- dovecot - dovecot.org

[Dovecot] Mailbox problem
by Sadiq Walji 13 May '08

13 May '08

Greetings, I am using dovecot as our POP3 and IMAP server and Squirrelmail for the Webmail. Some of our users get the error message below when trying to access the mailbox using Webmail: "ERROR: Could not complete request. Query: SELECT "INBOX" Reason Given: Internal error occurred. Error report written to server log. [2008-05-12 09:08:39] To resolve this issue, I need to open the /var/spool/mail/<username> (mailbox of the user) and delete an empty line that is inserted at the top of the mailbox file. I am running dovecot-0.99.11-8.EL4 on CentOS release 4.6 (Final). Kindly provide suggestions on how to resolve this issue. Thank you, Sadiq

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[Dovecot] how add size (, S=size) and virtual size (, W=vsize) fields to a maildir filename ?
by Marco Giunta 13 May '08

13 May '08

Hi to all, I'm a sys admin in a college, and we're using Dovecot as IMAP/POP3 server and delivery; we're also patch dovecot to add managesieve capability. I've a question: I've read on dovecot's wiki, that is possible improve the performance on maildir files by adding ,S=<size>,W=<vsize> fields on filename. How is possible to do that ? I've search on all the wiki and on the mailing list, but I didn't find nothing about modify the maildir file name. Someone can help me ? Best regards, Marco

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[Dovecot] Access to the root of a shared mailbox
by RIOTTEAU Gwénaël 13 May '08

13 May '08

I have an issue with shares mailboxes Example : I have 2 users A and B. A must have an access to all mail of B So i create a public namespace namespace public { separator = / prefix = Public/ location = maildir:/home/users/B/Maildir } It's OK for the subfolders, but not for the root (B's inbox, the most important !) it's seems to be like http://www.dovecot.org/list/dovecot/2007-October/025965.html it's the only feature that prevents me to migrate from Courier-IMAP !

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[Dovecot] Dovecot - MySQL Virtual User Virtual Domains
by Evaggelos Balaskas 12 May '08

12 May '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 i wrote a mini quick and dirty how to install dovecot from mercurial with mysql support to use virtual users and virtual domains. The tutorial doesnt cover much, but still someone could find some help at this. http://ebalaskas.gr/wk/dovecot/dovecotsqlauth any comments (good or bad) can addressed to my email address Evaggelos Balaskas - http://ebalaskas.gr/wk Unix System Engineer Informatics Engineer Technological Education -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIKKTqWIK+Pe9twhoRAgPiAJ0drcy9TYkCYyNY+5cHh+H/If1RJQCgt4bX JZs12hgvVyBrkQq3PTtFAy8= =Tafd -----END PGP SIGNATURE-----

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[Dovecot] imapsync
by Lars Stavholm 12 May '08

12 May '08

Hi All, I'm trying out the imapsync migration tool, migrating user mails from cyrus IMAP to Dovecot IMAP. In order to avoid knowing about each of the users password, I use the cyrus admin user in the cyrus end. Is there such a thing as the dovecot admin user, or is that simply the root user? Any input appreciated /Lars

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[Dovecot] imap memory footprint rather large
by martin f krafft 12 May '08

12 May '08

Dear list, I am experimenting with a new mail handling setup and it involves a single IMAP folder with just under 70'000 messages. When OfflineIMAP connects to the server, the imap process starts to eat up a lot of memory: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 15607 madduck 35 19 283m 244m 239m D 16.9 49.3 0:09.96 imap On the contrary, when "online" client, such as Thunderbird connect, memory usage is around 10m, which is entirely acceptable. The way offlineimap reads may is by FETCHing metadata, then APPENDing new local mail, SEARCHing for the UIDs of each uploaded mail, and finally FETCHing new remote mail. Memory use seems to be O(n) in the size of the folder. On the folder with 70k messages, dovecot seems to allocate 280m of memory, which it then fills to about 70% during the metadata FETCH, and then keeps growing while APPEND/SEARCHing the new local messages. The 70k mailbox is just short of 600Mb in size on disk. Dovecot uses 280Mb to serve it. Is it possible that dovecot is reading too much into memory, or over-optimising? Can I somehow tweak this to lower the memory footprint? Cheers, -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck "the unexamined life is not worth living" -- platon spamtraps: madduck.bogus(a)madduck.net

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[Dovecot] Another numptie question - making maildirs for shared mailboxes.
by Stroller 12 May '08

