October 2014 - dovecot

Dovecot Master/Master Replication Problem
by Felix Amler 25 Oct '14

25 Oct '14

Hi, I've set up 2 servers with dovecot 2.2.9 using maildir using structure: /var/maildir/domain/localpart Server A: mx1.xxx.de Server B: mx2.xxx.de Mails are delivered to dovecot only on server A by exim4/dovecot deliver replication to Server B works immediatelly: mark mail as read on server A, mail is marked as read on server B. BUT: when i mark a mail as read on Server B, noting happens. On Server A I get messages like this in dovecot-error.log: 2014-10-22 22:35:05 dsync-server(localpart(a)domain.de): Error: stat(/var/maildir/domain.de/localpart/.dovecot-sync.lock/tmp) failed: Not a directory 2014-10-22 22:35:05 dsync-server(localpart(a)domain.de): Error: Failed to access mailbox dovecot-sync.lock: Internal error occurred. Refer to server log for more information. [2014-10-22 22:35:05] I googled a bit, this could habben if there is a file ".dovecot-sync.lock" in the maildir, but I've double checked that, there is no such file... Why does it work in one direction, but not in the other? Please help best regards Felix

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Replication .dovecot-sync.lock
by Hans-Werner Paulsen 25 Oct '14

25 Oct '14

Hello all, I have set up two servers with dovecot and replication. The mail location is mail_location = sdbox:/var/spool/mail/%u Everything works fine when I override the homedirectories userdb { driver = passwd override_fields = home=/var/spool/mail/%u } But, when I do not override the homedirectories, replication does not work, and the following error is logged: Oct 24 14:40:45 dsync-local(hans): Error: Couldn't create lock /afs/mpa/home/hans/.dovecot-sync.lock: Permission denied With a self-written module an IMAP user can get access to his homedirectory: protocol imap { mail_plugins = afsToken } The user has to type in his password. Obviously this does not work for replication. Is there a way to specify a different location for the lockfile? Isn't better to use the maildirectory but the homedirectory? Is there a way to set the homedirectory differently for replication? 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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2.2.14 and "Panic: file virtual-sync.c"
by Michael Köhler 25 Oct '14

25 Oct '14

Hi, after upgrading to 2.2.14 (debian wheezy with apt source from rename-it.nl) I´ve got from time to time a panic in virtual plugin. Here are an excerpt from the log file: ---------------------------------- Oct 21 20:44:15 mailserver dovecot: imap(michael@DOMAIN): flag_change: box=Virtual.Ungelesen, uid=1, msgid=<54466F71.3050702(a)makomi.de>, size=1661, flags=(\Seen \Draft \Recent) Oct 21 20:44:15 mailserver dovecot: imap(michael@DOMAIN): Panic: file virtual-sync.c: line 1115 (virtual_sync_backend_box): assertion failed: (array_count(&bbox->sync_pending_removes) == 0) Oct 21 20:44:15 mailserver dovecot: imap(michael@DOMAIN): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x752af) [0x7f5f2630e2af] -> /usr/lib/dovecot/libdovecot .so.0(+0x7530e) [0x7f5f2630e30e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f5f262c05de] -> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(virtual_storage_sync_init+0x266c ) [0x7f5f24abb9cc] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x35) [0x7f5f26601195] -> dovecot/imap(imap_sync_init+0x7a) [0x41faaa] -> dovecot/imap(cmd_sync_dela yed+0x190) [0x420710] -> dovecot/imap(client_handle_input+0x1d5) [0x417a35] -> dovecot/imap(client_input+0x72) [0x417d22] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x5b) [ 0x7f5f263200fb] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbb) [0x7f5f2632117b] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x7f5f26320189] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f5f26320208] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f5f262c5ab3] -> dovecot/imap(main+0x2a1) [0x 40c311] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f5f25f2bead] -> dovecot/imap() [0x40c475] Oct 21 20:44:15 mailserver dovecot: imap(michael@DOMAIN): Fatal: master: service(imap): child 31075 killed with signal 6 (core dumps disabled) ————————————————— Are the problem well-known? And what could I do? Thanks, Michael

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dovecot-lda from postfix on remote dovecot server
by nik600 25 Oct '14

