- dovecot - dovecot.org

[Dovecot] dovecot behind loadbalancers
by Robert Schetterer 31 Oct '08

31 Oct '08

Hi @ll, has anbody experience with dovecot behind load balancers im planning to test ha-proxy pen balance(ng) on ubuntu hardy in a HA-Cluster in front of dovecot servers -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria

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[Dovecot] Dovecot read only for users
by JC 31 Oct '08

31 Oct '08

All, I have hopefully a base question. How do you give users only read access to their inbox and folders? If I use chmod 600 they have full access. If I do a 400 they have read access but cannot access their inbox. The config file is the out of the box config other than advertising IMAP and IMAPS. Any help will be appreciated. Thanks.

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[Dovecot] Startup info message
by Athan Dimoy 31 Oct '08

31 Oct '08

Hi folks, I'm using the latest Dovecot 1.16 with Postfix for my FreeBSD box. Since v1.1.4 (if i remember correctly), the following message is displayed whenever starting Dovecot. "Info: If you have trouble with authentication failures, enable auth_debug setting. See http://wiki.dovecot.org/WhyDoesItNotWork" Besides that, Dovecot works great but I wonder what this message is all about. I've searched wiki and mailing list but didn't find anything related. PS: I removed Dovecot removing all stalled files and directories and reinstalled it from scratch. Still the message is displayed whenever it starts. Any idea? Athan

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[Dovecot] SIGBART/SIGSEGV while SELECTing virtual folder
by Lars Noschinski 30 Oct '08

