- dovecot - dovecot.org

[Dovecot] quick question about fs quota overhead in plugin
by Adam McDougall 28 Nov '07

28 Nov '07

Last night I enabled imap_quota so dovecot could report usage reported by disk quota. I don't intend to actually use the quota plugin to place any limits anytime soon though. How much overhead does this add to normal operations that allocate disk space? Ideally I'd like a situation where the only overhead is incurred when the user uses the mail client to specifically check their usage. Is that possible, and/or is there a better way to do this? If it does cause general overhead on the NFS filer, I could just accept it until/unless I feel it becomes a burden I cannot bear. mail_plugins = acl fts fts_squat quota imap_quota ... quota = fs ...

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[Dovecot] v1.0.8 released
by Timo Sirainen 28 Nov '07

28 Nov '07

http://dovecot.org/releases/1.0/dovecot-1.0.8.tar.gz http://dovecot.org/releases/1.0/dovecot-1.0.8.tar.gz.sig + Authentication: Added "password_noscheme" field that can be used instead of "password". "password" treats "{prefix}" as a password scheme while "password_noscheme" treats it as part of the password itself. So "password_noscheme" should be used if you're storing passwords as plaintext. Non-plaintext passwords never begin with "{", so this isn't a problem with them. - IMAP: Partial body fetching was sometimes non-optimal, causing the entire message to be read for every FETCH command. - deliver failed to save the message when envelope sender address contained spaces. - Maildir++ quota: We could have randomly recalculated quota when it wasn't necessary. - Login process could have crashed after logging in if client sent data before "OK Logged in" reply was sent (i.e. before master had replied that login succeeded). - Don't assert-crash when reading dovecot.index.logs generated by Dovecot v1.1. - Authentication: Don't assert-crash if password beings with "{" but doesn't contain "}". - Authentication cache didn't work when using settings that changed the username (e.g. auth_username_format).

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[Dovecot] IMAP --> Creating Folders --> trailing slash
by Andre Hübner 28 Nov '07

28 Nov '07

Hello List, i use Dovecot 1.0.7 for pop and imap on Suse Linux 10.1. I need a little help in understanding something. If i want to create a folder with outlook express or thunderbird which can also create subfolders, then i have to create these folders with a trailing slash. folders created with trailing slash are in filesystem created als real folders, "normal" folders are created as file. Is it possible to change this behavior? I want to create a folders just by typing a name without trailing slash. It should be possible to store messages in this folder or create subfolders. Is there any workaround to achieve this goal? Thank you Andre

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[Dovecot] little submissions feature request
by Netskin | Corin Langosch 28 Nov '07

28 Nov '07

Hi! I'm using dovecot for a while now and really like it. Actually dovecot 1.5 on Debian AMD64. Now I have to use a cifs mounted maildir directory and found it to be quite slow, though I already tuned it a lot. The only way to get it fast was to put INDEX and CONTROL files on the local disc and so outside of the maildirs. Performance is great but the problem is with submissions to maildirs. When a CONTROL directive is given, dovecot writes the submissions file to this directory too. Now as I have two dovecots in a loadbalancer my users have to do their modifications to their subscriptions always twice (for each server in the loadbalancer). I now modified dovecot on my own to put the submissions file into the Maildir, everything else is unchanged. This works just great and as desired. Anything I missed in my setup, locking issues, ...? Otherwise it may worth adding a switch for this? A directive like INDEX, CONTROL... :SUBMISSSIONS=path... Regards, Corin

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[Dovecot] 1.1.beta8 crashes with segfault when SIGHUP
by arvids 28 Nov '07

28 Nov '07

Hello, dovecot crashes when it receives -HUP signal. It happens always if there was some activity - for example, if I start dovecot, check any account through POP3 and then send -HUP to dovecot process, it crashes with the following log entry: segfault at 00000008 eip 0804d3fb esp bfdd3860 error 4 If there were no activity at all since starting, it does not crash. my dovecot -n output: # 1.1.beta8: /usr/local/dovecot/etc/dovecot.conf base_dir: /var/run/dovecot/ syslog_facility: local0 protocols: pop3 ssl_disable: yes disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/local/dovecot/libexec/dovecot/pop3-login login_greeting: Server. login_process_per_connection: no login_process_size: 64 login_processes_count: 5 login_max_processes_count: 32 verbose_proctitle: yes first_valid_uid: 95 first_valid_gid: 95 mail_uid: 95 mail_gid: 95 mail_location: maildir:~/Maildir mail_debug: yes dotlock_use_excl: yes fsync_disable: yes mail_executable: /usr/local/dovecot/libexec/dovecot/pop3 mail_plugins: quota mail_plugin_dir: /usr/local/dovecot/lib/dovecot/pop3 pop3_enable_last: yes pop3_client_workarounds: outlook-no-nuls oe-ns-eoh auth default: mechanisms: plain login digest-md5 cram-md5 apop cache_size: 4096 cache_ttl: 28800 cache_negative_ttl: 60 user: doveauth verbose: yes debug: yes debug_passwords: yes passdb: driver: sql args: /usr/local/dovecot/etc/dovecot-sql.conf userdb: driver: prefetch userdb: driver: sql args: /usr/local/dovecot/etc/dovecot-sql.conf socket: type: listen master: path: /var/run/dovecot/auth-master mode: 384 user: vmail group: vmail plugin: quota: dict:::proxy:/var/run/dovecot/dict-server:quotadict dict: quotadict: mysql:/usr/local/dovecot/etc/dovecot-sql-dict-quota.conf Regards, Arvids

