May 2009 - dovecot - dovecot.org

[Dovecot] cmd_append_continue_parsing assertion failure
by Mike Abbott 15 May '09

15 May '09

Dovecot-1.1.14 on Mac OS X. Panic: IMAP(user): file cmd-append.c: line 266 (cmd_append_continue_parsing): assertion failed: (ctx->count == uid2 - uid1 + 1) Trivially reproducible: $ telnet mailserver 143 a login user password b append inbox Backtrace: 0 libSystem.B.dylib 0x00007fff8458aa92 __kill + 10 1 libSystem.B.dylib 0x00007fff84606a1c abort + 83 2 imap 0x0000000100069f3e default_fatal_finish + 70 3 imap 0x0000000100069f8c i_syslog_fatal_handler + 0 4 imap 0x00000001000696eb i_info + 0 5 imap 0x0000000100001406 cmd_append_continue_parsing + 434 6 imap 0x00000001000017a3 cmd_append + 407 7 imap 0x000000010000677e client_command_input + 33 8 imap 0x000000010000693f client_command_input + 482 9 imap 0x0000000100006a3e client_handle_input + 239 10 imap 0x0000000100006bc2 client_input + 148 11 imap 0x0000000100070f83 io_loop_handler_run + 272 12 imap 0x0000000100070348 io_loop_run + 55 13 imap 0x000000010000db95 main + 1635 14 imap 0x0000000100001010 start + 52

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[Dovecot] Filesystems (was Re: Migration questions...)
by Seth Mattinen 15 May '09

15 May '09

Richard Hobbs wrote: > > Trouble is... i've been googling this as well, just now, and loads of > people say XFS has the better performance, but loads of other people say > ReiserFS has the better performance. It starts to become a religious argument at some point. > We have battery backed up RAID controllers too, in this new system, and > the systems are UPSd, so on that basis i'm still none the wiser! lol > > I appreciate your experience with XFS is a positive one, but even the > dovecot web site says XFS might now be a good choice... > > http://wiki.dovecot.org/MailboxFormat/Maildir > > What a tough decision! I know it probably won't make too much difference > in my situation, but i want this to be a very long-term solution, so > want to do it right first time! > > Any other opinions on XFS vs Reiserfs with Dovecot maildir? > > Thanks again! > > Richard. > If you have time to play "tweak the filesystem": http://everything2.com/index.pl?node_id=1479435 It's a good comparison of etx3, xfs, and reiser from a performance standpoint. Also try this if you want to pull the plug or randomly reboot and see what happens: http://brad.livejournal.com/2116715.html ~Seth

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[Dovecot] Filesystem experience question was Migration questions
by Stewart Dean 15 May '09

15 May '09

Doing a cursory Google scan on journaled Linux filesystems, it seems that the three ground-up journaled FSes: XFS, reiser and JFS all have their separate strong points but all compare favorably. Reiser does a better job with many small files...which would seem to be the reality of maildir formatted inboxes. Any comments on that? Any war stories, that is, any comments on reliability, availability and recoverability of them. Support issues? Possible down the road orphaning? Is FS quotaing support and does it work well with a lot (for me that means 4000) users? Anybody using IBM's open source JFS? I currently use AIX and it's been as dependable as a hammer there. In some 20 years with AIX, I can count on the fingers of one hand the number of times that I've had to use fsck. We had one set of machines that would drop hard 2-3x a week due to a bad main electrical trunk splice....2 or 3 years of that and the worst I ever saw was having to BRS once every two months or so. OTOH, I distrust IBM's commitment to the little shop and affordable entry machines: this is fast vanishing in the pSeries/AIX world...or else we wouldn't be moving towards Linux. Thanks! Feel free to contact me offline if you deem this marginally related to DC. -- ==== Once upon a time, the Internet was a friendly, neighbors-helping-neighbors small town, and no one locked their doors. Now it's like an apartment in Bed-Stuy: you need three heavy duty pick-proof locks, one of those braces that goes from the lock to the floor, and bars on the windows.... ==== Stewart Dean, Unix System Admin, Bard College, New York 12504 sdean(a)bard.edu voice: 845-758-7475, fax: 845-758-7035

