December 2013 - dovecot

[Dovecot] LDA quota rejection
by Davide 09 Jan '14

09 Jan '14

Hi to all, i have dovecot 2.2.5 and i have implemented lda rejection through quota full this is my dovecot conf protocol lda { mail_fsync = optimized auth_socket_path = /usr/local/var/run/dovecot/auth-userdb deliver_log_format = msgid=<%f>-<%s>-%m: %$ hostname = mail.cgilfe.it info_log_path = /var/log/dovecot/dovecot-deliver.log log_path = /var/log/dovecot/dovecot-deliver.log mail_plugin_dir = /usr/local/lib/dovecot mail_plugins = $mail_plugins mail_log sieve postmaster_address = postmaster(a)mail.cgilfe.it rejection_subject = Rifiutato: %s rejection_reason = Messaggio a <%t> automaticamente rifiutato:%n%r submission_host = 192.16X.XXX.XX0 } If user over quota receive a messagge internally all is ok but if the user receive a mail from external domains nothing to the sender is sentback. Thanks in advance to all for possible help. -- *Davide Marchi* *T*eorema *F*errara *Srl* Via Spronello, 7 - Ferrara - 44121 Tel. *0532783161* Fax. *0532783368* E-m@il: *davide.marchi(a)mail.cgilfe.it* Skype: *davide.marchi73* Web: *http://www.cgilfe.it* *CONFIDENZIALITA'* *Ai sensi del D.Lgs. 196/2003 si precisa che le informazioni contenute in questo messaggio sono riservate ed a uso esclusivo del destinatario/dei destinatari. Qualora il messaggio in parola Le fosse pervenuto per errore, La invitiamo ad eliminarlo senza copiarlo e a non inoltrarlo a terzi, dandocene gentilmente comunicazione.* *Per favore, pensa all'ambiente. Stampa questa email solo se necessario.*

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[Dovecot] LMTP with virtual and system users
by Philipp Kolmann 08 Jan '14

08 Jan '14

Hi, I have a mailsystem where i have some local users with shell access and full home dirs which receive mail and also several SQL virtual users only for mail. With the virtual users, everything works fine. Mail is delivered via LMTP and also sieve works :) The SQL Lookup knows what to do with username(a)domain.com The problem is the system user. If exim delivers the mail to the lmtp socket, the LMTPd can't find username(a)local.host I would be able to specify the global auth_username_format=%n but then my SQL queries break and I like the possibility to have xx(a)domain1.com and xx(a)domain2.com routed to two different accounts. As I have seen in the source, I can't specify username_format=%n in the passdb { driver = pam } backend. Do you have any suggestion how to solve this issue? thanks Philipp

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[Dovecot] how to separate virtual delivery and authentication?
by Mihai Badici 08 Jan '14

08 Jan '14

I have a "pure ldap" setting with postfix and dovecot. When using dovecot delivery, the recipient is checked via ldap. The same ldap query is used when authenticate. So, if I want to authenticate with the uid , I can't use a filter like uid=%u because the delivery will fail. I don't want to use %nor something else because I could use multiple e-mail addresses on a single account. I actually use a filter like ( mail=%u)|(uid=%u) but I think for more complex situations should be better to have two separate filters, one for authentication and the other for the delivery. What is your oppinion? -- Mihai Bădici http://mihai.badici.ro

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[Dovecot] RFE: IMAP LIST Extension for Special-Use Mailboxes
by Patrick Ben Koetter 03 Jan '14

03 Jan '14

Timo, would you consider adding support for "IMAP LIST Extension for Special-Use Mailboxes" <http://www.rfc-editor.org/rfc/rfc6154.txt> any time near in the future? I would really love to get rid of all those folders created by all those different mail clients just because they can't agree to use the same folder for special purpose. Obviously clients need to support it too. Having Dovecot support it certainly would make them adopt the standard sooner. p@rick -- state of mind Digitale Kommunikation http://www.state-of-mind.de Franziskanerstraße 15 Telefon +49 89 3090 4664 81669 München Telefax +49 89 3090 4666 Amtsgericht München Partnerschaftsregister PR 563

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[Dovecot] How to add dovecot plugin?
by Timothy Murphy 31 Dec '13

31 Dec '13

I'm running dovecot version 2.0.9 under CentOS-6.5 . I want to add the following plugin: ==================== require "fileinto"; if header :contains "X-Spam-Flag" "YES" { fileinto "Spam"; } ==================== Could some kind soul tell me where exactly I should place this script (eg "anywhere in /etc/dovecot/dovecot.conf" or "anywhere in /etc/dovecot/conf.d/90-plugin.conf"), and do I need to take any other action? Actually, the folder I should like spam to go to is ~/Maildir/.Spam/cur/ - should I modify the above script? If these queries are anwered clearly in some dovecot documentation, please point me to that. -- Timothy Murphy e-mail: gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin 2, Ireland

