- dovecot - dovecot.org

[Dovecot] file descriptor errors
by Christian Rößner 08 Dec '13

08 Dec '13

Hi, I use dovecot 2.2.9 on Gentoo Linux and I get lots of these erors in my log file: Dec 4 08:53:37 mx dovecot: auth: Error: close failed in file object destructor: Dec 4 08:53:37 mx dovecot: auth: Error: IOError: [Errno 9] Bad file descriptor What could cause these error messages? My mailboxes are stored on an ext4 filesystem: /dev/vdb1 on /srv/mail type ext4 (rw,noatime) doveconf -n: # OS: Linux 3.11.2-hardened x86_64 Gentoo Base System release 2.2 ext4 auth_master_user_separator = * auth_mechanisms = plain login auth_verbose = yes disable_plaintext_auth = no imap_client_workarounds = tb-extra-mailbox-sep tb-lsub-flags lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_access_groups = mail mail_attachment_dir = /srv/mail/copymail/attachments mail_gid = mail mail_location = maildir:/srv/mail/virtual/%d/%n mail_plugins = quota acl zlib mail_log notify mail_privileged_group = mail mail_uid = vmail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk-E-Mail { auto = subscribe special_use = \Junk } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = INBOX. } passdb { args = /usr/local/sbin/ispcp-decrypt.py driver = checkpassword } plugin { acl = vfile acl_shared_dict = file:/srv/mail/virtual/shared-mailboxes.db quota = dict:User quota::file:/srv/mail/virtual/%d/%n/dovecot-quota quota_rule = *:storage=300M:messages=20000 quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_dir = ~/sieve zlib_save = gz zlib_save_level = 6 } postmaster_address = postmaster(a)deltaweb.de protocols = imap pop3 lmtp sieve service auth-worker { extra_groups = ssl-cert unix_listener auth-worker { mode = 0600 user = vmail } user = vmail } service auth { extra_groups = ssl-cert unix_listener /var/spool/postfix.relay/private/auth { group = postfix mode = 0660 user = postfix } unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { mode = 0660 user = vmail } user = vmail } service config { unix_listener config { mode = 0600 user = vmail } } service dict { unix_listener dict { mode = 0600 user = vmail } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service lmtp { inet_listener lmtp { address = ::1 port = 24 } } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service pop3-login { inet_listener pop3s { port = 995 ssl = yes } } service quota-status { client_limit = 1 executable = quota-status -p postfix inet_listener { port = 12340 } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh unix_listener quota-warning { user = vmail } user = dovecot } ssl_cert = </etc/ssl/certs/mx_deltaweb_de.crt ssl_key = </etc/ssl/private/mx_deltaweb_de.key userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = quota acl zlib mail_log notify sieve } protocol lda { mail_plugins = quota acl zlib mail_log notify sieve } protocol imap { mail_max_userip_connections = 50 mail_plugins = quota acl zlib mail_log notify imap_quota imap_acl imap_zlib } Thanks in advance -Christian Rößner -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein

3 4

[Dovecot] Dovecot readable compressed mail archive
by Dave Hall 08 Dec '13

08 Dec '13

Hello. Is Dovecot able to create and/or read any sort of compressed mail archive? We have a large installation with a few users who need to keep a large amount of email available. With maildir this means a large number of individual files, leading to additional load on our backup process. Even using a compressed mbox file as an archive would help, but only if Dovecot is able to interact with this file seamlessly while keeping current email in the maildir format. Please pardon if this is old business, but I haven't been able to find any reference to it by searching. Thanks. -Dave -- Dave Hall System Administrator Computer Science Binghamton University davehall(a)cs.binghamton.edu 607-760-2328 (Cell) 607-777-4641 (Office)

