- dovecot - dovecot.org

Error: Virtual mailbox loops, Dovecot version 2.2.10
by dan＠redchops.com 03 Apr '17

03 Apr '17

I'm trying to follow the guide at https://wiki.dovecot.org/Plugins/Virtual for the 'Conversation' style virtual mailbox, but with a small change. I'd like the virtual mailboxes to be 'top level', which I found while searching through this list is accomplishable by putting the dovecot-virtual file in the root of the namespace location. My issue is this works perfectly fine for the All Mail virtual mailbox, but the Threaded mailbox fails with the error above. I tried creating a RealMail namespace, but that doesn't solve the issue either. I feel like I must be overlooking something simple; I could get this setup working if the virtual mailboxes shared a namespace and were subfolders, but I don't like that setup much (I'm trying to get my companies GMail users on to our own webmail client, it's features like this that I need to replicate with dovecot or they'll never leave their POP3 setups). I've attached the output of dovecot -n, and my virtual mailboxes look like this: # cat Threaded/dovecot-virtual All inthread refs x-mailbox INBOX # cat all/dovecot-virtual RealMail RealMail/* -RealMail/Trash -RealMail/Trash/* -RealMail/Spam -RealMail/Spam/* all I'd appreciate any insight in to this issue. If I try to access the Threaded Inbox through IMAP, I get this error specifically: a select "Threaded Inbox" a NO [SERVERBUG] Virtual mailbox open failed because of mailbox All: Internal error occurred. Refer to server log for more information. [2017-04-03 00:24:28] The relevant line being: Apr 3 00:24:28 mail dovecot: imap(dan(a)redchops.com): Error: Virtual mailbox loops: No information before or after. Thanks, -Dan

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Re: Getting error on port 995
by Joseph Tam 03 Apr '17

03 Apr '17

Bhushan Bhosale writes: > I'm getting issue with port 995 by using Microsoft Outlook 2016 only. > The error on Microsoft Outlook showing "Your server does not support > the connection encryption type. Try changing the encryption method". > The error is only who is using Microsoft outlook2016. Kindly help. Help us help you. Please include output of "dovecot -n" and any relevant log entries. As a wild ass guess, I think maybe the client is using used "STARTTLS" intead of "SSL", or some other SSL requirement disagreement. Joseph Tam <jtam.home(a)gmail.com>

2 1

Mail list empty on my mailserver
by Philippe Forums 03 Apr '17

03 Apr '17

Hello, After changing NAS, I meet a problem when I go on my e-mail box with my webmail. Either e-mails do not appear anymore, or they appear but are "empty". When I look in the directory of the e-mails of my mailserver, these e-mails are present. I tried to rename files "dovecot.index*" and to restart dovecot but nothing can be done. To make the seesaw of a NAS towards an other one, I copied all the directory of mailserver to an external storage, and made the copy the other way on my new NAS. This directory is a mount to a NAS. Having well to look, it would seem whether it is a date problem, because the copy did not keep the real dates of e-mails and they thus find themselves dated the day of the copy. I know not at all how to get back all my e-mails in my webmail. Thank's for your help. PS : I'm french, sorry for my english. -- ##################### Philippe - Forums

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Getting error on port 995
by Bhushan Bhosale 02 Apr '17

02 Apr '17

Dear Team, I'm getting issue with port 995 by using Microsoft Outlook 2016 only. The error on Microsoft Outlook showing "Your server does not support the connection encryption type. Try changing the encryption method". The error is only who is using Microsoft outlook2016. Kindly help. Thanks and Regards, Bhushan Bhosale

2 1

dsync replication
by George Dimakopoulos 31 Mar '17

31 Mar '17

Is it stable for dovecot 2.2.27 to implement DRBD (or HAST) on block level for maildir data replication instead of using dsync plugin? Regards, George