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[Dovecot] Migration questions...
by Richard Hobbs 15 May '09

15 May '09

Hi All, We are soon to migrate our mail server from one piece of hardware to another and we would like to take this opportunity to optimize things. As a result, we would like to replace "uw-imapd" and "qpopper" with "dovecot". The version we will be installing is 1.1.13-2, as this is what is available through the latest Debian stable backports. We will also be using exim to deliver mail (through dovecot's deliver mechanism, of course). So... We are currently using the mbox format with uw-imapd, and would like to migrate to the fastest solution possible with dovecot on the new hardware. My understanding is that "multi-dbox" is not an option in this version anyway, maildir is OK, but not great, and "single-dbox" is therefore going to be the highest performing solution. Is single-dbox the fastest way to go, considering we're going to be using email in the following ways: - IMAP connections with all email in the Inbox (Gmail-style). - IMAP connections with email split into many IMAP folders. - POP3 connections with no email left on the server. - POP3 connections with *all* email left on the server. All connections check for new mail every 5 minutes (on average) and there are 50-60 users). Also, we are not able to change user behaviour in this instance, unfortunately. Can anyone see any problems with the above proposal? Hopefully not... One problem that may arise is the fact that when we migrate, all msg UIDs will be lost. If i'm not mistaken, this means that all emails will be treated by the mail client as brand new, and if through IMAP, will all go bold, and if through POP3, will all be downloaded again (if still on the server) and therefore duplicated in the mail client. If this is the case, is there anything we can do to stop this happening? Does the "Convert" plugin does this job well? Finally, I have a rough draft of our migration plan - is there anything horribly wrong in it that's going to cause lots of problems, that anyone can spot by any chance? 1. Install Debian with exim, mysqld (for Horde/IMP) and mailman. 2. Run an online update. 3. Rsync homedirs and inboxes onto new server, ready for initial exim configuration. 4. Configure exim as per existing mail server and test that mailing lists and normal email works. You should now have the existing mail delivery solution on the brand new hardware. 5. Once mail delivery is sorted, add "deb http://www.backports.org/debian lenny-backports main contrib non-free" into "/etc/apt/sources.list" and run "aptitude update && aptitude install debian-backports-keyring && aptitude update". 6. Install dovecot (at the time of writing, this was version 1.1.13-2) and configure to use existing mbox files (inboxes in /var/spool/mail/ and IMAP folders in /home/user/mail/) 7. Setup exim to use dovecot's "deliver" mechanism for interacting with the inboxes (which are still in mbox format). 8. Configure the "convert" plugin to begin converting the mail to dbox format. 9. Run something manually (if possible) to convert mailboxes before people connect, so the task is already done by the time the outage is over. 10. Give staff access to new speedy mail server! Thanks in advance, people - any help is greatly appreciated! :-) Richard. -- Richard Hobbs (IT Specialist) Toshiba Research Europe Ltd. - Cambridge Research Laboratory Email: richard.hobbs(a)crl.toshiba.co.uk Web: http://www.toshiba-europe.com/research/ Tel: +44 1223 436999 Mobile: +44 7811 803377

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[Dovecot] IMAP subfolders and MBOX format
by Frank Bonnet 14 May '09

14 May '09

Hello folks I have a problem related to the mbox format I think First we use MBOX format with Dovecot 1.14 A user's here need to create some subfolders in his Imap space. Due to the use of MBOX format this is impossible from thunderbird as you cannot creat a directory in a file :-) So to help him I created manually on the mail server some directories into his imap space, Doing so we are able to see the folder and subfolders but it is not possible to move some other folders into the subfolder via the thunderdird client. Anyone to help me a bit ? Note : on another machine which use the Maildir format I can do whatever I want without problem. Thanks a lot.

