January 2010 - dovecot

[Dovecot] Upgrade path questions
by Thomas M Goerger 18 Jan '10

18 Jan '10

Hi, We are currently running Dovecot v1.1.6 on our servers, and are contemplating an upgrade to 1.2, or 2.0 soon. We are wondering how many organizations are still running a 1.1 version of Dovecot, and if anyone has any thoughts on this transition. Have you upgraded from 1.1 to 1.2? What are your experiences with this? Have you upgraded from 1.1 to 2.0 directly? What are your experiences this way? We are also running an environment with both mbox and maildir formats. How many of you are running similarly, or are running solely maildir or mbox? We're just looking to gather information going forward, and anything you might be able to contribute would be very helpful. Thanks! ************************************************************************* * Tom Goerger - Email/Unix System Administrator * * * * University of Minnesota Email: tmg(a)umn.edu * * Operations, Infrastructure and Architecture Phone: 4-5804 * * Internet Services Office: 626J WBOB * * * *************************************************************************

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[Dovecot] Inotify instance limit for user exceeded
by Lampa 18 Jan '10

18 Jan '10

Hello, i saw in my log followed messages: dovecot: 2010-01-18 13:20:54 Warning: IMAP(user1(a)domain1.com): Inotify instance limit for user exceeded, disabling. dovecot: 2010-01-18 13:21:01 Warning: IMAP(user2(a)domain2.com): Inotify instance limit for user exceeded, disabling. dovecot: 2010-01-18 13:21:23 Warning: IMAP(user2(a)domain2.com: Inotify instance limit for user exceeded, disabling. dovecot -c dovecot-domain1.com.conf -n: # 1.0.10: dovecot-domain1.com.conf remax-czech.cz base_dir: /var/run/domain1.com log_path: /var/log/dovecot/domain1.com/dovecot.log info_log_path: /var/log/dovecot/domain1.com/info.log log_timestamp: %F %T protocols: imap imaps pop3 pop3s listen: 127.0.0.1 ssl_cert_file: /usr/local/ssl/mail/domain1.comserver.crt ssl_key_file: /usr/local/ssl/mail/domain1.com/server.key disable_plaintext_auth: no verbose_ssl: yes login_dir: /var/run/dovecot-domain1.com/login login_executable(default): /usr/local/dovecot/bin/dovecot/imap-login login_executable(imap): /usr/local/dovecot/bin/dovecot/imap-login login_executable(pop3): /usr/local/dovecot/bin/dovecot/pop3-login login_max_processes_count: 40 login_max_connections: 42 max_mail_processes: 2000 verbose_proctitle: yes first_valid_uid: 507 last_valid_uid: 507 first_valid_gid: 502 last_valid_gid: 502 fsync_disable: yes mail_executable(default): /usr/local/dovecot/bin/dovecot/imap mail_executable(imap): /usr/local/dovecot/bin/dovecot/imap mail_executable(pop3): /usr/local/dovecot/bin/dovecot/pop3 mail_process_size: 300 mail_plugin_dir(default): /usr/local/dovecot-1.0.10/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/dovecot-1.0.10/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/dovecot-1.0.10/lib/dovecot/pop3 pop3_uidl_format(default): pop3_uidl_format(imap): pop3_uidl_format(pop3): %08Xu%08Xv auth default: mechanisms: plain login user: vmail verbose: yes passdb: driver: vpopmail userdb: driver: vpopmail There is about 2500 users on domain1.com, so i should raise max_mail_processes ? -- Lampa

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[Dovecot] unlinking
by David Halik 18 Jan '10

18 Jan '10

Quick question. How important are these? Are the errors recoverable and not a big deal, or are they actually a problem? I see a few of these randomly over the course of the day. Jan 15 10:04:04 gehenna13.rutgers.edu dovecot: IMAP(user): unlink(/rci/nqu/rci/u8/user/dovecot/.such and such maildir/.nfs00000000001e951000002b8d) failed: Device or resource busy Jan 15 10:04:04 gehenna13.rutgers.edu dovecot: IMAP(user): unlink(/rci/nqu/rci/u8/user/dovecot/.such and such maildir/.nfs00000000001e951000002b8d) failed: Device or resource busy Jan 15 10:04:04 gehenna13.rutgers.edu dovecot: IMAP(user): unlink_directory(/rci/nqu/rci/u8/user/dovecot/.such and such maildir) failed: Device or resource busy Jan 15 10:04:04 gehenna13.rutgers.edu dovecot: IMAP(user): unlink_directory(/rci/nqu/rci/u8/user/dovecot/.such and such maildir) failed: Device or resource busy -- ================================ David Halik System Administrator OIT-CSS Rutgers University dhalik(a)jla.rutgers.edu ================================