2 1

Slow performance with large folders over the Internet
by Shawn Heisey 31 Mar '17

31 Mar '17

Dovecot package version is 1:1.2.15-7+deb6u1. It is in Debian 6.0.10, using the Debian package. The server is in my basement at home, and is exposed to the Internet so I can fully access my mail from anywhere. I use IMAP for reading mail. I have a number of folders in my mailbox that have thousands of messages in them, from mailing lists. When I'm at home, I have a LAN connection to the server. It goes through a Cisco firewall that limits the connection speed to 100Mb/s. In this situation, I can open a folder with 25000 messages in it, click on the next unread message that Thunderbird did not know about before, and within a second or two, the message will download, allowing me to view it and reply. When I'm at work, with highly variable network latency between Thunderbird and the server, doing exactly the same thing takes a LOT longer. I have seen it take as long as 15 minutes for a single message. If I open a folder with only a few messages in it, it is fast. The server is not overloaded -- I can log into it with ssh and use "mutt -f" to open a folder directly. Loading thousands of messages into mutt takes a while, but I have no difficulty using the ssh connection and running commandline programs. This suggests that the IMAP communication between the server and the client involves a large amount of back and forth communication when the message count in the folder is high, possibly something for every message in the folder. It happens quickly on a LAN but crawls on a connection with high latency. I can understand it taking a few seconds longer on a high-latency link, but it takes minutes. I do plan on building a new server and migrating to Dovecot 2.x, but I haven't had the time to work on that. Is this a known problem? If so, is it fixed in 2.x? Thanks, Shawn

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Studying dovecot source code (searching for mail_deliver_hook_set)
by chaouche yacine 30 Mar '17

30 Mar '17

Hello dovecot, I would like to study how dovecot manages quota, especially how it deals with the maildirsize file if one chooses to implement quota according to the maildir++ specification. I made a number of assumptions : 1. mail is (always/sometimes) delivered with the dovecot-lda binary, which source code is in src/lda. 2. mail is sent with the mail_deliver function which is called from src/lda/main.c and is defined in src/lib-lda/mail-deliver.c 3. mail_deliver function calls the deliver_mail function (it seems to be pointer to a function) 4. according to src/lib-lda/mail-deliver.h, deliver_mail is set with the mail_deliver_hook_set function. Here's what the comment says /* Sets the deliver_mail hook and returns the previous hook, which the new_hook should call if it's non-NULL. */ deliver_mail_func_t *mail_deliver_hook_set(deliver_mail_func_t *new_hook); The problem at this point is that I can't find where is this function called. A grep on the sources only reveals two results : -*- mode: grep; default-directory: "~/DOWNLOADS/APPS/dovecot-2.2.13/src/" -*- Grep started at Tue Mar 28 17:01:50 grep -nH -e 'mail_deliver_hook_set' -r . ./lib-lda/mail-deliver.c:428:deliver_mail_func_t *mail_deliver_hook_set(deliver_mail_func_t *new_hook) ./lib-lda/mail-deliver.h:103:deliver_mail_func_t *mail_deliver_hook_set(deliver_mail_func_t *new_hook); Grep finished (matches found) at Tue Mar 28 17:01:50 According to the changelog this function has been introduced back in 2010. I don't know if it's really used ? * I am working on the 2.2.13 sources because that's what's installed on my server. * I couldn't find a developers mailling listed in http://www.dovecot.org/mailinglists.html so I'm just posting this here. -- Yassine.

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Email Push to Iphone
by mca＠caloro.ch 30 Mar '17

30 Mar '17

Hello Please exist in Dovecot 2.2.13 the E-Mail Push function? So that the Email on me Iphone are available at this moment that will be transfered, I see or found any other 3part software "Z-push", but it's this function are not included on dovecot? Thanks and regards Mauri

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Using SpamProbe via only sieve scripts
by Mark Constable 30 Mar '17

30 Mar '17

FWIW this took me days to get right, and still needs tinkering, but it might make for a good starting point for anyone else needing something similar (ie; I don't use or need the overhead of spamassassin or rspamd). https://gist.github.com/markc/eeeb66ce30ea805af62631656cf86c4d Any comments or corrections on that page would be appreciated.

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Re: cannot login to imap under load
by Gerard Ranke 29 Mar '17

