July 2007 - dovecot - dovecot.org

[Dovecot] Permission errors when creating/reading files in users' mail directories
by Bryan Wright 05 Jul '07

05 Jul '07

Hi folks, I'm trying to migrate an old uw-imap server to dovecot, and running into puzzling (to me) permission problems. I've configured mail_location as follows: mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u and each user's mail directory has permissions like this: drwx------ 2 uid gid 4096 Jul 5 09:26 /home/uid/mail But when I try to check a user's mail using an imap client, I see the following error: Jul 5 09:59:49 imap dovecot: IMAP(uid): mkdir_parents(/home/uid/mail/.imap/ INBOX) failed: Permission denied If I open up the permissions so anyone can write, I find that the .imap directory is successfully created, and owned by "uid". Is dovecot initially creating the directory with some other ownership, and then changing the ownership to "uid"? I can get around this problem by setting INDEX in mail_location, and pointing it to a directory with more open permissions, but then I run into the next problem: Jul 5 09:25:49 imap dovecot: IMAP(uid): open() failed with mbox file /var/spool/mail/uid: Permission denied In this case, the permissions are set as follows: -rw------- 1 bkw1a mail 1267 Jul 5 08:47 /var/spool/mail/uid How should the permissions be set on the spool files? Thanks in advance, Bryan -- ======================================================================== Bryan Wright |"If you take cranberries and stew them like Physics Department | applesauce, they taste much more like prunes University of Virginia | than rhubarb does." -- Groucho Charlottesville, VA 22901| (434) 924-7218 | bryan(a)virginia.edu ========================================================================

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[Dovecot] dovecot.conf pop3_uidl_format
by Peter Eriksson 05 Jul '07

05 Jul '07

From the Dovecot 1.0.1 sample dovecot.conf file: # If you want UIDL compatibility with other POP3 servers, use: # UW's ipop3d : %08Xv%08Xu ... # Note that Outlook 2003 seems to have problems with %v.%u format which was # Dovecot's default, so if you're building a new server it would be a good # idea to change this. %08Xu%08Xv should be pretty fail-safe. # # NOTE: Nowadays this is required to be set explicitly, since the old # default was bad but it couldn't be changed without breaking existing # installations. %08Xu%08Xv will be the new default, so use it for new # installations. # pop3_uidl_format = %08Xu%08Xv Notice the *very* small difference in the format between UW's ipop3d and the ones mentioned a little bit below? I think I just got bitten by this (we moved from UW's ipop3d to Dovecot). Loooots of users just got a lot of new (old) mail again ("Leave mail on server" is a popular setting). Ah well. They really should move to IMAP anyway and now they got some summer reading to do :-) Is the difference intentional? If so then perhaps this should be more clearly pointed out! - Peter

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[Dovecot] dotlock O_EXCL query
by derek kit hoong foo 05 Jul '07

05 Jul '07

Hi there, I was wondering if someone can assist with clarifying why O_EXCL does not always work with NFS. Is it related to NFS protocol version support or export permissions mode out of the Celerra/Netapp ( e.g: mixed mode, unix file permissions ? ) Please advise. Thanks. Regards, new dovecot user.

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[Dovecot] MailMan option
by Sergey A. Kobzar 05 Jul '07

05 Jul '07

Hi guys, Is it possible receive my own posts to the list? I have configured such option "Receive your own posts to the list? - Yes" on Mailman page but it still does not work. Any ideas? -- Sergey

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[Dovecot] problem with quota
by juan carlos 04 Jul '07

04 Jul '07

hi everyone I have dovecot 1.0.rc15-2, postfix 2.3.8 and virtual users and domains installed in debian sarge, the users quota are not working. I have applied the pacth VDA and didn't work, if a I sent a mail to another user which exceeds his quota this user can receive the mail without problem, this said to me that the quota doesn't work. I use maildir in mi configuration. Please help me with this problem.

