March 2006 - dovecot - dovecot.org

[Dovecot] Per-user "Seen" flags with shared namespace stored as maildir?
by Mark Lidstone 25 Mar '06

25 Mar '06

Hi all, I was wondering if the above was possible. I know that the "seen" flag is stored in the filename, but was wondering if anyone knew of a way to separate it out? I know this would strictly-speaking break maildir compatibility, but it would be extremely useful for shared folders. I've been given the task of replacing the (extremely heavily used) shared folders functionality of our Exchange server and have almost everything working. I have authentication working against AD, shared folders, per-user subscriptions, "mail enabled folder" functionality and seem to have sorted all the other permissions issues I've been having. Apart from a nice easy-to-use front end for changing folder permissions this is the last thing I can think of that I need to look into before I can show this to my boss. Any help would be greatly appreciated, Mark Lidstone IT Administrator BMT Nigel Gee & Associates Ltd Floors 1-3, Building 14, Shamrock Quay, William Street, Southampton SO14 5QL UK Tel: 023 8022 6655 Fax: 023 8022 8855 Visit Our Website: <http://www.ngal.co.uk> CONFIDENTIAL The information contained in this e-mail and any attachment is confidential. It is intended only for the named addressee(s). If you are not the named addressee please notify the sender immediately and do not disclose, copy or distribute the contents to any other person other than the intended addressee(s). VIRUSES The contents of an attachment to this e-mail may contain software viruses which could damage your own computer system. While BMT Nigel Gee and Associates Ltd has taken every reasonable precaution to minimise this risk, we cannot accept liability for any damage which you sustain as a result of software viruses. You should carry out your own virus checks before opening the attachment.

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[Dovecot] dovecot(last day cvs version) lost mail
by John Wong 25 Mar '06

25 Mar '06

i find a problem, after upgrade dovecot to last day cvs version, each folder only can see the first one arrived new mail, other new mail is lost i see this message in mail log: -------------------------------------------------------- Fixed index file mail/username/.foldername/dovecot.index: first_recent_uid_lowwater 146 -> 145 Corrupted index file mail/username/.foldername/dovecot.index: Duplicate header extension keywords -------------------------------------------------------- openbsd/i386, postfix-2.3x, dovecot(last day cvs version)

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[Dovecot] Authentication without password
by Feraudet Cyril 25 Mar '06

25 Mar '06

Hi all, for one of my developpements, I need to be able to connect an IMAP server with a login but without password. (I use dovecot 1.0.beta3) For the userdb, I use "userdb static" : userdb static { args = uid=114 gid=114 home=/mydev/mail/%u } But I don't know how to allow IMAP connection by my application without password. I won't connect to a database, having a user/password file or something like this ... I think to use "passdb checkpassword" to call a fake authentication script .... Anyone have a better idea ? Thanks, Cyril Feraudet

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[Dovecot] How Can I Add New Flags
by Sezai KARATOZ 25 Mar '06

25 Mar '06

Hi all, I am new in Dovecot. I wanna use Dovecot in the big mail system about 4 million active or passive users. We use recently Courier Imap, but search mails process is so slowly. I tried Dovecot that it is better then Courier so much. But I have a problem with integration Dovecot to my system. I am using some extra flags in mails to mark them from others. For example I use a private flag "M" to understand it that this mail come from us as newsletter. I make some changes in code, but unfortunately I could'nt add this flag to Dovecot correctly. Please help me it that how can add this flag. I use maildir type Thanks, Sezai

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[Dovecot] Shared namespaces
by Mark Lidstone 25 Mar '06

25 Mar '06

Hi all, I'm trying to replace the "Public Folders" functionality in Exchange server. At first I thought it'd be something easily do-able with an IMAP server so I immediately thought of Dovecot. I setup what I though would work and things started to go a little screwy with subscription settings and the like. I started off by making a public maildir folder (in /home/public/Maildir) and setting the namespaces up in /usr/local/etc/dovecot.conf like this: namespace private { separator = / prefix = INBOX/ location = maildir:%h/Maildir inbox = yes } namespace public { separator = / prefix = Public/ location = maildir:/home/public/Maildir inbox = no hidden = no } The folder /home/public/Maildir has owner root:users and mode 770, and the file dovecot-shared in there has the same owner and mode 660. I logged with Thunderbird as user 1 and everything seems to work fine. However, when I logged in as user 2 I was getting all kinds of errors. On checking the permissions of /home/public/Maildir/subscriptions it was user1:user1 with mode 600. So then I thought "well, I'll change it to user1:users 660 and then everyone should be able to change it". I was very wrong. Whenever someone changed it, the ownership changed to userx:userx 600. Even when I tried setting the ownership to root:users and mode to 640, anyone could change it and set it to their own name (thus preventing anyone else from using it). To be perfectly honest, I'd ideally like to give people separate subscription settings anyway. I thought about symlinking the folders in, but that makes it a manual process to add new folders to everyone's maildirs. Can anyone please give me any pointers? Many thanks, Mark Lidstone IT Administrator BMT Nigel Gee & Associates Ltd Floors 1-3, Building 14, Shamrock Quay, William Street, Southampton SO14 5QL UK Tel: 023 8022 6655 Fax: 023 8022 8855 Visit Our Website: <http://www.ngal.co.uk> CONFIDENTIAL The information contained in this e-mail and any attachment is confidential. It is intended only for the named addressee(s). If you are not the named addressee please notify the sender immediately and do not disclose, copy or distribute the contents to any other person other than the intended addressee(s). VIRUSES The contents of an attachment to this e-mail may contain software viruses which could damage your own computer system. While BMT Nigel Gee and Associates Ltd has taken every reasonable precaution to minimise this risk, we cannot accept liability for any damage which you sustain as a result of software viruses. You should carry out your own virus checks before opening the attachment.

