July 2014 - dovecot - dovecot.org

Assertion virtual-storage.c
by Thomas Leuxner 06 Jul '14

06 Jul '14

# 2.2.13 (dffc6dd2be0d): /etc/dovecot/dovecot.conf # OS: Linux 3.14-0.bpo.1-amd64 x86_64 Debian 7.5 Latest HG has issues with Virtual Mailboxes. I was unable to get it dump a core. Jul 5 07:46:51 nihlus dovecot: imap(tlx(a)leuxner.net): Panic: file virtual-storage.c: line 326 (virtual_backend_box_open): assertion failed: (!bbox->box->opened) Jul 5 07:46:51 nihlus dovecot: imap(tlx(a)leuxner.net): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x6ce3f) [0x7fe9e733ee3f] -> /usr/lib/dovecot/libdovecot.so.0(+0x6ce9e) [0x7fe9e733ee9e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fe9e72f796e] -> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(+0xa1d4) [0x7fe9e5ae01d4] -> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(+0xa237) [0x7fe9e5ae0237] -> dovecot/imap(cmd_idle+0x45) [0x410595] -> dovecot/imap(command_exec+0x3c) [0x41849c] -> dovecot/imap() [0x4174e0] -> dovecot/imap() [0x417574] -> dovecot/imap(client_handle_input+0x115) [0x417855] -> dovecot/imap(client_input+0x72) [0x417c02] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x4e) [0x7fe9e735002e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xd7) [0x7fe9e7351057] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x7fe9e73500b9] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7fe9e7350138] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fe9e72fcdd3] -> dovecot/imap(main+0x298) [0x40c238] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7fe9e6f65ead] -> dovecot/imap() [0x40c39d] Jul 5 07:46:51 nihlus dovecot: imap(tlx(a)leuxner.net): Fatal: master: service(imap): child 37155 killed with signal 6 (core not dumped) Regards Thomas

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Re: number of users
by Andreas Tauscher 05 Jul '14

05 Jul '14

> No, this will not do it. Any user coming from an HTTP connection will > appear very briefly on the Dovecot server and is unlikely to appear > on the "doveadm who" list. This is a result of the HTTP > connectionless protocol, nothing to do with Dovecot (ie > connects-carries a brief data > transmission/commands-disconnects-connects again after a > predetermined time). The connection time is very brief, even though > you can probably catch a few if you insist on typing doveadm who. If like from Nick Edwards suggested a imapproxy is used it will. imapproxy is keeping the connection open. doveadm who will give you a list of all actual logged in users. Without imapproxy you are right: Every page reload will cause a login and a logoff. I get some webmail users by "accident". To get an overview how many users used roudcube within a period check the database table users/last_login. Andreas

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Disable user login for a few seconds ?
by Florent B 05 Jul '14

05 Jul '14

Hi all, I need to move e-mail files of my users from one file system to another. I use a MySQL backend on Dovecot 2.1. How can I do to disable temporary an account while moving files ? I have an "active" bit in my DB, but if I set it to 0, my MX servers are bouncing mails. How can I do to disable temporary an account ? In fact, I need dovecot not to do any change on files... I think I could change account password for a while, and reset it after migration, but it will disturb connected users. Maybe I could chmod 0 files on my old file system during migration ? How Dovecot will act ? Thank you :) Flo

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Shared Mailbox + LDAP Easy with this script
by Allan Cassaro 05 Jul '14

05 Jul '14

Hello guys, After some hours fighting with shared mailbox, I finally understand how it works - and, realy, I can't believe how easy it is! So, to help others like me and to improve the shared mailbox with Dovecot this script does all the "hard work". I don't know if this group permit attachments, so, let's the link: https://sites.google.com/site/allancassaro/mkshared.tar.gz Enjoy! ===== From README file ===== This is a simple code to help with Dovecot Public Shared Mailbox function. Just configure a public shared mailbox with ACLs, change the configuration file and run this program. How it works: 1) The program connect to the LDAP server and fetch groups from it (with ldap filter) 2) With groups, it fetches the members and owners (or any attribute you want); 3) It will walk into the "shared folder" folder base directory and: 3.1) Rename any directory that was renamed in LDAP (based on entryUUID ldap attribute); 3.2) Create diretories and skeletion (new, cur and tmp) of any group that exists in LDAP; 3.3) Optionaly, remove any "orphan" directory (wihtout a ldap entrey); Example: dn: cn=Everyone,ou=Shared_Mailbox, dc=example,dc=com objectClass: labeledURIObject objectClass: top objectClass: groupOfURLs cn: Everyone labeledURI: ldap:///ou=Users,dc=example,dc=com?uid?one?(objectClass=person) member: uid=user2,ou=users,dc=example,dc=com member: uid=user3,ou=users,dc=example,dc=com member: uid=user1,ou=users,dc=example,dc=com member: uid=user.surname,ou=users,dc=example,dc=com owner: uid=user4,ou=Users,dc=example,dc=com This will create a folder tree like this: /path/toshared/.Everyone /path/toshared/.Everyone/new /path/toshared/.Everyone/cur /path/toshared/.Everyone/tmp With permission file (/path/toshared/.Everyone/dovecot-acl): user=user1 lr ... user=user.surname lr user=user4 lrwstipekxa Hope this helps you! Enjoy. -- Use cópia oculta (BCC ou CCO) e apague dados pessoais no campo da mensagem ao encaminhar qualquer e-mail. http://allan.cassaro.googlepages.com