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[Dovecot] id:N13388 Disable storage of messages on server when read (pop3)
by Dimitrios Karapiperis 14 May '09

14 May '09

Hi there Is there any way in dovecot to disable the storage of messages on server when they are read/downloaded by the users (POP3). The server keeps the e-mail when users tick the option on their MUA to keep (leave) messages on server. dovecot 1.0.7 POP3 / maildir Thanks in advance Dimitrios Karapiperis postmaster [at] thessaloniki [dot] gr

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[Dovecot] What's faster for getting mails into Rails: Dbmail & direct MySQL or net/pop with maildir
by Olaf Spaarmann 14 May '09

14 May '09

Hi, it's my first message in this list, so please excuse any mistakes! I have a quite specific problem and nobody in the Ruby on Rails lists could help me, because it is actually more a question for mail- experts. So I hope you can help me. I'm planning to set up a mailserver using dovecot. Users of my Rails App can forward their emails (john(a)doe.com) to an personal address (john.doe(a)myapp.com ). These emails will be received by my mailserver. So far so good, the tricky part is to get the mails into my Rails App for processing them. After that they will be deleted (so I'll never accumulate a big ammount of mails on the mailserver). I thought of 2 different approaches. 1) Just use a normal Dovecot setup, using maildir and get the mails with a mailpoller script, connecting to the server via Pop3 2) Use Dbmail for storing the emails, don't use Pop3 but let the mailpoller script connect to the database directly I understand that Dbmail seems to be slower than maildir (in terms of processing many incoming mails) but I'm not sure if a connection via net/pop (of the mailpoller script) is maybe that much slower than mysql that it wouldn't matter at all. What's your opinion? I'm gratefull for every hint. Thanks

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[Dovecot] X-UIDL Ignored?
by Benjamin Wakefield 14 May '09

14 May '09

Hello! I am trying to migrate from Teapop to Dovecot. I'm using Dovecot 1.1.14. I need to make use of the X-UIDL header so clients don't download messages they've already received. I have the X-UIDL head in the message. I have pop3_reuse_xuidl(pop3): yes My problem is the X-UIDL in the message is being ignored and Dovecot is still generating it's own. The INBOX is an mbx file not Maildir. Should this work? Have I missed something? Thanks! Ben ==== BEGIN dovecot -n ==== # 1.1.14: /usr/local/dovecot-1.1.14/etc/dovecot.conf # OS: Linux 2.6.24.3-smp i686 Slackware 12.0.0 log_path: /usr/local/dovecot-1.1.13/var/log/dovecot.log protocols: imap imaps pop3 listen(default): * listen(imap): * listen(pop3): *:10100 ssl_disable: yes disable_plaintext_auth: no login_dir: /usr/local/dovecot-1.1.14/var/run/dovecot/login login_executable(default): /usr/local/dovecot-1.1.14/libexec/dovecot/imap-login login_executable(imap): /usr/local/dovecot-1.1.14/libexec/dovecot/imap-login login_executable(pop3): /usr/local/dovecot-1.1.14/libexec/dovecot/pop3-login login_greeting: grape.dcsi.net.au dovecot pop3/imap server, go ahead. mail_location: mbox:~/mail:INBOX=/var/mail/%1u/%u mail_executable(default): /usr/local/dovecot-1.1.14/libexec/dovecot/imap mail_executable(imap): /usr/local/dovecot-1.1.14/libexec/dovecot/imap mail_executable(pop3): /usr/local/dovecot-1.1.14/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/local/dovecot-1.1.14/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/dovecot-1.1.14/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/dovecot-1.1.14/lib/dovecot/pop3 pop3_reuse_xuidl(default): no pop3_reuse_xuidl(imap): no pop3_reuse_xuidl(pop3): yes pop3_uidl_format(default): %08Xu%08Xv pop3_uidl_format(imap): %08Xu%08Xv pop3_uidl_format(pop3): %v.%u auth default: passdb: driver: shadow args: /etc/shadow passdb: driver: passwd-file args: /etc/passwd userdb: driver: passwd ==== END ====

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[Dovecot] virtual mailbox users users can send, but can't read e-mail
by Ioan Nemes 13 May '09

