December 2007 - dovecot

[Dovecot] [PATCH, RFC] add APOP authentication mechanism
by Andrey Panin 14 Aug '17

14 Aug '17

Hello all, this patch add APOP authentication mechanism to dovecot 1.0-test23. Please take a look. Best regards. -- Andrey Panin | Linux and UNIX system administrator pazke(a)donpac.ru | PGP key: wwwkeys.pgp.net

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[Dovecot] Spliting Folders for Efficiency
by Daniel Watts 28 Jun '09

28 Jun '09

Dear Timo, Would there be any sense in giving Dovecot the option to split folders into multiple subfolders when they reached a specified size (probably message count) limit? Dovecot would monitor folders and when they reached, say, 10,000 messages, silently split the folder on the filesystem to ensure that access remains fast. I know that Dovecot scales very well but this would give practically unlimited storage capability and also keep things fast. You could even have it so that the latest 100 messages are kept in their own folder for fast access. .Folder.new .Folder.cur .Folder.tmp could become: .Folder__1.new .Folder__1.cur .Folder__1.tmp and .Folder__2.new .Folder__2.cur .Folder__2.tmp with Dovecot merging them before display as just "Folder" within the mail client. This could be further extended so that Dovecot could be configured to store 'old' message folders in a separate location. We could then have slower+cheaper+larger storage mounted so that 'old mail' does not take up the expensive local SCSI disks on the machine. Mail from 2 years ago is much less likely to be accessed than mail from the last week. This would provide very neat behind-the-scenes archiving functionality. Looking forward to hearing your thoughts. Best, Daniel -- Squirrelmail Stable 1.4.8 (and developing on 1.5.2) PHP 5.x Hardened with Eaccelerator Apache 2.x Mysql 5.0.x Imapproxy over Dovecot 1.0.rc27 with Maildir all running on Gentoo Linux for ~5,000 users.

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[Dovecot] compressed mbox patch
by Axel Thimm 16 Jun '09

16 Jun '09

Some ages ago there existed a compressed mbox patch, but now all I can find are posting about it. Does such a beast exist and would it remotely apply to today's dovecot? If not, is there any hope that something like that emerges? Thanks! -- Axel.Thimm at ATrpms.net

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[Dovecot] Feature Missing OUTBOX Folder
by Frank Doege 01 Jun '09

01 Jun '09

Hi Dovecot People, i have switched my system from courier-imap to dovecot and iam quite happy with it, the performance is well and i had nearly no problems. One little feature iam missing is in Courier i had a folder called "Outbox" there i could paste mails which i want to sent out. In some networks its not always available to sent mails via port 21, i know i could just set up my email server to another port but it was a nice feature. Is this a big afford or is it just alittle hack ? could it done via a little plugin ? Thanks Timo & all others for the great work ! Frank

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[Dovecot] Bug? Expunging Symlinked Maildir w/ Lazy_expunge Enabled
by Rich at Whidbey Telecom 05 Oct '08