30 Oct '08

Hello! I just installed Dovecot's latest nightly build (20081020) and tried the virtual folder features. I started with a really simple "all" folder: | # virtual/all | * | all But selecting this folder causes dovecot to panic (in most cases). While trying to debug this, I got slightly different results and I am not really sure yet if this is just non-deterministic, depends on some cached dovecot data or if there is some difference between the debug build or my rudimentary, unpatched debian package (which lacks the debug symbols). The results below are from a build with --prefix set to a clean, temporary directory. Similar problems occured also with the alpha2 release, which caused me to try the latest nightly build. --------------------------------------------------------------------- % ./sbin/dovecot --exec-mail ext /usr/bin/gdb ./libexec/dovecot/imap GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i486-linux-gnu"... (gdb) r Starting program: /tmp/dd/libexec/dovecot/imap * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT THREAD=REFERENCES MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTE NDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH SEARCHRES WITHIN CONTEXT=SEARCH] Logg ed in as lars . SELECT virtual/all Program received signal SIGSEGV, Segmentation fault. mailbox_search_result_free (_result=0x8efc0d0) at mailbox-search-result.c:65 65 results = array_get(&result->box->search_results, &count); (gdb) bt full #0 mailbox_search_result_free (_result=0x8efc0d0) at mailbox-search-result.c:65 result = (struct mail_search_result *) 0x0 i = <value optimized out> __PRETTY_FUNCTION__ = "mailbox_search_result_free" #1 0xb7f4e12e in virtual_storage_mailbox_close (box=0x8efbeb0) at virtual-storage.c:311 i = 0 ret = 0 #2 0x080a9299 in mail_thread_mailbox_close (box=0x8efbeb0) at index-thread.c:638 tbox = (struct mail_thread_mailbox *) 0x9517c68 ret = <value optimized out> __PRETTY_FUNCTION__ = "mail_thread_mailbox_close" #3 0x0806486a in cmd_select_finish (ctx=0x8ef3778, ret=0) at cmd-select.c:190 No locals. #4 0x08064a89 in cmd_select_full (cmd=0x8ef3730, readonly=false) at cmd-select.c:381 client = (struct client *) 0x8ef34b0 box = (struct mailbox *) 0xbfb78258 ctx = (struct imap_select_context *) 0x8ef3778 args = (const struct imap_arg *) 0x8ef87b0 mailbox = 0x8ef8838 "all" ret = 0 __PRETTY_FUNCTION__ = "cmd_select_full" #5 0x080653d9 in cmd_select (cmd=0x8ef3730) at cmd-select.c:387 No locals. #6 0x0806755c in client_command_input (cmd=0x8ef3730) at client.c:592 client = (struct client *) 0x8ef34b0 command = <value optimized out> __PRETTY_FUNCTION__ = "client_command_input" #7 0x080675f9 in client_command_input (cmd=0x8ef3730) at client.c:641 client = (struct client *) 0x8ef34b0 command = <value optimized out> __PRETTY_FUNCTION__ = "client_command_input" #8 0x08067bfd in client_handle_input (client=0x8ef34b0) at client.c:682 _data_stack_cur_id = 3 ret = <value optimized out> remove_io = <value optimized out> handled_commands = false #9 0x080680b3 in client_input (client=0x8ef34b0) at client.c:737 cmd = <value optimized out> output = (struct ostream *) 0x8ef365c bytes = <value optimized out> __PRETTY_FUNCTION__ = "client_input" #10 0x080f3210 in io_loop_handler_run (ioloop=0x8eefab8) at ioloop-epoll.c:203 ctx = (struct ioloop_handler_context *) 0x8eefbb0 event = (const struct epoll_event *) 0x8eefbf0 list = (struct io_list *) 0x8ef36d8 io = (struct io_file *) 0x8ef36b8 tv = {tv_sec = 1799, tv_usec = 999384} t_id = 2 msecs = <value optimized out> ret = 1 i = 0 j = 0 call = <value optimized out> #11 0x080f26a0 in io_loop_run (ioloop=0x8eefab8) at ioloop.c:320 No locals. #12 0x0806f54d in main (argc=149943736, argv=0xbfb78484, envp=0xbfb7848c) at main.c:309 No locals. --------------------------------------------------------------------- On another folder with the same dovecot-virtual file, I get another backtrace: --------------------------------------------------------------------- % ./sbin/dovecot --exec-mail ext /usr/bin/gdb ./libexec/dovecot/imap GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i486-linux-gnu"... (gdb) r Starting program: /tmp/dd/libexec/dovecot/imap * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT THREAD=REFERENCES MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH SEARCHRES WITHIN CONTEXT=SEARCH] Logged in as lars . SELECT "virtual/test" Program received signal SIGABRT, Aborted. 