- dovecot - dovecot.org

[Dovecot] Dovecot auth GSSAPI
by Eduardo Sachs 09 Jan '08

09 Jan '08

Hi, I have Heimdal Kerberos with authentication in my Samba PDC, Postfix and OpenLDAP, it is perfect. But, I have problem with authentication GSSAPI of Dovecot. I install a service ticket of the form imap/mailserver.domain.com@REALM, imap/mailserver@REALM, pop/mailserver.domain.com@REALM and pop/mailserver@REALM and /etc/krb5.keytab for this services tickets. Debug in my messages log: Jan 9 15:14:32 mailserver dovecot: auth(default): client in: AUTH^I1^IGSSAPI^Iservice=IMAP^Ilip=192.168.0.71^Irip=192.168.0.212 Jan 9 15:14:32 mailserver dovecot: auth(default): gssapi(?,192.168.0.212): Obtaining credentials for imap@mailserver Jan 9 15:14:32 mailserver dovecot: auth(default): gssapi(?,192.168.0.212): While importing principal name: An invalid name was supplied Jan 9 15:14:33 mailserver dovecot: auth(default): client out: FAIL^I1^Itemp Jan 9 15:14:33 mailserver dovecot: imap-login: Aborted login: method=GSSAPI, rip=192.168.0.212, lip=192.168.0.71 Someone knows solve this problem? Or, it is a bug? Thanks!!!

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[Dovecot] dovecot upgrade
by Paul A 08 Jan '08

08 Jan '08

Hi, I'm currently using Dovecot version 1.0 and I want to update it to the latest version. I know from version .99 to version 1.0 I had to change a few things on the dovecot config. When compiling the latest stable version should I just be able to use the same config I'm using for version 1.0 without making any changes ? Thank you Paul

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[Dovecot] Dovecot too many open files???
by Tim Tyler 08 Jan '08

08 Jan '08

Dovecot experts, We just recently deployed Dovecot 1.0.rc15 on a Redhat 5 system. I have over 1400 users. At first it appeared to work fine. But soon, we had complaints of students that couldn't retrieve their email. I looked in the logs and found this error. Jan 7 22:27:31 stu dovecot: auth(default): pam(pucklisl,<http://144.89.40.6>144.89.40.6): pipe() failed: Too many open files We are running Dovecot to authenticate via pam which authenticates ldap. Below is the output of [root@stu ~]# dovecot -n # /etc/dovecot.conf listen: * ssl_cert_file: /etc/mail/certs/server.pem ssl_key_file: /etc/mail/certs/server.key 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 login_process_size: 512 login_max_processes_count: 32 mail_location: mbox:%h/mail:INBOX=/var/spool/mail/%u mail_executable(default): /usr/libexec/dovecot/imap mail_executable(imap): /usr/libexec/dovecot/imap mail_executable(pop3): /etc/custom-pop3.sh 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: passdb: driver: pam userdb: driver: passwd Any solutions for this problem? Tim Tyler Network Engineer - Beloit College tyler(a)beloit.edu

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[Dovecot] (somewhat ot?) purging old maildir messages
by Matt LaPlante 08 Jan '08

08 Jan '08

I'm using Dovecot (+postfix) to host some personal imap accounts on a private server (Maildir format). I've got one account that receives mostly automated mails, and I want to be able to purge messages beyond a given date (say 30 days). I know that since maildir uses flat files, I can literally just delete messages doing something similar to the following with bash: for i in $(find /var/spool/vmail/host1/user/cur/ -mtime +30); do rm $i done I dislike this approach for a few reasons. First, and most plainly, it seems crude. When running complex server software, its rarely a good idea in the field of systems administration to be bluntly deleting files out from under the running applications. It feels wrong. How does this affect dovecot's monitoring of the files and indexing? What if the files happen to be open in an email client? Etc. Emotions aside, I also very much dislike running an automated 'rm' that has the power to wipe out a lot of my email if something goes pearshaped with the script. I can think of several possible solutions that don't require subversive operations on the maildirs, but I've never used them and therefore don't know if they're actually feasible: - Use a tool designed to manipulate maildirs. Something akin to postfix's postqueue and postsuper tools come to mind, but I don't know if such an app exists. - Use a setting within dovecot that expires old maildir data. As I understand it this will be available in 1.1 (yay!); unfortunately that's not an option for me until 1.1 is available as stable in my server os. - Use a scriptable mua that has the capability to check mail under said account and automatically delete based on age. I know very little of tools in this area, so again I don't know if such an application exists. Any pointers you might have would be much appreciated. Thanks, Matt