3 2

[Dovecot] imap crash 2.2.9 hg
by Oli Schacher 08 Dec '13

08 Dec '13

Hi Timo With dovecot built from the latest 2.2.9 hg (342f6962390e) we get imap crashes. This only affects one account which is used by multiple clients. The first few logins seem to work ok, but after a few seconds the log is flooded with Dec 5 13:43:10 team dovecot: imap-login: Login: user=<sales(a)example.com>, method=PLAIN, rip=1.2.3.4, lip=5.6.7.8, mpid=27923, TLS, session=<GeNN38jsHgBNbZEi> Dec 5 13:43:10 team dovecot: imap(sales(a)example.com): Fatal: master: service(imap): child 27923 killed with signal 11 (core dumped) Dec 5 13:43:11 team dovecot: imap-login: Login: user=<sales(a)example.com>, method=PLAIN, rip=1.2.3.4, lip=5.6.7.8, mpid=27925, TLS, session=<NNVS38jsnwBNbZEi> Dec 5 13:43:11 team dovecot: imap(sales(a)example.com): Fatal: master: service(imap): child 27925 killed with signal 11 (core dumped) Dec 5 13:43:11 team dovecot: imap-login: Login: user=<sales(a)example.com>, method=PLAIN, rip=1.2.3.4, lip=5.6.7.8, mpid=27927, TLS, session=<8LxX38jsAgBNbZEi> Dec 5 13:43:11 team dovecot: imap(sales(a)example.com): Fatal: master: service(imap): child 27927 killed with signal 11 (core dumped) [...] messagelog meanwile gets floods of: imap[29173]: segfault at 60 ip 00007f104c160f40 sp 00007fff935a0f58 error 4 in libdovecot-storage.so.0.0.0[7f104c095000+10d000] imap[29175]: segfault at 60 ip 00007fb7247eff40 sp 00007fff8a949578 error 4 in libdovecot-storage.so.0.0.0[7fb724724000+10d000] imap[29177]: segfault at 60 ip 00007f59e4f5df40 sp 00007fff70e884b8 error 4 in libdovecot-storage.so.0.0.0[7f59e4e92000+10d000] imap[29179]: segfault at 60 ip 00007fdda0e68f40 sp 00007fffd3576498 error 4 in libdovecot-storage.so.0.0.0[7fdda0d9d000+10d000] imap[29181]: segfault at 60 ip 00007f60d774af40 sp 00007fffc249aee8 error 4 in libdovecot-storage.so.0.0.0[7f60d767f000+10d000] imap[29183]: segfault at 60 ip 00007fce0da4ff40 sp 00007fff33ff92f8 error 4 in libdovecot-storage.so.0.0.0[7fce0d984000+10d000] imap[29185]: segfault at 60 ip 00007f2e4414ef40 sp 00007fff5888ab28 error 4 in libdovecot-storage.so.0.0.0[7f2e44083000+10d000] imap[29187]: segfault at 60 ip 00007fb0e6d3ef40 sp 00007fff0ed60c58 error 4 in libdovecot-storage.so.0.0.0[7fb0e6c73000+10d000] imap[29189]: segfault at 60 ip 00007f77c8292f40 sp 00007fff4d14bc08 error 4 in libdovecot-storage.so.0.0.0[7f77c81c7000+10d000] imap[29197]: segfault at 60 ip 00007f8366108f40 sp 00007fffd2e060a8 error 4 in libdovecot-storage.so.0.0.0[7f836603d000+10d000] [...] The user with the client on ip 1.2.3.4 tells me he doesn't see any errors in his outlook client, so maybe this crash only affects additional background connections. OS: Centos 6.5, 64 bit (gdb) bt full #0 0x00007f6fdcb9ef40 in mail_index_view_is_inconsistent () from /usr/lib64/dovecot/libdovecot-storage.so.0 No symbol table info available. #1 0x00007f6fdcb4f73b in mailbox_is_inconsistent () from /usr/lib64/dovecot/libdovecot-storage.so.0 No symbol table info available. #2 0x00000000004176dc in client_send_box_error () No symbol table info available. #3 0x0000000000411c46 in cmd_select_full () No symbol table info available. #4 0x0000000000416d6d in command_exec () No symbol table info available. #5 0x0000000000415e90 in ?? () No symbol table info available. #6 0x0000000000415f7d in ?? () No symbol table info available. #7 0x00000000004161fd in client_handle_input () No symbol table info available. #8 0x000000000041656f in client_input () No symbol table info available. #9 0x00007f6fdc87a0c6 in io_loop_call_io () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #10 0x00007f6fdc87b187 in io_loop_handler_run () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #11 0x00007f6fdc87a038 in io_loop_run () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #12 0x00007f6fdc828e43 in master_service_run () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #13 0x000000000041fd58 in main () No symbol table info available. Possibly related to recent change 9946079253c4/"imap: If SELECT fails with "mailbox is inconsistent", disconnect client. (Plus related cleanups.)" ? Is this "mailbox_is_inconsistent" call something I need to worry about? Reverting back to 2.2.7 doesn't show any errors for the affected account. Thanks Oli -- message transmitted on 100% recycled electrons