05 Oct '08

Hi all, Using Dovecot 1.0.3 on RedHat Enterprise 5 (kernel 2.6.18-8.1.6.el5PAE), and NFS storage, we symlinked a Maildir folder: /mailstore/user/Maildir/.Junk -> /junkstore/user/Junkmaildir Everything works fine, until we try to expunge, which produces: A04 NO BUG: Unknown internal error This only happens if "lazy_expunge" is enabled: mail_plugins = quota imap_quota acl lazy_expunge lazy_expunge = .EXPUNGED/ .EXPUNGED/ .EXPUNGED/ Lazy_expunge works great on non-symlinked folders. We tried version 1.1 alpha2, which actually crashes in this scenario. The only fix we've found is to disable "lazy_expunge". Attached is our "dovecot -n" config. Anyone have an idea what might be causing this or a workaround? Thanks! Rich richs(a)whidbey.net # 1.0.3: /shared/dovecot.conf base_dir: /var/dovecot-mail/ log_path: /var/dovecot-mail/dovecot.log protocols: imap imaps pop3 pop3s ssl_ca_file: /adminstore/exim/ssl/instantsslroot.crt ssl_cert_file: /adminstore/exim/ssl/public-mail.crt ssl_key_file: /adminstore/exim/ssl/private-mail.key disable_plaintext_auth: no shutdown_clients: no login_dir: /var/dovecot-mail//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: exim login_greeting: System ready. login_processes_count: 32 login_max_processes_count: 400 verbose_proctitle: yes mail_location: maildir:/mailstore/%Lu/Maildir:INDEX=MEMORY mail_cache_fields: mail_cache_min_mail_count: 65536 mailbox_idle_check_interval: 10 mmap_disable: yes lock_method: dotlock maildir_stat_dirs: yes maildir_copy_with_hardlinks: yes maildir_copy_preserve_filename: yes mail_executable(default): /usr/local/libexec/dovecot/rawlog /usr/local/libexec/dovecot/imap mail_executable(imap): /usr/local/libexec/dovecot/rawlog /usr/local/libexec/dovecot/imap mail_executable(pop3): /usr/local/libexec/dovecot/pop3 mail_plugins(default): quota imap_quota acl lazy_expunge mail_plugins(imap): quota imap_quota acl lazy_expunge mail_plugins(pop3): quota 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 imap_client_workarounds(imap): delay-newmail outlook-idle imap_client_workarounds(pop3): outlook-idle pop3_uidl_format(default): pop3_uidl_format(imap): pop3_uidl_format(pop3): %Mf pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh namespace: type: private separator: . inbox: yes namespace: type: private separator: . prefix: .EXPUNGED/ location: maildir:/mailstore/%u/Expunged:INDEX=MEMORY hidden: yes auth default: mechanisms: plain login passdb: driver: pam args: exim userdb: driver: ldap args: /adminstore/configs/dovecot-ldap.conf plugin: quota: maildir:storage=250000:ignore=Junk acl: vfile:/adminstore/configs/dovecot-acls

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[Dovecot] sieve discard
by Jim Horner 19 Sep '08

19 Sep '08

Does the keyword/action discard work by default or is there something I have to do in the configuration to get to work... maybe I missed something on http://wiki.dovecot.org/LDA/Sieve I have the following rule: if anyof ( header :contains ["Subject"] ["Test Discard"] ) { discard; stop; } but it delivers to INBOX with or w/o the "stop;". If I change the rule to if anyof ( header :contains ["Subject"] ["Test Discard"] ) { fileinto "spam"; stop; } the message will deliver into my spam folder which makes me think I am doing something wrong with "discard". Using 1.0.2 sieve plug-in. Thanks.

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[Dovecot] BUG: messages created with permissions not respecting umask
by Thomas Vander Stichele 20 Jul '08

20 Jul '08

Using dovecot 1.0rc15, together with postfix and dovecot-lda. umask is set to 0007. This should ensure directories and files get created with read/write permissions for both user and group. However, dovecot-lda writes files with 600 permissions, instead of 660. So dovecot does not seem to respect the umask configuration property for local mail delivery. In my particular case, I have vmail:vmail own the mail directories, and a backup user part of the vmail group. However the backup user cannot read the mails and thus back them up properly. Suggestions: - respect the umask for file delivery as well - alternatively, take the parent directory's permissions, strip executable bits, and apply to file Thanks Thomas

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[Dovecot] Postfix & Dovecot LDA
by Jochen Schulz 18 May '08

18 May '08

Hi, before I start to write a lengthy email about something that isn't really possible anyway: can I make Postfix use Dovecot's LDA and start it with different user IDs? My scenario: Dovecot authenticates users for Postfix and itself using Postgresql. Mails for two domains should be stored under /srv/<domain>/<user> (which is the location returned by my user_sql query and mail_location). When my clients login (with usernames of the form 'user@domain'), Dovecot creates/opens the correct mailboxes for them, but I can't get LDA to deliver to these mailboxes. Whatever I try, I am always running into some kind of permission problems (either for the mailboxes, or for auth_socket). I want to use a unique UID for every virtual domain, so I guess LDA needs to have permissions for every corresponding mailbox *and* Dovecot's auth_socket_path. Is there a good solution for this which doesn't involve severe security implications? J. -- If all my friends had Playstations I would buy a Nintendo to prove my individuality. [Agree] [Disagree] <http://www.slowlydownward.com/NODATA/data_enter2.html>