25 Oct '14

Dear all i've got many SMTP front-end that filter the mail and do some custom stuff... then when i've decided the final destination i'd like to call /usr/lib/dovecot/dovecot-lda to deliver the mail. Actually i have in master.cf: #####################à dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail null_sender= argv=/usr/lib/dovecot/dovecot-lda -f ${sender} -d ${recipient} #####################à I'd like to know if is possible to use some other command or some additional parameter to deliver the mail to a remote dovecot server. Thanks -- /*************/ nik600 http://www.kumbe.it

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Replication only sporadic
by Lucas Rothamel - Eye Catching Webdesign 24 Oct '14

24 Oct '14

Hello dear Dovecot Gurus, I am setting up two servers with Dovecot replication as hot-standby servers for a small high availability cluster, switch-over through DNS-redirect. For testing purposes, both servers are generating a small test mail every few minutes and delivering to the local dovecot each. In my mail client, I added both servers through IMAP to watch how the replication is working. However, I noted that replication is very sporadic: sometimes a new email is received "instantaneous" by both servers, then no replication updates are visible for hours, and suddenly all missing mail appear in the other server. Why is this? Can this be changed to be more realtime? Thank you! Lucas doveconf -n: # 2.2.14: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.7 ext4 auth_mechanisms = plain login cram-md5 disable_plaintext_auth = no info_log_path = /var/log/dovecot-info.log log_timestamp = "%Y-%m-%d %H:%M:%S " mail_debug = yes mail_location = maildir:/home/%d/%n/Maildir mail_plugins = " notify replication" mail_privileged_group = mail passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { mail_replica = remote:vmail@... quota = maildir:User quota quota_rule = *:storage=1GB replication_full_sync_interval = 1 hours } protocols = imap pop3 service aggregator { fifo_listener replication-notify-fifo { mode = 0600 user = vmail } unix_listener replication-notify { mode = 0600 user = vmail } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } user = root } service config { unix_listener config { user = vmail } } service doveadm { user = vmail } service replicator { process_min_avail = 1 } ssl_cert = ... ssl_key = ... userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { mail_plugins = quota imap_quota } protocol pop3 { mail_plugins = quota pop3_uidl_format = %08Xu%08Xv } protocol lda { info_log_path = /var/log/dovecot-lda.log mail_plugins = quota postmaster_address = ... } -- Lucas Rothamel Eye Catching Webdesign info(a)eye-catching-webdesign.de - www.eye-catching-webdesign.de You know, we go to the gym to keep the body fit. Similarly the mind needs some rest. The mind is bombarded with so many impressions. Our mind has been bombarded by impressions the whole time. It needs a different kind of rest other than sleep. And meditation is such a rest. It calms the mind. energizes the spirit and makes the body more strong and vibrant. improves the immune system. The immune cells, the T-cell count go higher through Sudarshan Kriya and meditation. And you feel so nice inside. - Sri Sri Ravi Shankar I love deadlines. I like the whooshing sound they make as they fly by. -- Douglas Adams

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Sieve Advice Needed, Please
by Casey Bralla 24 Oct '14

24 Oct '14

Anybody here familiar with the Sieve language? I'm rebuilding my mail server, and I am working with the sieve language to automatically filter spam into a separate account. However, I've hit a snag that I can't get around. BTW, I'm using a clean install of dovecot, postfix, spamassassin on Debian 7.5. I want to do server-side spam filtering, so I've got spamasassin identifying spam, and then have sieve sorting the mail to a special spam folder. I can easily send spam to special folder in the inbox for each mail user, but I wanted to have a single mail account for spam. I can use the "redirect" sieve command to send anything with the X-spam-flag set, but this triggers an error and bounces the offending mail. The bounce message is: From: MAILER-DAEMON(a)NerdWorld.org (Mail Delivery System) To: casey(a)vmailservertest.nerdworld.org Subject: Undelivered Mail Returned to Sender Date: Sun, 19 Oct 2014 16:41:49 -0400 (EDT) This is the mail system at host VMailServerTest.NerdWorld.org. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <spam(a)vmailservertest.nerdworld.org>: mail forwarding loop for spam(a)vmailservertest.nerdworld.org From: casey(a)vmailservertest.nerdworld.org Date: Sun, 19 Oct 2014 16:41:20 -0400 (EDT) viagra!!!! www.viagra.com I think this is a recursion problem, since the redirected mail has to go through the spamassassin check and sieve again. I tried to get clever and prevent the recursion, but I'm not clever enough. Here is my sieve rule file. # # # A rule to move spam to the spam user # based on spamassassin setting the spam flag # # # require ["redirect"]; (Not needed, since it is part of the basis sieve spec) # # rule:[SPAM] if header :contains "X-Spam-Flag" ["YES"] { if address :is "to" "Spam(a)VMailServerTest.NerdWorld.org" { keep; } else { redirect "spam(a)VMailServerTest.NerdWorld.org"; } } # # # Anybody able to give me any advice? TIA -- Casey Bralla Chief Nerd in Residence The NerdWorld Organisation www.NerdWorld.org

