- dovecot - dovecot.org

[Dovecot] Help configuring dovecot for SSL
by Knute Johnson 04 May '05

04 May '05

Hi: I'm running dovecot on a Fedora 3 box and would like to be able to make a TLS connection to it with my Pegasus Mail program running on my Winblows machine. Does anybody know if it is possible? If it is I could really use some help configuring my dovecot. I have tried for several days but I really don't know what I'm doing and need a direction to start. Thanks, -- Knute Johnson Molon Labe...

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[Dovecot] Multiple Logins - Single Mail Account
by Net Cerebrum 04 May '05

04 May '05

I have a mail account which needs to be accessed by 4-5 people simultaneously through IMAP. As of now I have configured it on the respective clients using the same username and password so we have multiple people accessing the same account through their mail clients simultaneously and it is working flawlessly. Is this alright or can it lead to some problems or corruption of data later ? What is the best way to allow multiple people to access a single mailbox for read as well as write operations ? Thanks,

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[Dovecot] Segfault in imap
by Todd Burroughs 04 May '05

04 May '05

I'm running the current CVS version, as of April 26. There have been a few of these with the same problem. There was a NULL pointer dereference at mail-index-view.c:603 view->map == NULL Here's the log entry, etc. dovecot: May 03 08:30:08 Error: 10195 IMAP(support): UIDVALIDITY changed (1115122813 -> 1115123383) in mbox file /mailhome/new/m/2/support/mbox dovecot: May 03 08:30:13 Error: child 10195 (imap) killed with signal 11 Core was generated by `imap'. Program terminated with signal 11, Segmentation fault. (gdb) bt full #0 mail_index_view_open (index=0x80c2fc0) at mail-index-view.c:603 view = (struct mail_index_view *) 0x80c5608 #1 0x08077ccd in index_storage_mailbox_init (ibox=0x80c3bc8, index=0x80c2fc0, name=0x80a6cfe "INBOX", flags=Variable "flags" is not available. ) at index-storage.c:345 storage = Variable "storage" is not available. (gdb) bt #0 mail_index_view_open (index=0x80c2fc0) at mail-index-view.c:603 #1 0x08077ccd in index_storage_mailbox_init (ibox=0x80c3bc8, index=0x80c2fc0, name=0x80a6cfe "INBOX", flags=Variable "flags" is not available. ) at index-storage.c:345 #2 0x080679c2 in mbox_alloc (storage=0x80bc788, index=0x80c2fc0, name=0x80a6cfe "INBOX", flags=0) at mbox-storage.c:500 #3 0x080684e0 in mbox_open (storage=0x80bc788, name=0x80a6cfe "INBOX", flags=0) at mbox-storage.c:545 #4 0x0806863f in mbox_mailbox_open (_storage=0x80bc788, name=0x80a6cfe "INBOX", input=0x0, flags=0) at mbox-storage.c:603 #5 0x0808ce88 in mailbox_open (storage=0x0, name=0x80a6cfe "INBOX", input=0x0, flags=0) at mail-storage.c:295 #6 0x08057f9f in _cmd_select_full (cmd=0x80bcb98, readonly=0) at cmd-select.c:32 #7 0x08058171 in cmd_select (cmd=0x80bcb98) at cmd-select.c:97 #8 0x08059635 in _client_input (context=0x80bcb58) at client.c:334 #9 0x0809e04a in io_loop_handler_run (ioloop=0x80bb9b0) at ioloop-poll.c:184 #10 0x0809d769 in io_loop_run (ioloop=0x80bb9b0) at ioloop.c:218 #11 0x08060537 in main (argc=1, argv=0xbffffa44, envp=0xbffffa4c) at main.c:228 (gdb) p view->map $1 = (struct mail_index_map *) 0x0 (gdb) p index->map $2 = (struct mail_index_map *) 0x0 (gdb) p index->indexid $3 = 0

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[Dovecot] Error in rename uidlist while fetching through pop3
by James Berry 03 May '05