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[Dovecot] PAM timed out, kill failed, auth SEGV
by Thomas Arnett 04 Jul '07

04 Jul '07

My log is full of blocks like this: auth(default): pam(?): PAM child process 13576 timed out, killing it auth(default): PAM: kill(13576) failed: No such process Often, this is recorded for several pids at once. Occasionally, there's a single burst when a virtual user logs in, immediately before pam_authenticate() fails and checkpassword is executed. When this happens, pam() contains the username and remote IP. Usually, it starts 2 minutes after a login attempt (successful or not) and repeats every 10 seconds indefinitely. pam() contains something else: ~87% ? ~ 9% [garbage],master ~ 4% ?,master < 1% [empty] [garbage] varies; it seems to be constant for an instance of auth, but I haven't verified this. Eventually, auth segfaults: Core was generated by `dovecot-auth'. Program terminated with signal 11, Segmentation fault. ... #0 0x08087a68 in str_sanitize_append (dest=0x80a8950, src=0x3d9 <Address 0x3d9 out of bounds>, max_len=64) at str-sanitize.c:11 p = 0x3d9 <Address 0x3d9 out of bounds> #1 0x08057a1d in get_log_str (auth_request=0x80c6a00, subsystem=0x808f7cd "pam", format=0x808f9ac "PAM child process %s timed out, killing it", va=0x597f8c5c ":\211\n\b?|\t\b?|\t\b?\214\177Y") at auth-request.c:1121 ip = 0xa <Address 0xa out of bounds> str = (string_t *) 0x80a8950 #2 0x08057c62 in auth_request_log_error (auth_request=0x80c6a00, subsystem=0x808f7cd "pam", format=0x808f9ac "PAM child process %s timed out, killing it") at auth-request.c:1177 va = 0x597f8c5c ":\211\n\b?|\t\b?|\t\b?\214\177Y" #3 0x080658ee in pam_child_timeout (context=0x0) at passdb-pam.c:537 request = (struct pam_auth_request *) 0x80c6de8 iter = (struct hash_iterate_context *) 0x80bcdb0 key = (void *) 0xa9e value = (void *) 0x80c6de8 timeout = 1182548633 #4 0x08079fc5 in io_loop_handle_timeouts (ioloop=0x80b09b0, update_run_now=true) at ioloop.c:294 t = (struct timeout *) 0x80b4ca8 called_timeouts = (struct timeout *) 0x80b4ca8 tv = {tv_sec = 0, tv_usec = 0} t_id = 2 #5 0x0807b32e in io_loop_handler_run (ioloop=0x80b09b0) at ioloop- epoll.c:175 ctx = (struct ioloop_handler_context *) 0x80b09d8 events = (struct epoll_event *) 0x80b0a18 event = (const struct epoll_event *) 0x80b0a18 list = (struct io_list *) 0x80c42d8 io = (struct io *) 0x0 tv = {tv_sec = 1, tv_usec = 180418} events_count = 12 t_id = 2 msecs = 1181 ret = 0 i = 1 j = 3 call = true #6 0x0807a0a8 in io_loop_run (ioloop=0x80b09b0) at ioloop.c:329 No locals. #7 0x0805d7ee in main (argc=1, argv=0x597f8ec4) at main.c:321 foreground = false My config (Gentoo Linux hardened/x86/2.6): # 1.0.1: /etc/dovecot/dovecot.conf listen: [::1] ssl_listen: [::] ssl_cert_file: /etc/ssl/misfeature.net/crt ssl_key_file: /etc/ssl/misfeature.net/key ssl_cipher_list: HIGH login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/imap-login login_greeting_capability: yes verbose_proctitle: yes first_valid_uid: 1000 first_valid_gid: 100 mail_location: maildir:~/mail mail_debug: yes maildir_copy_with_hardlinks: yes mail_drop_priv_before_exec: yes imap_client_workarounds: delay-newmail outlook-idle auth default: verbose: yes debug: yes passdb: driver: pam args: * passdb: driver: checkpassword args: /usr/local/bin/checkpassword userdb: driver: passwd userdb: driver: prefetch socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix I turned on the various logging options while investigating this problem; the messages appear even without. -- TA

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[Dovecot] Maildir configuration vs ZFS and snapshots...
by Peter Eriksson 04 Jul '07

