- dovecot - dovecot.org

[Dovecot] Random questions on backing up Dovecot
by Tabbed Out 11 Mar '13

11 Mar '13

Hi, I've read a few threads about the subject, but I am hoping someone can comment on a few misunderstandings that I might have? It seems like doing a tar of the mail folder location then rsyncing it over to the backup location is the general idea. I plan to have dovecot create 6 virtual users using Maildir, located at /var/mail. A few specifics I am unclear on: 1) Someone here gave a descriptive outline on this here: http://www.dovecot.org/list/dovecot/2011-August/060368.html It's a bit silly, but does anyone have any comments about his suggestion on doing a 'tar cvf' first, then doing a gzip on that archive? Are the benefits really that great? 2) My lack of understanding of control files and index files contribute to this question. If I want to move to a new server and I only tar'd my /var/mail, how does this affect control files? Is it as simple as just copying pasting back into /var/mail on the new server, and then Dovecot will create new UUIDs for the messages? 3) How do I handle the case where the script is currently tarring/gzipping the entire /var/mail, but I receive a new mail during that period? What happens if I use thunderbird to delete a mail during the archiving process?

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[Dovecot] zlib plugin bug?
by Jan Phillip Greimann 11 Mar '13

11 Mar '13

Hi there, got a problem with the zlib plugin, just wanted to test it on a test-mailserver, configured like in the wiki (http://wiki2.dovecot.org/Plugins/Zlib) and restarted the server. I've send an email to a blank maildir++ mailbox, the file is saved as gzip compressed file, but the "Z" flag is missing in the filename. Is that a bug in the plugin, or in dovecot? Greetings, Jan ------------------------------------------------------------- --- additional data: >>> find . ./dovecot-uidlist ./dovecot.mailbox.log ./tmp ./cur ./cur/1362746783.M97516P28534.s16,S=1321,W=1352:2,Sa ./maildirsize ./new ./dovecot.index.cache ./dovecot-keywords ./dovecot-uidvalidity.5139a483 ./subscriptions ./dovecot.index.log ./dovecot-uidvalidity ./dovecot-acl-list >>> file ./cur/1362746783.M97516P28534* ./cur/1362746783.M97516P28534.s16,S=1321,W=1352:2,Sa: gzip compressed data, from Unix >>> dpkg -l |grep dove ii debian-dovecot-auto-keyring 2010.01.30 GnuPG archive keys of the Automatic Dovecot Debian repository ii dovecot-common 2:2.2.0~rc2-0~auto+23 Transitional package for dovecot ii dovecot-core 2:2.2.0~rc2-0~auto+23 secure mail server that supports mbox, maildir, dbox and mdbox mailboxes ii dovecot-imapd 2:2.2.0~rc2-0~auto+23 secure IMAP server that supports mbox, maildir, dbox and mdbox mailboxes ii dovecot-lmtpd 2:2.2.0~rc2-0~auto+23 secure LMTP server for Dovecot ii dovecot-managesieved 2:2.2.0~rc2-0~auto+23 secure ManageSieve server for Dovecot ii dovecot-mysql 2:2.2.0~rc2-0~auto+23 MySQL support for Dovecot ii dovecot-pop3d 2:2.2.0~rc2-0~auto+23 secure POP3 server that supports mbox, maildir, dbox and mdbox mailboxes ii dovecot-sieve 2:2.2.0~rc2-0~auto+23 sieve filters support for Dovecot >>> doveconf -n # 2.2.rc2 (52e5d4186006): /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.7 ext3 auth_debug = yes auth_verbose = yes listen = * mail_debug = yes mail_gid = vmail mail_location = maildir:/var/vmail/%d/%n/Maildir:LAYOUT=fs mail_plugins = quota acl zlib mail_uid = vmail 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-sql.conf.ext driver = sql } plugin { acl = vfile acl_anyone = allow autocreate = Trash autocreate2 = Drafts autocreate3 = Sent autocreate5 = Archives autosubscribe = Trash autosubscribe2 = Drafts autosubscribe3 = Sent quota = maildir:User quota sieve = ~/.dovecot.sieve sieve_dir = ~/sieve zlib_save = gz zlib_save_level = 6 } protocols = " imap lmtp sieve pop3" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } } service dict { idle_kill = 1 hours unix_listener dict { group = vmail mode = 0660 } } service imap-login { inet_listener imap { port = 0 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service pop3-login { inet_listener pop3 { port = 0 } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = quota acl zlib sieve } protocol lda { mail_plugins = quota acl zlib sieve } protocol imap { mail_plugins = quota acl zlib imap_zlib imap_quota imap_acl autocreate }

