August 2013 - dovecot

[Dovecot] Can't take user info from an alternate file
by dave＠661.org 12 Aug '13

12 Aug '13

I'm positive I did everything right to get Dovecot to take usernames and passwords from /etc/dovecot/users, but it still goes for /etc/passwd and /etc/shadow. The format of /etc/dovecot/users is "alice:{PLAIN}plaintextpassword" Here's my "doveconf -n": # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-51-virtual x86_64 Ubuntu 12.04.2 LTS auth_debug = yes auth_verbose = yes auth_verbose_passwords = plain hostname = papasmurf.foobar.com listen = * mbox_write_locks = fcntl passdb { args = scheme=PLAIN-MD5 username_format=%n /etc/dovecot/users driver = passwd-file } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0664 user = postfix } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { args = username_format=%n /etc/dovecot/users driver = passwd-file } I'm using Ubuntu Precise and version 2.0.19 of Dovecot. -- David Griffith dave(a)661.org

2 5

[Dovecot] Disconnected (no auth attempts)
by Eric Broch 12 Aug '13

12 Aug '13

Hello list, I have a user who is not able to 'get' email using the 'Get Mail' option in his Thunderbird Client. The error on the server is the following: [Dovecot] dovecot: imap-login: Disconnected (no auth attempts) : rip 192.168.7.7, lip 192.168.7.12, TLS This user is able to receive mail on his phone, however. What does this error mean? Eric <http://www.dovecot.org/list/dovecot/2012-January/062988.html>

2 1

Re: [Dovecot] Please HELP: how to delete all messages older than X days
by Răzvan Sandu 12 Aug '13

12 Aug '13

Pe 7 Aug 2013 11:35, Timo Sirainen a scris: >> Thank you, but doveadm expunge will ask for the mailbox name: >> >> [root@mail1 ~]# doveadm expunge -u john.doe(a)example.com ON >> 2013-08-07 doveadm(root): Fatal: expunge: To avoid accidents, >> search query must contain MAILBOX in all search branches > > Add: mailbox '*' Thank you, it works! May I use the same wildcard syntax ('*') when configuring the expire plugin? Something like: mail_plugins = $mail_plugins expire plugin { expire = * } or plugin { expire = '*' } ? Best regards, Răzvan

3 2

[Dovecot] Unlock non existent locks
by Thomas Hummel 12 Aug '13

12 Aug '13

Hello Timo, I'm running a single instance of dovecot-2.1.15 on a single host running 8.3-RELEASE-p3 FreeBSD amd64 mailboxes (Maildir), control files and indexes are on NFS (v3,tcp) mail_nfs_storage = yes lock_method = fcntl [didn't touch the following] # Mail index files also exist in NFS. Setting this to yes requires # mmap_disable=yes and fsync_disable=no. mail_nfs_index = yes served by an Isilon s200 node (OneFS 6.5.5.22) procmail delivers in the same location through postfix-2.8.7 The filer shows *a lot* of such messages : 2013-08-02T14:12:29+02:00 <0.5> XXXX-10(id10) /boot/kernel.amd64/kernel: [lkf_delegate.c:2752](pid 46390="kt: dwt3")(tid=101282) dev_local_lkf_unlock(): no lock entry present to unlock for resource: 1:19d5:fdbe ;client: 0xa51cc3f444107 Corresponding file may be a message, a maildir, an index, ... I can experience the same message with a simple fcntl C program which tries to unlock an NFS file without prior locking of it. However, the problem occurs only on a FreeBSD client (I tried the old nfs client and the new (mount_newnfs), not on a 2.6.32-358.11.1.el6.x86_64 CentOS release 6.4 (Final) Linux release. So my guess is that dovecot has some safety mechanism which tries to unlock locked files, maybe after some timeout and that, in the case of a an already unlocked file, the FreeBSD client sends the unlock RPC request to the server anyway whereas the linux client does not, noticing there isn't anything to unlock. Can you help me explaining such a behavior ? Are those "unlock a file with no prior lock" made on purpose or is it a bug ? Would it be an application or a RPC bug ? Can you think of another reason ? Thanks -- Thomas Hummel | Institut Pasteur <hummel(a)pasteur.fr> | Groupe Exploitation et Infrastructure

2 5

[Dovecot] Error: Threading lost Message ID?
by Ralf Hildebrandt 12 Aug '13

12 Aug '13

QUERY: THREAD REFERENCES ISO-8859-1 ALL RESPONSE: [SERVERBUG] Internal error occurred. Refer to server log for more information. [2013-08-09 15:42:34] Aug 9 15:41:48 postamt dovecot: imap(username) tTbs7oPjfACNKs4m: Error: Threading lost Message ID Aug 9 15:42:34 postamt dovecot: imap(username) tTbs7oPjfACNKs4m: Error: Threading lost Message ID What does that mean? WHY has the Message-Id been lost? How can I find out WHICH MAIL caused this? This is the most recent dovecot 2.2.x -- 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 6

