- dovecot - dovecot.org

[Dovecot] Mail.app IDLE support
by Martin R. Ehmsen 16 Nov '07

16 Nov '07

Hi, I'm trying to use the new IDLE support in Mail.app on Mac OS 10.5, and it works sort of, but it seems to miss some notifications. My guess is the IDLE support in Mail.app is implemented such that it sets up a connection for IDLE notifications and then checks the mail via another connection, and because of that the "IDLE-connection" gets disconnected for inactivity after 30 min. The reason for my guess is that I get the following in my logs: dovecot: Nov 14 17:00:29 Info: imap-login: Login: user=<amanda>, method=PLAIN, rip=::ffff:xxx.xxx.xxx.xxx, lip=::ffff:192.168.1.2, TLS dovecot: Nov 14 17:00:29 Info: imap-login: Login: user=<ehmsen>, method=PLAIN, rip=::ffff:xxx.xxx.xxx.xxx, lip=::ffff:192.168.1.2, TLS dovecot: Nov 14 17:00:30 Info: imap-login: Login: user=<amanda>, method=PLAIN, rip=::ffff:xxx.xxx.xxx.xxx, lip=::ffff:192.168.1.2, TLS dovecot: Nov 14 17:00:50 Info: imap-login: Login: user=<ehmsen>, method=PLAIN, rip=::ffff:xxx.xxx.xxx.xxx, lip=::ffff:192.168.1.2, TLS dovecot: Nov 14 17:00:51 Info: imap-login: Login: user=<ehmsen>, method=PLAIN, rip=::ffff:xxx.xxx.xxx.xxx, lip=::ffff:192.168.1.2, TLS dovecot: Nov 14 17:04:58 Info: imap-login: Login: user=<ehmsen>, method=PLAIN, rip=::ffff:xxx.xxx.xxx.xxx, lip=::ffff:192.168.1.2, TLS dovecot: Nov 14 17:30:40 Info: IMAP(amanda): Disconnected for inactivity dovecot: Nov 14 17:43:29 Info: IMAP(amanda): Disconnected for inactivity Is there something I can do about this problem? Is the IDLE implementation in the 1.1 branch different from the implementation in the 1.0 branch of dovecot? Or can I debug this issue further? I guess these things are standardized, but it seems hard for Apple to follow a standard :-) Thanks in advance, Martin R. Ehmsen

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Re: [Dovecot] umask not applied
by Nikolay Shopik 15 Nov '07

15 Nov '07

- original message - Subject: Re: [Dovecot] umask not applied From: Thomas <lists(a)abelonline.de> Date: 15/11/2007 00:46 Quoting Troy Engel <tengel(a)fluid.com>: > I'll be the first to mention that 1.0rc15 is ancient by dovecot > standards, upgrade to 1.0x first and see if it's still broken. I am running a debian etch server. Unfortunately 1.0rc15 is the lastest version available in the stable tree. I would really like to remain in stable if somehow possible since I think combining stable and unstable will lead to chaos. I'll check the changes in later version and if they mention something about umask. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. If you are stick with debian stable just use backports so you don't mess up anything and still will be running stable and almost latest packages.

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[Dovecot] Is there any way to query a secure imap server for certificate details
by Stewart Dean 15 Nov '07

15 Nov '07

? -- ==== Stewart Dean, Unix System Admin, Henderson Computer Resources Center of Bard College, Annandale-on-Hudson, New York 12504 sdean(a)bard.edu voice: 845-758-7475, fax: 845-758-7035

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[Dovecot] SSL/TLS with Outlook client
by Jonathan Bond-Caron 15 Nov '07

15 Nov '07

Anyone have any solution to this? I also getting a "The target principal name is incorrect." in Outlook 2007 Is this a problem with dovecot?

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[Dovecot] dovecot.index mtime
by Matt 15 Nov '07

15 Nov '07

Is there anyway I can get Dovecot to update mtime on dovecot.index everytime a user successfully checks there email? Or perhaps there is a better way to do what I want here. I am working on a script that I want to check when the last time a user checked there email account. If a user has not checked it in say 6 months I want to automatically suspend the account through the MTA. If they start checking it again I also want to automatically reinstate it. What I thought was a good way was to look at the mtime on dovecot.index but a user can be checking there email daily but if they do not receive a new message in say 6 months the mtime will date back to 6 months still. Ran into this with an email address used by a fax machine. So is there a better way with dovecot to determine this? I am using dovecot-1.0.rc29 right now. Matt

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[Dovecot] New full text search indexer
by Timo Sirainen 14 Nov '07