29 Mar '17

Hi Maria, It does indeed run from systemd, so this is what's currently in the dovecot unit file ( /etc/systemd/system/dovecot.service ): [Unit] Description=Dovecot IMAP/POP3 email server After=local-fs.target network.target [Service] Type=simple ExecStart=/usr/sbin/dovecot -F NonBlocking=yes TasksMax=10000 LIMIT_NOFILE=10000 [Install] WantedBy=multi-user.target Unfortunately, it doesn't seem to work... Best, gerard On 29-03-17 13:13, María Arrea wrote: > > If you are running dovecot via systemd, increase NOFILES in the > dovecot startup script > > El 29/03/17 a las 13:07, Gerard Ranke escribió: >> Hi Steffen, >> >> On 29-03-17 12:38, Steffen Kaiser wrote: >>> On Tue, 28 Mar 2017, Gerard Ranke wrote: >>> >>>> dovecot: master: Error: service(imap): fork() failed: Resource >>>> temporarily unavailable >>>> dovecot: master: Error: service(imap): command startup failed, >>>> throttling for 2 secs >>> check out the ulimits for the Dovecot process. >>> >>> -- Steffen Kaiser >> Here they are: >> >> dovecot@mail:~> ulimit -a >> core file size (blocks, -c) 0 >> data seg size (kbytes, -d) unlimited >> scheduling priority (-e) 0 >> file size (blocks, -f) unlimited >> pending signals (-i) 256942 >> max locked memory (kbytes, -l) 64 >> max memory size (kbytes, -m) unlimited >> open files (-n) 10000 >> pipe size (512 bytes, -p) 8 >> POSIX message queues (bytes, -q) 819200 >> real-time priority (-r) 0 >> stack size (kbytes, -s) 8192 >> cpu time (seconds, -t) unlimited >> max user processes (-u) 256942 >> virtual memory (kbytes, -v) unlimited >> file locks (-x) unlimited >> >> This looks ok to me, but on startup, I still get: >> >> dovecot[9309]: Warning: fd limit (ulimit -n) is lower than required >> under max. load (1024 < 10000), because of service auth { client_limit } >> >> Strange thing is that dovecot still complains about the fd limit being >> 1024, while I set it to 10000. And how can a ulimit be too low 'because >> of service auth'? I don't get that at all. Thanks for your interest! >> >> gerard > >

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cannot login to imap under load
by Gerard Ranke 29 Mar '17

29 Mar '17

Dear list, We moved our dovecot installation to a new vm, and ever since there are problems logging in to our imap server during office hours. ( Evenings and weekends are fine. ) Both the new and the old machine are dovecot 2.2.13. Symptoms: Logging in via imap gives: . OK Pre-login capabilities listed, post-login capabilities have more. a login <loginname> <passwd> * OK Waiting for authentication master process to respond.. closed whereas using the same credentials with pop3: +OK Dovecot ready. user <loginname> +OK pass <passwd> +OK Logged in. Our mail.err log gives lots of: dovecot: imap-login: Error: master(imap): Auth request timed out (received 0/12 bytes) dovecot: imap: Error: Login client disconnected too early dovecot: auth: Error: Master request 24000.918 not found dovecot: master: Error: service(imap): fork() failed: Resource temporarily unavailable dovecot: master: Error: service(imap): command startup failed, throttling for 2 secs Note thate we our users almost exclusively use imap. Normally we would have some 7 or 800 imap processes running and only a few pop3. Our doveconf -n output: # 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 4.4.38-93-default x86_64 SUSE Linux Enterprise Server 12 (x86_64) auth_mechanisms = plain login default_client_limit = 2000 default_process_limit = 2000 default_vsz_limit = 512 M disable_plaintext_auth = no imap_client_workarounds = tb-extra-mailbox-sep import_environment = TZ DEBUG_OUTOFMEM DOVECOT_HOSTDOMAIN mail_location = maildir:~/Maildir mail_plugins = " quota" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { quota = maildir:User quota quota_rule = *:storage=1G quota_rule2 = Trash:storage=+10%% sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = imap pop3 lmtp sieve service anvil { client_limit = 8003 } service auth { client_limit = 10000 unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = dovecot mode = 0666 } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } process_min_avail = 4 service_count = 0 } service imap { process_limit = 2048 } service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { port = 995 ssl = yes } process_min_avail = 4 service_count = 0 } service pop3 { process_limit = 2048 } ssl_cert = </etc/ssl/certs/hkuwildcardthawte.crt ssl_key = </etc/ssl/certs/hkuwildcardthawte.key ssl_protocols = !SSLv2 !SSLv3 userdb { args = /etc/dovecot/dovecot-ldap-userdb.conf driver = ldap } protocol lmtp { mail_plugins = " quota sieve" } protocol lda { mail_plugins = " quota sieve" } protocol imap { mail_max_userip_connections = 10 mail_plugins = " quota imap_quota" } Thank you all for any insight, it will be much appreciated! Best regards, gerard

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pigeonhole / vacation
by A. Schulze 29 Mar '17

29 Mar '17

Hello, we use the sieve vacation module to answer messages for certain mailboxes. vacation send back answers to most but not all messages wich is fine and intended. .dovecot.sieve looks like this: require ["vacation", "variables"]; if header :matches "subject" "*" { vacation :subject "Automatic response to: ${1}" "thanks for your message"; keep; } But now I would like to distinct messages that where answered from those where the vacation module did not send back a message. Is it possible to store answered messages in one folder and unanswered in an other? # probably invalid sieve syntax if vacation .... { fileinto "answered/"; stop; else fileinto "unanswered/"; stop; } After reading RFC 5230 I feel it's not possible at all :-/ Andreas