04 Jul '07

I have a little tricky issue around here. First some background: Every user is assigned their own ZFS filesystem, and it's mounted as /home/USER with a Maildir inside it. The there is a filesystem snapshot (read-only) taken automatically every day by the system. The idea is to allow users easy access to backup copies of their mail so that they can restore things themself.. For example this structure (somewhat abbreviated, some files/dirs removed): /home/testson/ .zfs/ snapshot/ 2007-06-18/ Maildir/ cur/ new/ tmp/ .Trash/ cur/ new/ tmp/ Maildir/ cur/ new/ tmp/ .Trash/ cur/ new/ tmp/ Now,I can access the normal Maildir INBOX and folders nicely via Dovecot/IMAP. The thing is I'd like to be able to access the snapshot too via Dovecot/IMAP somehow. My first idea was to use Dovecots namespace feature like this in the config file: namespace private { separator = / prefix = snapshot/ location = maildir:~/.zfs/snapshot/2007-06-18/Maildir:CONTROL=~/.dovecot/control:INDEX=~/.dovecot/index } This works great for the mail folders inside the Maildir - but not for the INBOX which isn't displayed at all... (Ie, under the "snapshot" prefix I only see "Trash" etc when looking at the folder from an IMAP client). I think that I'd need to use the "INBOX=" option for Dovecot to see the top-level "new/cur/tmp" directories in the snapshot folder, but you can only have one INBOX if I'm not mistaken? Any suggestions on how best to configure this? - Peter

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[Dovecot] multiple userdb/passdb
by Thomas Balsfulland 04 Jul '07

04 Jul '07

hi all, i am using debian etch with dovecot imap (version 1.0.rc15-2) and mysql-database for the virtual mailuser. all informations (username, password, mailbox format, mailbox location, quota) are find in the sql. the maildir are locates at /home/vmail/, every is working fine. now i want to use imap for the system user as well - at the moment they cant user imap because they are not find in the sql db. so i set a second userdb/passwd in the dovecot.conf for the local system-user. now the config says: auth default { passdb passwd-file { args = /etc/dovecot/localuser } passdb sql { args = /etc/dovecot/dovecot-sql.conf } userdb passwd-file { args = /etc/dovecot/localuser } userdb sql { args = /etc/dovecot/dovecot-sql.conf } } and /etc/dovecot/localuser looks: localuser1:password:1000:1000::/home/localuser1::userdb_mail=mbox:~/Mail:INBOX=~/Mail/incoming now the local user is able to authenticate, but cant acces his mailboxes the logfile says: host dovecot: imap-login: Login: user=<localuser1>,method=PLAIN, rip=195.xxx.xxx.xxx, lip=193.yyy.yyy.yyy, TLS host dovecot: IMAP(tbals): lstat(/home/vmail//localuser1/cur) failed: Permission denied host dovecot: IMAP(tbals): lstat(/home/vmail/shared) failed: Permission denied it seems dovevot ignore the settings in /etc/dovecot/localuser. could someone help? regards thomas -- thomas balsfulland tbals(a)ctrl-c.de zwischen mut und dummheit liegt nur ein grat der sich durch das vorbereitetsein unterscheidet

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[Dovecot] OT - Claws Mail on Mac OS X
by Gerard 04 Jul '07

04 Jul '07

Someone on this list recently asked regarding the availability of Claws Mail on Mac OS X architecture, A BETA release has just been issued. http://damien.krotkine.com/claws/ -- Gerard

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[Dovecot] convert plugin: endless conversion and duplicate messages
by Andrew Ziem 03 Jul '07

03 Jul '07

Hi, When an mbox has a filename with a period, the Dovecot 1.0.1 convert plugin will endlessly convert the same mbox causing duplicate messages. To reproduce, create try converting two mboxes: one with a valid name and another with an invalid name. Then, repeat the login procedure a few times. Dovecot should do something more graceful such as replacing periods with another character. Here's /var/log/mail/errors Jul 2 08:29:44 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:39:46 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:48:54 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:48:58 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:49:39 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:59:40 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 09:09:40 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 09:20:23 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name I didn't test other non-{alphanumeric,whitespace} characters. Other than this and my previous e-mails, our conversion from UW-IMAP mboxes went nicely. I notice the performance difference, and our users will be happy to finally have proper subfolders. Andrew

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