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[Dovecot] imap memory footprint rather large
by martin f krafft 12 May '08

12 May '08

Dear list, I am experimenting with a new mail handling setup and it involves a single IMAP folder with just under 70'000 messages. When OfflineIMAP connects to the server, the imap process starts to eat up a lot of memory: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 15607 madduck 35 19 283m 244m 239m D 16.9 49.3 0:09.96 imap On the contrary, when "online" client, such as Thunderbird connect, memory usage is around 10m, which is entirely acceptable. The way offlineimap reads may is by FETCHing metadata, then APPENDing new local mail, SEARCHing for the UIDs of each uploaded mail, and finally FETCHing new remote mail. Memory use seems to be O(n) in the size of the folder. On the folder with 70k messages, dovecot seems to allocate 280m of memory, which it then fills to about 70% during the metadata FETCH, and then keeps growing while APPEND/SEARCHing the new local messages. The 70k mailbox is just short of 600Mb in size on disk. Dovecot uses 280Mb to serve it. Is it possible that dovecot is reading too much into memory, or over-optimising? Can I somehow tweak this to lower the memory footprint? Cheers, -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck "the unexamined life is not worth living" -- platon spamtraps: madduck.bogus(a)madduck.net

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[Dovecot] Another numptie question - making maildirs for shared mailboxes.
by Stroller 12 May '08

12 May '08

Hi there, Sorry to have so much trouble with my Dovecot setup & to ask so many questions, but I'm having some problems with shared folders. I've read the thread at <http://dovecot.org/pipermail/dovecot/2005-January/006079.html> and added the following lines to /etc/dovecot.conf: namespace private { separator = / prefix = inbox = yes } namespace public { separator = / prefix = General/ location = maildir:/tmp/dovecot-test/ inbox = no hidden = no } So I create a directory /tmp/dovecot-test/ and an empty file /tmp/dovecot-test/dovecot-shared with liberal (777 & 666 respectively) permissions and then try to subscribe to the "General" folder in Outlook - I get a "failed to subscribe to the folder. The server responded `the mailbox doesn't exist: General`" error message, but cur, new & tmp are created in /tmp/dovecot-test. These subfolders are owned by the user that attempted to subscribe & have 700 permissions; chmod'ing them 777 makes no difference. Since "default_mail_env = maildir:%h/.maildir" in dovecot.conf I make a directory /tmp/dovecot-test/.maildir also containing cur, new, tmp & dovecot-shared. When I select "IMAP folders" in Outlook I am still unable to subscribe to "General" but am now able to subscribe to "General/maildir". The subscribed folder is shown in Outlook underneath the users' Inbox as a sub-folder of general, screenshot at <http://linux.stroller.uk.eu.org/DovecotSharedFolders.png> - see how I can't subscribe to "General" alone, but it is "brought in" by subscribing to "General/maildir"? If I try to copy a test message into General then, after a delay of a minute or so, I get "Can't move the items - this IMAP command could not be sent to the server before the connect was terminated"; if I try to copy the test message into General/maildir then I immediately get "Can't copy the items. The server responded: `Internal error occurred. Refer to server log for more information [2005-12-20 12:05:40]". I've tried tinkering with other directory structures under /tmp/dovecot-test/ with no success - can anyone suggest what I'm doing wrong, please? It's quite important to me that the "General" folder is a fairly high-level one - only one additional folder icon should show up for the users' shared mail. At one point I managed to create a folder General/General, but that's undesirable - the users wouldn't understand the concept of having a folder showing in Outlook that they can't write to, or which is only used as a container for another folder. (In any case, I believe I was still unable to write to it). I was about to say, "I know I could resolve this with the use of a symlink-type shared folder, but that's undesirable because I'd have to manually add the symlink for each user that's added to the system", but writing this it occurs to me that I could resolve that by adding the symlink to the the etc/skel/. Nevertheless, I see the namespaces approach as more elegant, as it allows for different user groups having different shared folders. I'd appreciate any advice - I suspect I'm just getting the directory hierarchies wrong, or the syntax of dovecot.conf wrong AGAIN! If anyone with a working shared folders setup could provide a copy of the appropriate section of dovecot.conf & a listing of the appropriate directories then I'd be EXTREMELY grateful. Stroller.

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