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Re: Email Push to Iphone
by Ricardo Branco 29 Mar '17

29 Mar '17

there is this plugin to use APNS to notify phones, its a faf though as you need a legal OSX Server to generate the signing keys, I never ended up implementing it. https://github.com/st3fan/dovecot-xaps-daemon Aki Tuomi wrote on 29/03/2017 07:29: > > On 29.03.2017 07:24, mca(a)caloro.ch wrote: >> Hello >> >> >> >> Please exist in Dovecot 2.2.13 the E-Mail Push function? >> >> >> >> So that the Email on me Iphone are available at this moment that will be >> transfered, I see or found any other 3part software "Z-push", but it's this >> function are not included on dovecot? >> >> >> >> Thanks and regards >> >> Mauri >> >> > There exists a push notification framework for dovecot, but it does not support iPhone push directly. See https://wiki2.dovecot.org/Plugins/PushNotification > > Aki

1 0

Tip: update dovecot MD5 password from PAM
by Steinar Bang 29 Mar '17

29 Mar '17

This is a PAM module that listens for password changes, and will update the MD5 password for a user, in a file that dovecot can read, when the user's password is changed: https://github.com/steinarb/pam_dovecotmd5pwd Caveat emptor! (Works for me...! :-) )

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The challenge of customizing Dovecot
by Robert Moskowitz 29 Mar '17

