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[Dovecot] Dovecot - with LDAP auth backend
by Shahmat Dahlan 19 Mar '07

19 Mar '07

I have the following installed (1) CentOS 2.6.9-42.ELsmp (2) dovecot-1.0-3_50.rc27.el4.at, (3) openldap-2.2.13-6.4E (A) I have added the following schema into /etc/openldap/schema attributetype ( 1.3.6.1.4.1.14237.1.1.1.1 NAME 'mailquota' DESC 'The size of space the user can have until further messages get bounced.' EQUALITY integerMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 SINGLE-VALUE ) objectclass ( 1.3.6.1.4.1.14237.1.1.2.1 NAME 'DovecotUser' DESC 'Dovecot-LDAP User' SUP top AUXILIARY MUST ( cn $ uid $ mail $ mailquota $ userPassword ) MAY ( sn ) ) (B) and added this into my /etc/openldap/slapd.conf include /etc/openldap/schema/dovecot.schema (C) And in my /etc/dovecot.conf, this is what I have protocol imap { mail_plugins = quota imap_quota mail_plugin_dir = /usr/lib/dovecot/imap } (D) also in my /etc/dovecot.conf plugin { quota = maildir:storage=10240 } (E) in my /etc/dovecot-ldap.conf user_attrs = homeDirectory=home,uidNumber=uid,gidNumber=gid,mailquota=quota user_filter = (&(objectClass=DovecotUser)(uid=%u)) pass_attrs = uid=user,userPassword=password Scenario 1 I have (D) set to quota = maildir:storage=10240, did a telnet localhost 143, and logged in, this is what I get Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. * OK Mail ready a1 login ldapuser password a1 OK Logged in. a2 getquota "" * QUOTA "" (STORAGE 0 10240) a2 OK Getquota completed. if I were to change (D) to quota = maildir And added in an attribute called "mailquota" in the entry uid=ldapuser,dc=mydomain,dc=com, give it a value 10240000 (is this correct? should it by in bytes or in kilobytes?), then reinitialize the mailbox by deleting the ~/Maildir directory (or in this case /home/ldapuser/Maildir) Did the telnet localhost 143, this is what I get instead Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. * OK Mail ready a1 login ldapuser password a1 OK Logged in. a2 getquota "" * QUOTA "" () a2 OK Getquota completed. Even after I've added the attribute mailquota in the ldap for the entry uid=ldapuser it still does not look like its taking any effect at all. Regards and thanks in advance.

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[Dovecot] using sieve plugin
by Kendall Shaw 19 Mar '07

19 Mar '07

Hi, I have installed dovecot on ubuntu edgy linux by retrieving the source debian package, building and installing the package and then building and installing the sieve plugin. However, I get no log messages indicating errors and as far as I can tell, my .dovecot.sieve script is not being used. I have introduced a syntax error in the script and see no error message. In dovecot.conf I have: log_path = /var/log/dovecot.log invo_log_path = /var/log/dovecot.log protocol lda { module_dir = /usr/lib/dovecot/modules/lda mail_plugins = cmusieve log_path = /var/log/dovecot-deliver.log info_log_path = /var/log/dovecot-deliver.log } I am using exim with dovecot. I've tried using a .forward file (I'm the one user on the computer). Alternately, I've tried creating the dovecot_deliver "transport" in exim and changing the localuser router to use it. Still, I get no messages from deliver and no error messages from dovecot or exim. The file dovecot-deliver.log is not created. Do you have any suggestions that can help me get it working or to see why it is not working? Kendall

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[Dovecot] One user having reproducible IMAP issues
by Alex Boster 19 Mar '07

19 Mar '07

Dovecot version upgraded to 1.0r26 (did not fix problem). The server is a CentOS 4 x86 box. Using ext3 filesystem. Previous attempts to fix the issue have included simply moving aside the user's INBOX to recreating a new account from scratch. Sometimes the email behaves for a while, but within a day is not working again. In Mail.app (the user's usual mail client) the INBOX folder simply appears empty. mutt (run locally on the server) shows the messages there correctly. The problem is easily reproducible. Move /var/spool/mail/[username] to a backup file and remove all .imap directories for that user. Mail may work for a while, but will stop within 24 hours. The SquirrelMail message is: ERROR: The server couldn't find the message you requested. Most probably your message list was out of date and the message has been moved away or deleted (perhaps by another program accessing the same mailbox). Click here to return to INBOX dovecot -n : # /etc/dovecot.conf log_path: /var/log/dovecot.log info_log_path: /var/log/dovecot.debug.log login_dir: /var/run/dovecot/login login_executable(default): /usr/libexec/dovecot/imap-login login_executable(imap): /usr/libexec/dovecot/imap-login login_executable(pop3): /usr/libexec/dovecot/pop3-login mail_location: mbox:~/mail:INBOX=/var/spool/mail/%u mail_full_filesystem_access: yes mail_executable(default): /usr/libexec/dovecot/rawlog /usr/libexec/ dovecot/imap mail_executable(imap): /usr/libexec/dovecot/rawlog /usr/libexec/ dovecot/imap mail_executable(pop3): /usr/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/lib/dovecot/imap mail_plugin_dir(imap): /usr/lib/dovecot/imap mail_plugin_dir(pop3): /usr/lib/dovecot/pop3 auth default: mechanisms: plain login passdb: driver: pam args: dovecot userdb: driver: passwd Thanks! Alex

