July 2011 - dovecot - dovecot.org

Re: [Dovecot] Converting from qpopper mbox to dovecot maildir
by Joseph Tam 26 Jul '11

26 Jul '11

Dimos Alevizos <dalevizo(a)otenet.gr> wrote: > We recently completed the migration in our company from qpopper/mbox to > dovecot/mbox using only pop3_reuse_xuidl = yes and while everything went much > easier than we feared we came across an interesting problem that you might want > to pay attention to. > > We use dovecot to provide both pop3 and imap (directly and via webmail) access > to our client's mailboxes and we noticed that when a client moves a mail to a > different folder and then back into INBOX (say he deleted it by mistake and > moves it back), dovecot inserts the same X-UIDL into it's cache, thus creating > duplicate entries. > > When a pop3 client sees this (at least outlook in our case) it think's that > there's something wrong with the server's X-UIDL handling and re-downloads the > duplicate messages. EVERY time the user checks his mails. I haven't heard any user complaint about this, but perhaps nobody tried this before. I recreated this situation (copy old qpopper message INBOX -> tmpbox -> INBOX) and produced two messages with identical X-UIDL headers, but according to the Wikipedia entry for POP3: Comparison with IMAP Clients that leave mail on servers generally use the UIDL command to get the current association of message-numbers to message identified by its unique identifier. The unique identifier is arbitrary, and might be repeated if the mailbox contains identical messages. This is echoed in RFC1939 (page 11-12) While it is generally preferable for server implementations to store arbitrarily assigned unique-ids in the maildrop, this specification is intended to permit unique-ids to be calculated as a hash of the message. Clients should be able to handle a situation where two identical copies of a message in a maildrop have the same unique-id. So POP3 UIDLs are not guaranteed to be unique, especially if the messages are the same. Perhaps some mail readers are making unwarranted assumptions about the uniqueness of UIDLs: http://www.eggheadcafe.com/software/aspnet/33485042/duplicate-messageiduidl… https://www.ritlabs.com/bt/view.php?id=3599 Joseph Tam <jtam.home(a)gmail.com>

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[Dovecot] phantom new message notification
by Stan Hoeppner 26 Jul '11

26 Jul '11

I've developed a phantom new message notification on a single IMAP folder in Thunderbird. I've deleted the Dovecot index files for this problematic folder, and I've deleted the .msf file in the Tbird profile. Neither of which solved the problem. The only other time I've run into something similar was with CONDSTORE quite a long time ago, but that affected all folders, not just one. Any ideas? -- Stan

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[Dovecot] drac plugin "net_ip2addr() failed: Operation not permitted"
by Michael Moritz 25 Jul '11

25 Jul '11

Hi, I'm trying to get the drac plugin working (again) but I'm stuck with the following message: Restarting IMAP/POP3 mail server: dovecotEDRAC: net_ip2addr() failed: Operation not permitted This is on a Debian Squeeze box, dovecot version 1.2.15-7, drac version 1.12 Looking at the source it should print the IP in the brackets of net_ip2addr. The fact that it's just empty made me think that I may need to set an environment variable. I tried IP="127.0.0.1" in /etc/default/dovecot and as export but to no avail. Any ideas? Thanks, mimo

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[Dovecot] passwd not found
by Erik - versatel 25 Jul '11

25 Jul '11

If I use in dovecot.conf passdb passwd-file { args = /etc/dovecot/vhosts/%d/etc/shadow } userdb static { args = uid=virtual gid=virtual home=/var/mail/vhosts/%d/%u allow_all_users=yes } I get an authorisation failure in my mail.log file. If I use passdb passwd-file { args = /etc/dovecot/vhosts/shadow } userdb static { args = uid=virtual gid=virtual home=/var/mail/vhosts/%d/%u allow_all_users=yes } This works !!! (without the %d) in the passdb passwd-file Than the %d/%u is correctly rewritten in the userdb static. PS I have in the passwd-file the username@domain and the username documented for testing. I think there is some problem with the %d (DOMAIN) How can I check if %d is filled ?? And how can i make different authorisationdirs and files per domain. Thanks Erik My config # 1.2.15: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-686 i686 Debian 6.0.2 ext4 log_timestamp: %Y-%m-%d %H:%M:%S protocols: imap imaps pop3 pop3s ssl_cert_file: /etc/ssl/certs/server.crt ssl_key_file: /etc/ssl/private/server.key login_dir: /var/run/dovecot/login login_executable(default): /usr/lib/dovecot/imap-login login_executable(imap): /usr/lib/dovecot/imap-login login_executable(pop3): /usr/lib/dovecot/pop3-login mail_privileged_group: mail mail_location: maildir:/var/mail/vhosts/%d/%n/Maildir mail_debug: yes mbox_write_locks: fcntl dotlock mail_executable(default): /usr/lib/dovecot/imap mail_executable(imap): /usr/lib/dovecot/imap mail_executable(pop3): /usr/lib/dovecot/pop3 mail_plugin_dir(default): /usr/lib/dovecot/modules/imap mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3 auth default: mechanisms: plain login passdb: driver: passwd-file args: /etc/dovecot/vhosts/shadow userdb: driver: static args: uid=virtual gid=virtual home=/var/mail/vhosts/%d/%u allow_all_users=yes socket: type: listen client: path: /var/spool/postfix/private/auth-client mode: 432 user: postfix group: postfix