29 Mar '17

I have been running Dovecot for sometime, but I have just used someone else efforts on customizing it. Many of these throw out the dovecot/conf.d files for a single dovecot.conf with no explanation on what does what. So tell you a few conf.d files to edit. So over the past few days, I have rolled up my sleeves and did my best to work out how to modify the proper conf.d files. To 'stay true' to the Dovecot maintainer's config organization. The target is Centos7 with Dovecot 2.2.10-7 It was HARD! Besides dovecot.conf, I had to modify 13 conf.d files. Add 3 .ext files in /etc/dovecot, and set up sieve. I will soon have my total instructions available on my server, but to share with you what I have done for Dovecot customization and maybe to get some recommendations on improvements. For the most part, I have used SED to modify the conf files. I use a few env variables: your_domain_tld= your_host_only= your_host_tld=$your_host_only.$your_domain_tld Postfix_Database_Password= What follows are the pieces of my customization, all comments welcomed (this is NOT adequately tested! That is later in the week!): sed -i -e "/^#protocols/s/$/ sieve/w /dev/stdout" /etc/dovecot/dovecot.conf sed -i -e "s/^#protocols/protocols/w /dev/stdout" /etc/dovecot/dovecot.conf sed -i -e "s/#quota = /sqlquota = /w /dev/stdout" /etc/dovecot/dovecot.conf sed -i -e "/^auth_mechanisms/s/$/ login/w /dev/stdout" /etc/dovecot/conf.d/10-auth.conf sed -i -e 's/^#!include auth-sql.conf.ext/!include auth-sql.conf.ext/w /dev/stdout' /etc/dovecot/conf.d/10-auth.conf sed -i -e "0,/#userdb {/ s/#userdb {/userdb {/w /dev/stdout" /etc/dovecot/conf.d/auth-sql.conf.ext sed -i -e "s/# driver = prefetch/ driver = prefetch\n }/w /dev/stdout" /etc/dovecot/conf.d/auth-sql.conf.ext sed -i -e "/^#mail_location/s/$/maildir:\/home\/vmail\/%d\/%n/w /dev/stdout" /etc/dovecot/conf.d/10-mail.conf sed -i -e "s/^#mail_location/mail_location/w /dev/stdout" /etc/dovecot/conf.d/10-mail.conf sed -i -e "s/first_valid_uid = 1000/first_valid_uid = 101/w /dev/stdout" /etc/dovecot/conf.d/10-mail.conf sed -i -e "s/#first_valid_gid = 1/first_valid_gid = 12/w /dev/stdout" /etc/dovecot/conf.d/10-mail.conf sed -i "/unix_listener auth-userdb/ a mode = 0666\n user = vmail\n group = mail" /etc/dovecot/conf.d/10-master.conf sed -i "/#unix_listener \/var\/spool/ a mode = 0666\n user = postfix\n group = postfix\n }" /etc/dovecot/conf.d/10-master.conf sed -i -e "s/#unix_listener \/var\/spool/unix_listener \/var\/spool/w /dev/stdout" /etc/dovecot/conf.d/10-master.conf sed -i "/unix_listener dict/ a mode = 0666\n user = vmail\n group = mail" /etc/dovecot/conf.d/10-master.conf sed -i -e "s/^mode/ mode/w /dev/stdout" /etc/dovecot/conf.d/10-master.conf sed -i -e "s/dovecot\/certs\/dovecot.pem/tls\/certs\/$your_host_tld.crt/w /dev/stdout" /etc/dovecot/conf.d/10-ssl.conf sed -i -e "s/dovecot\/private\/dovecot.pem/tls\/private\/$your_host_tld.key/w /dev/stdout" /etc/dovecot/conf.d/10-ssl.conf sed -i -e "/^#postmaster_address/s/$/ postmaster@$your_domain_tld/w /dev/stdout" /etc/dovecot/conf.d/15-lda.conf sed -i -e "s/^#postmaster_address/postmaster_address/w /dev/stdout" /etc/dovecot/conf.d/15-lda.conf sed -i "/#mail_plugins/ a mail_plugins = quota sieve" /etc/dovecot/conf.d/15-lda.conf sed -i -e "s/^mail_plugins/ mail_plugins/w /dev/stdout" /etc/dovecot/conf.d/15-lda.conf sed -i -e "s/^#lda_mailbox_autocreate = no/lda_mailbox_autocreate = yes/w /dev/stdout" /etc/dovecot/conf.d/15-lda.conf sed -i -e "s/^#lda_mailbox_autosubscribe = no/lda_mailbox_autosubscribe = yes/w /dev/stdout" /etc/dovecot/conf.d/15-lda.conf sed -i "/#mail_plugins / a mail_plugins = quota imap_quota trash" /etc/dovecot/conf.d/20-imap.conf sed -i -e "s/^mail_plugins/ mail_plugins/w /dev/stdout" /etc/dovecot/conf.d/20-imap.conf sed -i "/#imap_client_workarounds/ a imap_client_workarounds = delay-newmail" /etc/dovecot/conf.d/20-imap.conf sed -i "/#mail_plugins/ a mail_plugins = sieve" /etc/dovecot/conf.d/20-lmtp.conf sed -i -e "s/^mail_plugins/ mail_plugins/w /dev/stdout" /etc/dovecot/conf.d/20-lmtp.conf sed -i -e "s/^#lmtp_save_to_detail_mailbox = no/lmtp_save_to_detail_mailbox = yes/w /dev/stdout" /etc/dovecot/conf.d/20-lmtp.conf sed -i -e "s/#service managesieve-login/service managesieve-login/w /dev/stdout" /etc/dovecot/conf.d/20-managesieve.conf sed -i -e "s/#inet_listener sieve {/inet_listener sieve {/w /dev/stdout" /etc/dovecot/conf.d/20-managesieve.conf sed -i -e "s/# port = 4190/ port = 4190\n }/w /dev/stdout" /etc/dovecot/conf.d/20-managesieve.conf sed -i "/#vsz_limit/ a }" /etc/dovecot/conf.d/20-managesieve.conf sed -i "/#mail_plugins/ a mail_plugins = quota" /etc/dovecot/conf.d/20-pop3.conf sed -i -e "s/^mail_plugins/ mail_plugins/w /dev/stdout" /etc/dovecot/conf.d/20-pop3.conf sed -i "/#pop3_client_workarounds/ a pop3_client_workarounds = outlook-no-nuls oe-ns-eoh" /etc/dovecot/conf.d/20-pop3.conf sed -i -e "s/#acl = /acl = /w /dev/stdout" /etc/dovecot/conf.d/90-acl.conf sed -i -e "s/#sieve_before =/sieve_before = \/home\/sieve\/globalfilter.sieve/w /dev/stdout" /etc/dovecot/conf.d/90-sieve.conf cat <<EOF>>/etc/dovecot/conf.d/90-quota.conf || exit 1 plugin { quota = dict:user::proxy::sqlquota trash = /etc/dovecot/dovecot-trash.conf.ext } EOF cat <<EOF>/etc/dovecot/dovecot-trash.conf.ext || exit 1 # Spam mailbox is emptied before Trash 1 Spam # Trash mailbox is emptied before Sent # 2 Trash # If both Sent and "Sent Messages" mailboxes exist, the next oldest message # to be deleted is looked up from both of the mailboxes. # 3 Sent # 3 Sent Messages EOF cat <<EOF>/etc/dovecot/dovecot-sql.conf.ext || exit 1 driver = mysql connect = host=localhost dbname=postfix user=postfix password=$Postfix_Database_Password default_pass_scheme = MD5-CRYPT # following should all be on one line. password_query = SELECT username as user, password, concat('/home/vmail/', maildir) as userdb_home, concat('maildir:/home/vmail/', maildir) as userdb_mail, 101 as userdb_uid, 12 as userdb_gid FROM mailbox WHERE username = '%u' AND active = '1' # following should all be on one line user_query = SELECT concat('/home/vmail/', maildir) as home, concat('maildir:/home/vmail/', maildir) as mail, 101 AS uid, 12 AS gid, CONCAT('*:messages=30000:bytes=', quota) as quota_rule FROM mailbox WHERE username = '%u' AND active = '1' EOF cat <<EOF>/etc/dovecot/dovecot-dict-sql.conf.ext || exit 1 connect = host=localhost dbname=postfix user=postfix password=$Postfix_Database_Password map { pattern = priv/quota/storage table = quota2 username_field = username value_field = bytes } map { pattern = priv/quota/messages table = quota2 username_field = username value_field = messages } EOF mkdir /home/sieve cat <<EOF>/home/sieve/globalfilter.sieve || exit 1 require "fileinto"; if header :contains "X-Spam-Flag" "YES" { fileinto "Spam"; } if header :contains "subject" "***SPAM***" { fileinto "Spam"; } EOF sievec /home/sieve/globalfilter.sieve chown -R vmail:mail /home/sieve