2 1

Re: [Dovecot] zlib config questions
by Richard Platel 08 Dec '13

08 Dec '13

You only need to add the zlib plugin to mail_plugins once. As far as I know, there's no indication in the logs that mail is being compressed, and the filename isn't modified to indicate that it's compressed, but, of course, the files are zlib data on disk. One gotcha if you're using maildir is, if you're planning to compress old mail, make sure that the S= and W= sizes in the filenames are correct, otherwise dovecot errors and closes the client session, and it can't repair the filename on it's own. On Dec 6, 2013, at 12:51 AM, dovecot-request(a)dovecot.org wrote: > Message: 6 > Date: Thu, 5 Dec 2013 13:55:40 -0800 > From: Terry Barnum <terry(a)dop.com> > To: Dovecot Mailing List <dovecot(a)dovecot.org> > Subject: [Dovecot] zlib config questions > Message-ID: <EF7F46D0-DE03-4B11-85ED-D669DE78D931(a)dop.com> > Content-Type: text/plain; charset=us-ascii > > After nearly running out of space I swapped in larger disks and then saw the recent threads about zlib compression. Unfortunately I'm still confused after reading <http://wiki2.dovecot.org/Plugins/Zlib>. > > In order to compress new email being stored do I only need to change > > 10-mail.conf to this: > mail_plugins = $mail_plugins zlib > > and 90-plugin.conf to this: > plugin { > zlib_save_level = 6 > zlib_save = gz > ... > > Or do I need to instead (or also?) add it to the list of plugins in 20-imap.conf? > > A simple 'sudo doveadm reload' to enable? > > Once enabled, is there an indication in the logs that compression is taking place? > > Do new mail files have a suffix like .Z to indicate they've been compressed? > > Any gotchas to be aware of? > > I'm running macports dovecot 2.2.5. > > Thanks for any help. > > -Terry > > Terry Barnum > digital OutPost > http://www.dop.com

6 7

[Dovecot] No Dovecot 2.2.9 on OpenBSD 5.4 amd64
by Philippe Lelédy 08 Dec '13

08 Dec '13

Hi, First I have this warning when configuring: configure: WARNING: sys/ucred.h: present but cannot be compiled configure: WARNING: sys/ucred.h: check for missing prerequisite headers? configure: WARNING: sys/ucred.h: see the Autoconf documentation configure: WARNING: sys/ucred.h: section "Present But Cannot Be Compiled" configure: WARNING: sys/ucred.h: proceeding with the compiler's result configure: WARNING: ## ---------------------------------- ## configure: WARNING: ## Report this to dovecot(a)dovecot.org ## configure: WARNING: ## ---------------------------------- ## So I do ! Second, make builds fine, but doveconf not: doveconf -n # 2.2.9: /etc/dovecot/dovecot.conf doveconf: Fatal: pool_system_realloc(536870912): Out of memory Because I can't run doveconf, I give the only information I can get dovecot --version 2.2.9 and dovecot --build-options Build options: ioloop=kqueue notify=kqueue ipv6 openssl io_block_size=8192 Mail storages: shared mdbox sdbox maildir mbox cydir imapc pop3c raw fail SQL drivers: Passdb: bsdauth checkpassword passwd passwd-file Userdb: checkpassword passwd prefetch passwd-file Install prefix . : /usr/local File offsets ... : 64bit I/O polling .... : kqueue I/O notifys .... : kqueue SSL ............ : yes (OpenSSL) GSSAPI ......... : no passdbs ........ : static passwd passwd-file checkpassword bsdauth : -shadow -pam -sia -ldap -sql -vpopmail userdbs ........ : static prefetch passwd passwd-file checkpassword : -ldap -sql -vpopmail -nss SQL drivers .... : : -pgsql -mysql -sqlite Full text search : squat : -lucene -solr Ph. Le.

