- dovecot - dovecot.org

Re: [Dovecot] Performance, dovecot vs tpop3d
by Nate 31 Jan '07

31 Jan '07

At 09:01 PM 1/30/2007, Curtis Maloney wrote: >Nate wrote: >>Perhaps another test i'll run, just to compare apples to apples >>tomorrow would be to use a memory index with dovecot as well, and >>see if that drops the I/O load to the same as when tpop3d is running. > >Speaking of "Apples to Apples", you might want to try with >INDEX=MEMORY on Dovecot, see how that fares. > >If your users are only POP3 and download all messages at once, not >keeping mail on the server, you can (iirc) disable indexing >altogether, since it's a wasted effort. That test was on my list to try out today. I ran the test, and performance was severely degraded. Upon every new login, the entire index was rebuilt. So with any login it takes the full ~30 seconds to rebuild the index on a 17000 email user. I've confirmed also that tpop3d is doing no indexing whatsoever on disk. It isn't even compiled with that option. So it seems it is probably disk caching which is assisting tpop3d with returning a 2nd login (within a few minutes) so quickly. I wish it were the case that all users downloaded messages, but it seems all too often users click the 'leave messages on server', and never expire them. We have quite a few users (thousands probably) in that condition. We occasionally delete old stuff. Did I hear about an expire plugin upcoming? That would be useful. - Nate

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[Dovecot] Sieve and LDA
by Vincent Bernat 31 Jan '07

31 Jan '07

Hello ! I have started to use Sieve support in LDA. From the RFC a same message should not be delivered twice in the same folder : ,---- | 2.10.3. Message Uniqueness in a Mailbox | | | Implementations SHOULD NOT deliver a message to the same folder more | than once, even if a script explicitly asks for a message to be | written to a mailbox twice. | | The test for equality of two messages is implementation-defined. | | If a script asks for a message to be written to a mailbox twice, it | MUST NOT be treated as an error. `---- Dovecot seems to ignore this "SHOULD NOT" or am I missing something ? At first, I thought they were speaking of case where there is two idententic "fileinto" directive in the ruleset. Something like : fileinto "box"; fileinto "box"; But, I don't think that they would they "the test for equality of two messages" with such a trivial case. Maybe dovecot should maintain a list of recent message-id seen for each user (with the associated mailbox). -- I WILL ONLY DO THIS ONCE A YEAR I WILL ONLY DO THIS ONCE A YEAR I WILL ONLY DO THIS ONCE A YEAR -+- Bart Simpson on chalkboard in episode 3F31

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[Dovecot] IMAP on move message command launch
by Jan Srzednicki 31 Jan '07

31 Jan '07

Hello, Is it possible with dovecot IMAP server to do the following thing: After the clients moves a message from any folder to the given one, I want to launch a command and feed that message into it, as well as physically move the message to this folder. Is that possible? -- Jan Srzednicki w(a)expro.pl

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[Dovecot] Need help with "mbox sync" problem
by Jim Garrison 31 Jan '07

31 Jan '07

The following is occurring consistently on users in only one vhost domain. Other vhost domains are not having the problem. The email client in use is the same (in both the working and non-working domains). dovecot: Jan 29 21:19:18 Error: POP3(user1(a)mydomain.tld): mbox sync: UID inserted in the middle of mailbox /var/mail/vhosts/mydomain.tld/user1 (5629 > 5423, seq=2, idx_msgs=5) dovecot: Jan 29 21:19:18 Info: POP3(user1(a)mydomain.tld): Disconnected: Logged out top=0/0, retr=95/508506, del=95/95, size=506866 dovecot: Jan 29 21:19:52 Error: POP3(user2(a)mydomain.tld): mbox sync: UID inserted in the middle of mailbox /var/mail /vhosts/mydomain.tld/user2 (5634 > 5629, seq=2, idx_msgs=95) dovecot: Jan 29 21:19:52 Info: POP3(user2(a)mydomain.tld): Disconnected: Logged out top=0/0, retr=5/69654, del=5/5, si ze=69562 Once this message starts occurring, dovecot stops deleting retrieved messages when the user retrieves mail (with 'delete from server' set). The result is that the entire mailbox contents are fetched each time, resulting in copious amounts of duplicate messages. I'm on the rc8 RPM that comes with FC5, but am willing to remove it and install a later Dovecot built from source. 1) Is this a known problem that can be fixed by upgrading? 2) If not, can someone tell me what this message means exactly, and how to gather more information for debugging? The MTA is Postfix. Thanks