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Re: UID Purge?
by Aki Tuomi 28 Mar '17

28 Mar '17

On 28.03.2017 10:55, Kevin Myers wrote: >> Does this happen if you do this on wire? >> >> telnet localhost 143 >> a LOGIN username password >> s SELECT INBOX >> s STORE 1:1 FLAGS (\Deleted) # or some other message-set >> n NOOP >> l LOGOUT >> >> Aki > Good point. No. And if I just delete it in Thunderbird (my client) it > does as it's told and just marks it deleted. Maybe it's a > Thunderbird/Dovecot thing? you could try looking at https://wiki2.dovecot.org/Debugging/Rawlog to find out. Aki

3 4

UID Purge?
by Kevin 28 Mar '17

28 Mar '17

Hi, I've just migrated to Dovecot from cyrus-imapd, and I notice that when I move emails from one folder to another they appear to be automatically marked deleted (expected) and also purged (not expected). With cyrus, I am used to emails being marked deleted, but still existing until a manual purge (expunge). Is this normal behaviour with Dovecot, and is it configurable? Thanks. Kevin.

2 1

replicator crashing - oom
by Daniel Miller 24 Mar '17

24 Mar '17

I have the following in my log: Mar 21 14:46:59 bubba dovecot: replicator: Panic: data stack: Out of memory when allocating 1073741864 bytes Mar 21 14:46:59 bubba dovecot: replicator: Error: Raw backtrace: /usr/local/lib/dovecot/libdovecot.so.0(+0x97c90) [0x7f4638a7cc90] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x97d6e) [0x7f4638a7cd6e] -> /usr/local/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f4638a14322] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x95e3f) [0x7f4638a7ae3f] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x9608b) [0x7f4638a7b08b] -> /usr/local/lib/dovecot/libdovecot.so.0(+0xb15f8) [0x7f4638a965f8] -> /usr/local/lib/dovecot/libdovecot.so.0(+0x93c42) [0x7f4638a78c42] -> /usr/local/lib/dovecot/libdovecot.so.0(buffer_write+0x74) [0x7f4638a78fb4] -> dovecot/replicator(replicator_queue_push+0x13b) [0x40519b] -> dovecot/replicator() [0x4049c2] -> dovecot/replicator() [0x4040a8] -> dovecot/replicator() [0x404275] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x52) [0x7f4638a907d2] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xe7) [0x7f4638a91d17] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x3c) [0x7f4638a9086c] -> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f4638a90a28] -> /usr/local/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f4638a1dfc3] -> dovecot/replicator(main+0x17a) [0x40342a] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f4638640ec5] -> dovecot/replicator() [0x4034c5] Mar 21 14:47:00 bubba dovecot: replicator: Fatal: master: service(replicator): child 15650 killed with signal 6 (core dumped) -- Daniel