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[Dovecot] 1.1.beta9 deliver crashes with segfault
by arvids 28 Nov '07

28 Nov '07

Hello, after upgrade from beta8 to beta9 deliver process crashes with segfault. Deleting old maildirs does not help. Here is backtrace: Program received signal SIGSEGV, Segmentation fault. 0x0808e36d in mail_cache_field_get_decision (cache=0x8114da0, field_idx=128) at mail-cache-lookup.c:301 301 i_assert(field_idx < cache->fields_count); (gdb) bt #0 0x0808e36d in mail_cache_field_get_decision (cache=0x8114da0, field_idx=128) at mail-cache-lookup.c:301 #1 0x0808f351 in mail_cache_field_can_add (ctx=0x810ca58, seq=1, field_idx=4) at mail-cache-transaction.c:997 #2 0x0808351f in index_mail_want_cache (mail=0x810ce00, field=<value optimized out>) at index-mail.c:597 #3 0x08084046 in index_mail_cache_sizes (mail=0x810ce00) at index-mail.c:618 #4 0x080845a7 in index_mail_close (_mail=0x810ce00) at index-mail.c:971 #5 0x0808510e in index_mail_free (_mail=0x810ce00) at index-mail.c:1166 #6 0x080a8e20 in mail_free (mail=0x810cdcc) at mail.c:18 #7 0xb7e3dd3c in quota_mailbox_transaction_commit (ctx=0x810c6f8, uid_validity_r=0xbfedf444, first_saved_uid_r=0xbfedf444, last_saved_uid_r=0xbfedf444) at quota-storage.c:100 #8 0x080aa525 in mailbox_transaction_commit (t=0xbfedf484) at mail-storage.c:661 #9 0x08059304 in deliver_save (namespaces=0x80f1210, storage_r=0xbfedf558, mailbox=0x80d6918 "INBOX", mail=0x80f8260, flags=0, keywords=0x0) at deliver.c:146 #10 0x0805a6cd in main (argc=1301916, argv=0xbfedf614) at deliver.c:898 my dovecot -n output: # 1.1.beta9: /usr/local/dovecot/etc/dovecot.conf base_dir: /var/run/dovecot/ syslog_facility: local0 protocols: pop3 ssl_disable: yes disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/local/dovecot/libexec/dovecot/pop3-login login_greeting: Server. login_process_per_connection: no login_processes_count: 5 login_max_processes_count: 32 verbose_proctitle: yes first_valid_uid: 95 first_valid_gid: 95 mail_uid: 95 mail_gid: 95 mail_location: maildir:~/Maildir mail_debug: yes dotlock_use_excl: yes fsync_disable: yes mail_executable: /usr/local/dovecot/libexec/dovecot/pop3 mail_plugins: quota mail_plugin_dir: /usr/local/dovecot/lib/dovecot/pop3 pop3_enable_last: yes pop3_client_workarounds: outlook-no-nuls oe-ns-eoh auth default: mechanisms: plain login digest-md5 cram-md5 apop cache_size: 1024 cache_ttl: 600 cache_negative_ttl: 60 user: doveauth verbose: yes debug: yes debug_passwords: yes passdb: driver: sql args: /usr/local/dovecot/etc/dovecot-sql.conf userdb: driver: prefetch userdb: driver: sql args: /usr/local/dovecot/etc/dovecot-sql.conf socket: type: listen master: path: /var/run/dovecot/auth-master mode: 384 user: vmail group: vmail plugin: quota: dict:::proxy:/var/run/dovecot/dict-server:quotadict dict: quotadict: mysql:/usr/local/dovecot/etc/dovecot-sql-dict-quota.conf Regards, Arvids

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[Dovecot] Can't login from Mac OS X Mail.app
by Mike McGonagle 28 Nov '07

28 Nov '07

Hello all, I have been working on getting this machine -- Peace may sound simple—one beautiful word— but it requires everything we have, every quality, every strength, every dream, every high ideal. —Yehudi Menuhin (1916–1999), musician

