January 2009 - dovecot

[Dovecot] Confused about permissions needed for shared mailbox
by Thomas Hummel 28 Jan '09

28 Jan '09

Hello, let me re-state, hopefully in clearer terms, what I tried to described in a previous thread : With dovecot-1.1.8/Maildir/LDAP pass/userdb (prefetch), I'm trying to set up a Maildir ".box" shared in rw between 2 users in a "Public" namespace. I can't get it to work unless I chmod 777 everything, which obiously is not what I want. 1) am I correct thinking that the system_user userdb extra_field and unix permissions should be enough to achieve that and that ACLs is only if I want to fine tunes mailbox permissions ? 2) let's say that my public namespace prefix is Public/, that the .box/ maildir is in /path/to/public/.box and my 2 users belong to the doveshared unix group. I thought it would be enough to have drwxrws--- 3 root doveshared 4096 Jan 28 14:55 public drwxrws--- 3 root doveshared 4096 Jan 28 14:55 public/.box -rwxrws--- 1 root doveshared 0 Jan 26 18:25 public/.box/dovecot-shared provided that my prefetch userdb returns system_user, as I think the following says in dovecot-ldap.conf : pass_attrs = uid=user,userPassword=password,homeDirectory=userdb_home,,,uidNumber=userdb_uid,gidNumber=userdb_gid,shadowMax=userdb_system_user and providedt that in LDAP shadowMax: 80 (whatever value). But this doesn't seem to work. By the way : Am I supposed to have a dovecot-shared file in public as well (that is not only in public/.box) ? 3) let's say I try ACLs with the same setup (anyone <all permissions> for starters) would pass_attrs = uid=user,userPassword=password,homeDirectory=userdb_home,,,uidNumber=userdb_uid,gidNumber=userdb_gid,shadowMax=userdb_system_user.title=userdb_acl_groups and title: group1,doveshared be a correct setup ? Do I need an dovecot-acl file only in .box or in public too ? My understanding is that my setup doesn't work because for some reason, dovecot doesn't see my users secondary groups or doesnt take them into account... Any thoughts which might help ? -- Thomas Hummel | Institut Pasteur <hummel(a)pasteur.fr> | Pôle informatique - systèmes et réseau

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[Dovecot] Symlink shared mailboxes and system_user extra field
by Thomas Hummel 28 Jan '09

28 Jan '09

Hello, I'm trying to set up, as explained in the wiki, shared mailboxes with symlink. I'm running dovecot-1.1.8 with LDAP pass/userdb. The Maildir layout goes like this : /courriel/boites/foobar : Maildir of user foobar (nfs) /courriel/meta/foobar : control files of user foobar (nfs) /var/dovecot/indexes : indexes (locally stored) I created : /courriel/boites/doveshared/.box/ : the Maildir I want to share /courriel/boites/foobar/.box -> /courriel/boites/doveshared/.box (symlink) /courriel/boites/foobaz/.box -> /courriel/boites/doveshared/.box (symlink) the unix and LDAP group doveshared, so /etc/group holds : doveshared:*:<gid>:foobar,foobaz the permissions on the real Maildir are ok for that group : drwxrwx--- 3 root doveshared 4096 Jan 26 18:58 /courriel/boites/doveshared drwxrwx--- 5 root doveshared 4096 Jan 26 18:58 .box (in /courriel/boites) I made the userdb (prefetch) return the system_user extra_field (for now, I'm using an used LDAP attribute - I will create a new attribute in my schema later) : pass_attrs = uid=user,userPassword=password,homeDirectory=userdb_home,,,uidNumber=userdb_uid,gidNumber=userdb_gid,shadowMax=userdb_system_user and it seems to be actually returned : Jan 27 09:34:10 munster3 dovecot: auth(default): ldap(foobar,157.99.64.42): result: uid(user)=foobar uidNumber(userdb_uid)=xxx gidNumber(userdb_gid)=xxx homeDirectory(userdb_home)=/home1/xxx/foobar userPassword(password)=<hidden> shadowMax(userdb_system_user)=380 But I can't subscribe to the mailbox : stat(/courriel/boites/doveshared/.box/tmp) failed: Permission denied (euid=xxx egid=<primary gid>) as a matter of fact, the egid seems to be the primary gid. What am I missing ? Thanks. -- Thomas Hummel | Institut Pasteur <hummel(a)pasteur.fr> | Pôle informatique - systèmes et réseau