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[Dovecot] dspam
by Stéphane Guedon 25 Jul '11

25 Jul '11

I have installed dspam (from gentoo compile system) and dovecot-antispam plugin for dovecot 2.0.13. I have setup it in dovecot.conf but still have this: jul 24 20:38:19 einstein dovecot: imap(stephane): Error: antispam plugin backend is not selected for this user any explanation ? thanks for your help. -- Stéphane Guedon page web : http://www.22decembre.eu/ carte de visite : http://www.22decembre.eu/downloads/Stephane-Guedon.vcf clé publique gpg : http://www.22decembre.eu/downloads/Stephane-Guedon.asc

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[Dovecot] dovecot-antispam + spamassassin
by Yann Leboulanger 24 Jul '11

24 Jul '11

Hi, I recently saw this a branch [1] of your git repository when dovecot-antispam has support of spamassassin. Is it intentional to not add it to the official release? Are there any plan to officially support spamassassin? [1] http://www.freenux.org/cgi-bin/gitweb.cgi?p=dovecot-antispam.git;a=shortlog… Thanks -- Yann

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[Dovecot] UIDVALIDITY Change
by Dominik Schulz 24 Jul '11

24 Jul '11

Hi, I'm attempting to migrate a Courier-IMAP Server to Dovecto. I've followed the instructions in the Dovecot wiki and converted the indices using the provided perl script. Howevery I'm getting "UIDVALIDITY changed ..." messages in the logfile and some of the test clients list some messages twice. I didn't find much about this issue in the wiki. Any hints? -- Mit freundlichen Grüßen / Best Regards Dominik

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[Dovecot] Ubuntu package for dovecot 2.0.x from debian package
by Vincent Richomme 23 Jul '11

23 Jul '11

Hi, I am running a server under Ubuntu 11.04(natty) and I would like to install a 2.x version but unfortunately the only package available is 1.2.15. Of course I could compile and install from sources but I would prefer to handle packages because it's a lot simpler and cleaner. After some research I found some debian packages available here : http://xi.rename-it.nl/debian/pool/testing-auto/dovecot-2.0/ So my question is would it be possible to recompile the source package to make a ubuntu one ? Or maybe could I install directly the debian package (but I suppose dependencies are not the same ...). If someone has already an experience with that and couls share his experience. Still don't understand why distros don't use dovecot 2.x ? Is it considered still as unstable ? Thanks

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Re: [Dovecot] Converting from qpopper mbox to dovecot maildir
by Joseph Tam 23 Jul '11

23 Jul '11

On Tue, 5 Jul 2011, list(a)airstreamcomm.net wrote: > We have an older mail server using qpopper and the mbox format which we > need to update to dovecot and maildir format. I have read through the docs > on migrating from mbox to maildir, as well as a few nuggets on how to > migrate from qpopper to dovecot, and I was wondering if I could get some > suggestions on best practices for this specific migration. Would the built > in dovecot conversion plugin be a viable method to migrate users? We will > be migrating to dovecot 2.0.12 from qpopper 4.0.5. I didn't do anything special other than to use pop3_reuse_xuidl = yes so that clients don't re-download all their messages. Joseph Tam <jtam.home(a)gmail.com>

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[Dovecot] Automatic Client Retrieval of Messages
by qmail＠top-consulting.net 23 Jul '11

23 Jul '11

Are there any mail clients that automatically pull in folder contents even though they don't have a subscription to that folder ? I have defined a namespace with subscriptions=yes, hidden=yes and list=yes. There are no subscriptions files for any of the users yet they are still pulling data from the folders in that namespace. What gives ?

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