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Re: special "what's my ip" pop account
by Joseph Tam 24 Oct '14

24 Oct '14

Steffen Kaiser writes: > let's put aside the question, if this way is sensible or not. [... continuing in nonsensible mode ...] > And if you are at it, maybe a dummy server with a self-made script that > returns "+OK POP3 your IP is ....", then return +FAIL for any further > command. Been there, done that (for a different problem). Not all mail readers will show you banners; to make this really work, you have to implement USER and PASS (accepts anything), STAT and LIST (one message available), RETR (dump your informational message payload), QUIT (disconnect), maybe TOP, and everything else is an +OK no-op. I patched Qualcomm's qpopper to do this. As to whether the OP *should* do this, definitely not. Find a better solution. Joseph Tam <jtam.home(a)gmail.com>

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Public root folder is \Noselect
by G H 23 Oct '14

23 Oct '14

I am utilizing a public namespace via http://wiki2.dovecot.org/SharedMailboxes/Public and using sdbox storage format. How can I get rid of the \Noselect flag that is set by default for this folder? IMAP output: b LIST "" "*" * LIST (\HasNoChildren \Sent) "/" Sent * LIST (\HasNoChildren \Trash) "/" Trash * LIST (\Noselect \HasNoChildren) "/" Public * LIST (\HasNoChildren) "/" INBOX If this is not possible, what is the best way to create a sub-folder in here upon system setup (one w/o a \Noselect flag)? Thanks, G H

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special "what's my ip" pop account
by A. Schulze 23 Oct '14

23 Oct '14

Hello, I like to enable the allow_nets Feature (http://wiki2.dovecot.org/PasswordDatabase/ExtraFields/AllowNets) for my customers. To help them knowing there own IP I imagine a special mailbox/loginuser at the pop3 server. That user could give a valid pop3 answer from a dummy pop3 server or simply throw a login error with customised answer containing the IP information. Has anybody done something similar or ideas to build such a system? Thanks for ideas Andreas

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What is the correct way to configure the mail_location option for Mailidr format?
by deoren 23 Oct '14

23 Oct '14

Short version: What is the correct way to configure the mail_location option for Mailidr format? I've long had it setup this way: mail_location = maildir:/var/vmail/%d/%n based on this guide: https://www.linode.com/docs/email/postfix/email-with-postfix-dovecot-and-my… Is that correct? Longer version: After upgrading from Dovecot v2.0.x to v2.2.x yesterday I'm coming to the conclusion that I've got it configured wrong. This is probably compounded by my bright idea of explicitly setting the path separator prior to the upgrade like so: separator = . Because we're using Maildir I thought it would be useful to explicitly set the separator value to what the default is for Maildir. I figured this would be a good way to remind myself what the separator is by default. I also figured while I was merging the conf changes between v2.0 and v2.2 I could roll that additional change in also. Looks like that was a bad idea to include unnecessary changes until things had stabilized. I should know better; I was too optimistic for my own good. Here is an example error message I ran into: stat(/var/vmail/example.com/username/.dovecot.lda-dupes/tmp) failed: Not a directory which is nearly identical (other than leading path) to what is shown here: http://www.dovecot.org/list/dovecot/2010-April/048227.html Steffen Kaiser responded with, "You should not (must not) have home == maildir root." That is when I double-checked the guide that I mentioned above and found that I had followed their directions exactly for that conf setting. Looking at some other guides/tutorials shows something more like: mail_location = maildir:/var/vmail/%d/%n/Maildir I assume the latter is how it's supposed to be done? If so, that would explain the problems I've had with Sieve scripts in the past until I explicitly set 'sieve_dir' like so: sieve_dir = /var/vmail/sieve/%d/%n/sieve_dir I did review the official docs here: http://wiki2.dovecot.org/MailLocation/Maildir but I didn't find where it explicitly warns against setting home == maildir root. It should probably be apparent, but it wasn't to me when I first configured that setting. Thanks in advance for your help. If it turns out that the linode.com guide is wrong I'll create a Pull request to have that guide updated.

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