January 2012 - dovecot

[Dovecot] dsync conversion and ldap attributes
by Jan-Frode Myklebust 13 Jan '12

13 Jan '12

I have: mail_home = /srv/mailstore/%256RHu/%d/%n mail_location = maildir:~/:INDEX=/indexes/%1u/%1.1u/%u userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } and the dovecot-ldap.conf.ext specifies: user_attrs = mailMessageStore=home, mailLocation=mail, mailQuota=quota_rule=*:storage=%$ Now I want to convert individual users to mdbox using dsync, but how to I tell location2 to not fetch "home" and "mail" from ldap and use different mail_location (mdbox:~/mdbox) ? I.e. I want converted accounts stored in mail_location mdbox:/srv/mailstore/%256RHu/%d/%n/mdbox. -jf

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[Dovecot] more than 200 imap processes for one user
by Götz Reinicke 13 Jan '12

13 Jan '12

HI, recently I noticed, that our dovecot server (RH EL 5.7 dovecot-1.0.7-7.el5_7.1) 'fires' up a lot of imap processes only for one user. I counted 214 :-) most of tham in the 'S' state and are started nearly at the same time within 5 minutes. Usually users do have about 4 to 10 .... Dose anyone has an idea, what could be the cause? Thanks for any suggestion and best regards . Götz -- Götz Reinicke IT-Koordinator Tel. +49 7141 969 420 Fax +49 7141 969 55 420 E-Mail goetz.reinicke(a)filmakademie.de Filmakademie Baden-Württemberg GmbH Akademiehof 10 71638 Ludwigsburg www.filmakademie.de Eintragung Amtsgericht Stuttgart HRB 205016 Vorsitzender des Aufsichtsrats: Jürgen Walter MdL Staatssekretär im Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg Geschäftsführer: Prof. Thomas Schadt

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[Dovecot] proxy, managesieve and ssl?
by Nicolas KOWALSKI 12 Jan '12

12 Jan '12

Hello, On a dovecot 2.0.14 proxy, I found that proxying managesieve works well when using 'starttls' option in pass_attrs, but does not work when using 'ssl' option. The backend server is also dovecot 2.0.14; when using the ssl option, it reports "no auth attempts" in the logs about managesieve-login, and meanwhile the MUA, Thunderbird with sieve plugin, reports [TRYLATER] account is temporary disabled; no problem when using starttls option on the proxy, all works well. I would like to use IMAPs, instead of IMAP+STARTTLS, from proxy to backend, and have Managesieve still working. Is this supported? Thanks, -- Nicolas

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[Dovecot] could not start dovecot - unknown section type
by Daminto Lie 12 Jan '12

12 Jan '12

Hi, I was wondering if I could get some help with the following error when trying to start dovecot service on Ubuntu Server 10.04. The error message is as follows * Starting IMAP/POP3 mail server dovecot Error: Error in configuration file /usr/local/etc/dovecot/dovecot.conf line 15: Unknown section type Fatal: Invalid configuration in /usr/local/etc/dovecot/dovecot.conf [fail] I have just managed to upgrade it from 1.2.19 to 2.0.17. Then, I tried to start the dovecot by running the command $ sudo /etc/init.d/dovecot start And I received the above message. Below is the configuration for dovecot.conf # 2.0.17 (684381041dc4+): /usr/local/etc/dovecot/dovecot.conf # OS: Linux 2.6.32-37-generic-pae i686 Ubuntu 10.04.3 LTS ext4 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_username_format = %Lu auth_verbose = yes base_dir = /var/run/dovecot disable_plaintext_auth = no first_valid_uid = 1001 last_valid_uid = 2000 log_timestamp = "%Y-%m-%d %H:%M:%S " mail_location = maildir:/home/vmail/%u/Maildir mail_privileged_group = mail passdb { driver = pam } passdb { args = /usr/local/etc/dovecot/dovecot-ldap.conf driver = ldap } plugin { quota = maildir quota_rule = *:storage=3GB quota_rule2 = Trash:storage=20%% quota_rule3 = Spam:storage=10%% quota_warning = storage=95%% /usr/local/bin/quota-warning.sh 95 quota_warning2 = storage=80%% /usr/local/bin/quota-warning.sh 80 } protocols = imap service auth { unix_listener /var/run/dovecot-auth-master { group = vmail mode = 0660 user = vmail } unix_listener /var/spool/postfix/private/auth { group = mail mode = 0660 user = postfix } user = root } service imap-login { chroot = login executable = /usr/lib/dovecot/imap-login inet_listener imap { address = * port = 143 } user = dovecot } service imap { executable = /usr/lib/dovecot/imap } service pop3-login { chroot = login user = dovecot } ssl = no userdb { driver = passwd } userdb { args = uid=1001 gid=1001 home=/home/vmail/%u allow_all_users=yes driver = static } verbose_proctitle = yes protocol imap { imap_client_workarounds = delay-newmail mail_plugins = quota imap_quota } protocol pop3 { pop3_uidl_format = %08Xu%08Xv } protocol lda { auth_socket_path = /var/run/dovecot-auth-master mail_plugins = quota postmaster_address = postmaster(a)example.com rejection_reason = Your message to <%t> was automatically rejected:%n%r sendmail_path = /usr/lib/sendmail } Any help would be greatly appreciated. Thank you