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[Dovecot] OT:install dovecot using yum
by jepoy 31 Jan '07

31 Jan '07

hi guys, im trying to install dovecot using yum on my centos. anyone tried this? tnx -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Re: [Dovecot] Dovecot ACL
by Radek Zavicak 31 Jan '07

31 Jan '07

>I am using 1.0-rc19 version. I made a global ACL file in >/etc/dovecot-acls/Public as: >owner lrsi >user=manager rl > >The owner cannot delete/move mail inside his Public folder as I want. But >the user "manager" cannot subscribe/view to other's Public folder. What I >have missed? Make sure your acl file ends with LF (there is an empty line at the end) otherwise dovecot doesn't read the last line.

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[Dovecot] Fw: error after installation
by jepoy 31 Jan '07

31 Jan '07

----- Original Message ----- From: "jepoy" <jcb(a)dream.com.ph> To: <lrosa(a)hypertrek.info> Sent: Wednesday, January 31, 2007 1:43 PM Subject: Re: [Dovecot] error after installation > > ----- Original Message ----- > From: "Luigi Rosa" <lrosa(a)hypertrek.info> > To: "Dovecot Mailing List" <dovecot(a)dovecot.org> > Sent: Wednesday, January 31, 2007 1:26 PM > Subject: Re: [Dovecot] error after installation > > >> jepoy said the following on 31/1/2007 6:22: >> >>> -ERR Plaintext authentication disallowed on non-secure connections. >> >> check dovecot.conf for >> >> disable_plaintext_auth = no >> >> >> Ciao, >> luigi >> > hi luigi, > thanks for that quick response. here's my next problem.before i havent > encountered them when i use yum. > > +OK Dovecot 1.0 ready. > user jcb > +OK > pass jcb > -ERR Authentication failed. > > tnx > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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[Dovecot] error after installation
by jepoy 31 Jan '07

31 Jan '07

hi guys, i tried installing it from source. i tried logging in with my user and password, experienced this error. +OK Dovecot 1.0 ready. user test -ERR Plaintext authentication disallowed on non-secure connections. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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[Dovecot] How to prevent SQL injection
by Jochen Schulz 31 Jan '07

31 Jan '07

Hi, on my way home today I thought a little bit about my setup which involves user and password lookups in an SQL database (Postgres). I asked myself whether I need to do anything to prevent SQL injection via forged user or domainnames. In the wiki I didn't find anything specific, only http://wiki.dovecot.org/Variables which mentions that there is the %E modifier which escapes single quites and backslashes. This appears to be a good idea but I am asking myself whether I need to do this since it is not mentioned anywhere. Is anybody able to comment on this? And BTW, it appears that one can use several modifiers at once. This is only implicitly mentioned in the wiki (You can apply modifier*s*), but it appears to work. J. -- Ultimately, the Millenium Dome is a spectacular monument of the doublethink of our times. [Agree] [Disagree] <http://www.slowlydownward.com/NODATA/data_enter2.html>

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Re: [Dovecot] Performance, dovecot vs tpop3d
by Joseph Tam 31 Jan '07

31 Jan '07

>> 2. logout, log back in immediatly, there is no re-indexing and the >> list is available in < 1 second. >> 3. logout, log back in 12 minutes later. The list is returned in >> apx 15 seconds and again in a lsof I see pop3 accessing files inside >> the cur/ directory. ... > > Of added note, when running a stat on the index files (dovecot.index, > dovecot.index.cache, dovecot.index.log), the Modify and Change > parameters remain static (no changes). So if it's rebuilding > anything it's doing it in memory and not modifying the index files. > > If I deliver a new message to the account, it does rebuild the files > for sure and increments the Modify and Change params. Perhaps what you might be seeing is file system caching. I notice this when performing NFS I/O tests: the first re-read is fast but decays over time as data is rolled out of the cache. Joseph Tam <tam(a)math.ubc.ca>

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