- dovecot - dovecot.org

[Dovecot] crashes on 2.0.16
by Cor Bosman 31 Dec '11

31 Dec '11

Hey all, I upgraded some servers today from Debian Lenny to Debian Squeeze, and after the upgrade I started getting dovecot crashes. I was on 2.0.13 but got these there as well, and hoped upgrading to 2.0.16 would help. It didn't. Anyone have an idea? Cor Dec 18 23:32:21 userimap1 kernel: [263492.245530] __ratelimit: 122 callbacks suppressed Dec 18 23:32:21 userimap1 kernel: [263492.245536] imap[19665]: segfault at 7f108efb7f60 ip 00007f108ecd37e0 sp 00007fff73c3d658 error 5 in libc-2.11.2.so[7f108ec5d000+158000] Dec 18 23:32:21 userimap1 kernel: [263492.245663] BUG: Bad page map in process imap pte:00000001 pmd:09767067 Dec 18 23:32:21 userimap1 kernel: [263492.252563] page:ffffea0000000000 flags:(null) count:-84 mapcount:-84 mapping:(null) index:0 Dec 18 23:32:21 userimap1 kernel: [263492.261186] addr:00007f108ef46000 vm_flags:08000070 anon_vma:(null) mapping:ffff88012b6e5238 index:2e9 Dec 18 23:32:21 userimap1 kernel: [263492.270804] vma->vm_ops->fault: filemap_fault+0x0/0x460 Dec 18 23:32:21 userimap1 kernel: [263492.276172] vma->vm_file->f_op->mmap: generic_file_mmap+0x0/0x60 Dec 18 23:32:21 userimap1 kernel: [263492.282424] Pid: 19665, comm: imap Tainted: G B 2.6.32.36-xsserver #1 Dec 18 23:32:21 userimap1 kernel: [263492.282429] Call Trace: Dec 18 23:32:21 userimap1 kernel: [263492.282441] [<ffffffff81103ee5>] print_bad_pte+0x1d5/0x280 Dec 18 23:32:21 userimap1 kernel: [263492.282448] [<ffffffff8110568a>] unmap_vmas+0xa1a/0xa20 Dec 18 23:32:21 userimap1 kernel: [263492.282458] [<ffffffff8137e501>] ? sch_direct_xmit+0x81/0x1d0 Dec 18 23:32:21 userimap1 kernel: [263492.282465] [<ffffffff8110b60d>] exit_mmap+0xbd/0x190 Dec 18 23:32:21 userimap1 kernel: [263492.282473] [<ffffffff81059cbd>] mmput+0x4d/0x120 Dec 18 23:32:21 userimap1 kernel: [263492.282481] [<ffffffff8105f282>] exit_mm+0x112/0x150 Dec 18 23:32:21 userimap1 kernel: [263492.282488] [<ffffffff8106104d>] do_exit+0x13d/0x800 Dec 18 23:32:21 userimap1 kernel: [263492.282496] [<ffffffff81072f31>] ? __dequeue_signal+0xe1/0x200 Dec 18 23:32:21 userimap1 kernel: [263492.282503] [<ffffffff81061765>] do_group_exit+0x55/0xd0 Dec 18 23:32:21 userimap1 kernel: [263492.282510] [<ffffffff81075251>] get_signal_to_deliver+0x1e1/0x3e0 Dec 18 23:32:21 userimap1 kernel: [263492.282517] [<ffffffff8100b315>] do_signal+0x75/0x7d0 Dec 18 23:32:21 userimap1 kernel: [263492.282523] [<ffffffff81103203>] ? print_vma_addr+0xb3/0x120 Dec 18 23:32:21 userimap1 kernel: [263492.282533] [<ffffffff8143856e>] ? printk+0x41/0x43 Dec 18 23:32:21 userimap1 kernel: [263492.282541] [<ffffffff81036436>] ? __bad_area_nosemaphore+0xf6/0x1e0 Dec 18 23:32:21 userimap1 kernel: [263492.282547] [<ffffffff810365ee>] ? bad_area_access_error+0x4e/0x60 Dec 18 23:32:21 userimap1 kernel: [263492.282553] [<ffffffff8100bac7>] do_notify_resume+0x57/0x60 Dec 18 23:32:21 userimap1 kernel: [263492.282559] [<ffffffff8100cadc>] retint_signal+0x48/0x8c # 2.0.16: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 2.6.32.36-xsserver x86_64 Debian 6.0.3 auth_cache_size = 1 M auth_verbose = yes base_dir = /var/run/dovecot/ default_vsz_limit = 2 G disable_plaintext_auth = no first_valid_uid = 20 lock_method = dotlock login_greeting = User-IMAP ready. login_trusted_networks = 194.109.26.128/27 mail_fsync = always mail_nfs_index = yes mail_nfs_storage = yes mailbox_idle_check_interval = 1 mins maildir_stat_dirs = yes mmap_disable = yes namespace { inbox = yes location = maildir:%Nu:INDEX=/var/spool/mail/dovecot-control/indexes/%1u/%2u/%u:INBOX=%Nu:CONTROL=/var/spool/mail/dovecot-control/%1u/%2u/%u/INBOX prefix = separator = / type = private } passdb { args = /usr/local/etc/dovecot/dovecot.masterusers driver = passwd-file master = yes } passdb { args = cache_key=%u%r dovecot driver = pam } plugin { quota = fs:User quota } protocols = imap service auth { client_limit = 5000 } service imap-login { process_min_avail = 8 service_count = 0 vsz_limit = 2 G } service imap { process_limit = 4096 vsz_limit = 2 G } shutdown_clients = no ssl_cert = </etc/ssl/certs/xx ssl_key = </etc/ssl/private/xx userdb { driver = passwd } verbose_proctitle = yes protocol imap { imap_capability = IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS imap_client_workarounds = delay-newmail mail_max_userip_connections = 24 mail_plugins = " quota imap_quota" }