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[Dovecot] authenticating with LDAP and SSL
by Nathan Fiedler 19 Mar '07

19 Mar '07

I managed to configure Dovecot to use a local OpenLDAP server to authenticate clients, without using SSL. However, I would rather that LDAP is accessed using SSL, but I cannot get Dovecot to connect. All that I did was change "uris" to "ldaps://localhost", and this appears in the maillog: Mar 18 12:53:00 server dovecot: Dovecot v1.0.rc15 starting up Mar 18 12:53:01 server dovecot: auth(default): ldap_bind((null)) failed: Can't contact LDAP server Is there additional configuration that is needed for SSL? Note that I altered the slapd.conf file from not requiring SSL to requiring SSL when I changed the "uris" parameter. And, of course, accessing the directory using ldapsearch works just fine. It seems that there's only a problem when using SSL, but I don't know how to debug it. Thanks n

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[Dovecot] Kerberos
by forum 18 Mar '07

18 Mar '07

Hey all new to this crack Ok so i have setup kerosene on my server i run mutt and it goes off and gets kerberos key from server I have added teh gssapi to config file but when the key seams to want to authenticate off dovecot it fail anyone help me? Mutt is returning No authentication available Dovecot logs are returning: Mar 18 01:34:31 bandicoot dovecot: auth(default): gssapi(?,MYIPADDRESS): While acquiring service credentials: Miscellaneous failure Mar 18 01:34:31 bandicoot dovecot: auth(default): gssapi(?,MYIPADDRESS): While acquiring service credentials: No principal in keytab matches desired name Mar 18 01:34:34 bandicoot dovecot: imap-login: Aborted login: method=GSSAPI, rip=MYIPADDRESS, lip=MYIPADDRESS, TLS Thanks

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[Dovecot] 1.0.rc27 released
by Timo Sirainen 18 Mar '07

18 Mar '07

http://dovecot.org/releases/dovecot-1.0.rc27.tar.gz http://dovecot.org/releases/dovecot-1.0.rc27.tar.gz.sig A few new small features and lots of index/mbox fixes. I've been heavily stress testing this release, so I think it should be about perfect. :) I think the only thing still missing from v1.0 is documentation. There are some unwritten pages in the wiki, and I still haven't bothered to write the wiki -> doc/*.txt conversion script. The script will probably be pretty easy, but writing the docs can take a while. + mbox and index file code handles silently out of quota/disk space errors (maildir still has problems). They will give the user a "Not enough disk space" error instead of flooding the log file. + Added fsync_disable setting. + mail-log plugin: Log the mailbox name, except if it's INBOX + dovecot-auth: Added a lot more debug logging to passdbs and userdbs + dovecot-auth: Added %c variable which expands to "secured" with SSL/TLS/localhost. + dovecot-auth: Added %m variable which expands to auth mechanism name - maildir++ quota: With ignore=box setting the quota was still updated for the mailbox even though it was allowed to go over quota (but quota recalculation ignored the box). - Index file handling fixes - mbox syncing fixes - Wrong endianess index files still weren't silently rebuilt - IMAP quota plugin: GETQUOTAROOT returned the mailbox name wrong the namespace had a prefix or if its separator was non-default - IMAP: If client was appending multiple messages with MULTIAPPEND and LITERAL+ extensions and one of the appends failed, Dovecot treated the rest of the mail data as IMAP commands. - If mail was sent to client with sendfile() call, we could have hanged the connection. This could happen only if mails were saved with CR+LF linefeeds.