4 7

One way dsync replication with dsync -R
by Wolfgang Hennerbichler 24 Mar '17

24 Mar '17

Hi dovecot users, I’ve found the -R parameter for dsync. Does this enable one-way syncing if enabled on the slave in replication_dsync_parameters? The documentation doesn’t mention much what happens if I enable this on the “replciation slave”. Before you ask: Two way synchronisation causes issues in my installation (see the unanswered thread here: http://www.dovecot.org/list/dovecot/2017-March/107431.html) it causes unread, deleted messages to re-appear. I would hope that one-way synchronisation would avoid this, but I’d also like to know if the -R parameter is safe to use. I am also still wondering if anybody has a perfectly working 2-way-synchronised dovecot installation (and I’m interested in your dovecot -n). wogri

2 5

FTS on shared/virtual folders
by Daniel Miller 24 Mar '17

24 Mar '17

A question on how FTS is implemented with regards to shared & virtual mailbox. In particular - with Solr. Does Dovecot treat each shared and virtual mailbox as completely independent - which means Solr would reindex each appearance independently? If that's the case, has any thought been given to potentially identifying such queries and passing them to Solr against the "native" or private mailboxes that are referenced? -- Daniel

1 0

"Connection queue full" error
by Mark Moseley 24 Mar '17

24 Mar '17

Just a quickie: why is "Connection queue full" logged under Info, instead of something like error? Or at least have the word 'error' in it? Seems like a pretty error-ish thing to happen. Anything that causes the connection to fail from the server side should show up in a grep -i for error. I.e. I don't care about clients failing to match up SSL cipher suites; that's fine as Info (SSL errors ironically do have 'error' in them, though I assume that's coming from the ssl libs). But the server dropping connections due to running out of available daemons (and any other "server isn't working right" conditions) is definitely worthy of Error.

1 0

dsync with namespaces
by Tom Sommer 23 Mar '17

23 Mar '17

I have a major dsync headache which I am hoping someone can help me with. I have to migrate mails from a 'namespace/inbox/prefix=INBOX.' server to a 'namespace/inbox/prefix=' server. So I'm trying # dsync -o 'namespace/inbox/prefix=' sync -1 -f -u xx(a)xx.com tcp:1.2.3.4 It works fine for some accounts, however for others many hundreds and sometimes thousands of mails go missing from the destination inbox, and a resync doesn't pick them up. The debug output doesn't recognize these either. If I remove the 'namespace/inbox/prefix=' part, then I get 'Error: Couldn't find namespace for mailbox X' errors. Both source and destination is running 2.2.27 I can't imapsync :S Thanks. -- Tom

1 0

Re: Can't verify remote server certs without trusted CAs (ssl_client_ca_* settings)
by Ralf Hildebrandt 23 Mar '17

23 Mar '17

* Aki Tuomi <aki.tuomi(a)dovecot.fi>: > Could you send us the gdb bt full backtrace for the core file? Currently I can't get it to create coredumps doveconf -n: # 2.2.devel (3f97702): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.devel (023f391) # OS: Linux 4.4.0-65-generic x86_64 Ubuntu 16.04.2 LTS auth_mechanisms = plain login default_vsz_limit = 1 G imapc_host = exchange-imap.charite.de imapc_port = 993 imapc_ssl = imaps imapc_ssl_verify = no listen = *,:: mail_gid = imapproxy mail_home = /home/imapproxy/%u mail_location = imapc:~/imapc mail_plugins = mail_log notify mail_uid = imapproxy passdb { args = host=exchange-imap.charite.de port=993 ssl=imaps default_fields = userdb_imapc_user=%u userdb_imapc_password=%w userdb_imapc_host=exchange-imap.charite.de userdb_imapc_ssl=imaps userdb_imapc_port=993 driver = imap } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = imap service auth { inet_listener { address = 127.0.0.1 port = 12345 } } ssl = required ssl_ca = </etc/ssl/certs/ca-certificates.crt ssl_cert = </etc/dovecot/dovecot.pem ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS:!RC4 ssl_client_ca_file = /etc/ssl/certs/ca-certificates.crt ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes ssl_protocols = !SSLv2 !SSLv3 userdb { driver = prefetch } verbose_proctitle = yes Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebrandt(a)charite.de | http://www.charite.de

3 4

Ubuntu Dovecot 2.2.9 several Errors, Transaction log as well as BUG message
by Kein Name 23 Mar '17