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[Dovecot] Problem with passwords surrounded by curly braces
by Frank Kintrup 08 Jan '08

08 Jan '08

Hello, one of my users set his password to something surrounded by curly braces, and promptly all access to his mailbox was refused. After looking through the logs I found an entry "Unknown password scheme xxxx", where "xxxx" is the user's password, but without the curly braces. I then browsed through the documentation and there was explained that it is possible to prefix the password with the password scheme in curly braces, like "{PLAIN}xxxx" where xxxx is the password itself. Manually altering the users password in the database to "{PLAIN}xxxx" (where "xxxx" is the user's password WITH curly braces) fixed this problem for me at this time, but the time a user chooses such a strange password I would have to edit the table again. So in my opinion the {SCHEME}-prefix is not a useful thing. Why would anyone need it, anyway? Shouldn't all passwords have the same scheme which is set in the dovecot.conf file once? If the feature is indeed used: with a database lookup it should be replaced by an optional database field or, if that's not possible, it should be possible to disable this feature from the config file. Frank

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[Dovecot] What's the difference between mbox and maildir
by Andrew Falanga 08 Jan '08

08 Jan '08

I'm a little confused about some of these terms. What is: .imap/.imap/ (other than directories) mbox INBOX (I think I have this one) maildir ??????? I'm not sure how all of these things work together. Thanks, Andy

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[Dovecot] Please help me resolve why mail isn't being delivered to virtual users
by Andrew Falanga 08 Jan '08

08 Jan '08

follow up: I forgot to mention, that I discovered my system doesn't appear to have procmail on it. So, I'm not sure what must be done for delivery of mail concerning that "LDA/Sendmail" dovecot WIKI page. Andy

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[Dovecot] assertion with outlook
by Guenther Sommer 08 Jan '08

08 Jan '08

i saw two crashes in my syslog with dovecot, and google did not report any known problems. i have no problems using dovecot, thus bugreport is just for information. following information: ubuntu gutsy gibbon server amd64 ext3 outlook 2003 & 2007, just retrieving mails. mails have been migrated via imapsync 2 days before to this server. dovecot is imap-server and LDA. has been seen with two different users, following syslog entries: Jan 7 18:27:01 siege dovecot: IMAP(userA): file strfuncs.c: line 165 (p_strndup): assertion failed: (max_chars != (size_t)-1) Jan 7 18:27:01 siege dovecot: IMAP(userA): Raw backtrace: imap [0x46372e] -> imap [0x46349c] -> imap(t_strndup+0) [0x470cf0] -> imap(cmd_create+0xd1) [0x4142c1] -> imap [0x4178f7] -> imap [0x417989] -> imap(_client_input+0x6d) [0x417fbd] -> imap(io_loop_handler_run+0x101) [0x468e61] -> imap(io_loop_run+0x18) [0x467f28] -> imap(main+0x3f2) [0x41f6c2] -> /lib/libc.so.6(__libc_start_main+0xf4) [0x2b974f225b44] -> imap [0x4132e9] Jan 7 18:27:01 siege dovecot: child 27443 (imap) killed with signal 6 Jan 7 18:35:36 siege dovecot: IMAP(userB): file strfuncs.c: line 165 (p_strndup): assertion failed: (max_chars != (size_t)-1) Jan 7 18:35:36 siege dovecot: IMAP(userB): Raw backtrace: imap [0x46372e] -> imap [0x46349c] -> imap(t_strndup+0) [0x470cf0] -> imap(cmd_create+0xd1) [0x4142c1] -> imap [0x4178f7] -> imap [0x417989] -> imap(_client_input+0x6d) [0x417fbd] -> imap(io_loop_handler_run+0x101) [0x468e61] -> imap(io_loop_run+0x18) [0x467f28] -> imap(main+0x3f2) [0x41f6c2] -> /lib/libc.so.6(__libc_start_main+0xf4) [0x2ad667dfeb44] -> imap [0x4132e9] Jan 7 18:35:36 siege dovecot: child 27902 (imap) killed with signal 6 user authentifaction is done against local unix users. # 1.0.5: /etc/dovecot/dovecot.conf log_timestamp: %Y-%m-%d %H:%M:%S ssl_cert_file: /etc/ssl/certs/mail.pem ssl_key_file: /etc/ssl/private/mail.key login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-login mail_extra_groups: mail mail_location: maildir:~/Maildir imap_client_workarounds: outlook-idle netscape-eoh tb-extra-mailbox-sep namespace: type: private prefix: INBOX. inbox: yes auth default: passdb: driver: pam userdb: driver: passwd socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix with kind regards, guenther sommer.