2 1

[Dovecot] bug report: doveadm assertion failure "mail_index_map_lookup_seq_range"
by email-from-bobby 08 Dec '13

08 Dec '13

A negated subject search on an empty folder causes an assertion failure in doveadm. To reproduce: bash-3.2# doveadm mailbox create -u ephraim "Freshly Empty" bash-3.2# doveadm search -u ephraim mailbox "Freshly Empty" NOT subject '***JUNK MAIL***' doveadm(ephraim): Panic: file mail-index-map.c: line 548 (mail_index_map_lookup_seq_range): assertion failed: (first_uid <= last_uid\ ) doveadm(ephraim): Error: Raw backtrace: 2 libdovecot.0.dylib 0x0000000100347463 default_fatal_handler + 486 -> 3 \ libdovecot.0.dylib 0x00000001003472c0 default_fatal_handler + 67 -> 4 libdovecot.0.dylib 0x000\ 0000100347705 i_fatal + 0 -> 5 libdovecot-storage.0.dylib 0x00000001002a799f mail_index_map_lookup_seq_range + 309 -> 6 \ libdovecot-storage.0.dylib 0x00000001002b6d4f mail_index_lookup_seq_range + 12 -> 7 lib20_fts_plugin.so \ 0x00000001003fe325 fts_search_lookup + 3307 -> 8 lib20_fts_plugin.so 0x00000001003fddfb fts_search_lookup + 1985 -\ > 9 lib20_fts_plugin.so 0x00000001003fd6e2 fts_search_lookup + 168 -> 10 lib20_fts_plugin.so 0x00\ 000001003ff148 fts_mailbox_allocated + 1139 -> 11 doveadm 0x00000001001dd3d2 doveadm_mail_iter_init + 1\ 99 -> 12 doveadm 0x00000001001df3ce cmd_search_run + 138 -> 13 doveadm 0x0\ 0000001001d94f9 doveadm_mail_next_user + 196 -> 14 doveadm 0x00000001001d9ad1 doveadm_mail_try_run + 77\ 6 -> 15 doveadm 0x00000001001e1a09 main + 1150 -> 16 libdyld.dylib 0x00007fff915\ ba5fd start + 1 -> 17 ??? 0x0000000000000009 0x0 + 9 Abort trap: 6 bash-3.2# A positive search is no problem: bash-3.2# doveadm search -u ephraim mailbox "Freshly Empty" subject '***JUNK MAIL***' bash-3.2# Version and configuration info: bash-3.2# /Applications/Server.app/Contents/ServerRoot/usr/sbin/dovecotd --version 2.2.5 bash-3.2# /Applications/Server.app/Contents/ServerRoot/usr/sbin/dovecotd -n # 2.2.5: /Library/Server/Mail/Config/dovecot/dovecot.conf # OS: Darwin 13.0.0 x86_64 hfs auth_mechanisms = cram-md5 login apop plain digest-md5 auth_realms = mail.vishniac.com auth_socket_path = /var/run/dovecot/auth-userdb auth_username_format = %n debug_log_path = /Library/Logs/Mail/mail-debug.log default_internal_user = _dovecot default_login_user = _dovenull disable_plaintext_auth = no first_valid_gid = 6 first_valid_uid = 6 hostname = mail.vishniac.com imap_id_log = * imap_id_send = "name" * "version" * imap_urlauth_submit_user = submit info_log_path = /Library/Logs/Mail/mail-info.log log_path = /Library/Logs/Mail/mail-err.log login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c mail_access_groups = mail mail_attribute_dict = file:/Library/Server/Mail/Data/attributes/attributes.dict mail_location = maildir:/Library/Server/Mail/Data/mail/users/%u mail_log_prefix = "%s(pid %p user %u): " mail_plugins = quota zlib acl fts fts_sk managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational \ regex imap4flags copy include variables body enotify environment mailbox date ihave mdbox_rotate_size = 200 M namespace acl-mailboxes { list = children location = maildir:/Library/Server/Mail/Data/mail/users/%%u:INDEX=/Library/Server/Mail/Data/mail/shared/%%u prefix = shared.