0xb7e83556 in raise () from /lib/libc.so.6 (gdb) bt #0 0xb7e83556 in raise () from /lib/libc.so.6 #1 0xb7e84d78 in abort () from /lib/libc.so.6 #2 0x080ead25 in default_fatal_finish (type=<value optimized out>, status=0) at failures.c:150 #3 0x080eade4 in i_syslog_fatal_handler (type=LOG_TYPE_PANIC, status=0, fmt=0x80ffdec "file %s: line %d (%s): assertion failed: (%s)", args=0xbfdce064 "\203�020\b\t\001") at failures.c:308 #4 0x080ea729 in i_panic ( format=0x80ffdec "file %s: line %d (%s): assertion failed: (%s)") at failures.c:197 #5 0x080c86b8 in view_lookup_seq_range (view=0x9956648, first_uid=1, last_uid=0, first_seq_r=0xbfdce294, last_seq_r=0xbfdce290) at mail-index-view.c:265 #6 0x080c815c in mail_index_lookup_seq_range (view=0x9956648, first_uid=1, last_uid=0, first_seq_r=0xbfdce294, last_seq_r=0xbfdce290) at mail-index-view.c:530 #7 0xb7fa64d6 in virtual_sync_backend_boxes (ctx=0x9e2e3e0) at virtual-sync.c:561 #8 0xb7fa738f in virtual_storage_sync_init (box=0x9811eb0, flags=65) at virtual-sync.c:1194 #9 0x080b0240 in mailbox_sync (box=0x578d, flags=65, status_items=239, status_r=0xbfdce438) at mail-storage.c:523 #10 0x08064c70 in cmd_select_full (cmd=0x9809730, readonly=false) at cmd-select.c:273 #11 0x080653d9 in cmd_select (cmd=0x9809730) at cmd-select.c:387 #12 0x0806755c in client_command_input (cmd=0x9809730) at client.c:592 #13 0x080675f9 in client_command_input (cmd=0x9809730) at client.c:641 #14 0x08067bfd in client_handle_input (client=0x98094b0) at client.c:682 #15 0x080680b3 in client_input (client=0x98094b0) at client.c:737 #16 0x080f3210 in io_loop_handler_run (ioloop=0x9805ab8) at ioloop-epoll.c:203 #17 0x080f26a0 in io_loop_run (ioloop=0x9805ab8) at ioloop.c:320 #18 0x0806f54d in main (argc=Cannot access memory at address 0x578d ) at main.c:309 --------------------------------------------------------------------- with log message -------------------------------------------------------------------- -Oct 20 15:29:22 vertikal EXT(lars): : Panic: file mail-index-view.c: line 265 (view_lookup_seq_range): assertion failed: (first_uid <= last_uid) Oct 20 15:29:22 vertikal EXT(lars): : Raw backtrace: /tmp/dd/libexec/dovecot/imap [0x80ead11] -> /tmp/dd/libexec/dovecot/imap(i_syslog_fatal_handler+0x34) [0x80eade4] -> /tmp/dd/libexec/dovecot/imap [0x80ea729] -> /tmp/dd/libexec/dovecot/imap [0x80c86b8] -> /tmp/dd/libexec/dovecot/imap(mail_index_lookup_seq_range+0x2c) [0x80c815c] -> /tmp/dd/lib/dovecot/imap/lib20_virtual_plugin.so [0xb7fa64d6] -> /tmp/dd/lib/dovecot/imap/lib20_virtual_plugin.so(virtual_storage_sync_init+0x53f) [0xb7fa738f] -> /tmp/dd/libexec/dovecot/imap(mailbox_sync+0x30) [0x80b0240] -> /tmp/dd/libexec/dovecot/imap(cmd_select_full+0x3d0) [0x8064c70] -> /tmp/dd/libexec/dovecot/imap(cmd_select+0x19) [0x80653d9] -> /tmp/dd/libexec/dovecot/imap [0x806755c] -> /tmp/dd/libexec/dovecot/imap [0x80675f9] -> /tmp/dd/libexec/dovecot/imap(client_handle_input+0x1d) [0x8067bfd] -> /tmp/dd/libexec/dovecot/imap(client_input+0x63) [0x80680b3] -> /tmp/dd/libexec/dovecot/imap(io_loop_handler_run+0xe0) [0x80f3210] -> /tmp/dd/libexec/dovecot/imap(io_loop_run+0x20) --------------------------------------------------------------------- Given that result, I tried adding yet another virtual folder with the same configuration - and it succeeded. Once. A second SELECT gave me yet another backtrace: --------------------------------------------------------------------- % ./sbin/dovecot --exec-mail ext /usr/bin/gdb ./libexec/dovecot/imap GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i486-linux-gnu"... (gdb) r Starting program: /tmp/dd/libexec/dovecot/imap * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT THREAD=REFERENCES MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH SEARCHRES WITHIN CONTEXT=SEARCH] Logged in as lars . SELECT virtual/test2 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft Old) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft Old \*)] Flags permitted. * 73863 EXISTS * 0 RECENT * OK [UNSEEN 10841] First unseen. * OK [UIDVALIDITY 1224509528] UIDs valid * OK [UIDNEXT 73864] Predicted next UID * OK [HIGHESTMODSEQ 1] . OK [READ-WRITE] Select completed. . SELECT virtual/test2 Program received signal SIGABRT, Aborted. 0xb7e0f556 in raise () from /lib/libc.so.6 (gdb) bt full #0 0xb7e0f556 in raise () from /lib/libc.so.6 No symbol table info available. #1 0xb7e10d78 in abort () from /lib/libc.so.6 No symbol table info available. #2 0x080ead25 in default_fatal_finish (type=<value optimized out>, status=0) at failures.c:150 backtrace = 0x8b27838 "/tmp/dd/libexec/dovecot/imap [0x80ead11] -> /tmp/dd/libexec/dovecot/imap(i_syslog_fatal_handler+0x34) [0x80eade4] -> /tmp/dd/libexec/dovecot/imap [0x80ea729] -> /tmp/dd/libexec/dovecot/imap [0x80c86b8"... #3 0x080eade4 in i_syslog_fatal_handler (type=LOG_TYPE_PANIC, status=0, fmt=0x80ffdec "file %s: line %d (%s): assertion failed: (%s)", args=0xbfc57ef4 "\203�020\b\t\001") at failures.c:308 No locals. #4 0x080ea729 in i_panic ( format=0x80ffdec "file %s: line %d (%s): assertion failed: (%s)") at failures.c:197 No locals. #5 0x080c86b8 in view_lookup_seq_range (view=0x8eb77e0, first_uid=1, last_uid=0, first_seq_r=0xbfc58124, last_seq_r=0xbfc58120) at mail-index-view.c:265 __PRETTY_FUNCTION__ = "view_lookup_seq_range" #6 0x080c815c in