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[Dovecot] virtual folder - crash while searching
by Matthias Rieber 10 Mar '13

10 Mar '13

Hi, I've upgraded from dovecot 2.0 to 2.1. When I perform a header search in a virtual folder dovecot crashes. Here's the stacktrace: http://pastebin.com/urSDDzku Regards, Matthias

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[Dovecot] When dovecot delivery, nested maildir (<user>/maildir/maildir) is "auto"created
by Nunzio Falcone 08 Mar '13

08 Mar '13

Scenario: Sogo/Mysql+Postfix+Dovecot(only IMAP)+LDAP (Active Directory) To make clean the understand of my issue I've performed those step go to /var/vmail/utente2 and perform in this directory "rm -rf *" After I send email to utente2 via "telenet localhost 25" I return to /var/vmail/utente2 and perform "ls -la" that shows me: maildir |-maildir |-cur |-new |-tmp but the expected results was |-maildir |-cur |-new |-tmp the relevant part of telnet session is: Mar 05 19:53:17 auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth Mar 05 19:53:17 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so Mar 05 19:53:17 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so Mar 05 19:53:17 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so Mar 05 19:53:17 auth: Debug: auth client connected (pid=3286) Mar 05 19:54:35 auth: Debug: master in: USER 1 utente2/maildir/(a)domain.local service=lda Mar 05 19:54:35 auth: Debug: master out: USER 1 utente2/maildir/(a)domain.local uid=500 gid=500 home=/var/vmail/utente2/maildir/(a)domain.local Mar 05 19:54:35 lda: Debug: auth input: utente2/maildir/(a)domain.local uid=500 gid=500 home=/var/vmail/utente2/maildir/(a)domain.local Mar 05 19:54:35 lda(utente2/maildir/(a)domain.local): Debug: Effective uid=500, gid=500, home=/var/vmail/utente2/maildir/(a)domain.local Mar 05 19:54:35 lda(utente2/maildir/(a)domain.local): Debug: Home dir not found: /var/vmail/utente2/maildir/(a)domain.local Mar 05 19:54:35 lda(utente2/maildir/(a)domain.local): Debug: maildir++: root=/var/vmail/utente2/maildir//maildir, index=, control=, inbox=/var/vmail/utente2/maildir//maildir Mar 05 19:54:35 lda(utente2/maildir/(a)domain.local): Debug: none: root=, index=, control=, inbox= Mar 05 19:54:35 lda(utente2/maildir/(a)domain.local): Info: msgid=<20130305185423.6E56B407B6(a)posta.domain.local>: saved mail to INBOX NB: note the wrong path of inbox inbox=/var/vmail/utente2/maildir//maildir From SOGO when I login the "autocreate" work well: in root folder of "utente2" I can see |-maildir |-cur |-new |-tmp But if I send email from SOGO frontend, same error of "telnetting" *What is wrong in my config?* dovecot -n # 2.0.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-279.el6.x86_64 x86_64 CentOS release 6.3 (Final) ext4 auth_debug = yes auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@/ auth_username_format = %Lu first_valid_gid = 500 last_valid_gid = 500 last_valid_uid = 500 log_path = /var/log/dovecot mail_debug = yes mail_location = maildir:/var/vmail/%n/maildir mbox_write_locks = fcntl passdb { driver = pam } postmaster_address = administrator(a)domain.local protocols = imap service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } } ssl = no ssl_cert = </etc/pki/dovecot/certs/dovecot.pem ssl_key = </etc/pki/dovecot/private/dovecot.pem userdb { args = uid=500 gid=500 home=/var/vmail/%Lu allow_all_users=yes driver = static } valid_chroot_dirs = /var/vmail /etc/postfix/master.cf (relevant) # Dovecot LDA dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver -f ${sender} -d ${recipient} /etc/postfix/ldap-groups.cf server_host = domain.local search_base = CN=users,DC=domain,DC=local bind = yes bind_dn = query(a)domain.local bind_pw = ********** query_filter = (&(objectclass=group) (mail=%s)) leaf_result_attribute = mail special_result_attribute = member version = 3 -- *Nunzio Falcone* nunzio.falcone(a)gmail.com *Cell * +39 320 1167923 *Voip*+39 081 0117933 *Fax * +39 081 0113049

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[Dovecot] Inotify max_user_instances
by Daniel L. Miller 08 Mar '13