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[Dovecot] (imap) killed with signal 9 on Linux/OpenVZ VPS
by Adam Flott 28 Jan '09

28 Jan '09

I'm trying to get dovecot running on my VPS and the main imap process is receiving a SIGKILL from what I presume to be the Linux Kernel and/or OpenVZ. This happens after I login and my client(s) just sit their idling. The mailbox is empty. I'm not running out of memory. stracing the process doesn't show anything interesting... ... gettimeofday({1233024777, 844804}, {420, 0}) = 0 gettimeofday({1233024777, 844912}, NULL) = 0 poll([{fd=4, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=2, events=POLLERR|POLLHUP|POLLNVAL}, {fd=0, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}], 3, 10000) = -1 EINTR (Interrupted system call) +++ killed by SIGKILL +++ This is on a CentOS 5.2 VPS. I haven't changed much other than installing a few packages. I've also had this exact same problem on Debian 4.0 VPS (OpenVZ) under the same machine. Turning off SSL and logging in plain old IMAP didn't change anything. Under the Debian installation I tried the latest version of dovecot (1.1.8 or so), different I/O loop methods, turning them off, on, etc. The only other reference via Google I can find to this sort of problem is: http://www.dovecot.org/list/dovecot/2007-December/027440.html But that was with the login process, whereas mine is with the imap daemon. Any help is greatly appreciated. Adam # uname -a Linux npjh.com 2.6.18-ovz028stab039.1-smp #1 SMP Tue Jul 24 12:12:48 MSD 2007 i686 i686 i386 GNU/Linux # dovecot -n # 1.0.7: /etc/dovecot.conf log_path: /var/log/dovecot.log info_log_path: /var/log/dovecot-info.log protocols: imaps ssl_cert_file: /etc/ssl/certs/mail.pem ssl_key_file: /etc/ssl/private/mail.key disable_plaintext_auth: yes login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/imap-login login_processes_count: 2 mail_location: maildir:~/Maildir maildir_copy_with_hardlinks: yes namespace: type: private separator: . prefix: INBOX. inbox: yes auth default: mechanisms: digest-md5 cram-md5 login plain passdb: driver: passwd-file args: /etc/dovecot/passwd userdb: driver: static args: uid=vmail gid=vmail home=/home/vmail/%u socket: type: listen client: path: /var/run/dovecot/auth-client mode: 432 user: postfix group: postfix # free total used free shared buffers cached Mem: 256000 75100 180900 0 0 0 -/+ buffers/cache: 75100 180900 Swap: 0 0 0

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[Dovecot] Unknown dict module: db with expire plugin
by Nicolas Letellier 28 Jan '09