mail_index_lookup_seq_range (view=0x8eb77e0, first_uid=1, last_uid=0, first_seq_r=0xbfc58124, last_seq_r=0xbfc58120) at mail-index-view.c:530 No locals. #7 0xb7f324d6 in virtual_sync_backend_boxes (ctx=0x90f8eb8) at virtual-sync.c:561 i = 10 #8 0xb7f3338f in virtual_storage_sync_init (box=0x8eba5d0, flags=65) at virtual-sync.c:1194 ret = <value optimized out> #9 0x080b0240 in mailbox_sync (box=0x57a2, flags=65, status_items=239, status_r=0xbfc582c8) at mail-storage.c:523 ctx = (struct mailbox_sync_context *) 0x0 #10 0x08064c70 in cmd_select_full (cmd=0x8b32730, readonly=false) at cmd-select.c:273 client = (struct client *) 0x8b324b0 box = (struct mailbox *) 0x0 ctx = (struct imap_select_context *) 0x8b32778 args = (const struct imap_arg *) 0x8b377b0 mailbox = 0x8b37838 "test2" ret = <value optimized out> __PRETTY_FUNCTION__ = "cmd_select_full" #11 0x080653d9 in cmd_select (cmd=0x8b32730) at cmd-select.c:387 No locals. #12 0x0806755c in client_command_input (cmd=0x8b32730) at client.c:592 client = (struct client *) 0x8b324b0 command = <value optimized out> __PRETTY_FUNCTION__ = "client_command_input" #13 0x080675f9 in client_command_input (cmd=0x8b32730) at client.c:641 client = (struct client *) 0x8b324b0 command = <value optimized out> __PRETTY_FUNCTION__ = "client_command_input" #14 0x08067bfd in client_handle_input (client=0x8b324b0) at client.c:682 _data_stack_cur_id = 3 ret = <value optimized out> remove_io = <value optimized out> handled_commands = false #15 0x080680b3 in client_input (client=0x8b324b0) at client.c:737 cmd = <value optimized out> output = (struct ostream *) 0x8b3265c bytes = <value optimized out> __PRETTY_FUNCTION__ = "client_input" #16 0x080f3210 in io_loop_handler_run (ioloop=0x8b2eab8) at ioloop-epoll.c:203 ctx = (struct ioloop_handler_context *) 0x8b2ebb0 event = (const struct epoll_event *) 0x8b2ebf0 list = (struct io_list *) 0x8b326d8 io = (struct io_file *) 0x8b326b8 tv = {tv_sec = 1799, tv_usec = 995613} t_id = 2 msecs = <value optimized out> ret = 1 i = 0 j = 0 call = <value optimized out> #17 0x080f26a0 in io_loop_run (ioloop=0x8b2eab8) at ioloop.c:320 No locals. #18 0x0806f54d in main (argc=Cannot access memory at address 0x57a2 ) at main.c:309 No locals. --------------------------------------------------------------------- Oct 20 15:33:31 vertikal EXT(lars): : Panic: file mail-index-view.c: line 265 (view_lookup_seq_range): assertion failed: (first_uid <= last_uid) Oct 20 15:33:31 vertikal EXT(lars): : Raw backtrace: /tmp/dd/libexec/dovecot/imap [0x80ead11] -> /tmp/dd/libexec/dovecot/imap(i_syslog_fatal_handler+0x34) [0x80eade4] -> /tmp/dd/libexec/dovecot/imap [0x80ea729] -> /tmp/dd/libexec/dovecot/imap [0x80c86b8] -> /tmp/dd/libexec/dovecot/imap(mail_index_lookup_seq_range+0x2c) [0x80c815c] -> /tmp/dd/lib/dovecot/imap/lib20_virtual_plugin.so [0xb7f324d6] -> /tmp/dd/lib/dovecot/imap/lib20_virtual_plugin.so(virtual_storage_sync_init+0x53f) [0xb7f3338f] -> /tmp/dd/libexec/dovecot/imap(mailbox_sync+0x30) [0x80b0240] -> /tmp/dd/libexec/dovecot/imap(cmd_select_full+0x3d0) [0x8064c70] -> /tmp/dd/libexec/dovecot/imap(cmd_select+0x19) [0x80653d9] -> /tmp/dd/libexec/dovecot/imap [0x806755c] -> /tmp/dd/libexec/dovecot/imap [0x80675f9] -> /tmp/dd/libexec/dovecot/imap(client_handle_input+0x1d) [0x8067bfd] -> /tmp/dd/libexec/dovecot/imap(client_input+0x63) [0x80680b3] -> /tmp/dd/libexec/dovecot/imap(io_loop_handler_run+0xe0) [0x80f3210] -> /tmp/dd/libexec/dovecot/imap(io_loop_run+0x20) --------------------------------------------------------------------- Configuration was: --------------------------------------------------------------------- % ./sbin/dovecot -n # 1.2.alpha2: /tmp/dd/etc/dovecot.conf listen: 127.0.0.1 ssl_disable: yes login_dir: /tmp/dd/var/run/dovecot/login login_executable: /tmp/dd/libexec/dovecot/imap-login mail_plugins: fts fts_squat virtual zlib namespace: type: private separator: / location: maildir:~/Mailbox/Maildir inbox: yes list: yes subscriptions: yes namespace: type: private separator: / prefix: mbox/ location: mbox:~/Mailbox/mbox/ list: yes subscriptions: yes namespace: type: private separator: / prefix: virtual/ location: virtual:~/Mailbox/virtual list: yes subscriptions: yes auth default: passdb: driver: pam userdb: driver: passwd --------------------------------------------------------------------- System is Linux/i386. I tried narrowing down the problem to a specific mail folder, but did not succeed, it seems I need to give a number of folders for this problem to occur. The SIGABRT kind of crash occured a lot more often. On an unrelated note, given the above configuration file, using a dovecot-virtual file like | mbox/* | all causes dovecot to complain: Oct 20 13:56:59 vertikal EXT(lars): : Connection closed bytes=22/350 Oct 20 13:57:03 vertikal EXT(lars): : /home/lars/Mailbox/virtual/test/dovecot-virtual: No mailboxes defined Greetings, Lars.