%%u. separator = . subscriptions = no type = shared } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } namespace list-archives { list = children location = maildir:/Library/Server/Mail/Data/listserver/messages/archive/lists/%%u:INDEX=/Library/Server/Mail/Data/listserver/mess\ ages/archive/shared/%%u prefix = archives.%%u. separator = . subscriptions = no type = shared } passdb { driver = od } passdb { args = /Library/Server/Mail/Config/dovecot/submit.passdb driver = passwd-file } plugin { acl = vfile:/Library/Server/Mail/Config/dovecot/global-acls:cache_secs=300 acl_shared_dict = file:/Library/Server/Mail/Data/shared/shared-mailboxes fts = sk quota = maildir:User quota quota_warning = storage=100%% quota-exceeded %u sieve = /Library/Server/Mail/Data/rules/%u/dovecot.sieve sieve_dir = /Library/Server/Mail/Data/rules/%u stats_refresh = 30 secs stats_track_cmds = yes } postmaster_address = postmaster(a)vishniac.com protocols = imap pop3 lmtp sieve quota_full_tempfail = yes service auth { extra_groups = _keytabusers idle_kill = 15 mins unix_listener auth-userdb { user = _dovecot } } service dict { unix_listener dict { user = _dovecot } } service dns_client { unix_listener dns-client { mode = 0600 } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } service_count = 0 } service imap { client_limit = 5 process_limit = 20 service_count = 0 } service indexer-worker { user = _dovecot } service lmtp { unix_listener lmtp { mode = 0600 } } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { port = 995 ssl = yes } } service pop3 { client_limit = 5 process_limit = 200 service_count = 0 } service quota-exceeded { executable = script /Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/quota-exceeded.sh unix_listener quota-exceeded { group = mail mode = 0660 user = _dovecot } user = _dovecot } service quota-warning { executable = script /Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/quota-warning.sh unix_listener quota-warning { group = mail mode = 0660 user = _dovecot } user = _dovecot } service stats { fifo_listener stats-mail { mode = 0600 user = _dovecot } } ssl_ca = </etc/certificates/mail.vishniac.com.6BC35F87D55C160F0933F54763846F6CC1EB5A81.chain.pem ssl_cert = </etc/certificates/mail.vishniac.com.6BC35F87D55C160F0933F54763846F6CC1EB5A81.cert.pem ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!ADH:!eNULL ssl_key = </etc/certificates/mail.vishniac.com.6BC35F87D55C160F0933F54763846F6CC1EB5A81.key.pem ssl_key_path = /etc/certificates/mail.vishniac.com.6BC35F87D55C160F0933F54763846F6CC1EB5A81.key.pem userdb { args = partition=/Library/Server/Mail/Config/dovecot/partition_map.conf enforce_quotas=no driver = od } userdb { args = /Library/Server/Mail/Config/dovecot/submit.passdb driver = passwd-file } verbose_proctitle = yes protocol lmtp { mail_plugins = quota zlib acl fts fts_sk sieve } protocol lda { mail_plugins = quota zlib acl fts fts_sk sieve } protocol imap { mail_max_userip_connections = 20 mail_plugins = quota zlib acl fts fts_sk imap_acl imap_quota imap_zlib } protocol pop3 { mail_max_userip_connections = 6 } bash-3.2#