14 Nov '07

As described earlier (http://dovecot.org/list/dovecot/2006-December/018055.html) Dovecot nowadays has full text search indexing support in CVS HEAD. Currently there are two backends: Lucene and Squat. Lucene's problem is that standard IMAP SEARCH command can't be used with it without breaking IMAP RFC. So Lucene can be used only with non-standard X-BODY-FAST and X-TEXT-FAST search commands. Squat's code then is quite complex and it's pretty slow. It works with 4 character blocks, so it can answer: - Search string < 4 characters: Can't answer anything - Search string = 4 characters: Definite yes/no - Search string > 4 characters: Probable yes / definite no Since search strings are usually more than 4 characters, Dovecot uses the index only to filter out messages which definitely won't match and then does regular searching for the non-filtered messages. It works ok, but it could work better. The Squat indexes take maybe 30-50% of the mailbox's size. Most of the space goes to UID lists (list of messages matching each 4 character block). For example one UID list could be "2,4-10,20-30". This is already stored in a compressed format by storing the UID numbers relative to previous UID, which allows storing them usually with a single byte per UID, even if the UIDs are large. So, this morning I had an idea how this could maybe be improved with two changes: 1. Don't use 4 character blocks. Instead allow variable sized paths, and keep track of the UIDs for each node in the path. So for example adding "abc" to UID 1 will place the UID 1 to node "a", "ab" and "abc". 2. Use UIDs relative to parent's UIDs. For example if node "a" has UIDs 1,3,5 and "ab" is added for UID 5, the UID is changed to 2 (3th in 1,3,5 list - 1). This can help the compression a lot. The best case scenario for the above example is if "ab" contains also 1,3,5 UIDs. Then it can be written with a single 0-2 range. With these changes, the indexer can be configured to perform in different ways. Text can be indexed in two ways: full words, and substrings within those words (as required by IMAP). I think a useful combination of these would be to index all 4 character substrings and all full words up to 10 characters or so. This kind of an index can answer: - Search string <= 4 characters: Definite yes/no - For X-BODY-FAST / X-TEXT-FAST: - Search string 5-10 characters: Definite yes/no - Search string 11+ characters: Probable yes / definite no - For standard IMAP SEARCH: - Search string 5-10 characters: Definite yes if message contains the key as non-substring, otherwise same as below. This helps only if user does a search that matches a lot of messages. - Search string 11+ characters: Probable yes / definite no UTF-8 text is indexed as bytes, but the path depth can be counted as characters instead of as bytes. I've a test program finished, and unless there are some bugs left I think it shows that this can work pretty well: Squat-like 4 byte substrings (but can answer 1-3 char queries also): Message count: 7495 Index time: 4.19 CPU seconds (7.39MB/CPUs) Node memory: 3014072 bytes (2943 kB) in 90550 nodes UID memory: 8277212 bytes (8083 kB) in 352778 lists Total: 11291284 / 32474899 bytes = 34.77% Indexing the same mailbox file with squat-test gives: - Index time: 9.55 CPU seconds, 9.63 real seconds (3.24MB/CPUs) - 4145192 bytes in 102208 nodes (12.76%) - 7286058 bytes in 305501 uid_lists (22.44%) - 11431250 bytes total of 32474899 (35.20%) So the new indexer is over twice as fast and uses slightly less space. Indexing 4 char substrings and words up to 10 chars: Index time: 5.13 CPU seconds (6.04MB/CPUs) Node memory: 6002804 bytes (5862 kB) in 615501 nodes UID memory: 9044610 bytes (8832 kB) in 519488 lists Total: 15047414 / 32474899 bytes = 46.34% So it takes somewhat more space, but definitely less than having both Squat + Lucene. No substring indexing, words up to 10 chars (Lucene replacement): Index time: 1.39 CPU seconds (22.28MB/CPUs) Node memory: 3297663 bytes (3220 kB) in 548540 nodes UID memory: 1803735 bytes (1761 kB) in 213554 lists Total: 5101398 / 32474899 bytes = 15.71% Is there a need for Lucene anymore with this kind of a speed and disk space usage? :) The above tests are run with everything being indexed except space and control chars (ie. practically space + tab). If only alphanumeric characters are indexed, the total lines are (in same order as above): Total: 7048664 / 32474899 bytes = 21.70% (-13.07%) Total: 9610543 / 32474899 bytes = 29.59% (-16.75%) Total: 3963335 / 32474899 bytes = 12.20% (-3.51%) There are probably still a few optimizations that can be done to get the disk space usage even lower. I did spent quite a lot of time making it use less CPU though. Even tried a bit different coding style variations in the critical functions to get gcc to create faster code.. One interesting thing I noticed was that binary searching a character from a char array was slower than just sequentially going through the characters. I tried adding checks to do it only if the array was big, but it was always slower. Maybe something to do with CPU cache. If you want to try yourself, the test program is in http://dovecot.org/tmp/new-indexer.c