03 May '05

My dovecot server seems to randomly begin giving errors to pop3 users who try to fetch their email. Once this begins, they see no more new mail, though the mail is in cur. Running: dovecot-stable 20050501, Mac OS X 10.3.9 Log entries like this: May 2 19:35:18 caddy dovecot: pop3-login: Login: kim [24.22.16.169] May 2 19:35:18 caddy dovecot: POP3(kim): rename(/Users/kim/Maildir/ dovecot-uidlist.lock, /Users/kim/Maildir/dovecot-uidlist) failed: Input/output error May 2 19:35:18 caddy dovecot: POP3(kim): file_dotlock_replace(/Users/ kim/Maildir/dovecot-uidlist) failed: Input/output error Is this a known problem, and/or is there a known way to recover from such a situation? I'm managed to throw out the uidlist, but that means they get a whole dump of new mail. -jdb

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[Dovecot] How to try dovecot-lda
by Joakim Verona 02 May '05

02 May '05

Hello, I'm interested in trying the dovecot-lda with sieve support. What would be the proper way to test it? I'm currently using a Fedore core 2 server, with spamassassin and procmail. To get the same effect with dovecot-lda, would I put a line like this in my .forward? spamassassin|dovecot-lda I'm just guessing, so please correct me if im wrong. Im thinking of setting up a separate mail account and copy my mail there to test the ported procmail to sieve recipies also. -- Joakim Verona www.verona.se

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[Dovecot] disabling indexes?
by Marten Lehmann 02 May '05

02 May '05

Hello, I recently had the problem, that an index was corrupt. Thus, messages haven't been listed (talking about POP3), but still remained in the filesystem. As there is no SEARCH-command in POP3, dovecot didn't notice that the index is corrupt and didn't rebuild it. The problem is, that a user can't delete messages through POP3 which aren't listed by dovecot. If the maildir size increases, the arrival of new messages will be blocked because the mailbox is full. And the user has no chance to delete it. Regards Marten

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[Dovecot] Blank lines in mailboxes
by Jakob Curdes 30 Apr '05

30 Apr '05

Hello, we use dovecot on a regular basis. Sometimes I end up with a user telling me he does not get mail. When I look after the problem, I always find leading blank lines in the mbox file. We are using postfix with dovecot and amavisd as spam scanner. Amavisd never accesses the mbox files directly so this can be ruled out. I suspected procmail but now it happened also with accounts where no procmail is active. I found only a list thread where this happened always, i.e. it was a configuration error. (Meaning the mailbox was correct but dovecot would not read it). Here ist is only occasionally and therefore hard to track . Does anybody have the same problem or has hints to a solution ? We are running postfix 2.1.4 and dc 0.99.10.6 ; just now I am upgrading to pf 2.2.2. and dc 0.99.14. Yours, Jakob Curdes

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[Dovecot] Fresh Dovecot Install
by GPL 29 Apr '05

29 Apr '05

Working on an RH9 box. Did not use yum. Downloaded the "dovecot-stable-latest.tar.gz". Uncompressed it, downloaded and installed gcc. Ran the following: ./configure make sudo make install Seemed to have done its thing. I'll admit I am not well versed in using "make" or compiling anything. When I install I usually use yum on fedora machines. This one being an RH9 machine I have plugged yum into the fedora legacy project and it did not let me install dovecot via yum. So I opted for this route. Regardless, if I run 'which dovecot' I see "/usr/local/sbin/dovecot" However now I do not seem to be able to see it run. I get nothing when I: rpm -qa | grep dovecot ps aux | grep dovecot service dovecot status SO AM HAVE MISSED SOMETHING! Is there another script I need to run? Suggestions welcome. Thanks, George

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[Dovecot] error: received another "not listening" notification
by Andreas Goertz 29 Apr '05