12 May '08

Hi there, Sorry to have so much trouble with my Dovecot setup & to ask so many questions, but I'm having some problems with shared folders. I've read the thread at <http://dovecot.org/pipermail/dovecot/2005-January/006079.html> and added the following lines to /etc/dovecot.conf: namespace private { separator = / prefix = inbox = yes } namespace public { separator = / prefix = General/ location = maildir:/tmp/dovecot-test/ inbox = no hidden = no } So I create a directory /tmp/dovecot-test/ and an empty file /tmp/dovecot-test/dovecot-shared with liberal (777 & 666 respectively) permissions and then try to subscribe to the "General" folder in Outlook - I get a "failed to subscribe to the folder. The server responded `the mailbox doesn't exist: General`" error message, but cur, new & tmp are created in /tmp/dovecot-test. These subfolders are owned by the user that attempted to subscribe & have 700 permissions; chmod'ing them 777 makes no difference. Since "default_mail_env = maildir:%h/.maildir" in dovecot.conf I make a directory /tmp/dovecot-test/.maildir also containing cur, new, tmp & dovecot-shared. When I select "IMAP folders" in Outlook I am still unable to subscribe to "General" but am now able to subscribe to "General/maildir". The subscribed folder is shown in Outlook underneath the users' Inbox as a sub-folder of general, screenshot at <http://linux.stroller.uk.eu.org/DovecotSharedFolders.png> - see how I can't subscribe to "General" alone, but it is "brought in" by subscribing to "General/maildir"? If I try to copy a test message into General then, after a delay of a minute or so, I get "Can't move the items - this IMAP command could not be sent to the server before the connect was terminated"; if I try to copy the test message into General/maildir then I immediately get "Can't copy the items. The server responded: `Internal error occurred. Refer to server log for more information [2005-12-20 12:05:40]". I've tried tinkering with other directory structures under /tmp/dovecot-test/ with no success - can anyone suggest what I'm doing wrong, please? It's quite important to me that the "General" folder is a fairly high-level one - only one additional folder icon should show up for the users' shared mail. At one point I managed to create a folder General/General, but that's undesirable - the users wouldn't understand the concept of having a folder showing in Outlook that they can't write to, or which is only used as a container for another folder. (In any case, I believe I was still unable to write to it). I was about to say, "I know I could resolve this with the use of a symlink-type shared folder, but that's undesirable because I'd have to manually add the symlink for each user that's added to the system", but writing this it occurs to me that I could resolve that by adding the symlink to the the etc/skel/. Nevertheless, I see the namespaces approach as more elegant, as it allows for different user groups having different shared folders. I'd appreciate any advice - I suspect I'm just getting the directory hierarchies wrong, or the syntax of dovecot.conf wrong AGAIN! If anyone with a working shared folders setup could provide a copy of the appropriate section of dovecot.conf & a listing of the appropriate directories then I'd be EXTREMELY grateful. Stroller.

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[Dovecot] how add size and vsize filed to a maildir filename ?
by Marco Giunta 12 May '08

12 May '08

Hi to all, I'm a sys admin in a college, and we're using Dovecot as IMAP/POP3 server and delivery; we're also patch dovecot to add managesieve capability. I've a question: I've read on dovecot's wiki, that is possible improve the performance on maildir file by adding ,S=<size>,W=<vsize> fields on filename. How is possible to do that ? I've search on all the wiki and on the mailing list, but I didn't find nothing about modify the maildir file name. Someone can help me ? Best regards, Marco

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[Dovecot] IMAP, Shared folders, symlinks and permissions
by Nigel Allen 12 May '08

12 May '08

Greetings Using FC7, dovecot-1.0.3-6.fc6 and maildir I have a recurring problem with permissions. We have a (real) account on the system called "custs". Within the email account for custs there exists some 300 folders, one for each customer. This worked okay originally with mbox. Everyone had access to their own email folders and they all had access to the "custs" account. They only problem is that to find one folder (customers)'s emails, you had to scroll through 300+ folders. For the people who need access to all of the custs' folders, there was no problem (apart from a real estate one of scrolling which sometimes caused people to drag and drop into the wrong folders). The problem is that around 16 staff need only access to a subset of customers (i.e. the ones they manage - around 20 each) while the rest of the staff need access to the lot. What we did was to convert everything to Maildir so that we could use symlinks. So far so good. We created symlinks from /home/custs/Maildir/customer1 to /home/manager1/Maildir/customer1 and from /home/custs/Maildir/customer2 to /home/manager2/Maildir/customer2. Again, so far, so good. Manager 1 gets access to Customer 1 and Manager 2 gets access to Customer 2. The problem comes when someone who ONLY has access to the "custs" account drops an email into Customer 1. The file dovecot-uidlist gets created and suddenly Manager 1 cannot see the folder. We changed (in desperation) the group owner of custs/Maildir to "common" (which everyone is a member of) and did a chmod g+s from the custs/Maildir down. e even set the permissions of the custs/Maildir/* to 777 to watch what was happening. It appears that the permissions on the file dovecot-uidlist is set to 600 every time someone drops an email into the folder. Then when someone else tries to access the folder they get a "permission denied" error on dovecot-uidlist. Can anyone explain to me how to: Change the way dovecot creates the dovecot-uid files so that the permissions are set to 660 or 666 or Set this up better so that we can share all these folders. Any suggestions, questions, comments will be (very) gratefully accepted. Rgds Nigel. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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[Dovecot] BUG: Bad grep when building dovecot?
by Andrew Lentvorski 12 May '08

12 May '08

Is dovecot *really* that picky about grep, or did it just happen to pick up an autoconf that's being overly pedantic? I saw this message a couple of times when googling, but no particularly good solution presents itself. I'll probably give it a new GNU grep just to get it to shut up, but I'm a bit surprised. I tried to compile dovecot in an OpenSolaris 2008.5 system in a zone (which is quite a bit more minimal than base OpenSolaris). bash-3.2# uname -a SunOS postfix-s0 5.11 snv_86 i86pc i386 i86pc bash-3.2# ./configure --help `configure' configures dovecot 1.0.12 to adapt to many kinds of systems. bash-3.2# which grep /usr/bin/grep bash-3.2# grep -v Usage: grep -hblcnsviw pattern file . . . bash-3.2# which egrep /usr/bin/egrep Error in configure: checking for cc option to accept ISO C89... (cached) none needed checking dependency style of cc... (cached) none checking how to run the C preprocessor... cc -E checking for grep that handles long lines and -e... configure: error: no acceptable grep could be found in /opt/SunStudioExpress/bin:/usr/sbin:/usr/bin:/usr/xpg4/bin Thanks, -a

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