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[Dovecot] Dovecot LDA and address extensions - folders flood
by huret deffgok 11 Jan '12

11 Jan '12

Hi list, This post is slightly OT, I hope no one will take offense. I was following the wiki on using dovecot LDA with postfix and implemented, for our future mail server, the address extensions mechanism: an email sent to "validUser+foldername(a)mydomain.com" will have dovecot-lda automagically create and subscribe the "foldername" folder. With some basic scripting I was able to create hundreds of folders in a few seconds. So my question is how do you implement this great feature in a secure way so that funny random people out there cant flood your mailbox with gigatons of folder. Thanks, kfx

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[Dovecot] Log imap commands
by forumer＠smartmobili.com 11 Jan '12

11 Jan '12

Hi, I am trying to optimize an imap library and I am comparing with some existing webmail, for instance from roundcube I can log the imap commands with the following format : [11-Jan-2012 14:22:55 +0100]: [DBD1] S: * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5] Dovecot ready. [11-Jan-2012 14:22:55 +0100]: [DBD1] C: A0001 ID ("name" "Roundcube Webmail" "version" "0.6" "php" "5.3.5-1ubuntu7.4" "os" "Linux" "command" "/") [11-Jan-2012 14:22:55 +0100]: [DBD1] S: * ID NIL [11-Jan-2012 14:22:55 +0100]: [DBD1] S: A0001 OK ID completed. [11-Jan-2012 14:22:55 +0100]: [DBD1] C: A0002 AUTHENTICATE CRAM-MD5 [11-Jan-2012 14:22:55 +0100]: [DBD1] S: + RDM1MTE1NjkxOTQzODE4NDEuMTMyNjI4ODE3NUBzZC0zMDYzNT4= [11-Jan-2012 14:22:55 +0100]: [DBD1] C: d2ViZ3Vlc3RAc21hcnRtb2JpbGkuY29tIDczODMxNjUzZmVlYzdjNDVlNzRkYTg1YjIwMjk2NWM0 [11-Jan-2012 14:22:55 +0100]: [DBD1] S: A0002 OK [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 FUZZY] Logged in [11-Jan-2012 14:22:55 +0100]: [DBD1] C: A0003 NAMESPACE [11-Jan-2012 14:22:55 +0100]: [DBD1] S: * NAMESPACE (("" ".")) NIL NIL [11-Jan-2012 14:22:55 +0100]: [DBD1] S: A0003 OK Namespace completed. [11-Jan-2012 14:22:55 +0100]: [DBD1] C: A0004 LOGOUT [11-Jan-2012 14:22:55 +0100]: [DBD1] S: * BYE Logging out ... And now I would like to do the same from my imap library so I have started wireshark but it's a bit messy and difficult to compare. I was wondering if dovecot allows to log imap communications ? Thanks

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[Dovecot] How to solve a "Connection queue full problem" - dovecot version 2.0.16
by Didier Gervaise 11 Jan '12