[Dovecot] GUID Mismatch Issue
by Jeff Geiger 12 Aug '13

12 Aug '13

Dovecot 2.1.7 While migrating mail from one server (Maildir) to another (mdbox), a config issue caused my dsync to fail on a few accounts. Those accounts received mail on the new server over night and it autocreated new inboxes with new GUIDs. Now dsync wants nothing to do with mirroring between the two (diff GUIDs). Is there a way to fix this? dsync(jeff(a)foo.bar): Error: Mailbox INBOX changed its GUID (0eee4b021dcadd5158550000eed085a1 -> 43f87412a8f00352ac340000be821591) dsync(jeff(a)foo.bar): Error: msg iteration failed: Couldn't open mailbox 0eee4b021dcadd5158550000eed085a1 dsync(jeff(a)foo.bar): Error: Mailbox INBOX changed its GUID (0eee4b021dcadd5158550000eed085a1 -> 43f87412a8f00352ac340000be821591) dsync(jeff(a)foo.bar): Error: Mailbox Trash changed its GUID (0fee4b021dcadd5158550000eed085a1 -> 6300df050ef10352e9350000be821591) dsync(jeff(a)foo.bar): Error: Mailbox Sent changed its GUID (832d1e3663cadd515f5d0000eed085a1 -> 855ef505c0f00352fc340000be821591) I need a way to merge the mailboxes, in either direction, so I can clear out one side and successfully migrate the mail accounts. Any tips or pointers are greatly appreciated.

2 1

[Dovecot] multiple passdbs and auth sockets
by md＠Linux.IT 12 Aug '13

12 Aug '13

I have a few systems which run dovecot 1.x as the authentication backend for Postfix, with multiple auth { } sections like this one, each one with a different passdb and its own socket: auth ldap-10 { passdb ldap { args = /etc/dovecot/dovecot-ldap-10.conf } socket listen { client { path = /var/spool/postfix/private/auth-10 mode = 0666 } } } I need multiple sockets tied to multiple dbs because there are duplicated accounts, but after switching to dovecot 2.1.7 apparently *all* passdbs are checked and dovecot reports this message: Warning: Obsolete setting in /etc/dovecot/conf.d/auth-local.conf.ext:91: add auth_ prefix to all settings inside auth {} and remove the auth {} section completely doveconf shows that all my custom sockets are now part of a single "service auth { }" section, while all the passdbs appear at the top level. How can I update my configuration for dovecot 2.x? -- ciao, Marco

2 1

[Dovecot] Errors in SASL authentication ("attempted master login")
by Grzegorz Staniak 12 Aug '13

12 Aug '13

Hi, I'm using dovecot 2.2.4 (with Postfix 2.8.4) as both the SASL authentication backend and the delivery agent, and I keep getting lines like the following in the dovecot.log from the authentication subsystem: auth: passdb(toshiba1(a)domain,8.8.8.8,master): Attempted master login with no master passdbs (trying to log in as user: plain) The connections come from an old (embedded) mail client in a printer-fax machine. I googled for this specific error, but I only found info about old clients using "user\0user\0pass" string incorrectly during authentication, which caused a problem for earlier, development versions of dovecot. Actually, I recently migrated from 1.2 to 2.2.4 exactly to alleviate this situation, but the errors persist. Is there a way to remove the problem or work around it? Regards, GS -- Grzegorz Staniak <gstaniak [at] gmail _dot_ com>

2 1

[Dovecot] The docs a re a bit weird on "Directory hashing"
by Eliezer Croitoru 11 Aug '13

11 Aug '13

In squid we use a double layer of hashed directories on the FS to allow storage of millions of files. I was reading the "Directory hashing" section but never understood it.. since it's written.. in a way I could not understand. I am using this line: mail_location = maildir:/home/vmail/%d/%n/Maildir/ and I want to migrate to a hash based directory scheme. While trying to understand how that hash will work I stumbled a old thread at: http://www.dovecot.org/list/dovecot/2010-June/049695.html there they used: mail_location=maildir:/buzones/us.es/%1Hu/%2.1u/%n so I assume it should be used like that: mail_location=maildir:/home/vmail/%H/%2.256Hn/%d_%n/Maildir/ or: mail_location=maildir:/home/vmail/%1Mu/%2.1Mu/%d_%n/Maildir/ It's a bit hard to think alone so I hope you can assist me. let say I want to follow the model of squid cache_dir which has: cache_dir aufs /usr/local/squid/var/cache/squid 40000 16 256 And means a two layers cache of max 16 directories on the first layer and 256 directories on the second layer. The above allows millions of files storage and can benefit from all ext4 lower kernel levels of compatibly rather then do stuff on the user-land.. Since I am not 100% sure that the scheme I understood is indeed what I think I assume the above will need a small correction. Eliezer

3 4

[Dovecot] prevent dovecot from modifying maildirs
by Felix Rubio Dalmau 11 Aug '13

11 Aug '13

Hi all, Is there any possibility to ask dovecot to write nothing to disk, something like a "read only" state, without shutting it down? I have set up a ZFS+postfix+dovecot mail server, and I need both postfix (postsuper -h ALL) and dovecot (¿?) to stop modifying the disk to create the snapshot to be saved. Does anybody has any idea on how to achieve this? Regards! Felix

5 10