3 2

[Dovecot] delete message with specified id
by Костырев Александр Алексеевич 08 Dec '13

08 Dec '13

Good day, everyone! Could someone help me to find a way to delete message with certain id from all users's mailboxes? What seems to be a problem: I have configured exim + dovecot lmtp I got a long list of aliases in BD in form of: +----------+-------------------------------------+ |alias_name recipients | (for example) -----------|-------------------------------------+ | list_a | user1@example.org,user2@example.org | +----------|-------------------------------------+ When I send a message to that list_a, user1 and user2 get the mail and I see this in log: Dec 6 12:12:27 beta-mail dovecot: lmtp(16419, user1(a)example.org) copy from INBOX: box=INBOX, uid=1, msgid=<E1VojxY-0004Gl-Gu@beta-mail>, size=570 Dec 6 12:12:27 beta-mail dovecot: lmtp(16419, user1(a)example.org) oCOXKmAkoVIjQAAA635u4w: msgid=<E1VojxY-0004Gl-Gu@beta-mail>: from=root@beta-mail: subj=: saved mail to INBOX Dec 6 12:12:27 beta-mail dovecot: lmtp(16419, user2(a)example.org) copy from INBOX: box=INBOX, uid=1, msgid=<E1VojxY-0004Gl-Gu@beta-mail>, size=570 Dec 6 12:12:27 beta-mail dovecot: lmtp(16419, user2(a)example.org) oCOXKmAkoVIjQAAA635u4w: msgid=<E1VojxY-0004Gl-Gu@beta-mail>: from=root@beta-mail: subj=: saved mail to INBOX Is it possible to delete these letters with known msgid=<E1VojxY-0004Gl-Gu@beta-mail> from all users mailboxes with couple of simple commands ? How do I do it currently: in exim's log I get mailaddress of a user, get into his mailbox (wich cd), find the letter I need, with ls -i I get inode, search (with find) through all users mails and delete all files with that inode, then I have to rebuild dovecot indexes with doveadm mailbox status -A -t all INBOX -- С уважением, Костырев Александр администратор Linux-систем

2 2

[Dovecot] pigeonhole openssl s_client
by LEVAI Daniel 08 Dec '13

08 Dec '13

Hi! I'm trying to get information about a server certificate from a pigeonhole sieve server. Various connection attempts show only "wrong version number" or "unknown protocol" errors from openssl: $ openssl s_client -connect example.com:4190 { -tls1, -tls1_1, -tls1_2 } [ -starttls { imap, pop3 } ] None of these work. I'm trying to see who signed the server cert. How could I do this? Thanks, Daniel -- LÉVAI Dániel PGP key ID = 0x83B63A8F Key fingerprint = DBEC C66B A47A DFA2 792D 650C C69B BE4C 83B6 3A8F

2 1

[Dovecot] Replication via sneakernet
by David Bishop 07 Dec '13

07 Dec '13

Is there a way to get a running transaction log from a Dovecot instance to synchronize (and I use that word very, very loosely) multiple instances that don't share a network? Why I would want to do such a thing: I have a couple way stations along a long, winding road through very hilly country, and at each of these stations, I have a few people (and many, many more at one end of the road). Which people are where varies from hour to hour (but they're all members of a known, larger, group of people with accounts). It would be helpful to get communication (however limited) along this road (and establishing direct communication, either through radio or landline, is not feasible within the budget constraints I have), and it is possible to store a complete copy of the mail spool to a small box at each station (the total mail spool over the period I care about is in the tens of megs). There are trams shuttling back and forth along this road (stopping at each station), and adding a small box (such as a weatherproofed Raspberry Pi with a wifi dongle) to transport files up and down the road is pretty simple. Doing incremental copies of the mail spool is also simple, keeping track of files that get moved or deleted is a bit harder (but still not that bad), but I have no idea how hard it is to track what messages have been seen, especially for the shared folders (which we use instead of mailing lists). I realize this is not a "normal" use of Dovecot, but given this, does anyone who knows the software (and how it keeps track of messages) better have suggestions on how to approach the problem?

4 6

[Dovecot] Easy migration from Dovecot 1.2.16 ppc maildir to 2.1.17 amd64 mdbox
by Philippe Lelédy 07 Dec '13

07 Dec '13

Hi After http://retrospekt.dk/2011/08/migrating-maildir-to-dovecot-2-0-dbox/ I used a two phases process. The first, transfering over the network, is done by this shell function, on the *new* server. The argument is the <user> fetchOldServer () { rsync -poazuHK --exclude="**/dovecot.index*" \ -e ssh root@oldServer:/var/mail/Maildirs/$1 /var/mail/oldServer/ } I had to add --exclude="**/dovecot.index*" because of a change of endianness (ppc -> amd64). the second, having dovecot import the folder, is done by this second fonction dsync () { doveadm backup -R -u $1(a)mondomaine.fr maildir:/var/mail/oldServer/$1 } this one is really fast. Both in one function doveImport() { fetchOldServer $1 && dsync $1 } I tried for initial load to empty mailbox. I am not sure it will works on a non empty mailbox. But would be nice, as it would allow a fast last minute sync before switch, minimizing downtime. Ph. Le

2 1