08 Mar '13

Maybe I have multiple problems - dunno. I've started seeing the following log lines: Mar 7 07:46:22 bubba dovecot: imap(dmiller(a)amfes.com): Warning: Inotify instance limit for user 5000 (UID vmail) exceeded, disabling. Increase /proc/sys/fs/inotify/max_user_instances max_user_instances is currently 128. I've tried stopping and restarting dovecot - the message immediately returns. I could just increase max_user_instances - but I'd like to understand what the number SHOULD be and why simply restarting Dovecot doesn't fix it. If this issue is for user "vmail" this is used by mail services only - and I've only got a few users on my system. I'm also fighting a netfilter issue - my connection tracking counters keep climbing. Don't know if this is in any way related. -- Daniel

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Re: [Dovecot] Changin password in LDAP
by Steffen Kaiser 07 Mar '13

07 Mar '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, 20 Feb 2013, Arto Saraniva wrote: > We are using now dovecot 2.0.21 with open-ldap, but this situations has > already taken a quite long time. When user changes the password, we have > to reload dovecot every time, otherwise the change is ignored and > dovecot sees only the old password. Any ideas where the problem might > exist? does this help? http://wiki2.dovecot.org/Authentication/Caching?highlight=(auth_cache_ttl) - -- Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEVAwUBUSTb2l3r2wJMiz2NAQLp3gf8DM2xCn03yWoVrCjbYNZeflBNRLbD67gE zqvrKUOqkyyDbUl1lgNcJOG39MI2eZpbDXzyWZ8nzzCnPKGOF2mNN76vPGmf6ZrR AQ0EaiJaYRoE14BQykQGvBSnoXgcyW0Ue4Z2RcmIS0iILfGN+VODDKc9PitC99Rc RJb6dQPft3FLM3oWca6BI1OkUuIF9EJcK3M4ROwr84s+OAs/6rkxIDgCCIdh5JZ5 svOkUxVE38zod+Det3yBuoWo5HOXYiE9Qi9jKn8xjQl8a06snXRuw1QktsyLKLjc 64T7KFa5IfXaVzOXCIWiiPiN7T0BVJzJ8G1YbHMzFqYkiPNa4NIO2Q== =NDhf -----END PGP SIGNATURE-----

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[Dovecot] Migrating from CourierMail to Dovecot
by Robert Moskowitz 07 Mar '13

07 Mar '13

My current mail server is a Fedora12 system running postfix/mysql/couriermail/squirrelmail mix. My new server is a Centos6 running postfix/mysql/postfixadmin/dovecot/roundcube mix. I have 4 virtual domains and about 20 users; not a big setup by any measure. Both servers have the same host name, but are currently on separate subnets. My current plan is to stop services on the old server, switch them on subnets, rename the old server, and let 'slow users' drain the old server over a couple of days. Then I got to thinking, could I migrate the /home/vmail/domain/user/new folders from the old to new server? Not too many rsync commands to run to pull it off, but would that work? Is there something dovecot needs to do, and not just drop the files into the .../new folder? Or is there some utility to run to properly place the mail files? The file names are similar. Courier file names look like: 1362661301.Vfd01I2422e6M121970.klovia.htt-consult.com,S=17381 Whereas dovecot adds a ",W=nnn" string to the file name. I am assuming the content is otherwise the same. I would like to test out the migration, and then pull it off over a sunday. Due to meetings and holidays, this won't happen until early April, so I have time to work out the details. All guidance and pointers are greatly appreciated.

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[Dovecot] Ask about IMAP UID
by Shiquan Wang 07 Mar '13

07 Mar '13

Hi all, I am new to dovecot. I am trying to use offlineimap + dovecot + gnus for some emails on multiple machines. I need to use org-mode capture links on emails. I want to know if the same email will have the same IMAP UID on different machines given that they are synced by offlineimap to a local maildir and served by dovecot respectively. Best, Shiquan -- 王时全 Shiquan Wang ************************************************************************************** National Laboratory of Pattern Recognition (NLPR) Institute of Automation, Chinese Academy of Sciences(CASIA) No.95 ZhongGuanCun East Road, HaiDian District, Beijing, China, 100190 Tel: +86-10-62653768 Fax: +86-10-62551993 Email: sqwang(a)nlpr.ia.ac.cn / shiquanwang(a)gmail.com Homepage: http://www.cbsr.ia.ac.cn/users/sqwang/ **************************************************************************************

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[Dovecot] Upgrading 1.2 to 2.x
by Simon Brereton 06 Mar '13

