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[Dovecot] Manually creating dovecot- files after isync/mbsync mirror
by Dale Gallagher 19 Dec '12

19 Dec '12

Hi everyone I'm using isync 1.0.5 patched to do recursive folder listing and mirroring mail from an external party's IMAP server to a local Maildir, which will be accessed by Dovecot 2.0.9. In order to prevent IMAP clients from re-downloading their mail, when connecting to Dovecot, I'm busy writing a script to generate appropriate dovecot-uidlist and dovecot-uidvalidity files, per Maildir. isync stores the uid in the filename, so that's extractable, per message, and the uidvalidity and current max uid are stored in a file .uidvalidity, in each Maildir. I've read the docs here: http://wiki2.dovecot.org/MailboxFormat/Maildir Regarding the dovecot-uidlist header (first line) - I've tried to search for and figure out what exactly is meant by the "mailbox global uid" and once I do, how to manually generate the 128 bit hex variation of it? Could someone elaborate on this, please. How would omitting the global uid field, beginning with G, affect remote clients' syncing of mail? Is this field mandatory? I also see that Dovecot's uidvalidity is of the form 4df8a4e2, whereas isync uses an integer. I'd appreciate it if someone could elaborate on what Dovecot uses and whether I can convert one to the other? I'll post the full solution, once complete, and working. Thanks. Dale

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Re: [Dovecot] Automatically Cleaning Kerberos Credential Cache Files
by Joseph Tam 19 Dec '12

19 Dec '12

Ben Morrow writes: > In any case, it's likely that the delivery process looks in the user's > home directory even if delivery is to a separate mail spool, unless > you've taken steps to prevent this. I can confirm this. I think the reason is that dovecot changes to the user's home directory so that it has a place to dump core. This causes problem for my setup since I user per-user NFS mounts, so a delivery to an internal mailing list caused hundreds of NFS automounts. I patched this behaviour out, but there is probably a more elegant solution (unset MAIL_STORAGE_SERVICE_FLAG_ENABLE_CORE_DUMPS? How?). Joseph Tam <jtam.home(a)gmail.com> --- ./src/lib-storage/mail-storage-service.c~ Sat May 19 08:42:12 2012 +++ ./src/lib-storage/mail-storage-service.c Mon Jun 25 22:00:57 2012 @@ -615,21 +615,21 @@ - if ((user->flags & MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP) != 0 && - (user->flags & MAIL_STORAGE_SERVICE_FLAG_ENABLE_CORE_DUMPS) == 0) { - /* we don't want to write core files to any users' home - directories since they could contain information about other - users' mails as well. so do no chdiring to home. */ - } else if (*home != '\0' && - (user->flags & MAIL_STORAGE_SERVICE_FLAG_NO_CHDIR) == 0) { - /* If possible chdir to home directory, so that core file - could be written in case we crash. */ - if (chdir(home) < 0) { - if (errno == EACCES) { - i_error("%s", eacces_error_get("chdir", - t_strconcat(home, "/", NULL))); - } if (errno != ENOENT) - i_error("chdir(%s) failed: %m", home); - else if (mail_set->mail_debug) - i_debug("Home dir not found: %s", home); - } - } +// if ((user->flags & MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP) != 0 && +// (user->flags & MAIL_STORAGE_SERVICE_FLAG_ENABLE_CORE_DUMPS) == 0) { +// /* we don't want to write core files to any users' home +// directories since they could contain information about other +// users' mails as well. so do no chdiring to home. */ +// } else if (*home != '\0' && +// (user->flags & MAIL_STORAGE_SERVICE_FLAG_NO_CHDIR) == 0) { +// /* If possible chdir to home directory, so that core file +// could be written in case we crash. */ +// if (chdir(home) < 0) { +// if (errno == EACCES) { +// i_error("%s", eacces_error_get("chdir", +// t_strconcat(home, "/", NULL))); +// } if (errno != ENOENT) +// i_error("chdir(%s) failed: %m", home); +// else if (mail_set->mail_debug) +// i_debug("Home dir not found: %s", home); +// } +// }

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[Dovecot] Removing configured SSL certificate file from disk while Dovecot is running spams syslog
by Nils 19 Dec '12