29 Apr '05

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, i got a problem with dovecot 0.99.14 - after a while of checking pop3 periodically, the dovecot-auth process gets killed. Some clients, e.g. outlook (express), then requests for reentering the password. When this happens, i see something like this in th elogs: Apr 28 14:53:45 marge dovecot: child 25819 (auth) killed with signal 4 Apr 28 14:55:09 marge dovecot: login: received another "not listening" notification (if you can't login at all, see src/lib/fdpass.c) Any idea, how to solve this? Thanks in advance, Andreas Goertz. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCcOjTpAOZWzj6viQRAtz+AKCjfTe3ib3tsBUeqZjTuLY/hcJ2mACgqePc /T4TGvBNzmY0snTpOMHuUdE= =t5Ev -----END PGP SIGNATURE-----

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[Dovecot] dovecot 0.99.xx to 1.0-stable how-to?
by Rich West 28 Apr '05

28 Apr '05

I realize that there have been some big changes in features and configuration file settings between 0.99.xx and 1.0-stable, so when I went to perform an upgrade on our testing server, I carefully combed through the configuration files and matched up everything I could. I fired up dovecot-1.0-stable and was pleased to see that it was happily running. I attempted to connect to it, and discovered that it wasn't listening to any ports.. then I realized that the app had crashed due to a typo in the config file (oops). Fixed that, started it up, and it was happily running and listening. However, it wouldn't authenticate any users.. Backing down to the 0.99.14 version that we had installed allowed for authentication (against ldap) to work just fine.. Is there anything that I should be looking for within the dovecot-1.0-stable that is dramatically different in regards to user authentication? -Rich

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[Dovecot] Root uid
by Chris L. Franklin 28 Apr '05

28 Apr '05

Whats the easy'est way to mod the source to allow the statis uid and or gid or of the users be root ? PS. I do wish this was an admin set-able option in the dovecot.conf -- Chris L. Franklin --

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Re: [Dovecot] Root uid
by Curtis Maloney 28 Apr '05

28 Apr '05

Chris L. Franklin wrote: >> Honestly, why do you want it to be root? It's NOT a good idea, even >> though Dovecot has so far shown to be very secure. > > > I disagree, strongly To which statement? That using root is not a good idea, or that Dovecot has shown to be secure? >> I thought the only thing stopping this (apart from good sense) is the >> minimum UID setting in the config file? > > Nope it's in the source to disallow it Oh, ok. Well, I'm not surprised. It's generally considered a bad practice. > PS. On the good sense part, It's way I use SELinux. I could just hand > out root's login on my box and not worry. > From what I understand, SELinux is a special case. What I've been told of it, it's an interesting idea, with much merit. I don't know enough to say either way. Maybe I'll take a closer look after I've finished delving into Sun's RBAC. As for the code changes, from memory the UID checking stuff is all in the one place ( in 0.99.14 it seems to be src/lib/restrict-access.c ). I'm not sure about 1.0... we'll move to that when we can have custom flags :) -- Curtis

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[Dovecot] Assertion Failures in Current CVS version
by Todd Burroughs 28 Apr '05

28 Apr '05

I've attached a few assertion errors in imap. Any fixes or advice on where to look are appreciated. This is with the CVS version, current as of April 27. Todd Burroughs

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[Dovecot] cutting everything after @
by Juraj Bednar 27 Apr '05

27 Apr '05

Hello, I am migrating one server to dovecot. The only problem is, that users have logins with @domain as part of their user name. I want to use pam auth (for other reasons, if only for dovecot, I would use mysql, but I need the same password db to be used for other services, like samba). Is there a way to allow this type of login? Just cut everything beginning with @. I can change the source code, but then I don't get nice automatic upgrades. Or can this be done easily with PAM? Thanks, Juraj.