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[Dovecot] Upgrade/Migration
by sottilette＠rfx.it 30 Dec '11

30 Dec '11

Current box: CentOS 4.x (32 bit), dovecot 1.02, mbox format New box (supposed): CentOS 6.x (32/64 bit ? ), dovecot 2.04, mbox format The server have about 3.000 active users (unix users); /var/mail is about 100 GB; /home/Users about 150 GB I read the docs and searched on the net, but still request hints for planning the migration. 32/64 bit? Tricks to avoid users get all messages ...? Better first update the old server from 1.02 to 2.0x or ..? Any hints/comment appreciated ;-) Thanks, P. 1.02 dovecot.conf: ----------------------- protocols = pop3 pop3s imap imaps listen = [::] log_path = /var/log/mail/dovecot.log info_log_path = /var/log/mail/dovecot.info.log log_timestamp = "%b %d %H:%M:%S " default_mail_env = mbox:~/:INBOX=/var/mail/%u mail_full_filesystem_access = yes first_valid_uid = 100 mbox_read_locks = dotlock fcntl mbox_write_locks = dotlock fcntl auth default { mechanisms = plain passdb pam { } userdb passwd { } user = root } -----------------------

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[Dovecot] mbox, hierarchical folders/folders and IMAP
by Alexander Chekalin 30 Dec '11

30 Dec '11

Hello, I'm now dealing with funny problem. I try to use Dovecot (2.1.rc1, actually) and mbox format to store old mailing, to keep logic of "one folder = one file". If I'd choose Maildir, I'd be able to create hierarchical folders (like "OldMail -> Maillists -> Dovecot"), and in fact on disk such a folders would be stored as real folders with dots in their names. In PHP it is easy to create with "imap_createmailbox()" function, I'd simple fire it 3 times (for "OldMail", for "OldMail.Maillists" and for "OldMail.Maillists.Dovecot"). But when I do the same with mbox, in fact it creates separate files (indeed, named "OldMail", "OldMail.Maillists" and "OldMail.Maillists.Dovecot") instead of creating filesystem folders ("OldMail/Maillists/Dovecot"). PHP is not guilty, Thunderbird won't create such folders as well. I can only create folders myself (say, with mkdir in the shell), chown it, and the it perfectly works in IMAP. Now I just wanted to know, are there any way to create IMAP-folders and subfolders using standard IMAP functionality? Thank you, Alexander

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[Dovecot] Using Amazon S3 storage for Maildir ?
by Forrest Aldrich 30 Dec '11

30 Dec '11

I wonder if anyone has tried using an IMAP server with Amazon S3 as a backend. There would be many factors to consider (speed, etc). However, moreso, I don't know that Maildir(++) would support multiple folders that might be linked into the cloud. For example, higher-I/O local incoming mail is on disk, some folders archived on S3. Could be easily done by simply creating another account and storing its Maildir in S3 -- Curious....