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Re: [Dovecot] pop3 rate limit
by michael 30 Dec '13

30 Dec '13

On 2013-12-29 02:05, Christian Rößner wrote: > Hi, > > we have customers with Exchange servers that are polling for new mail > every minute with dozens of pop3 accounts. I am looking for a > mechanism to rate limit this per user. So what I am looking for is a > way to block users from polling, if a user asks for new mail more > than > every 5 minutes (for example). > > Is this possible? Can this be achieved within Dovecot or does it need > external scripting? (I thought about fail2ban, but also want IPv6 > support) > > Thanks in advance > > -Christian Rößner See: www.policyd.org You'll need to use v2.1 to get IPV6 support. Michael Hallager

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[Dovecot] Warning: fscking index file /.../dovecot.index
by Alex Vitola 30 Dec '13

30 Dec '13

We have often found the below error in VPS servers using OpenVZ, and some cases using OpenStack, in neither case is used for storage or sharing ISCSI or NFS Client can not receive messages via POP3 or IMAP In /var/log/maillog the message below is seen Oct 31 15:28:26 vps dovecot: pop3(user(a)domain.com): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0 [0x2b3718e07400] -> /usr/lib64/dovecot/libdovecot.so.0 [0x2b3718e07456] -> /usr/lib64/dovecot/libdovecot.so.0 [0x2b3718e06df3] -> /usr/lib64/dovecot/libdovecot-storage.so.0 [0x2b3718b6566b] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_sync_commit+0x89) [0x2b3718b5ced9] -> /usr/lib64/dovecot/libdovecot-storage.so.0 [0x2b3718aeae4d] -> /usr/lib64/dovecot/libdovecot-storage.so.0 [0x2b3718aea357] -> /usr/lib64/dovecot/libdovecot-storage.so.0 [0x2b3718aea698] -> /usr/lib64/dovecot/libdovecot-storage.so.0(maildir_storage_sync_init+0xbb) [0x2b3718aea83b] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x31) [0x2b3718b15e31] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync+0x27) [0x2b3718b18537] -> dovecot/pop3(client_create+0x332) [0x405702] -> dovecot/pop3 [0x40414b] -> dovecot/pop3 [0x404708] -> /usr/lib64/dovecot/libdovecot.so.0 [0x2b3718dc9a52] -> /usr/lib Both POP3 as IMAP Oct 31 15:24:42 vps dovecot: imap(user(a)domain.com): Warning: fscking index file /home/user/mail/domain.com/user/dovecot.index Oct 31 15:28:26 vps dovecot: pop3(user(a)domain.com): Warning: fscking index file /home/user/mail/domain.com/user/dovecot.index Today I do to solve this the procedure below - Access the directory mailbox - Remove files dovecot.index * - Run the command doveadm index-u $ user @ $ domain-q INBOX The question is for what reason this only occurs with VPS servers, I do not find this error on any single physical server to virtual and dovecot settings are the same. att Alex Vitola

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[Dovecot] dovecot 2.2.10 - imap: Error: Can't load plugin imap_stats_plugin:
by giovanni＠neweden.uk.to 30 Dec '13