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[Dovecot] Strange permission problem with Maildir
by tkin1t3asy 18 Jan '10

18 Jan '10

I have this very strange problem with Dovecot spitting out a file permissions error but further testing seems to show it being an inaccurate message. POP3(username): maildir: data ~/Maildir POP3(username): maildir++: root =/home/ssb201/Maildir, index=, control=, inbox=/home/ssb201/Maildir POP3(username): stat(/home/username/Maildir/tmp) failed: Permission denied (euid=500(username) egid=500(username) missing +x perm: /home/username/Maildir) POP3(username): Couldn't open INBOX... as you can see below the permissions are correct: root@host:/home/username# ls -al Maildir/ total 744 drwx------ 8 username username 220 2010-01-13 06:27 . drwxr-xr-x 18 username username 80 2010-01-13 06:14 .. drwx------ 2 username username 108480 2010-01-14 20:56 cur -rw------- 1 username username 65272 2010-01-14 20:56 dovecot.index -rw------- 1 username username 382976 2010-01-14 20:56 dovecot.index.cache -rw------- 1 username username 6836 2010-01-14 20:56 dovecot.index.log -rw------- 1 username username 309472 2010-01-14 20:56 dovecot-uidlist -rw------- 1 username username 8 2010-01-14 20:56 dovecot-uidvalidity -rw------- 1 username username 0 2010-01-14 20:56 dovecot-uidvalidity.4a090e80 drwx------ 2 username username 40 2010-01-14 20:56 new drwx------ 2 username username 40 2010-01-14 20:56 tmp if I rename ~/Maildir to ~/Maildir.orig and let dovecot create a new directory it works fine with no errors. root@host:/home/username# ls -al Maildir total 28 drwx------ 5 username username 220 2010-01-14 21:19 . drwxr-xr-x 19 username username 100 2010-01-14 21:19 .. drwx------ 2 username username 40 2010-01-14 21:19 cur -rw------- 1 username username 16384 2010-01-14 21:19 dovecot.index.cache -rw------- 1 username username 468 2010-01-14 21:19 dovecot.index.log -rw------- 1 username username 70 2010-01-14 21:19 dovecot-uidlist -rw------- 1 username username 8 2010-01-14 21:19 dovecot-uidvalidity -rw------- 1 username username 0 2010-01-14 21:19 dovecot-uidvalidity.4b4f8a6e drwx------ 2 username username 60 2010-01-14 21:19 new drwx------ 2 username username 40 2010-01-14 21:19 tmp If I rename the newly created ~/Maildir to ~/Maildir.new, and rename ~/Maildir.orig to ~/Maildir the original directory works now with no "+x perm" error. This would seem to imply that dovecot is modifying something, somewhere else on the system when it creates the mail directory. What could this be? -- View this message in context: http://old.nabble.com/Strange-permission-problem-with-Maildir-tp27168284p27… Sent from the Dovecot mailing list archive at Nabble.com.

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[Dovecot] how-to use dsync to do a 2 ways replication ?
by Eric Belhomme 18 Jan '10