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[Dovecot] Shared mailboxes and accessing MailDir not through IMAP
by Steffen Kaiser 27 Apr '05

27 Apr '05

Hello, I'm testing Dovecot that is part of Debian/sarge (v0.99.14-1). So far so good. I have migrated some mailboxes for testing with success and seems that everything works fine. One thing I do not figure out is, what to do about shared mailboxes, which are the very reason of searching for an alternative IMAP server, The Wiki states that there is some sort of shared mailboxes, based upon symlinks. Well, but since which version actually?? The Changelog stops at 2003-11-08 21:12 ? What I need is a mailbox (maildir) for a contact address (not a real shared mailbox, but several users shall be able to read a mail and delete it after processing). For this, one needs write permission to the mails therein only, the MDA takes care of to make the mails readable for the group. It would be good to see, if somebody had answered a mail already, but that's not required. What I tried is this: I setup all Unix-permissions of the folders (. cur new tmp: u=rwx,g=srwx) and their parents (u=rwx,g=x). Then I placed a symlink into the maildir of all users. Each user caches the INDEXes into an individual /var/ directory, not in the maildirs themselves. (BTW: I wonder why I need to give the group write permission to the base directory '.'). The mailbox shows up and is read-write. Now I wonder, what impact I'm to expect here? Esp. "The only problem is that currently everyone's message flags would be shared as well." (quote from a message of a thread taken from the Wiki) Then there is http://dovecot.org/pipermail/dovecot/2003-March/001113.html the third item will apply to my situation, I guess. MailDir is (sort of) expected to be read by mutt directly, for instance. Because the mailboxes are located within the users home directories, some of them do this. Do this item mean that Dovecot is NOT expecting that mails are deleted in any other way than through itself? Otherwise Dovecot would find a change in the mailbox and rebuilt the index file regardless whether the change had been originated by another IMAP client or by directly manipulating the maildir. Bye, -- Steffen Kaiser

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[Dovecot] local users + virtual domains
by Micha Silver 27 Apr '05

27 Apr '05

I'm redesigning our mail server which holds several hundred mailboxes - most are local system users and some are virtual domains that we host. I understand that the 1.0x stable release allows for multiple auth mechinisms, so that I could use both PAM for local users and a passwd-file for the virtuals. If I want to stick with 0.99x can I mix and match in a single passwd-file the username/passwd for both local and virtual users? In dovecot.conf I'd have something like: default_mail_env = maildir:%h/Maildir auth-userdb = /etc/dovecot/passwd-file auth-passdb = /etc/dovecot/passwd-file then in passwd-file I'd enter: # local users localuser1:<passwd>:501:501::::: localuser2:<passwd>:502:502::::: ... #virtual domains virt1(a)example1.com:<passwd>:5001:5001::/var/vmail/%d/%u:/bin/false::INBOX=/var/vmail/%d/%u/Maildir postmaster(a)example1.com:<passwd>:5001:5001::/var/vmail/%d/%u:/bin/false::INBOX=/var/vmail/%d/%u/Maildir virt1(a)example2.com:<passwd>:5001:5001::/var/vmail/%d/%u:/bin/false::INBOX=/var/vmail/%d/%u/Maildir postmaster(a)example2.com:<passwd>:5001:5001::/var/vmail/%d/%u:/bin/false::INBOX=/var/vmail/%d/%u/Maildir ... Would this combination work? Thanks, Micha

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[Dovecot] dovecot stopping - no messages
by Nigel Allen 27 Apr '05

27 Apr '05

Greetings Running Fedora Core 3 and dovecot-0.99.13-3.FC3 as a production mail server for around 30+ accounts. A couple of times a day dovecot just stops. Nothing in the mail log except for Apr 26 00:48:19 sydsrv05 imap-login: Can't connect to auth process at default: Connection refused It's got to the point that I have put a script into cron.hourly to restart the dovecot service every hour. Any suggestions where to start looking please? Rgds Nigel -- Nigel Allen, Snr Consultant, ProSmart Consulting Australia 48 Tiarri Avenue, Terrey Hills, NSW 2084, Australia Tel: +61 2 9450 2690 Fax: +61 2 9450 2691 Mob: +61 4 1494 5269 http://www.prosmart.com.au

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Re: [Dovecot] docecot and procmail?
by Todd Burroughs 27 Apr '05