11 Jan '12

Hello, I put in production dovecot yesterday. After an hour, nobody could log in ("Max number of imap connection" error message on Thunderbird) Afterward, I found these messages in the logs: Jan 10 09:21:20 mailsrv dovecot: [ID 583609 mail.info] imap-login: Disconnected: Connection queue full (no auth attempts): rip=xxx.xxx.xxx.xxx, lip=xxx.xxx.xxx.xxx In the panic, I changed these values in /usr/local/etc/dovecot/conf.d/10-master.conf default_process_limit = 20000 default_client_limit = 20000 This apparently solved the problem but now I have these messages when I start dovecot: Jan 11 14:41:08 mailsrvspare dovecot: [ID 583609 mail.info] master: Dovecot v2.0.15 starting up Jan 11 14:41:08 mailsrvspare dovecot: [ID 583609 mail.warning] config: Warning: service auth { client_limit=4096 } is lower than required under max. load (103024) Jan 11 14:41:08 mailsrvspare dovecot: [ID 583609 mail.warning] config: Warning: service anvil { client_limit=20000 } is lower than required under max. load (60003) What should I do ? - adding "service_count = 0" in service imap-login { ... } and removing the modifications I did in 10-master.conf ? or - should I configure differently default_process_limit and default_client_limit ? It is a small site (about 1000 users). Currently I have 666 imap processes and 136 imap-login processes. Additionnal infos: The Server is a Solaris 10 Sun X4540 32GB RAM mailsrv:~ % /usr/local/sbin/dovecot -n # 2.0.16: /usr/local/etc/dovecot/dovecot.conf doveconf: Warning: service auth { client_limit=4096 } is lower than required under max. load (103024) doveconf: Warning: service anvil { client_limit=20000 } is lower than required under max. load (60003) # OS: SunOS 5.10 i86pc default_client_limit = 20000 default_process_limit = 20000 disable_plaintext_auth = no first_valid_uid = 100 mail_debug = yes mail_plugins = " quota" mail_privileged_group = mail 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 { quota = maildir:User quota quota_rule = ?:storage=4G quota_rule2 = Trash:storage=+100M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=90%% quota-warning 90 %u quota_warning3 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_dir = ~/ } postmaster_address = postmaster(a)esrf.fr protocols = imap pop3 lmtp sieve service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 } } service imap { process_limit = 2000 } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { port = 995 } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh unix_listener quota-warning { user = dovecot } user = dovecot } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = passwd } protocol lda { mail_plugins = " sieve" } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep mail_plugins = " quota imap_quota" } Best Regards -- ________________________________________________________ Didier GERVAISE didier.gervaise(a)esrf.fr 04 76 88 27 28 System Administrator ---- Computing Services ESRF 6 rue Jules Horowitz 38043 Grenoble Cedex 09 ________________________________________________________

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[Dovecot] Providing shared folders with multiple backend servers
by Sven Hartge 11 Jan '12

11 Jan '12

Hi *, I am currently in the planning stage for a "new and improved" mail system at my university. Right now, everything is on one big backend server but this is causing me increasing amounts of pain, beginning with the time a full backup takes. So naturally, I want to split this big server into smaller ones. To keep things simple, I want to pin a user to a server so I can avoid things like NFS or cluster aware filesystems. The mapping for each account is then inserted into the LDAP object for each user and the frontend proxy (perdition at the moment) then uses this information to route each access to the correct backend storage server running dovecot. So far this has been working nice with my test setup. But: I also have to provide shared folders for users. Thankfully users don't have the right to share their own folders, which makes things easier (I hope). Right now, the setup works like this, using Courier: - complete virtual mail setup - global shared folders configured in /etc/courier/shared/index - inside /home/shared-folder-name/Maildir/courierimapacl specific user get access to a folder - each folder a user has access is mapped to the namespace #shared like #shared.shared-folder-name Now, if I split my backend storage server into multiple ones and user-A is on server-1 and user-B is on server-2, but both need to access the same shared folder, I have a problem. I could of course move all users needing access to a shared folder to the same server, but in the end, this will be a nightmare for me, because I forsee having to move users around on a daily basis. Right now, I am pondering with using an additional server with just the shared folders on it and using NFS (or a cluster FS) to mount the shared folder filesystem to each backend storage server, so each user has potential access to a shared folders data. Ideas? Suggestions? Nudges in the right direction? Grüße, Sven. -- Sigmentation fault. Core dumped.

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[Dovecot] Dovecot under Virtual Host environment??
by sparkietm 10 Jan '12

10 Jan '12

Hi all, Could anyone point me to a walk-through of setting up Dovecot for multiple domains under a Virtual Host environment? I'd like to offer clients their own email domain for each virtual host e.g john(a)client_1.com, sue(a)client_2.com. I'm guessing this is fairly common set-up, but a search on "multiple domains" didn't bring much back. Also, would it be possible to offer each client webmail? Many thanks in advance Mark -- View this message in context: http://old.nabble.com/Dovecot-under-Virtual-Host-environment---tp33114381p3… Sent from the Dovecot mailing list archive at Nabble.com.

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[Dovecot] dsync panic
by Jürgen Obermann 10 Jan '12