13 May '09

Greetings, I am trying to add the second virtual mailbox domain (transco.org.au) to an existing Postfix/Dovecot/MySQL mail server. Users of the first virtual mailbox domain (transylvania.org.au) have no problems sending and receiving mail. Users belonging to the second virtual mailbox domain can successfully send mail to outside, however they won't receive the mail, though Postfix delivers the mail to the mail directories. The configuration: --------------------------------------------------------------------------------------- # dovecot --version 1.0.2 --------------------------------------------------------------------------------------- # dovecot -n # 1.0.2: /etc/dovecot.conf base_dir: /var/dovecot/ protocols: imap imaps pop3 pop3s ssl_cert_file: /etc/ssl/dovecotcert.pem disable_plaintext_auth: no login_dir: /var/dovecot/login login_executable(default): /usr/local/libexec/dovecot/imap-login login_executable(imap): /usr/local/libexec/dovecot/imap-login login_executable(pop3): /usr/local/libexec/dovecot/pop3-login login_user: _dovecot first_valid_uid: 5000 last_valid_uid: 5000 mail_location: maildir:/var/spool/vmboxbase/%d/%u mbox_write_locks: fcntl mail_executable(default): /usr/local/libexec/dovecot/imap mail_executable(imap): /usr/local/libexec/dovecot/imap mail_executable(pop3): /usr/local/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/local/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3 imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep imap_client_workarounds(pop3): outlook-idle pop3_uidl_format(default): pop3_uidl_format(imap): pop3_uidl_format(pop3): %08Xu%08Xv pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default: verbose: yes debug: yes debug_passwords: yes passdb: driver: bsdauth passdb: driver: sql args: /etc/dovecot-mysql.conf userdb: driver: passwd userdb: driver: sql args: /etc/dovecot-mysql.conf ---------------------------------------------------------------------------------------------------- password_query = SELECT password FROM users WHERE login = '%u' and active = 'Y' ----------------------------------------------------------------------------------------------------- SELECT password FROM users WHERE login = 'dummy(a)transco.org.au' and active = 'Y'; mysql> SELECT password FROM users WHERE login = 'dummy(a)transco.org.au' and active = 'Y'; +---------------+ | password | +---------------+ | Wdrbd5SLusraw | +---------------+ 1 row in set (0.00 sec) ------------------------------------------------------------------------------------------------------ user_query = SELECT home, maildir, uid, gid FROM users WHERE login = 'dummy' AND active = 'Y' ------------------------------------------------------------------------------------------------------ mysql> SELECT home, maildir, uid, gid FROM users WHERE login = 'dummy(a)transco.org.au'; +----------------------+-----------------------+------+------+ | home | maildir | uid | gid | +----------------------+-----------------------+------+------+ | /var/spool/vmboxbase | transco.org.au/dummy/ | 5000 | 5000 | +----------------------+-----------------------+------+------+ 1 row in set (0.00 sec) # more /etc/dovecot-mysql.conf # This file is opened as root, so it should be owned by root and mode 0600. # # http://wiki.dovecot.org/AuthDatabase/SQL # # For the sql passdb module, you'll need a database with a table that # contains fields for at least the userid and password. If you want to # use the user@domain syntax, you might want to have a separate domain # field as well. # # If your users all have the same uig/gid, and have predictable home # directories, you can use the static userdb module to generate the home # dir based on the userid and domain. In this case, you won't need fields # for home, uid, or gid in the database. # # If you prefer to use the sql userdb module, you'll want to add fields # for home, uid, and gid. Here is an example table: # # CREATE TABLE users ( # userid VARCHAR(128) NOT NULL, # password VARCHAR(64) NOT NULL, # home VARCHAR(255) NOT NULL, # uid INTEGER NOT NULL, # gid INTEGER NOT