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[Dovecot] dovecot 1.1.5 mbox bug (From_-line separator related)
by Anton Yuzhaninov 30 Oct '08

30 Oct '08

If I send mail with content like this: From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 and instead single messages created many messages. Inside mbox file it looks like real_message_headers Status: O X-Keywords: Content-Length: 2859 X-UID: 1471 From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 X-UID: 1472 Status: O From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 X-UID: 1473 Status: O From <test.dovecot(a)m.box> Wed Jan 09 01:33:55 2008 X-UID: 1474 Status: O Yes, Content-Length headers present, but: 1. Why X-UID: and Status: headers inserted into message body? 2. Why IMAP client (thunderbird) show many empty messages instead single message? Mbox related settings from dovecot -n is only: mmap_disable: yes mbox_write_locks: fcntl mbox_min_index_size: 1024 To store messages used dovecot deliver. -- WBR, Anton Yuzhaninov

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[Dovecot] mail_executable's process environment
by Mike Malsman 30 Oct '08

30 Oct '08

Hello, I recently had to get Dovecot 1.1.4 to write to a "pop3/imap-before- smtp" db such that my MTA could permit relay after a successful authentication with Dovecot. The 'pop3' and 'imap' processes are executed only after a successful auth, so replacing them with wrappers which write to the db seemed the natural choice. Lo and behold, someone thought of something like this, as the 'mail_executable' directive exists - neat. Upon inspection of the processes' environment I'm pleased to see that there's a load of useful information in there. However, one essential component in my case is the destination network address, which is missing. I added it with the attached patch, exposed as 'LOCAL_IP'. Works for me. Is this something that would be useful to anyone else? -Mike