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Shared Mailbox + LDAP Easy with this script
by Allan Cassaro 04 Jul '14

04 Jul '14

Hello guys, After some hours fighting with shared mailbox, I finally understand how it works - and, realy, I can't believe how easy it is! So, to help others like me and to improve the shared mailbox with Dovecot this script does all the "hard work". I don't know if this group permit attachments, so, let's the link: https://sites.google.com/site/allancassaro/mkshared.tar.gz Enjoy! ===== From README file ===== This is a simple code to help with Dovecot Public Shared Mailbox function. Just configure a public shared mailbox with ACLs, change the configuration file and run this program. How it works: 1) The program connect to the LDAP server and fetch groups from it (with ldap filter) 2) With groups, it fetches the members and owners (or any attribute you want); 3) It will walk into the "shared folder" folder base directory and: 3.1) Rename any directory that was renamed in LDAP (based on entryUUID ldap attribute); 3.2) Create diretories and skeletion (new, cur and tmp) of any group that exists in LDAP; 3.3) Optionaly, remove any "orphan" directory (wihtout a ldap entrey); Example: dn: cn=Everyone,ou=Shared_Mailbox,dc=example,dc=com objectClass: labeledURIObject objectClass: top objectClass: groupOfURLs cn: Everyone labeledURI: ldap:///ou=Users,dc=example,dc=com?uid?one?(objectClass=person) member: uid=user2,ou=users,dc=example,dc=com member: uid=user3,ou=users,dc=example,dc=com member: uid=user1,ou=users,dc=example,dc=com member: uid=user.surname,ou=users,dc=example,dc=com owner: uid=user4,ou=Users,dc=example,dc=com This will create a folder tree like this: /path/toshared/.Everyone /path/toshared/.Everyone/new /path/toshared/.Everyone/cur /path/toshared/.Everyone/tmp With permission file (/path/toshared/.Everyone/dovecot-acl): user=user1 lr ... user=user.surname lr user=user4 lrwstipekxa Hope this helps you! Enjoy. -- Use cópia oculta (BCC ou CCO) e apague dados pessoais no campo da mensagem ao encaminhar qualquer e-mail. http://allan.cassaro.googlepages.com

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Shared folders not listed by IMAP
by Bambero 04 Jul '14

04 Jul '14

Hello I just upgraded my system and there is a problem with shared mailboxes. When I use the doveadm command I can see shared folders: doveadm mailbox list -u 'test(a)mydomain.pl' Drafts Sent Spam Trash Shared Virtuals Virtuals/all Shared/test2(a)mydomain.pl Shared/test2(a)mydomain.pl/Sent INBOX But I can't see them over IMAP protocol. Some config opts: valid_chroot_dirs = /var/mail mail_chroot = /var/mail namespace { type = shared separator = / prefix = Shared/%%u/ location = maildir:/%%u/Maildir:INDEX=~/Maildir/Shared/%%u subscriptions = yes list = yes } plugin { acl = vfile:cache_secs=5 } plugin { acl_shared_dict = file:/var/mail/%i.db } protocol imap { mail_plugins = $mail_plugins imap_quota imap_acl imap_zlib } My version of dovecot is 2.2.10. Regards Bambero

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[Dovecot] dovecot/lmtp munmap()-ing a lot
by Ralf Hildebrandt 04 Jul '14

04 Jul '14

I observed several long running dovecot/lmtp processes hogging the CPU. I then strace'd them (strace -c -p 6375) and found them munmap()-ing a lot: % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 97.18 19.592537 1878 10430 munmap 2.28 0.458984 36 12696 epoll_ctl 0.26 0.052926 10 5288 fdatasync 0.21 0.042472 3 13679 epoll_wait ... snip ... Why would that happen? (dovecot 2.1.17) -- [*] 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, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein

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[Dovecot] dovecot: disable ssl compression
by Andreas Schulze 04 Jul '14

04 Jul '14

Hello, Our "it-security" department asked me about Qualys warnings like -> SSL/TLS Compression Algorithm Information Leakage Vulnerability As far as I learned it's compression inside ssl. postfix-2.11 knows 'tls_ssl_options = no_compression' ( see http://www.postfix.org/postconf.5.html#tls_ssl_options ) is the something comparable in dovecot too? Looks like most extensions in ssl exist only to be disabled :-/ Thanks Andreas

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number of users
by ihab 04 Jul '14

04 Jul '14

Hello, i using roundcube with dovecot, i have a question if there is possible to know the number of users that using the mail system (in other word the online users) . thanks, best regards, ihab :) -- View this message in context: http://dovecot.2317879.n4.nabble.com/number-of-users-tp48701.html Sent from the Dovecot mailing list archive at Nabble.com.

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mixing Maildir and mdbox
by gustavo panizzo <gfa> 04 Jul '14

04 Jul '14

Hello i'm in the process to architect a new email system. i plan to use dovecot 2.2.9 (debian's wheezy). i would like to use maildir for 2 folders on each account (spam and no-spam) and the rest of the folders stored on mdbox. this should be opaque to my users. the reason for this, is i want to be able to train my anti-spam tools, but they read maildir or mbox, they don't read mdbox or dbox. but i want the other folders as mdbox (performance, backups, alternate storage) is there any way?, i prefer if is configurable in advance for all accounts but i could live with something that is done after account is created thanks! -- 1AE0 322E B8F7 4717 BDEA BF1D 44BB 1BA7 9F6C 6333

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