27 Apr '05

On Tue, 26 Apr 2005, Dan Stromberg wrote: > Is dovecot still considered unreliable when combined with NFS? I've been using the test releases and lately the current CVS release over NFS. We're using procmail to deliver mail and dovecot as the imap server. Imap access is sometimes through UW-imap on the same mailboxes. We keep the index files on the NFS server and are using mbox format. I am only running this on one server at this point, so you could see other problems if it is run on multiple servers. Procmail is run on several servers. We're probably testing around 50 mailboxes, some quite large. I haven't seen any corruption of the mboxes and some of them get hit pretty hard. >From my experience, I wouldn't call it "unreliable". I have this setting in the config: mmap_disable = yes I haven't tried using mmap yet... The server is Linux, kernel 2.6.x and the NFS server is a NetApp. Make sure that NFS locking is working. Todd

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[Dovecot] Problem with users home...
by websafe 27 Apr '05

27 Apr '05

Hi :) I hope this short example shows what problem I have: # returns users homedir from /etc/passwd grep user1 /etc/passwd | cut -d':' -f6 # result: /home/group-subdir/user1 And the logfile... #maillog imap-login: Login: user1 [192.168.0.253] imap(user1): mkdir(/home/user1/Maildir/.Trash) failed: No such file or directory Why Dovecot tries to create /home/user1/Maildir/.Trash and NOT /home/group-subdir/user1/Maildir/.Trash as in /etc/passwd ??? Is there any solution? I'm running 0.99.14 # cat /etc/dovecot.conf ssl_disable = yes disable_plaintext_auth = no login = imap verbose_proctitle = yes default_mail_env = maildir:/home/%u/Maildir auth = default auth_mechanisms = plain auth_userdb = passwd /etc/passwd auth_passdb = shadow /etc/shadow auth_user = root Thanks in advance, -- websafe

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[Dovecot] Mozilla Thunderbird 1.0 and Dovecot/IMAP problem.
by websafe 27 Apr '05

27 Apr '05

If you notice problems with your imap folders and "Lost transaction logfile" when connecting Dovecot (0.99 / 1.0-testXX) via IMAP, upgrade to Thunderbird 1.02. This should help. -- websafe

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[Dovecot] Track when user last checked mail
by Del Stoliker 27 Apr '05

27 Apr '05

First off I've just got to say thanks. We just upgraded from UW to Dovecot migrating from mbox to maildir. Wow, what a difference! Load average used to hang around 5.0 during business hours and could get up to 20+ on a bad day. Now we rarely break 1.0! I'm wondering if there's a way to keep track of the last time a user checked their email and whether they checked it using POP or IMAP. We're trying to gather statistics on what protocols our users use and find accounts that haven't been checked for a long time. We used to be able to do some of this with the finger command and the user's mbox. I found a script called "mfinger" that works better with Maildir, but it's designed for Courier. Any ideas? Thanks!

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[Dovecot] docecot and procmail?
by Dan Stromberg 27 Apr '05

27 Apr '05

Is dovecot still considered unreliable when combined with NFS? Is this true for mbox only, or Maildir as well? If dovecot Is still considered unreliable with NFS, how about having a dovecot mode that would chain into procmail for delivery, so that dovecot doesn't (necessarily) have to reinvent that wheel? Thanks!

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[Dovecot] Why is "UIDVALIDITY changed" fatal?
by Chris Wakelin 27 Apr '05

27 Apr '05

I've got several users testing Dovecot IMAP at the moment, but some of them are also accessing their mail via UW-IMAP at other times. (I've warned them about accessing the same folder simultaneously via UW-IMAP and Dovecot!) In addition, we have special folders "AutoSpam" and "Trash" that pruned using Washington's "mailutil" automatically every so often. Of course, Dovecot's indexes will become invalid in such cases, but they seem to get rebuilt automatically OK. However, in some cases UW-IMAP seems to change the UIDVALIDITY value (not sure why!) and when Dovecot tries to sync it notices this and gives up with a fatal error on opening that folder. Opening the folder a second time is then OK. I was wondering why Dovecot can't just rebuild the indexes silently in such cases (which seems to be done by returning "0" from the mbox_sync_loop() routine)? Best Wishes, Chris --+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+-- Christopher Wakelin, c.d.wakelin(a)reading.ac.uk IT Services Centre, The University of Reading, Tel: +44 (0)118 378 8439 Whiteknights, Reading, RG6 2AF, UK Fax: +44 (0)118 975 3094