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[Dovecot] [dovecot] Enable logging of all client commands in dovecot-1.2.alpha3
by Jonathan Siegle 30 Oct '08

30 Oct '08

Hello, I would like to log all IMAP client commands sent to dovecot. The format would be time pid command arguments. I reviewed http://wiki.dovecot.org/Logging and started digging through dovecot-1.2.alpha3/src/master . I don't need this turned on all the time, just enough to see how clients do things and I don't need to see passwords. Any tips would be appreciated. -Jonathan

2 1

[Dovecot] benchmark dovecot
by Mathieu Kretchner 30 Oct '08

30 Oct '08

Hello, We would like to do a feed back to this active mailing list. We are working on a migration project from cyrus to dovecot. And we have just completed the benchmark sequence. As I say, this benchmark is here only to show that our old imap server is out to date. I would not be the source of controversy at all, so I try to explain my approach. Because the only thing I found was this old oriented benchmark : http://www.isode.com/whitepapers/mbox-benchmark.html We've tried to do our tests, here you could find our results : http://www-sop.inria.fr/members/Mathieu.Kretchner/dotclear/index.php/2008/1…

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[Dovecot] Enh-Req: Mark As Read When Delivered
by Neil 30 Oct '08

30 Oct '08

I'm under the impression bug-reports are supposed to go to the list, so hopefully it's okay if I put in a feature request here too (assuming it's not already implemented; but it doesn't look like it). Basically, all I would like to do is be able to sometimes deliver mail as already mail into mail boxes. Is there some way to do this? If not, could a flag perhaps be added to deliver to do it? (And Sieve; but for now I think procmail still has much higher adoption, and thus having it in deliver would be rather key...) Thanks, -Neil.

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[Dovecot] INBOX stored in AFS
by Hans-Werner Paulsen 30 Oct '08

30 Oct '08

Hello, currently we are storing the incoming mail in the user's home directory, which is within a distributed filesystem called AFS (OpenAFS). Accessing the "mbox" file directly (using the distributed filesystem) works fine with mutt, thunderbird, ... To access the INBOX from a machine, which does not have access to this distributed filesystem, we are using IMAP (UW-imap). Now I wanted to check if dovecot can do the job (maybe faster than UW), and I had the following problem: This is my configuration: ------------------------------------------------------------------------------- # 1.1.4: /opt/dovecot-1.1.4/etc/dovecot.conf log_path: /var/log/dovecot ssl_cert_file: /etc/ssl/certs/imapd.pem ssl_key_file: /etc/ssl/keys/imapd.pem login_dir: /var/run/dovecot/login login_executable: /opt/dovecot-1.1.4/libexec/dovecot/imap-login first_valid_uid: 100 mail_location: mbox:~/Mail:INBOX=~/.maildir/incoming mail_debug: yes mmap_disable: yes mail_nfs_storage: yes mail_nfs_index: yes mbox_write_locks: fcntl mbox_dirty_syncs: no mbox_lazy_writes: no mail_executable: /opt/dovecot-1.1.4/libexec/dovecot/afs-token /opt/dovecot-1.1.4/libexec/dovecot/imap auth default: verbose: yes debug: yes passdb: driver: pam args: setcred=yes session=yes dovecot userdb: driver: passwd ------------------------------------------------------------------------------- When I start my imap-client, I see the content of the INBOX, and I can read, delete, ... the different entries. But when new mail arrives dovecot (and my imap-client) will never notice this. And when I quit my imap-client the dovecot imap server will write back its view of the INBOX, and delete this new mail. This seems to be a problem related to AFS. I poked in the dovecot code and have the following theory: dovecot opens the INBOX R/W, dovecot calls "stat" on the INBOX file periodically to look for modifications. But this does not work, because this machine will stat the local copy (AFS cache) of the INBOX as long as this file is still open R/W. My questions: Is it possible to have a configuration, that the INBOX file is not left open when stat-ing this file? Or is it possible to open the INBOX file R/W only when it us locked? Or is it necessary to modify the code? Thank you for any help, HW -- Hans-Werner Paulsen hans(a)MPA-Garching.MPG.DE MPI für Astrophysik Tel 089-30000-2602 Karl-Schwarzschild-Str. 1 Fax 089-30000-2235 D-85741 Garching

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