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[Dovecot] What would you tell the CIO in an "ABCs of Email" overview?
by Esther Schindler 07 Jan '08

07 Jan '08

One of the key points that came up when I researched and wrote the "Five Things CIOs Should Know about Fighting Spam" article (http:// www.cio.com/article/28830) was that they should know the basics of how email works. Otherwise, said plenty of techies, the CIO won't have the first idea of what the email admin is complaining about. So I'm going to do my part. I'm going to write an "ABCs of Email" article (to accompany the many other ABCs articles we have on CIO.com, at http://www.cio.com/article/40242 ). I'd like your input on the topics that should be included, keeping in mind the fact that the target reader is a CIO, IT manager, or someone who wants to understand the basics, *not* actively get involved in email management. You don't need to write an essay for me or inundate me with links (though hey, if you want to make my life easier I shall not complain). What I'm looking for, primarily, are the categories of information that I should cover. In other words, if your CIO had an email ephiphany and asked you to give a half-hour presentation, what would you include? This won't be an "Expert says..." article nor will it be "Geek on the street says...." I intend to compile and research the "least you need to know" for the not-necessarily-techie bosses out there. And hopefully the end result will be that you have one less dumb question to deal with in your life. So: any suggestions? (You can reply privately if you prefer.) Esther Schindler senior online editor, CIO.com her blog: http://advice.cio.com/taxonomy/term/34

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Re: [Dovecot] v1.1.beta13 released
by Bruce Bodger 06 Jan '08

06 Jan '08

On Jan 6, 2008, at 9:51 AM, Timo Sirainen wrote: >>>> What plugins do you use? >> >> mail_log and cmusieve (dovecot-sieve-1.1.3) > > Well, I can't reproduce this with my setup, so there must be something > special that's causing this. Unless it's your client that creates the > mailbox itself? Perhaps you're right. I just tried using Thunderbird (Mac) and it does not exhibit this behavior. Apple Mail has an option, "Automatically synchronize changed mailboxes" which I do NOT have checked so the problem must be within Apple Mail as you surmised. In fact, Apple Mail is now displaying public/INBOX in it's list of mailboxes even though it hasn't been created under ~/Maildir/control/ public G518X2:~/Maildir/control/public root# ls -la total 8 drwx------ 5 bb admin 170 Jan 6 10:20 . drwx------ 3 bb admin 102 Jul 28 22:38 .. drwx------ 4 bb admin 136 Jan 6 09:54 .HAM drwx------ 4 bb admin 136 Jan 6 10:10 .SPAM -rw------- 1 bb admin 9 Sep 9 07:06 subscriptions ...and INBOX in not listed in 'subscriptions'. Sorry for the goose chase, unless you like goose, of course :-) B. Bodger

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