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Re: [Dovecot] SSL/TLS with Outlook client
by Nikolay Shopik 14 Nov '07

14 Nov '07

Agree with Hugo most root CA have intermidate certificates which should supplied with your server certificate. Otherwise chain won't work and any client don't trust it. - original message - Subject: Re: [Dovecot] SSL/TLS with Outlook client From: Hugo Monteiro <hugo.monteiro(a)fct.unl.pt> Date: 14/11/2007 00:14 Eli Sand wrote: > Hugo Monteiro wrote: > >> Ah ... wildcard certs .. from what i recall, certs issued like >> *.example.com were not very well accepted by M$ clients. You should >> test against non wildcard certs and see how it behaves. >> > > Already have and no luck :( My domain is elisand.com and I have tried > *.elisand.com, mx1.elisand.com (I believe that's what my MX record is... if > not, whatever it is is what I tried) and mail.elisand.com which is the > smtp/imap server name I use in Outlook. All three yield the same result :( > > Eli. > > > I have taken the liberty to connect to your server, using openssl, i've seen the following: $ openssl s_client -CApath /usr/share/ca-certificates/cacert.org/ -connect mail.elisand.com:993 CONNECTED(00000003) depth=1 /O=Root CA/OU=http://www.cacert.org/CN=CA Cert Signing Authority/emailAddress=support(a)cacert.org verify return:1 depth=0 /CN=*.elisand.com verify return:1 --- Certificate chain 0 s:/CN=*.elisand.com i:/O=Root CA/OU=http://www.cacert.org/CN=CA Cert Signing Authority/emailAddress=support(a)cacert.org --- i believe you should change two things. If the name you wish to use on your clients is mail.alisand.com, then the certificate should read CN=mail.elisand.com. Furthermore, it's always a good idea to provide the chaining certificate path on dovecots side. Try using the ssl_ca_file directive on dovecot's configuration. Regards, Hugo Monteiro. -- ci.fct.unl.pt:~# cat .signature Hugo Monteiro Email : hugo.monteiro(a)fct.unl.pt Telefone : +351 212948300 Ext.15307 Centro de Informática Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa Quinta da Torre 2829-516 Caparica Portugal Telefone: +351 212948596 Fax: +351 212948548 www.ci.fct.unl.pt apoio(a)fct.unl.pt ci.fct.unl.pt:~# _

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[Dovecot] Using Dovecot as Asterisk PBX voicemail server
by Kenneth Porter 14 Nov '07

14 Nov '07

I'm reading the Asterisk book, 2nd edition, and it describes how one can set up voicemail to be delivered by IMAP to a voicemail folder. Asterisk can monitor flags on the folder so that the "message available" light on one's phone tracks the state of the "read" flag in the folder. One can either dial in for one's voicemail or listen to it from one's favorite IMAP client. (Dovecot is mentioned in the book.) I'm wondering how one would set up auth for this? Asterisk needs to log in to the account to deliver the voicemail and to check its state, but I wouldn't want to put everyone's mail password in plaintext in Asterisk's voicemail.conf file. Would I set up a separate IMAP account for each user to hold their voicemail, and use simple passwords (such as the PIN they use for phone access to voicemail) in the Asterisk config? Or is there a way to set up Dovecot to allow a second user to login to a specific IMAP folder in all accounts, in the same way the local delivery agent has write access to all users' mailbox? Google's page for the book: <http://books.google.com/books?id=vtQxJ3oSm64C&dq=asterisk+book> Dovecot mentions: <http://books.google.com/books?id=vtQxJ3oSm64C&dq=asterisk+book&q=dovecot#se…>

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[Dovecot] namespace public folders
by Nikolay Shopik 13 Nov '07

13 Nov '07

Hi list, Here is thing im trying to accomplish. I would like to setup public folders which resposible for delivering mails for some speical addresses like info(a)example.com. And it will be perfect if "seen" status for this folder will be saved per user. I mean if one user read message and set it as read other user should see it still as unread. As I far i know there some limitation in 1.0 tree but not in lates 1.1. My question is can I do such setup with dovecot+postfix. Im really appreciate for simple examples how can i accomplish this kind setup if it possible :)

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[Dovecot] Caching?
by Bjørn T Johansen 13 Nov '07

13 Nov '07

Any way to minimize the number of sql statements that dovecot do? (and I tried adding userdb prefetch { } but number of sql calls are still the same) Am I doing something wrong or? Regards, BTJ -- ----------------------------------------------------------------------------------------------- Bjørn T Johansen btj(a)havleik.no ----------------------------------------------------------------------------------------------- Someone wrote: "I understand that if you play a Windows CD backwards you hear strange Satanic messages" To which someone replied: "It's even worse than that; play it forwards and it installs Windows" -----------------------------------------------------------------------------------------------

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