19 Dec '12

Hi! [root@mikan ~]# dovecot --version 2.1.12 When I remove the SSL certificate from disk while Dovecot is running, it spams syslog with the following log message over and over: Dec 6 17:41:41 mikan dovecot: config: Fatal: Error in configuration file /etc/dovecot/conf.d/10-ssl.conf line 12: ssl_cert: Can't open file /etc/ssl/private/dovecot.pem: No such file or directory Dec 6 17:41:41 mikan dovecot: config: Fatal: Error in configuration file /etc/dovecot/conf.d/10-ssl.conf line 12: ssl_cert: Can't open file /etc/ssl/private/dovecot.pem: No such file or directory Dec 6 17:41:41 mikan dovecot: config: Fatal: Error in configuration file /etc/dovecot/conf.d/10-ssl.conf line 12: ssl_cert: Can't open file /etc/ssl/private/dovecot.pem: No such file or directory [...] Reporting that the certificate went away is fine and useful, but spamming the syslog over and over with hundreds of entries per second(!) is annoying. :( I know what I'm doing, so reporting it once per connection attempt or something is enough. Even if Dovecot just decides to terminate, that would be fine. But a denial of service attack on syslog is not nice. Configuration output follows below. All the best, Nils [root@mikan ~]# dovecot -n # 2.1.12: /etc/dovecot/dovecot.conf # OS: Linux 3.5.4-1-ARCH x86_64 auth_failure_delay = 5 secs auth_mechanisms = plain login auth_verbose = yes listen = *,:: login_greeting = mail_location = maildir:~/.maildir namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } protocols = pop3 service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { port = 995 ssl = yes } } service pop3 { process_limit = 10 } ssl_cert = </etc/ssl/private/dovecot.pem ssl_key = </etc/ssl/private/dovecot.key userdb { driver = passwd } protocol imap { imap_idle_notify_interval = 2 mins mail_max_userip_connections = 5 } protocol pop3 { mail_max_userip_connections = 5 pop3_logout_format = pop3_save_uidl = no pop3_uidl_format = %08Xu%08Xv }

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[Dovecot] During FTS reindexing, search commands unceremoniously exit
by Dave Abrahams 19 Dec '12

19 Dec '12

Is this intentional? Closing the connection without warning doesn't seem like the best response... --8<---------------cut here---------------start------------->8--- % printf "1 select \"INBOX\"\n2 search body quack\n3 logout\n" | /opt/local/libexec/dovecot/imap * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE SEARCH=FUZZY] Logged in as dave * FLAGS (\Answered \Flagged \Deleted \Seen \Draft gnus-forward gnus-expire) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft gnus-forward gnus-expire \*)] Flags permitted. * 31 EXISTS * 0 RECENT * OK [UIDVALIDITY 1349969399] UIDs valid * OK [UIDNEXT 1376] Predicted next UID * OK [HIGHESTMODSEQ 2908] Highest 1 OK [READ-WRITE] Select completed. imap(dave): Info: Connection closed in=45 out=2027404 % --8<---------------cut here---------------end--------------->8--- -- Dave Abrahams BoostPro Computing Software Development Training http://www.boostpro.com Clang/LLVM/EDG Compilers C++ Boost

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[Dovecot] Documentation of Redis and Memcache Backends
by Urban Loesch 19 Dec '12

19 Dec '12

Hi, in the release notes of 2.1.9 I read that dovecot supports memcache and redis backends for userdb/passdb authentication. This is very interesting for me and should reduce queries and database load of our mysql servers. My idea is to use memcache or redis in our IMAP/POP3 proxies in front of our backend servers. So I would like to try out if it's possible to store proxy information of our backends. For example the backend ip adress. But in the wiki I found only a few configuration settings for redis backend. http://master.wiki2.dovecot.org/AuthDatabase/Dict Also the mentioned example config file "dovecot-dict-auth.conf.ext" with full list of configuration options does not exits in the source of 2.1.11. Have you any idea where I can find the full info or any howtos? Many thanks and regards Urban

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[Dovecot] Error: unlink_directory(.../lucene-indexes) with doveadm index
by Fred Kilbourn 19 Dec '12

19 Dec '12

Hi, Per discussion on this previous thread: http://dovecot.org/pipermail/dovecot/2012-October/068849.html I am updating search indexes on all my mailboxes via a nightly cronjob that runs: doveadm index -A '*' The problem we're running into is that random mailboxes will throw the following error during the update (sanitized to conceal actual domain name): doveadm(user(a)domain.com): Error: unlink_directory(/var/spool/mail/domain.com/user/sdbox/lucene-indexes) failed: Permission denied We have around 250 domains on the server, with a handful of mailboxes on average in each domain. We get this for a varying number of total mailboxes (1 to 6 every night). It is common for the same mailbox to show up a few days in a row and then stop throwing the error. The script is running as root, so there shouldn't be any file level permissions. Any thoughts on the root cause of these errors? What can I provide to help further diagnose? Thanks, Fred Kilbourn