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[Dovecot] How to serve a subset of IMAP folders for hand held devices.
by David Pottage 30 Dec '11

30 Dec '11

Hello I am currently running dovecot 1.2.15 on my home server. I have over 200 folders in personal email account, and I have found that my smart-phone does not work well trying to display that many folders. I solved the problem by creating a second instance of dovecot running on a non standard port, and configured it to serve only a subset my email folders, so that way the email client on my smartphone works well and I can read the emails I am interested in on the move. The process of configuring two instances of dovecot on the same machine serving different views of the same mailbox was faily complex, so I think it would be worth documenting the process in an FAQ or suchlike for other users. I thought a good place to write up my method would be in the HowTo section of the Dovecot Wiki. Is that a good idea? Can I request an account to edit the Wiki, or should I send a draft text to an editor? Are there any Dovecot experts here who can review my methods and suggest improvements? -- David Pottage

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[Dovecot] /usr/lib/dovecot/imap ignores log settings?
by Asheesh Laroia 29 Dec '11

29 Dec '11

Hi Dovecot peeps, I'm enjoying running /usr/lib/dovecot/imap directly as a PREAUTH IMAP pipe. I find that it outputs log messages whose severity is INFO to stdout. I'm running it as follows: /usr/lib/dovecot/imap -c /tmp/dovecot.conf and I see the following messages output to stdout: * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in as paulproteus imap(paulproteus): Info: Connection closed bytes=0/305 Naturally, the first line is great. My /tmp/dovecot.conf is: <cut here> # single-dbox mail_location = sdbox:~/Maildir/dbox log_path = syslog info_log_path = /dev/null </cut> I'm also attaching strace output, created by running this command: echo | strace /usr/lib/dovecot/imap -c /tmp/dovecot.conf > /tmp/straced 2>&1 (The point of the "echo | " is to provide a newline and then EOF to /usr/lib/dovecot/imap.) You can see in the strace output that /usr/lib/dovecot/imap outputs the "Connection closed" message to file descriptor 2. I'd like that message to actually not be printed, which is why I set log_path to syslog. -- Asheesh.

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[Dovecot] Dsync Error Can't Delete Mailbox
by Asai 29 Dec '11

29 Dec '11

Greetings, I'm getting this error in the dsync logs: Warning: Destination mailbox INBOX has been modified, need to recreate it before we can continue syncing dsync(foo(a)bar.org): Error: Can't delete mailbox INBOX: INBOX can't be deleted. In this situation, what should I do to remedy the problem? Just delete the backup and rebuild? -- --asai

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[Dovecot] Received date no longer email date?
by Brian L. Matthews 29 Dec '11

29 Dec '11

I just upgrade from dovecot 1.2 to dovecot 2.0.16. I use dovecot as a local IMAP server to archive email from my corporate email account (on Exchange). I don't have any automated archiving, I just periodically move messages from my Exchange inbox to the IMAP inbox. I'm on Mac OS X 10.6.8 using Entourage as my mail client. In the previous version of dovecot, the Received date of the email was preserved when I moved a message, but it's not in 2.0.16, it's set to the date and time I move the message. If I open a message, the date displayed is the date on the message as expected. I converted my config from 1.2 with $ doveconf -n -c dovecot.conf > dovecot-2.conf It spit out various warnings but, once I'd created a dovenull user, seemed to work fine. Here's my configuration info: $ dovecot --version 2.0.16 $ dovecot -n # 2.0.16: /usr/local/etc/dovecot/dovecot.conf # OS: Darwin 10.8.0 i386 disable_plaintext_auth = no listen = 127.0.0.1 log_path = /var/log/dovecot.log mail_location = maildir:~/Maildir passdb { args = login driver = pam } service auth { user = root } service imap-login { process_limit = 16 } service imap { process_limit = 64 } ssl = no userdb { driver = passwd } I'd like to get it back to preserving the Received date, any help you can provide will be appreciated. Brian

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[Dovecot] proxying, SSL, and client certificate
by Mike Abbott 29 Dec '11

29 Dec '11

How do I configure dovecot-2.0.x to present a client SSL certificate when proxying? If dovecot on server1.example.com has: passdb { driver = static args = proxy=y host=server2.example.com nopassword=y ssl=yes } and dovecot on server2.example.com has: ssl_verify_client_cert = yes auth_ssl_require_client_cert = yes then when a client connects to server1 and authenticates, a connection is established to server2 but the SSL handshake fails because server1 doesn't present a client certificate. I don't see where ssl_client_ctx is tied to a client certificate in ssl-proxy-openssl.c. Thanks.

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[Dovecot] Lucene vs Solr with 2.1 single server
by Daniel L. Miller 29 Dec '11

29 Dec '11

For a single server, is the Lucene backend now "better" than running a Solr server? -- Daniel

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