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Re: [Dovecot] Login processes and a new performance/security compromise [was: Re: pre-1.0.rc27: Index and mbox fixes]
by Bill Boebel 18 Mar '07

18 Mar '07

On Sat, March 17, 2007 10:51 pm, Timo Sirainen <tss(a)iki.fi> said: > Oh, and as for when the rewrite is in CVS, I'm not really sure. I'm > still wondering if I should put it there soon and make the release after > v1.0 be v2.0, or if I should first stabilize the current new CVS HEAD > features (which shouldn't take too long), do a v1.2 release and only > then put this code to CVS and make it v2.0.. I vote for first stabilizing the current new CVS HEAD, do a v1.1 release, and then put the ssl rewrite into CVS and plan to make that either v1.2 or v2.0. That way people will start banging on the new features in current CVS HEAD sooner. Bill

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[Dovecot] Connection closed by foreign host.
by tubauwe＠gmx.de 18 Mar '07

18 Mar '07

I installed dovecot on my system using the following configuration (in dovecot.conf): protocols = imap listen = * ssl_disable = yes login_user = nobody login_processes_count = 3 mail_extra_groups = nobody default_mail_env = maildir:/home/%u/Maildir auth default { mechanisms = plain passdb shadow { } userdb passwd { } user = root } After that I tested via telnet an got the message: Connection closed by foreign host. In the log-file I found the following lines: dovecot: Mar 12 22:49:18 Info: Dovecot v1.0.rc15 starting up dovecot: Mar 12 22:51:12 Info: imap-login: Login: user=<username>, method=PLAIN, rip=192.168.??.20, lip=192.168.??.3 dovecot: Mar 12 22:51:12 Error: setmntent(/etc/mtab) failed: No such file or directory dovecot: Mar 12 22:51:12 Error: child 616 (imap) killed with signal 11 Because I'm quite a newbie, I don't know what to do. Therefore I ask here for help. Thank you! -- "Feel free" - 5 GB Mailbox, 50 FreeSMS/Monat ... Jetzt GMX ProMail testen: www.gmx.net/de/go/mailfooter/promail-out

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[Dovecot] M-Box benchmark
by Maykel Moya 18 Mar '07

18 Mar '07

A friend of mine passed me this[1] cause I'm recommending him Dovecot. My personal experience is very different to the one in that benchmark. I will appreciate similar links from those of you who had benchmarked Dovecot against other IMAP servers. I'm conscious that my personal experience is far to be a objetive comparison. I switched from UW-Imap/Mbox to Dovecot/Maildir a box with 45k local users, 3.5MB/s sustained IMAP/POP traffic in work hours. The main performance gain is from mbox -> maildir switching. Anyway the users (and myself) "perceive" a good performance with the new setup. Regards, maykel [1] http://www.isode.com/whitepapers/mbox-benchmark.html

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[Dovecot] pre-1.0.rc27: Index and mbox fixes
by Timo Sirainen 18 Mar '07

18 Mar '07

I've been doing some stress testing in the last few days and fixing all the errors I saw. I'm hoping that I've finally really fixed all the index/mbox problems. So, again I think the only thing left for v1.0 is the documentation. Please test this nightly snapshot before I'll release rc27 tomorrow: http://dovecot.org/nightly/dovecot-latest.tar.gz If you've seen any of the following error messages in log files, these should all be fixed now: - index: Append with UID 56297, but next_uid = 56298 - mbox: UID inserted in the middle of mailbox /home/tss/mail/inbox (45769 > 45768, seq=28, idx_msgs=30) - mbox: Expunged message reappeared in mailbox /home/tss/mail/inbox (UID 86957 < 86958, seq=28, idx_msgs=27) These should be fixed for most cases, but they can still rarely happen: - index: Extension reset without intro prefix There's a really tiny possibility of it still happening with mmap_disable=no, but I think it's practically fixed now. A proper fix would require more changes than I want to do for v1.0 (either support for marking transaction start/end positions or getting rid of the stupid intro prefix completely). - Cached message offset 38340 is invalid for mbox file /home/tss/mail/inbox This should happen only if you're using in-memory indexes or mbox_min_index_size isn't 0. This happens if the mbox file's timestamp and file size are the exact same after some expunges+appends, so the only way to properly fix it would be to wait a second and update the mtime before unlocking the mbox file after expunges. This sleep is actually already done when Dovecot notices that a) mtime and size really are the same after modification and b) mails have been moved around inside the file (ie. flag changes were done but there weren't enough empty space in the mail's own headers so mails had to be moved to get the needed space). Should be pretty rare. Anyway, this error is completely invisible to users and it doesn't have any other side effects that mbox_dirty_syncs doesn't already have. The whole error message could even be removed if it's going to become a problem.. Other changes in the snapshot: + mail-log plugin: Log the mailbox name, except if it's INBOX + dovecot-auth: Added a lot more debug logging passdbs and userdbs + dovecot-auth: Added %c variable which expands to "secured" with SSL/TLS/localhost. + dovecot-auth: Added %m variable which expands to auth mechanism name - Wrong endianess index files still weren't silently rebuilt - IMAP quota plugin: GETQUOTAROOT returned the mailbox name wrong the namespace had a prefix or if its separator was non-default

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