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[Dovecot] indexer-worker Panic
by Dave Abrahams 19 Dec '12

19 Dec '12

I just found this in my logs. Any idea? --8<---------------cut here---------------start------------->8--- 12/4/12 12:33:43.831 PM dovecot[2660]: indexer-worker(dave): Panic: file mailbox-list-fs.c: line 156 (fs_list_get_path): assertion failed: (mailbox_list_is_valid_pattern(_list, name)) 12/4/12 12:33:43.831 PM dovecot[2660]: indexer-worker(dave): Error: Raw backtrace: 2 libdovecot.0.dylib 0x000000010840e6c4 default_fatal_finish + 36 -> 3 libdovecot.0.dylib 0x000000010840f3e1 i_internal_fatal_handler + 49 -> 4 libdovecot.0.dylib 0x000000010840e98e i_panic + 158 -> 5 libdovecot-storage.0.dylib 0x0000000108340693 fs_list_get_path + 467 -> 6 indexer-worker 0x00000001082e7341 master_connection_input + 513 -> 7 libdovecot.0.dylib 0x000000010841b5 12/4/12 12:33:43.831 PM dovecot[2660]: indexer-worker(dave): Error: ce io_loop_call_io + 46 -> 8 libdovecot.0.dylib 0x000000010841c737 io_loop_handler_run + 215 -> 9 libdovecot.0.dylib 0x000000010841b7e8 io_loop_run + 88 -> 10 libdovecot.0.dylib 0x00000001084079c8 master_service_run + 24 -> 11 indexer-worker 0x00000001082e7001 main + 321 -> 12 libdyld.dylib 0x00007fff93d117e1 start + 0 -> 13 ??? 0x0000000000000001 0x0 + 1 12/4/12 12:33:44.035 PM dovecot[2660]: indexer: Error: Indexer worker disconnected, discarding 5 requests for dave 12/4/12 12:33:44.036 PM dovecot[2660]: indexer-worker(dave): Fatal: master: service(indexer-worker): child 2665 killed with signal 6 (core dumps disabled) 12/4/12 12:34:17.094 PM dovecot[2660]: indexer-worker(dave): Panic: file mailbox-list-fs.c: line 156 (fs_list_get_path): assertion failed: (mailbox_list_is_valid_pattern(_list, name)) 12/4/12 12:34:17.094 PM dovecot[2660]: indexer-worker(dave): Error: Raw backtrace: 2 libdovecot.0.dylib 0x000000010d1dd6c4 default_fatal_finish + 36 -> 3 libdovecot.0.dylib 0x000000010d1de3e1 i_internal_fatal_handler + 49 -> 4 libdovecot.0.dylib 0x000000010d1dd98e i_panic + 158 -> 5 libdovecot-storage.0.dylib 0x000000010d10d693 fs_list_get_path + 467 -> 6 indexer-worker 0x000000010d0b7341 master_connection_input + 513 -> 7 libdovecot.0.dylib 0x000000010d1ea5 12/4/12 12:34:17.094 PM dovecot[2660]: indexer-worker(dave): Error: ce io_loop_call_io + 46 -> 8 libdovecot.0.dylib 0x000000010d1eb737 io_loop_handler_run + 215 -> 9 libdovecot.0.dylib 0x000000010d1ea7e8 io_loop_run + 88 -> 10 libdovecot.0.dylib 0x000000010d1d69c8 master_service_run + 24 -> 11 indexer-worker 0x000000010d0b7001 main + 321 -> 12 libdyld.dylib 0x00007fff93d117e1 start + 0 -> 13 ??? 0x0000000000000001 0x0 + 1 12/4/12 12:34:17.286 PM dovecot[2660]: indexer: Error: Indexer worker disconnected, discarding 5 requests for dave 12/4/12 12:34:17.286 PM dovecot[2660]: indexer-worker(dave): Fatal: master: service(indexer-worker): child 2677 killed with signal 6 (core dumps disabled) 12/4/12 12:35:48.633 PM dovecot[2660]: indexer-worker(dave): Panic: file mailbox-list-fs.c: line 156 (fs_list_get_path): assertion failed: (mailbox_list_is_valid_pattern(_list, name)) 12/4/12 12:35:48.633 PM dovecot[2660]: indexer-worker(dave): Error: Raw backtrace: 2 libdovecot.0.dylib 0x0000000107b606c4 default_fatal_finish + 36 -> 3 libdovecot.0.dylib 0x0000000107b613e1 i_internal_fatal_handler + 49 -> 4 libdovecot.0.dylib 0x0000000107b6098e i_panic + 158 -> 5 libdovecot-storage.0.dylib 0x0000000107a95693 fs_list_get_path + 467 -> 6 indexer-worker 0x0000000107a3d341 master_connection_input + 513 -> 7 libdovecot.0.dylib 0x0000000107b6d5 12/4/12 12:35:48.634 PM dovecot[2660]: indexer-worker(dave): Error: ce io_loop_call_io + 46 -> 8 libdovecot.0.dylib 0x0000000107b6e737 io_loop_handler_run + 215 -> 9 libdovecot.0.dylib 0x0000000107b6d7e8 io_loop_run + 88 -> 10 libdovecot.0.dylib 0x0000000107b599c8 master_service_run + 24 -> 11 indexer-worker 0x0000000107a3d001 main + 321 -> 12 libdyld.dylib 0x00007fff93d117e1 start + 0 -> 13 ??? 0x0000000000000001 0x0 + 1 12/4/12 12:35:48.838 PM dovecot[2660]: indexer: Error: Indexer worker disconnected, discarding 5 requests for dave 12/4/12 12:35:48.838 PM dovecot[2660]: indexer-worker(dave): Fatal: master: service(indexer-worker): child 2694 killed with signal 6 (core dumps disabled) --8<---------------cut here---------------end--------------->8--- -- Dave Abrahams BoostPro Computing Software Development Training http://www.boostpro.com Clang/LLVM/EDG Compilers C++ Boost