18 Jan '10

Hi, I want to set-up two dovecot imap servers, with active-active replicated maildirs. The goal is to have a hosted public server on Internet, and a private server on my LAN to speed-up local connections. So I compiled dovecot 2.0 beta 1 in order to use dsync utility... Actually my config is pretty simple as I just want to setup a proof of concept before going ahead in this way : (Both servers are Debian Lenny with excatly the same config) mail0:~# /usr/local/dovecot2/sbin/dovecot -n # 2.0.beta1: /etc/dovecot2/dovecot/dovecot.conf # OS: Linux 2.6.26-2-686 i686 Debian 5.0.3 auth_debug = yes auth_verbose = yes login_trusted_networks = 172.16.64.0/18 mail_location = maildir:%h passdb { args = /etc/dovecot/userpasswd deny = no driver = passwd-file } postmaster_address = postmaster(a)example.com service pop3-login { inet_listener { port = 110 } inet_listener { port = 995 ssl = yes } } service imap-login { inet_listener { port = 143 } inet_listener { port = 993 ssl = yes } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = prefetch } userdb { args = /etc/dovecot/userpasswd driver = passwd-file } I logged on the first server with an IMAP client then I copied many email through IMAP, then I launched dsync as root : /usr/local/dovecot2/bin/dsync -v mirror 'ssh eole.it.fr.eve /usr/local/dovecot2/bin/dsync' root(a)eole.it.fr.eve's password: dsync-local(root): Error: Can't create mailbox ssh: Mailbox already exists dsync-local(root): Error: Can't create mailbox aptitude: Mailbox already exists dsync-local(root): Error: Can't create mailbox debtags: Mailbox already exists dsync-local(root): Info: debtags: only in source dsync-local(root): Info: aptitude: only in source dsync-local(root): Info: ssh: only in source dsync-local(root): Info: ssh: only in dest dsync-local(root): Info: aptitude: only in dest dsync-local(root): Info: debtags: only in dest dsync-local(root): Error: Mailbox ssh changed its GUID (cdfc9a2d85154e4b47180000b31a5865 -> 541e9f2850234e4b3a2b0000d0cf7273) dsync-local(root): Error: msg iteration failed: Couldn't open mailbox dsync-remote(root): Error: Can't create mailbox debtags: Mailbox already exists dsync-remote(root): Error: Can't create mailbox aptitude: Mailbox already exists dsync-remote(root): Error: Can't create mailbox ssh: Mailbox already exists dsync-remote(root): Error: Mailbox debtags changed its GUID (501e9f2850234e4b3a2b0000d0cf7273 -> d1fc9a2d85154e4b47180000b31a5865) dsync-remote(root): Error: msg iteration failed: Couldn't open mailbox dsync-remote(root): Error: command MSG-LIST failed dsync-local(root): Error: Mailbox ssh changed its GUID (cdfc9a2d85154e4b47180000b31a5865 -> 541e9f2850234e4b3a2b0000d0cf7273) dsync-local(root): Error: Mailbox aptitude changed its GUID (cffc9a2d85154e4b47180000b31a5865 -> 521e9f2850234e4b3a2b0000d0cf7273) dsync-local(root): Error: Mailbox debtags changed its GUID (d1fc9a2d85154e4b47180000b31a5865 -> 501e9f2850234e4b3a2b0000d0cf7273) dsync-local(root): Error: Mailbox ssh changed its GUID (cdfc9a2d85154e4b47180000b31a5865 -> 541e9f2850234e4b3a2b0000d0cf7273) dsync-local(root): Error: Mailbox aptitude changed its GUID (cffc9a2d85154e4b47180000b31a5865 -> 521e9f2850234e4b3a2b0000d0cf7273) dsync-local(root): Error: Mailbox debtags changed its GUID (d1fc9a2d85154e4b47180000b31a5865 -> 501e9f2850234e4b3a2b0000d0cf7273) mail0:~# dsync-remote(root): Error: Mailbox debtags changed its GUID (501e9f2850234e4b3a2b0000d0cf7273 -> d1fc9a2d85154e4b47180000b31a5865) dsync-remote(root): Error: Mailbox aptitude changed its GUID (521e9f2850234e4b3a2b0000d0cf7273 -> cffc9a2d85154e4b47180000b31a5865) dsync-remote(root): Error: Mailbox ssh changed its GUID (541e9f2850234e4b3a2b0000d0cf7273 -> cdfc9a2d85154e4b47180000b31a5865) dsync-remote(root): Error: Mailbox debtags changed its GUID (501e9f2850234e4b3a2b0000d0cf7273 -> d1fc9a2d85154e4b47180000b31a5865) dsync-remote(root): Error: Mailbox aptitude changed its GUID (521e9f2850234e4b3a2b0000d0cf7273 -> cffc9a2d85154e4b47180000b31a5865) dsync-remote(root): Error: Mailbox ssh changed its GUID (541e9f2850234e4b3a2b0000d0cf7273 -> cdfc9a2d85154e4b47180000b31a5865) It seems dsync tries to use my system user database instead of the /etc/dovecot/userpasswd file ! I found dsync doc on the wiki at http://wiki2.dovecot.org/Tools/dsync but this is not really clear for me... So maybe someone can tell me what's wrong ? Regards, -- Eric Belhomme

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[Dovecot] Adding support for a new storage format - plugin?
by Brad Hards 18 Jan '10