30 Dec '13

dovecot 2.2.10 is raising this error on my installation. Dec 30 13:57:59 imap: Error: Can't load plugin imap_stats_plugin: Plugin stats must be loaded also (you must set: mail_plugins=$mail_plugins stats) Dec 30 13:57:59 imap: Fatal: Couldn't load required plugins This error occurs at logging phase. The dovecot configuration looks correct to me, here below an excerpt of it: ... ... mail_plugins=$mail_plugins stats protocol imap { mail_plugins = $mail_plugins imap_stats } plugin { # how often to session statistics stats_refresh = 30 secs # track per-IMAP command statistics stats_track_cmds = yes } ... ... I was already using this configuration but only now I am getting this error. From STRACE I see that the stat plugin is correctly localed . Is anybody else getting this error? or am I missing something? Here below an except of the strace message. [pid 17112] open("/usr/local/lib/dovecot/lib95_imap_stats_plugin.so", O_RDONLY) = 14 [pid 17112] read(14, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`\t\0\0004\0\0\0"..., 512) = 512 [pid 17112] fstat64(14, {st_mode=S_IFREG|0755, st_size=53122, ...}) = 0 [pid 17112] mmap2(NULL, 8908, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 14, 0) = 0xf7609000 [pid 17112] mmap2(0xf760b000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 14, 0x1) = 0xf760b000 [pid 17112] close(14) = 0 [pid 17112] open("/usr/local/lib/dovecot/lib90_stats_plugin.so", O_RDONLY) = 14 [pid 17112] read(14, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0@\24\0\0004\0\0\0"..., 512) = 512 [pid 17112] fstat64(14, {st_mode=S_IFREG|0755, st_size=100054, ...}) = 0 [pid 17112] mmap2(NULL, 20320, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 14, 0) = 0xf7604000 [pid 17112] mmap2(0xf7608000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 14, 0x3) = 0xf7608000 [pid 17112] close(14) = 0 [pid 17112] write(2, "\1\01017112 prefix=imap: \n", 22) = 22 [pid 17112] write(2, "\1\00417112 Can't load plugin imap_s"..., 127) = 127 [pid 17112] munmap(0xf7609000, 8908) = 0 [pid 17112] munmap(0xf7604000, 20320) = 0 [pid 17112] write(2, "\1\00517112 Couldn't load required p"..., 39) = 39 [pid 17112] exit_group(89) = ? Process 17112 detached

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[Dovecot] dsync-local crashes due to assertion failures
by Fabian Groffen 30 Dec '13

30 Dec '13

Hi, I have two servers that share nothing, running dovecot version 2.2.9. The first server hosts the original mail base, which I want to sync using dovecot to the second server. With some trial and error I managed to get synchronisation running using tcp sockets. Now for some accounts I see dsync-local crashing on the server that has the original mail base (which is still the only of the two that receives new mail). The log shows: Dec 8 03:13:14 zeus dovecot: dsync-local(someuser): Panic: file mail-index-tr ansaction-export.c: line 203 (log_append_ext_hdr_update): assertion failed: (u32 .offset + u32.size <= ext_hdr_size) Dec 8 03:13:14 zeus dovecot: dsync-local(someuser): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0x70ea0) [0x7f3ee4137ea0] -> /usr/lib64/dovecot/libdovecot.so.0(+0x70efe) [0x7f3ee4137efe] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f3ee40ebd2c] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_transaction_export+0xbed) [0x7f3ee442e89d] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x89104) [0x7f3ee442d104] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_transaction_commit_full+0xb2) [0x7f3ee442d592] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_transaction_commit+0xc) [0x7f3ee442d63c] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_sync_commit+0xb6) [0x7f3ee44372b6] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x335d6) [0x7f3ee43d75d6] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x328bc) [0x7f3ee43d68bc] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x32d83) [0x7f3ee43d6d83] -> /usr/lib64/dovecot/libdovecot-storage.so.0(maildir_storage_sync_init+0xd9) [0x7f3ee43d7199] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x2e) [0x7f3ee43e7f2e] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync+0x27) [0x7f3ee43e8047] -> dovecot/doveadm-server(dsync_brain_master_send_mailbox+0xcf) [0x41f17f] -> dovecot/doveadm-server(dsync_brain_run+0x2c8) [0x41d738] -> dovecot/doveadm-server() [0x41dd70] -> dovecot/doveadm-server() [0x42eda0] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f3ee41495a6] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0xbd) [0x7f3ee414a62d] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f3ee4149008] -> dovecot/doveadm-server() [0x41bb6c] -> dovecot/doveadm-server() [0x40ee3b] -> dovecot/doveadm-server() [0x419581] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f3ee41495a6] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0xbd) [0x7f3ee414a62d] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f3ee4149008] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f3ee40f1643] Dec 8 03:13:14 zeus dovecot: dsync-local(someuser): Fatal: master: service(doveadm): child 14116 killed with signal 6 (core dumps disabled) It seems that despite these crashes, some data is being transferred. Newer accounts seem not to have problems, this happens with older accounts only, for as far as I can see. I tried removing the index files, but that didn't seem to help. Any ideas on what I can do here? Both servers are configured to use maildir storage. Thanks, Fabian -- Fabian Groffen Gentoo on a different level

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[Dovecot] pop3 rate limit
by Christian Rößner 30 Dec '13

30 Dec '13

Hi, we have customers with Exchange servers that are polling for new mail every minute with dozens of pop3 accounts. I am looking for a mechanism to rate limit this per user. So what I am looking for is a way to block users from polling, if a user asks for new mail more than every 5 minutes (for example). Is this possible? Can this be achieved within Dovecot or does it need external scripting? (I thought about fail2ban, but also want IPv6 support) 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

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