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[Dovecot] Dovecot version 1.2.17
by Philip Coackley 18 Dec '12

18 Dec '12

Hello, I am currently performing retrospective upgrades to an old ubuntu 9.10 Karmic Kola server. I need to upgrade dovecot 1.1.11 to 1.2.17 then to 2.0 etc. I have downloaded the binaries and run ./configure make make install. Dovecot compiles OK however I can not get the ./configure options to install at the following locations: executable: /usr/sbin/ config: /etc/dovecot/ Question: What are the ./configure options to do this? What are the ./configure options used to create the executable for unbuntu? (especially 9.10 if different). Reason for upgrade is auth-login errors every 2-3 weeks with 1.1.11 - looking at the release descriptions, this should fix this and the memory leaks! Phil Coackley

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[Dovecot] Possible bug not sure on which end
by joshua.trier＠hostrocket.com 18 Dec '12

18 Dec '12

Hello Serveral of our clients are running into a problem relating to Gmails change in their "Check mail from other accounts (using POP3):". It seems related to the response dovecot sends back on a connection. Gmail is checking for a +OK in the header, however dovecot is sending OK without a prefix of +. Here is the response from Gmail webmail "Missing +OK response upon connecting to the server: * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN] Dovecot ready." Here is dovecot header on a pop3-ssl connection * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN] Dovecot ready. Who's end is this problem on? Google's, dovecots? Anyway to enable the response to include a +? Thanks Josh

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Re: [Dovecot] Non-dovecot user looking for feedback
by Joseph Tam 17 Dec '12

17 Dec '12

On Mon, 17 Dec 2012, Chris Ross wrote: > I've been using UW-IMAPd for neigh on forever (at least since 2001). > But, as it's basically stalled, and I'm about to update the hardware > that is my mail server, I thought it was time to review existing > open-source IMAP servers. Dovecot is the top three in my looking. I converted a few years ago and never looked back. > So, am I right that dovecot supports only the "one big full file" mbox > format, and the maildir format? And if so, is it known to allow > multiple simultaneous IMAP clients to access and monitor and/or modify > the same folder simultaneously? I still run using mbox, and have not had a problem with corruption, however, this is probably owing to our modest IMAP demand and careful coordination of file locks among all the different MUAs. You're better off with Maildir and other formats, that are better designed for simultaneous access. There are other good reasons to switch formats. Dovecot also supports its own mdbox/sdbox for high performance: its a hybrid that tries to incorporate the best of both words. More info http://wiki2.dovecot.org/MailboxFormat > After those questions, it's just a "what do you think the pros and cons > of each are?" I can't speak to the other software you are looking at, but two factors I found to be particularly good: - flexibility: you can get almost every oddball setup to work. Migration from uw-imapd is fairly easy, but then again, uw-imapd didn't have a lot of knobs to turn. Plugins are available that extends its functionality. - support: this mailing list is great, and Timo is an absolute wizard in getting bugs fixed. (Note: I am shamelessly buttering him up so that he fixes the outstanding bug I reported!) Joseph Tam <jtam.home(a)gmail.com>

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