23 Mar '17

Hello List, I am running an Ubuntu 14.04.5 LTS Server with Dovecot 2.2.9, only local filesystems and authentication done via mysql backend. Server is a Strato Virtual Server running 2.6.32-042stab120.11 #1 SMP Fri Mar 10 16:52:50 MSK 2017 i686 i686 i686 GNU/Linux Sometimes I see errors in the log like this for one user: Error: Transaction log /var/vmail/ example.net/jena/Maildir/.Archives.2017/dovecot.index.log: duplicate transaction log sequence (2) After seeing these, some time later, (mostly 2h), Dovecot starts to deny login from all clients with messages like this: Mar 23 01:32:27 h2312250 dovecot: auth: Error: BUG: Authentication client sent unknown handshake command: REQUEST?1804861441?19318?1?9ce500129289a0237e4e85a6c880a047?session_pid=19323... Mar 23 01:32:27 h2312250 dovecot: imap: Error: Authentication server didn't send valid SPID as expected: MECH#011PLAIN#011plaintext Mar 23 01:32:27 h2312250 dovecot: imap: Error: Disconnected from auth server, aborting (client-pid=19318 client-id=1) Mar 23 01:32:27 h2312250 dovecot: imap-login: Internal login failure (pid=19318 id=1) (internal failure, 1 successful auths): user=< user(a)example.net>, method=PLAIN, rip=X, lip=X, mpid=19323, session=<G9f4AltL4ABRqZ4X> I do not know if these problems have something to do with each other or not. But it happened several times now (maybe once or twice every month or so). When I restart Dovecot, the error seems gone for the moment, until it comes back in a month or some weeks. For reference, here is the running config: dovecot.conf # 2.2.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-042stab120.11 i686 Ubuntu 14.04.5 LTS auth_mechanisms = plain login auth_verbose = yes disable_plaintext_auth = no log_timestamp = "%Y-%m-%d %H:%M:%S " managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave passdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } plugin { quota = maildir:User quota quota_rule = *:bytes=10M sieve = ~/dovecot.sieve } protocols = imap pop3 sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-master { mode = 0600 user = vmail } user = root } ssl_cert = </etc/postfix/sslcert/mailserver.crt ssl_key = </etc/postfix/sslcert/mailserver.key userdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } protocol pop3 { mail_plugins = quota pop3_uidl_format = %08Xu%08Xv } protocol imap { mail_plugins = quota imap_quota } protocol lda { auth_socket_path = /var/run/dovecot/auth-master mail_plugins = sieve quota postmaster_address = postmaster(a)example.net quota_full_tempfail = yes } dovecot-mysql.conf driver = mysql connect = host=localhost dbname=mail user=user password=XXX default_pass_scheme = CRYPT password_query = SELECT password FROM users WHERE email = '%u' user_query = SELECT CONCAT('/var/vmail/',SUBSTRING_INDEX(email,'@',-1),'/',SUBSTRING_INDEX(email,'@',1),'/') AS home, CONCAT('maildir:/var/vmail/',SUBSTRING_INDEX(email,'@',-1),'/',SUBSTRING_INDEX(email,'@',1),'/Maildir/') AS mail, 5000 AS uid, 5000 AS gid, concat('*:bytes=', quota) AS quota_rule FROM users WHERE email = '%u' Any help is appreciated. Thanks Stefan Koenig

2 2

dovecot configuration oops
by Liam Parker 23 Mar '17

23 Mar '17

Hi, I've just transitioned from using courier to dovecot. Thanks for making this possible. During the 'quite simple' transition process, I didn't do much prep as I'm in more of a more of a fix-compile-fix-compile mode rather than a 'read all the docs first' so you may just want to give up now :) If you are still with me, I just wanted to say, it wasn't completely obvious that I needed a password and a user database [PAM not virtual]. Maybe that's just me but anyway, I spent longer than I should have trying to get PAM to work before eventually realising 'internal error check server logs' meant 'where's your user database'. I guess I assumed PAM could cover it all. If you are in to that kind of thing (usability), it might be sensible to have some kind of "basic errors" check during the config file parse phase which picks up stuff like this and points out a more specific error. I did check the logs vigorously and I even turn on every kind of debug_ (to the extent I started getting plain text passwords in the log!) but the 'internal server error check logs' was actually the only log entry for this issue. In case the point is still unclear, I would have spent less time running in the wrong direction if the error message had been "At least one user database must be configured" or some such. I completely understand if your philosophy is "read the manual or suffer the consequences" and it wasn't a complete fail but a simple up front config check could have helped. Thanks for your time today, Kind Regards, Liam

2 1