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[Dovecot] Basic configuration problem "not a directory"
by Einar Flesaker 26 Apr '05

26 Apr '05

Hi, I've been struggling with getting dovecot up and running the last hour, but I seem to be stuck. When logging in (which I can do successfully) my connection is dropped, and the following is outputted to my dovecot log: dovecot: Apr 26 09:56:52 Fatal: chdir(/bin/false) failed with uid 513: Not a directory dovecot: Apr 26 09:56:52 Error: child 27345 (imap) returned error 89 .. But I'm certain the relevant directories exist. Relevant configuration details are as follows: * [dovecot.conf] valid_chroot_dirs = /var/spool/vmail default_mail_env = maildir:/var/spool/vmail/$d/%n/ * [passwd sample] einar@domain.com::513:513:/var/spool/vmail/domain.com/:/bin/false:: * [directory listing] [root@server einar]# pwd /var/spool/vmail/domain.com/einar [root@server einar]# ls -l totalt 12 drwx------ 2 virtmail virtmail 4096 apr 26 07:27 cur drwx------ 2 virtmail virtmail 4096 apr 26 08:48 new drwx------ 2 virtmail virtmail 4096 apr 26 08:48 tmp I'd be very grateful for any assistance, any ideas of what might be wrong. Is there any easy way to see the relevant directory that /bin/false exits on? -Einar-

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[Dovecot] many instances om imap and imap-login
by Jon 26 Apr '05

26 Apr '05

Hi, Im using dovecote as my IMAP interface. However i do have a lot of imap instances. its only 7 user using the system as i get this. please advice. 1230 ? S 0:00 imap-login 1309 ? S 0:00 imap-login 1387 ? S 0:00 imap-login 1388 ? S 0:00 imap-login 1389 ? S 0:00 imap-login 1390 ? S 0:00 imap-login 1391 ? S 0:00 imap-login 1399 ? S 0:00 imap 1400 ? S 0:00 imap 1401 ? S 0:00 imap 1402 ? S 0:00 imap 1406 ? S 0:00 imap 1442 ? S 0:00 imap 1636 ? S 0:00 imap 1637 ? S 0:00 imap-login 1638 ? S 0:00 imap-login 1640 ? S 0:00 imap 1683 ? S 0:00 imap-login 1684 ? S 0:00 imap-login 1685 ? S 0:00 imap-login 1686 ? S 0:00 imap-login 1687 ? S 0:00 imap-login 1689 ? S 0:00 imap-login 1692 ? S 0:00 imap 1693 ? S 0:00 imap 1697 ? S 0:00 imap 1698 ? S 0:00 imap 1699 ? S 0:00 imap 1701 ? S 0:00 imap 1914 ? S 0:00 imap 1916 ? S 0:00 imap 1965 ? S 0:00 imap-login 1968 ? S 0:00 imap 1969 ? S 0:00 imap 1971 ? S 0:00 imap-login 1974 ? S 0:00 imap-login 1980 ? S 0:00 imap-login 1981 ? S 0:00 imap-login 2068 ? S 0:00 imap 2069 ? S 0:00 imap 2071 ? S 0:00 imap 2072 ? S 0:00 imap-login 2079 ? S 0:00 imap 2157 ? S 0:00 imap-login 2158 ? S 0:00 imap-login 2159 ? S 0:00 imap-login 2160 ? S 0:00 imap-login 2161 ? S 0:00 imap-login 2162 ? S 0:00 imap-login 2332 ? S 0:00 imap 2337 ? S 0:00 imap 2338 ? S 0:00 imap 2339 ? S 0:00 imap 2340 ? S 0:00 imap 2341 ? S 0:00 imap-login 2342 ? S 0:00 imap-login 2386 ? S 0:00 imap 2387 ? S 0:00 imap-login 3095 ? S 0:00 imap 3096 ? S 0:00 imap-login /jon

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