NULL, # active CHAR(1) DEFAULT 'Y' NOT NULL # ); # Database driver: mysql, pgsql, sqlite #driver = driver = mysql # Database connection string. This is driver-specific setting. # # pgsql: # For available options, see the PostgreSQL documention for the # PQconnectdb function of libpq. # # mysql: # Basic options emulate PostgreSQL option names: # host, port, user, password, dbname # # But also adds some new settings: # client_flags - See MySQL manual # ssl_ca, ssl_ca_path - Set either one or both to enable SSL # ssl_cert, ssl_key - For sending client-side certificates to server # ssl_cipher - Set minimum allowed cipher security (default: HIGH) # # You can connect to UNIX sockets by using host: host=/var/run/mysql.sock # Note that currently you can't use spaces in parameters. # # sqlite: # The path to the database file. # # Examples: # connect = host=192.168.1.1 dbname=users # connect = host=sql.example.com dbname=virtual user=virtual password=blarg # connect = /etc/dovecot/authdb.sqlite # #connect = dbname=virtual user=virtual connect = host=localhost dbname=mail user=dovecot password=dovecot # Default password scheme. # # List of supported schemes is in # http://wiki.dovecot.org/Authentication/PasswordSchemes # #default_pass_scheme = PLAIN-MD5 default_pass_scheme = CRYPT # Query to retrieve the password. # # This query must return only one row with "user" and "password" columns. # The query can also return other fields which have a special meaning, see # http://wiki.dovecot.org/PasswordDatabase/ExtraFields # # The "user" column is needed to make sure the username gets used with exactly # the same casing as it's in the database. Note that if you store username and # domain in separate fields, you most likely want to return a combination of # them as the "user" column, otherwise the domain gets stripped. # # Commonly used available substitutions (see # http://wiki.dovecot.org/Variables for full list): # %u = entire userid # %n = user part of user@domain # %d = domain part of user@domain # # Note that these can be used only as input to SQL query. If the query outputs # any of these substitutions, they're not touched. Otherwise it would be # difficult to have eg. usernames containing '%' characters. # # Example: # password_query = SELECT concat(userid, '@', domain) AS user, password FROM users WHERE userid = '%n' AND domain = '% d' # password_query = SELECT pw AS password FROM users WHERE userid = '%u' AND active = 'Y' # password_query = SELECT password FROM users WHERE login = '%u' and active = 'Y' # Query to retrieve the user information. # # The query must return only one row. Commonly returned columns are: # uid - System UID # gid - System GID # home - Home directory # mail - Mail location # # Either home or mail is required. uid and gid are required. If more than one # row is returned or there are missing fields, the login will fail. For a list # of all fields that can be returned, see # http://wiki.dovecot.org/UserDatabase/ExtraFields # # Examples # user_query = SELECT home, uid, gid FROM users WHERE userid = '%n' AND domain = '%d' # user_query = SELECT dir AS home, user AS uid, group AS gid FROM users where userid = '%u' # user_query = SELECT home, 501 AS uid, 501 AS gid FROM users WHERE userid = '%u' # #user_query = SELECT home, uid, gid FROM users WHERE userid = '%u' user_query = SELECT home, maildir, uid, gid FROM users WHERE login = '%u' AND active = 'Y' # If you wish to avoid two SQL lookups (passdb + userdb), you can use # userdb prefetch instead of userdb sql in dovecot.conf. In that case you'll # also have to return userdb fields in password_query prefixed with "userdb_" # string. For example: #password_query = SELECT userid as user, password, home as userdb_home, uid as userdb_uid, gid as userdb_gid FROM users WHERE userid = '%u' --------------------------------------------------------------------------------------- # ps -aux | grep dovecot root 13442 0.0 0.2 676 952 ?? Ss 4:27AM 0:00.04 /usr/local/sbin/dovecot root 10354 0.0 0.4 816 1920 ?? S 4:27AM 0:00.03 dovecot-auth root 8330 0.0 0.4 708 2080 ?? S 4:27AM 0:00.03 dovecot-auth -w _dovecot 29456 0.0 0.4 664 1876 ?? S 4:27AM 0:00.04 pop3-login _dovecot 12636 0.0 0.4 716 1868 ?? S 4:27AM 0:00.04 pop3-login _dovecot 26625 0.0 0.4 696 1896 ?? S 4:27AM 0:00.04 imap-login _dovecot 4709 0.0 0.4 556 1892 ?? S 4:27AM 0:00.04 imap-login _dovecot 10294 0.0 0.4 760 1888 ?? S 4:27AM 0:00.04 imap-login _dovecot 13526 0.0 0.4 596 1888 ?? S 4:59AM 0:00.01 pop3-login root 20523 0.0 0.1 472 748 p1 S+ 5:01AM 0:00.00 grep dovecot ----------------------------------------------------------------------------------------- # ls -ltr /var/spool/vmboxbase/transco.org.au/dummy/new total 40 -rw------- 1 vmail vmail 462 May 3 11:06 1241312770.V8I6be62M630453.vega.transylvania.org.au -rw------- 1 vmail vmail 708 May 3 11:15 1241313359.V8I6be6bM976701.vega.transylvania.org.au -rw------- 1 vmail vmail 658 May 3 11:21 1241313700.V8I6bd8aM30789.vega.transylvania.org.au -rw------- 1 vmail vmail 672 May 4 02:18 1241367523.V8I6be75M268056.vega.transylvania.org.au -rw------- 1 vmail vmail 706 May 4 02:31 1241368314.V8I6be7cM742941.vega.transylvania.org.au -rw------- 1 vmail vmail 658 May 4 02:54 1241369661.V8I6bd9bM991186.vega.transylvania.org.au -rw------- 1 vmail vmail 690 May 4 03:02 1241370177.V8I6bd98M300668.vega.transylvania.org.au -rw------- 1 vmail vmail 672 May 4 03:54 1241373297.V8I6bda1M149877.vega.transylvania.org.au -rw------- 1 vmail vmail 837 May 4 04:35 1241375739.V8I6bdaeM905070.vega.transylvania.org.au -rw------- 1 vmail vmail 842 May 4 04:36 1241375767.V8I6bdb4M496268.vega.transylvania.org.au ------------------------------------------------------------------------------------------------------------- When I try to retreive mail for user dummy(a)tarnsco.org.au, the folovig entry is created in /var/log/maillog, but no mail is retrived. The mail client agent is Thunderbird 2.0.22 ------------------------------------------------------------------------------------------------------------- May 4 06:04:51 vega dovecot: auth(default): client in: AUTH 1 PLAIN service=POP3 lip=192.168.1.212 rip=192.168.1.101 resp= May 4 06:04:51 vega dovecot: auth(default): client out: CONT 1 May 4 06:04:51 vega dovecot: auth(default): client in: CONT 1 AGR1bW15QHRyYW5zY28ub3JnLmF1AGR1bW15 May 4 06:04:51 vega dovecot: auth(default): bsdauth(dummy(a)transco.org.au,192.168.1.101): lookup May 4 06:04:51 vega dovecot: auth(default): bsdauth(dummy(a)transco.org.au,192.168.1.101): unknown user May 4 06:04:51 vega dovecot: auth-worker(default): sql(dummy(a)transco.org.au,192.168.1.101): query: SELECT password FROM users WHERE login = 'dummy(a)transco.org.au' and active = 'Y' May 4 06:04:51 vega dovecot: auth(default): client out: OK 1 user=dummy(a)transco.org.au May 4 06:04:51 vega dovecot: auth(default): master in: REQUEST 31 29200 1 May 4 06:04:51 vega dovecot: auth(default): passwd(dummy(a)transco.org.au,192.168.1.101): lookup May 4 06:04:51 vega dovecot: auth(default): passwd(dummy(a)transco.org.au,192.168.1.101): unknown user May 4 06:04:51 vega dovecot: auth-worker(default): sql(dummy(a)transco.org.au,192.168.1.101): SELECT home, maildir, uid, gid FROM users WHERE login = 'dummy(a)transco.org.au' AND active = 'Y' May 4 06:04:51 vega dovecot: auth(default): master out: USER 31 dummy(a)transco.org.au home=/var/spool/vmboxbase maildir=transco.org.au/dummy/ uid=5000 gid=5000 May 4 06:04:51 vega dovecot: pop3-login: Login: user=<dummy(a)transco.org.au>, method=PLAIN, rip=192.168.1.101, lip=192.168.1.212 May 4 06:04:51 vega dovecot: POP3(dummy(a)transco.org.au): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0 Any suggestion? Regards, Ioan

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[Dovecot] Only specifying lda in protocols?
by Brandon Lamb 13 May '09

13 May '09

protocols = lda Should this give me fatal errors when trying to do a dovecot -n I get # 1.2.rc3: /etc/dovecot/dovecot.conf Error: Invalid protocols given in configuration file Fatal: Invalid configuration in /etc/dovecot/dovecot.conf Dovecot starts and functions fine though

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