06 Mar '13

Hi I'm about to upgrade to 2.1.7 in my test environment, but "doveconf -n -c dovecot.1.conf > dovecot.2.conf" is producing a blank file, so I am unsure how to proceed. I know a lot has changed between them, so I don't really want to have to start from scratch unless I have to. I have tried both as my user and with sudo. Simon

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[Dovecot] failing ssl authentication
by Ivars Strazdiņš 06 Mar '13

06 Mar '13

Hi, I have a fairly basic dovecot 2.0.19 configuration on Ubuntu 12.04 LTS server with self signed certificates and "ssl = required" option set. It had been working for years flawlessly (including upgrade from 1.x to 2.0.19). Please see full "dovecot -n" output at the end of this post. Until recently, new mail user agents (MUA) are having problems. I cannot pass the account creation step, MUA says that there is some problem. I tried to isolate the problem and did some testing with various combinations of MUA and OS and I am still confused where is the problem - in dovecot, self signed certificates (in operation since 2003, expires this summer), or MUA, or operating system. All tests done with IMAP. For example, Recent Thunderbird versions (>10) do not work at all on most OS'es (tried Windows, Linux, OS X). Actually, v10 does not let me setup an account, but there is a way to get through by clicking on Advanced button. Then the account in Thunderbird is created. After that all works fine and Thunderbird can even be upgraded to the latest version. Windows Live Mail 2012 (former Outlook Express) works on Windows XP and Windows 7, but fails on Windows 8. dovecot.log gets this: 2013-03-06 22:44:38 imap-login: Info: Disconnected (no auth attempts): rip=x.x.x.x, lip=y.y.y.y, TLS handshaking: Disconnected Outlook 2013 does not work in either Windows 7 or Windows 8. Dovecot log for Outlook 2013 looks good, but Outlook complains. 2013-03-06 18:38:22 imap-login: Info: Login: user=<ivarss>, method=PLAIN, rip=x.x.x.x lip=y.y.y.y, mpid=16801, TLS I enabled verbose_ssl = yes in dovecot configuration, and all failing attempts produce this type of log 2013-03-06 22:34:10 imap-login: Warning: SSL failed: where=0x2002: SSLv3 read client certificate A [x.x.x.x] What does this mean - a problem with certificate on the client side, MUA, that is? How could this be cured then? Thanks for your time and patience! Ivars doveconf -n output: # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-37-virtual x86_64 Ubuntu 12.04.2 LTS auth_mechanisms = plain login auth_socket_path = /var/run/dovecot/auth-master auth_verbose = yes default_process_limit = 300 info_log_path = /var/log/dovecot-info.log lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes log_path = /var/log/dovecot.log log_timestamp = "%Y-%m-%d %H:%M:%S " mail_fsync = never mail_location = maildir:~/Maildir:INBOX=~/Maildir:LAYOUT=fs mail_privileged_group = mail maildir_very_dirty_syncs = yes 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 { driver = pam } plugin { antispam_backend = mailtrain antispam_mail_notspam = --ham antispam_mail_sendmail = /usr/local/sbin/antispam.sh antispam_mail_sendmail_args = -f;%u(a)edited.domain antispam_mail_spam = --spam antispam_spam = junk antispam_trash = Trash autocreate = junk autocreate2 = Sent autocreate3 = Drafts autocreate4 = Trash autosubscribe = junk autosubscribe2 = Sent autosubscribe3 = Drafts autosubscribe4 = Trash fts = squat fts_squat = partial=4 full=10 mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = from, subject, flags, uid, box, msgid, size sieve = ~/roundcube.sieve sieve_dir = ~/sieve } postmaster_address = postmaster protocols = " imap sieve pop3" service auth-worker { client_limit = 0 } service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } unix_listener auth-master { group = musers mode = 0660 user = root } user = root } service imap { process_limit = 1024 } service pop3 { process_limit = 1024 } ssl = required ssl_cert = </etc/ssl/private/server.crt ssl_key = </etc/ssl/private/server.key userdb { driver = passwd } valid_chroot_dirs = /var/mail:/home protocol lda { mail_fsync = optimized mail_plugins = " sieve" } protocol imap { imap_client_workarounds = tb-lsub-flags delay-newmail tb-extra-mailbox-sep mail_max_userip_connections = 20 mail_plugins = " autocreate fts fts_squat antispam" } protocol pop3 { mail_plugins = " fts fts_squat" pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } protocol lmtp { mail_fsync = optimized mail_plugins = " sieve" } protocol sieve { 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 }

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