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[Dovecot] Embracing .99
by Joe Allesi -X (joallesi - Coyote Creek Consulting at Cisco) 28 Nov '07

28 Nov '07

We're stuck on RHEL 4.x, so we're currently working on a plan to live in harmony with .99 for another year or so. With that said, the plan is below. Let me know if you have any other recommendations. [ ]Convert to high-performance mode vice high-security to reduce overall resource usage. [ ]Implement iptables throttling for new connections to prevent denials of service. [ ]Covert from mbox to maildir to help reduce the likelihood of corruption that lead to mailbox outages. As our overall individual mailbox usage is low, maildir seems to be a good option as mbox corruption has severely impacted a few of our high-profile applications. However, does anyone know of a sane method to use maildir on RHEL 4.x without switching over to Postfix? Thanks!

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[Dovecot] Various uidlist and index errors with 1.1 on NFS
by Adam McDougall 28 Nov '07

28 Nov '07

Two nights ago I took a leap and extended my testing of dovecot 1.1 by replacing 1.0 for the approx 15 users I had on 1.0. At that time I also for the first time tried dovecot 1.1 in a load balanced 2 server configuration with indexes on NFS. I was hoping I did this right, using the mail_nfs params and 1.1 so fchown etc would flush the access cache, but I am getting a number of messages and errors that indicate things aren't happy. Attaching error logs. Some of the errors were caused by me running multiple mail clients including mutt, Thunderbird, Outlook Express, other users may be using one or more copies of thunderbird, or possibly other clients. Most commonly thunderbird. Any help or advice would be appreciated. My goal is to have shared indexes between servers since I will eventually have 4. I'd prefer to avoid maintaining some kind of user->server preference mapping in a proxy (haven't looked into it yet). Thanks. # 1.1.beta6: /usr/local/etc/dovecot.conf ssl_cert_file: /usr/local/etc/apache2/ssl/mail.pem ssl_key_file: /usr/local/etc/apache2/ssl/mail.pem login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login verbose_proctitle: yes first_valid_uid: 1000 first_valid_gid: 1000 mail_extra_groups: postlocal mail_location: maildir:%h/Maildir:CONTROL=%h/Maildir/dovecot/private/control:INDEX=%h/Maildir/dovecot/private/indexes mmap_disable: yes mail_nfs_storage: yes mail_nfs_index: yes mail_plugins: acl mail_log_max_lines_per_sec: 0 imap_client_workarounds: delay-newmail netscape-eoh tb-extra-mailbox-sep namespace: type: private separator: / inbox: yes list: yes subscriptions: yes namespace: type: private separator: / prefix: mail/ hidden: yes subscriptions: yes namespace: type: private separator: / prefix: Mail/ hidden: yes subscriptions: yes namespace: type: public separator: / prefix: #shared/decs/ location: maildir:/egr/mail/shared/decs:CONTROL=%h/Maildir/dovecot/public/control/decs:INDEX=%h/Maildir/dovecot/public/indexes/decs list: yes subscriptions: yes auth default: passdb: driver: pam userdb: driver: passwd args: system_user= socket: type: listen client: path: /var/spool/postfix/private/auth mode: 384 user: postfix group: postfix plugin: acl: vfile:/usr/local/etc/dovecot-acls:cache_secs=10

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[Dovecot] Fwd: Re: Fwd: dovecot bug report (64 bit file offsets)
by markevich＠inbox.lv 27 Nov '07

27 Nov '07

Yes, the problem is the compatibility with the mysql library but I stull can't figure out how this might affect reading/writing. ---------- Forwarded message ---------- No: markevich(a)inbox.lv Kam: Marcus Rueckert <darix(a)opensu.se> Atbildt: markevich(a)inbox.lv Datums: Tue, 27 Nov 2007 14:15:29 +0200 Temats: Re: [Dovecot] Fwd: dovecot bug report (64 bit file offsets) I agree that it’s kind strange behavior. Also I’ve googled that exactly the same errors (unexpected eof found … on file ‘UNOPENED’) were related to mysql. But how mysql compile options might affect configuration file parsing and read/write operations? (indexes for example) Does any one have any idea why this might happen? “any slight change to the main dovecot.conf file can prevent dovecot from starting (segfault with "Unexpected eof found when reading file 'UNOPENED' (Errcode: 0)" message), whereas i386 packages work somewhat better.” http://dovecot.org/list/dovecot/2006-April/012340.html Regards, Andris Quoting Marcus Rueckert : which is funny actually as on opensuse (10.1 -> 10.3 -> factory) has no problem with dovecot running on x86_64. darix -- openSUSE - SUSE Linux is my linux openSUSE is good for you www.opensuse.org -- Tavs bezmaksas pasts Inbox.lv Links: ------ [1] mailto:darix@opensu.se ---------- End of forwarded message ---------- -- Tavs bezmaksas pasts Inbox.lv

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