18 Jan '10

Hi, I've spent a little bit of time looking at the dovecot source (from the unstable 2.0 development tree), and I think I'm starting to get it together... Background: I'm interested in dovecot to provide IMAP access to an existing database backed server store (http://www.openchange.org for more details). The goal is to provide parallel access using either IMAP or the exchange RPC protocol. If I understand this stuff: * I can potentially provide access to the store using a plugin. It looks like the virtual mailbox plugin is a potential example here. * I may need to also provide an authentication plugin (not sure whether I can just re-use the existing ldap backend - quite possibly a useful option in my scenario) * I probably can't use the existing SQL code, since it uses its own schema. * I may need to provide some locking to ensure things are always in a consistent state for both IMAP and exchange RPC. Comments? Suggestions? Brad

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[Dovecot] listen to imap*s* on multiple ports?
by Frank Cusack 17 Jan '10

17 Jan '10

<http://wiki.dovecot.org/QuestionsAndAnswers#Is_it_possible_to_have_Dovecot_…> is out of date. How can I listen to ssl-wrapped IMAP on multiple ports? I need to listen on both 993 (for some stupid clients I have to support that can't do START TLS) and 80 (to get past L3/L4 firewalls). I'd like to do it in dovecot rather than use nc, ipfilter or whatever. -frank

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[Dovecot] handling filename of compressed messages
by Leonardo Rodrigues 17 Jan '10

17 Jan '10

i'm running dovecot 1.2.9 and, among other things, i have the zlib plugin enabled. A shell script runs once a day to compresses all not still compressed files on the users maildirs. so far so good, it works fine, there's no problem on that. what i think is not happening 100% correctly is the following: 1) user receives a message 2) BEFORE the compress routine runs, filename is: new/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207 3) AFTER the compress routine, filename is now: new/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207.gz 4) user check his mail .... and now the filename is cur/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207.gz:2,S 5) user replies that mail .... and now the filename is cur/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207.gz:2,RS i'm aware that dovecot doesnt need the '.gz' extension on the file to recognize that as a gzipped file. Even without the .gz extension, dovecot is correctly reading the file. the '.gz' is not even necessary on the filename and still dovecot can handle it fine. anyway, i would like to suggest dovecot to handle the filename to keep the .gz extension, if that exists. This could help sysadmins to easily identify gzipped files on the maildirs and make anything with them, if that's desired. i would like to see dovecot changing filenames properly and keeping the .gz extension always, for example cur/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207:2,S.gz instead of cur/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207.gz:2,S cur/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207:2,RS.gz instead of cur/1263436052.V6814I43300b4M146002.correio.domain.com.br,S=238207.gz:2,RS -- Atenciosamente / Sincerily, Leonardo Rodrigues Solutti Tecnologia http://www.solutti.com.br Minha armadilha de SPAM, NÃO mandem email gertrudes(a)solutti.com.br My SPAMTRAP, do not email it

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[Dovecot] sieve: failed to save binary
by wenjie zheng 15 Jan '10

15 Jan '10

RHEL 5.3 Dovecot 2.0 beta1 dovecot-sieve (updated 1 week ago, changeset a3eb0b0b2ddf) Jan 15 11:30:06 mail4a dovecot: lmtp(31015, testmail4a2(a)dev.p4nt5.com) sieve: using sieve path for user's script: /data/mail/de/ dev.p4nt5.com/te/testmail4a2/.dovecot.sieve Jan 15 11:30:06 mail4a dovecot: lmtp(31015, testmail4a2(a)dev.p4nt5.com) sieve: executed before user's script(1): /etc/dovecot/dovecot-global-sieve.sieve Jan 15 11:30:06 mail4a dovecot: lmtp(31015, testmail4a2(a)dev.p4nt5.com) afEDDB6mUEsneQAA0TR52A: sieve: failed to save binary: open(/etc/dovecot/dovecot-global-sieve.svbinmail4a.31015.) failed: Permission denied (euid=5000(virtual) egid=5000(virtual) missing +w perm: /etc/dovecot) It seems that Dovecot wants to save it as something specific with a different name. Even running sievec manually does not make it work. Thanks, Wenjie

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[Dovecot] Moving
by Timo Sirainen 15 Jan '10

15 Jan '10

I'm moving back to Finland tomorrow. It's probably going to take a week or so until things settle down and I'm again back to coding.

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