10 Jan '12

Hello, when I try to convert from mbox to mdbox with dsync with one user it always panics: # /opt/local/bin/dsync -v -u userxy backup ssh root@minerva1 /opt/local/bin/dsync -v -u userxy dsync-local(userxy): Info: Papierkorb: uidnext changed: 161 != 1 dsync-local(userxy): Info: INBOX: uidnext changed: 9139 != 9105 dsync-local(userxy): Info: Trash: uidnext changed: 3924 != 3915 dsync-local(userxy): Info: Drafts: uidnext changed: 1563 != 1 dsync-local(userxy): Info: Gesendet: uidnext changed: 369 != 1 dsync-local(userxy): Info: Sent: uidnext changed: 1955 != 1 dsync-remote(userxy): Panic: Trying to allocate 2147483648 bytes dsync-remote(userxy): Error: Raw backtrace: 0xff14bc30 -> 0xff1658c0 -> 0xff15744c -> 0xff157520 -> 0xff159d90 -> 0xff156540 -> 0xff15cf5c -> 0xff156540 -> 0xff157100 -> 0xff16d158 -> 0xff16cfe8 -> 0xff26e350 -> 0x251c4 -> 0x2547c -> 0x21110 -> 0x20494 -> 0x1f230 -> 0x1f3d4 -> 0xff15e46c -> 0xff15f738 -> 0xff15e530 -> 0xff140ec8 -> 0x1525c -> 0x14608 Abort dsync-local(userxy): Error: read() from worker server failed: EOF dsync-local(userxy): Error: Unexpected reply from server: My local configuration is: # /opt/local/bin/doveconf -n # 2.0.16: /opt/local/etc/dovecot/dovecot.conf # OS: SunOS 5.10 sun4v auth_verbose = yes disable_plaintext_auth = no lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes listen = imap.hrz.uni-giessen.de localhost mail_fsync = always mail_location = mbox:~/Mail:INBOX=/var/mail/%u mail_nfs_index = yes mail_nfs_storage = yes mail_plugins = mail_log notify zlib 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 mmap_disable = yes namespace { inbox = yes location = prefix = separator = / type = private } namespace { hidden = yes list = no location = prefix = Mail/ separator = / subscriptions = yes type = private } passdb { driver = pam } passdb { args = /opt/local/etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { autocreate = Trash autocreate2 = caughtspam autocreate3 = Sent autocreate4 = Drafts autosubscribe = Trash autosubscribe2 = caughtspam autosubscribe3 = Sent autosubscribe4 = Drafts mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } postmaster_address = postmaster(a)hrz.uni-giessen.de quota_full_tempfail = yes sendmail_path = /usr/lib/sendmail service auth { client_limit = 11120 } service imap-login { process_min_avail = 16 service_count = 0 vsz_limit = 640 M } service imap { process_limit = 4096 vsz_limit = 1 G } ssl_cert = </etc/ssl/imap_hrz.crt ssl_key = </etc/ssl/imap_hrz.key syslog_facility = local0 userdb { driver = passwd } version_ignore = yes protocol lda { info_log_path = log_path = mail_plugins = mail_log notify zlib sieve } protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags mail_max_userip_connections = 20 mail_plugins = mail_log notify zlib autocreate imap_zlib } protocol lmtp { mail_plugins = mail_log notify zlib sieve } protocol pop3 { pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_uidl_format = %08Xv%08Xu } On the remote side the configuration is # 2.0.16: /opt/local/etc/dovecot/dovecot.conf # OS: SunOS 5.10 sun4u zfs auth_debug = yes auth_debug_passwords = yes auth_verbose = yes disable_plaintext_auth = no lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes listen = minerva1.hrz.uni-giessen.de mail_debug = yes mail_fsync = always mail_location = mdbox:/sanpool/mail%h/mdbox mail_nfs_index = yes mail_nfs_storage = yes mail_plugins = mail_log notify quota zlib 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 mdbox_rotate_interval = 1 days mdbox_rotate_size = 16 M mmap_disable = yes namespace { inbox = yes location = prefix = separator = / type = private } namespace { hidden = yes list = no location = prefix = Mail/ separator = / subscriptions = yes type = private } namespace { location = maildir:/var/mail/public:CONTROL=/sanpool/mail/%u/Maildir/public:INDEX=/sanpool/mail/%u/Maildir/public prefix = Public/ separator = / subscriptions = no type = public } passdb { driver = pam } passdb { args = /opt/local/etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { autocreate = Trash autocreate2 = caughtspam autocreate3 = Sent autocreate4 = Drafts autosubscribe = Trash autosubscribe2 = caughtspam autosubscribe3 = Sent autosubscribe4 = Drafts fts = squat mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size quota = fs:Home-Verzeichnis:noenforcing zlib_save = gz zlib_save_level = 3 } postmaster_address = postmaster(a)hrz.uni-giessen.de quota_full_tempfail = yes sendmail_path = /usr/lib/sendmail service auth { client_limit = 11120 } service imap-login { process_min_avail = 16 service_count = 0 vsz_limit = 640 M } service imap { process_limit = 4096 vsz_limit = 1 G } ssl_cert = </etc/ssl/server.crt ssl_key = </etc/ssl/server.key syslog_facility = local0 userdb { driver = passwd } version_ignore = yes protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags mail_max_userip_connections = 20 mail_plugins = mail_log notify quota zlib autocreate fts fts_squat imap_quota imap_zlib } protocol lda { info_log_path = log_path = mail_plugins = mail_log notify quota zlib sieve } protocol lmtp { mail_plugins = mail_log notify quota zlib sieve } protocol pop3 { pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_uidl_format = %08Xv%08Xu } Thank you, Jürgen Obermann Hochschulrechenzentrum der Justus-Liebig-Universität Gießen Heinrich-Buff-Ring 44 Tel. 0641-9913054

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