28 Jan '09

Hello. I use dovecot 1.1.8 in a FreeBSD 6.3 Today, I want to active expire plugin. But it does not work. I made instructions described in http://wiki.dovecot.org/Plugins/Expire for a bdb database. See my dovecot -n: # 1.1.8: /usr/local/etc/dovecot.conf # OS: FreeBSD 6.3-RELEASE-p4 i386 ufs syslog_facility: local6 ssl_cert_file: /etc/ssl/mail/***********.cert ssl_key_file: /etc/ssl/mail/********************.key disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login login_user: dovecot-auth login_greeting: ************************** login_processes_count: 2 verbose_proctitle: yes first_valid_uid: 143 last_valid_uid: 143 first_valid_gid: 143 last_valid_gid: 143 mail_access_groups: mail mail_location: maildir:/var/mail/vmail/%u/ mail_plugins: quota imap_quota mail_log expire imap_client_workarounds: delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep auth default: mechanisms: plain login passdb: driver: sql args: /usr/local/etc/dovecot/dovecot-sql.conf userdb: driver: sql args: /usr/local/etc/dovecot/dovecot-sql.conf socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix master: path: /var/run/dovecot/auth-master mode: 432 user: dovecot group: mail plugin: quota: maildir quota_rule: *:storage=1000M quota_rule2: Trash:storage=50M quota_warning: storage=80%% /usr/home/scripts/mail_quota-warning.sh 80 quota_warning2: storage=90%% /usr/home/scripts/mail_quota-warning.sh 90 quota_warning3: storage=95%% /usr/home/scripts/mail_quota-warning.sh 95 sieve: /var/mail/vmail/%u/sieve expire: Trash 7 Trash/* 7 Junk 2 expire_dict: proxy::expire dict: expire: db:/var/lib/dovecot/expire.db The /var/lib/dovecot/expire.db file is not automatically created. So I created it, with root rights. After, the file is always to 0 bytes. When I want to dovecot --exec-mail ext /usr/local/libexec/dovecot/expire-tool --test I have this: Error: read(/var/run/dovecot/dict-server) failed: Remote disconnected And in my logs: Jan 28 09:24:36 ******** dovecot: dict: Unknown dict module: db Jan 28 09:24:36 ******** dovecot: dict: Failed to initialize dictionary 'expire' I do not understand the problem. I made instructions on the wiki page. Is anybody could help me to resolve this? Thanks. Regards, (ps : another question : what's the advantage of expire plugin with a manual cron job?) -- -Nicolas.

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[Dovecot] Old Thunderbird problem - need a fix
by Marc Perkel 28 Jan '09

28 Jan '09

I've been having a Dovecot/Thunderbird problem for about a year now and I need a fix. When I restart dovecot everything is fine but as the day progresses thing start deteriorating. When I empty my trash folder it doesn't empty. I get an indication that email has arrived in my inbox by the unread message count but can't access it. Messages arrive by appear to be empty. Folders that should be empty still have message counts showing. With all of the above problems - restarting dovecot make them all go away. I am doing something unusual in that I use Exim to directly deliver (maildir) to the inbox and other folders. And I have processes that take email out of certain folders (spam learning). Whatever the problem is I think that when I restart Dovecot I'm forcing Thunderbird to reconnect. Perhaps the solution is to somehow force Thunderbird to have to reconnect every time rather than have a persistent connection? Looking for suggestions. Thanks in advance.

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[Dovecot] Store sent email
by pierre.casenove＠almerys.com 28 Jan '09

28 Jan '09

Hello all, I've set up a webmail solution based on RedHat EL 5, sendmail, spamassassin, clamAV and dovecot by following this tutorial: http://www.redhat.com/magazine/025nov06/features/email/index.html I have configured everything without any problem, I can send and receive emails, using Maildir store format. Now, what I don't know how to set up: I would like to store the emails sent by the users in a dedicated store (Like Sent Emails in many webmails).... and I've got no idea on how to do this! By googling a little, I found this thread ( http://www.dovecot.org/list/dovecot/2007-April/021447.html) where a plugin is mentionned. Has it been developped or is there another solution? I'm using dovecot 1.0.7, shipped with RHEL 5 distribution. I am really discovering all the products around the email so I'm a bit confused. Thanks a lot for your answer, Pierre

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[Dovecot] imap flags - \* - dovecot 1.1.{8,9}
by Arkadiusz Miskiewicz 27 Jan '09

