I googled dovecot mysql selinux and the only worthwhile hit was: http://zszsit.blogspot.com/2012/12/dovecot-mysql-selinux-issue-on-centos6.h… that provides a /etc/selinux/dovecot2mysql.te and other selinux stuff. Is there a simpler way like a setsbool option? With all the howtos on dovecot with mysql, it is interesting that none of them seem to have this problem. Maybe because they connect to mysql through TCP port 3306 which has ITS set of problems (like MariaDB defaults to not listening on TCP). thanks!

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Error: User bob@aaa.bbb doesn't have home dir set, disabling duplicate database
by subscription1 02 Feb '19

02 Feb '19

I made a mistake when I moved dovecot to a new server and only specified mail_location instead of mail_home All I have in 10-mail.conf is --------- mail_location = maildir:/home/vmail/mailboxes/%d/%n ------------ All emails for the few accounts I have are in these mailboxes and I can get/see them via my mail client I do, however, get the following error -------------------- imap(bob(a)aaa.bbb): Error: User bob(a)aaa.bbb doesn't have home dir set, disabling duplicate database ------------------- After looking at https://wiki2.dovecot.org/VirtualUsers/Home I tried the following -------------------------------- mail_home = /home/vmail/mailboxes/%d/%n mail_location = maildir:~/mail ------------------------------ Problem with this is that I now can't see any of my emails in the client. Appreciate any help on how to fix this. Thanks

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