27 Jan '09

Isn't \* supposed to be (almost always) in flags after "SELECT" command in dovecot imap? Isn't \* meaning is "you can store any new flag" ? 20 select INBOX * FLAGS (\Answered \Flagged \Deleted \Seen \Draft) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)] Flags permitted. so no \* ... [..] 50 store 1 +flags $MDNSent * FLAGS (\Answered \Flagged \Deleted \Seen \Draft $MDNSent) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft $MDNSent)] Flags permitted. * 1 FETCH (FLAGS ($MDNSent)) 50 OK Store completed. 60 logout * BYE Logging out 60 OK Logout completed. [ new session ...] 20 select INBOX * FLAGS (\Answered \Flagged \Deleted \Seen \Draft $MDNSent) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft $MDNSent)] Flags permitted. * 4 EXISTS * 2 RECENT * OK [UNSEEN 1] First unseen. * OK [UIDVALIDITY 1181546666] UIDs valid * OK [UIDNEXT 864597] Predicted next UID 20 OK [READ-WRITE] Select completed. ... but it saved $MDNSent flag, huh -- Arkadiusz Miśkiewicz PLD/Linux Team arekm / maven.pl http://ftp.pld-linux.org/

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[Dovecot] dotlock timestamp trouble
by Giorgenes Gelatti 27 Jan '09

27 Jan '09

Hi there, I'm getting a lot of this message in production log: Created dotlock file's timestamp is different than current time (1232468644 vs 1232468524): /path/to/dovecot.index.log The IT guy swears the clocks are sincronized. Whe even have made a test in the machine running dovecot, inside the user's mailbox: # > foo; ls -l --time-style=full-iso foo; date -rw-r--r-- 1 root root 0 2009-01-19 17:40:55.000850000 +0000 foo Mon Jan 19 17:40:55 UTC 2009 The timestamps seems to match. I'm using dovecot 1.1.6 over NFS. Any thoughts? Thanks in advance, gpg

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[Dovecot] No Spaces in Directory names
by Matt Rude 27 Jan '09

27 Jan '09

How can I make it so my users can not create folders with spaces in them? Or allow them to create such folders but rewrite them on the hardrive with a "_" or some other symbol. I have looked threw the wiki but couldn't find anything about folder name restrictions or folder name rewriting (rewrite the space to a "_"). Im having problems with some of the expire and compress scripts when it hits these types of folders. Is dovecot able to restrict or rewrite the names of imap folders? dovecot -n # 1.1.9: /usr/local/etc/dovecot.conf # OS: Linux 2.6.27.9-159.fc10.i686 i686 Fedora release 10 (Cambridge) ext3 listen: *:143 ssl_listen: *:993 ssl_cert_file: /etc/postfix/SSL/mail.mattrude.com.cert ssl_key_file: /etc/postfix/SSL/mail.mattrude.com.key login_dir: /usr/local/var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login login_user: postfix mail_location: maildir:/var/spool/virtualmailboxes/%d/%u/imap/:INBOX=/var/spool/virtualmailboxes/%d/%u/ mail_plugins: quota imap_quota zlib auth default: mechanisms: plain login cram-md5 cache_size: 128 cache_ttl: 600 master_user_separator: * passdb: driver: sql args: /etc/dovecot-mysql.conf passdb: driver: sql args: /etc/dovecot-sql-master.conf pass: yes master: yes userdb: driver: sql args: /etc/dovecot-mysql.conf socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix master: path: /var/run/dovecot/auth-master mode: 384 user: virtualmail group: virtualmail plugin: sieve: /var/spool/virtualmailboxes/%d/%u/dovecot.sieve sieve_storage: = /var/spool/virtualmailboxes/%d/%u/ quota: maildir quota_rule: *:storage=10M quota_rule2: Trash:storage=20% Thanks -Matt

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Re: [Dovecot] help writeing rule for preventin spam
by Sophia Alikhani 27 Jan '09

27 Jan '09

Hi I installed qmail-jms1-7.07 + domainkey-patch + simscan + clamav+ dovecot-1.1.7+ vpopmail+ spamassassin I also used Bayes + AWL as database connection in local.cf I don't know how can i stop these type of spam at MTA level (qmail) i wrote a rule in .dovecot.sieve if header :contains ["From","To"] ["%u@mydomain] { discard; stop; } In the real i nedd to stop any mail from a virtual user to him/her self. -- with regards Sophia Alikhani WorkPhone: +98-21-8497057 Mobile : +98-912-3361036

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