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[Dovecot] plugins
by Brian Wilson 25 Mar '06

25 Mar '06

I just signed up for the mailing list. I saw a thread a few days ago referencing dspam plugin and saying a page would be updated, but I cannot find any documentation on dovecot plugins anywhere except mentions in this archive... can someone direct me to the plugins page? I am trying to implement drac plugin. Compiles fine. Just need config data. Brian

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[Dovecot] [PATCH] OpenSSL RNG initialization
by Vilmos Nebehaj 25 Mar '06

25 Mar '06

Hi, dovecot tries to use OpenSSL's PRNG to generate random numbers if there is no /dev/urandom found. Unfortunately, it is flawed in its present form, since the PRNG is not seeded before RAND_bytes() is called in src/lib/randgen.c (on systems which have /dev/urandom, OpenSSL automatically seeds its PRNG from the urandom device). Here's a patch to address this issue: it tries to seed the PRNG if there is no /dev/urandom present (which is likely the case if dovecot uses OpenSSL's RAND API). It can also be fetched from http://innoidea.com/~vili/dovecot_rng_init.diff -Vilmos Nebehaj Index: configure.in =================================================================== RCS file: /home/cvs/dovecot/configure.in,v retrieving revision 1.266 diff -u -r1.266 configure.in --- configure.in 28 Feb 2006 08:36:41 -0000 1.266 +++ configure.in 10 Mar 2006 17:15:01 -0000 @@ -358,7 +358,8 @@ AC_CHECK_FUNCS(fcntl flock lockf inet_aton sigaction getpagesize madvise \ strcasecmp stricmp vsnprintf vsyslog writev pread \ setrlimit setproctitle seteuid setreuid setegid setresgid \ - strtoull strtouq setpriority quotactl getmntent kqueue kevent) + strtoull strtouq setpriority quotactl getmntent kqueue kevent \ + getrusage) dnl * I/O loop function have_ioloop=no Index: src/lib/lib.h =================================================================== RCS file: /home/cvs/dovecot/src/lib/lib.h,v retrieving revision 1.20 diff -u -r1.20 lib.h --- src/lib/lib.h 25 Sep 2005 10:44:04 -0000 1.20 +++ src/lib/lib.h 10 Mar 2006 17:15:02 -0000 @@ -20,6 +20,13 @@ # include <stdint.h> /* C99 int types, we mostly need uintmax_t */ #endif +#ifdef HAVE_SYS_TIME_H +# include <sys/time.h> +#endif +#ifdef HAVE_SYS_TIME_H +# include <sys/resource.h> +#endif + #include "compat.h" #include "macros.h" #include "failures.h" Index: src/lib/randgen.c =================================================================== RCS file: /home/cvs/dovecot/src/lib/randgen.c,v retrieving revision 1.13 diff -u -r1.13 randgen.c --- src/lib/randgen.c 6 Jan 2005 19:08:19 -0000 1.13 +++ src/lib/randgen.c 10 Mar 2006 17:15:03 -0000 @@ -81,6 +81,42 @@ return buf; } +static void random_init_rng(void) +{ + int counter = 0; + struct timeval tv; +#ifdef HAVE_GETRUSAGE + struct rusage ru; +#endif + + /* + * If the RNG is already seeded, we can return + * immediately. + */ + if (RAND_status() == 1) + return; + + /* + * Else, try to seed it. Unfortunately we don't have + * /dev/urandom, so we can only use weak random sources. + */ + while (RAND_status() != 1) { + if (gettimeofday(&tv, NULL) < 0) + i_fatal("gettimeofday() failed: %m"); + RAND_add((const void *)&tv, sizeof(tv), + (double)sizeof(tv) / 2); +#ifdef HAVE_GETRUSAGE + if (getrusage(RUSAGE_SELF, &ru) < 0) + i_fatal("getrusage() failed: %m"); + RAND_add((const void *)&ru, sizeof(ru), + (double)sizeof(ru) / 2); +#endif + + if (counter++ > 100) + i_fatal("could not get enough entropy"); + } +} + void random_fill(void *buf, size_t size) { if (RAND_bytes(buf, size) != 1) @@ -91,6 +127,8 @@ { unsigned int seed; + random_init_rng(); + random_fill(&seed, sizeof(seed)); srand(seed); }

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[Dovecot] Message Filenames
by Charlie Davis 25 Mar '06

25 Mar '06

Is there anyway to get a message's filename through the imap server? I've been developing a program for awhile and just switched to dovecot from courier. Courier had a file that for every line was like: <message uid> <message filename> Is there anway to get this information out of dovecot? -Charlie

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[Dovecot] first crack at auto-trash plugin
by David Powers 25 Mar '06

25 Mar '06

I have written an alpha version of an auto trash plugin for dovecot. When compiled in any mail expunged from a non-Trash folder is moved to a folder named Trash. As of yet the folder is not created if it doesn't exist (the process fails before expunge). I would appreciate feedback of any sort. In addition, I am currently getting an error I haven't been able to puzzle out in the logs when it runs: Mar 21 15:22:01 david dovecot: imap(david(a)grayskies.net): Timeout leak: 0x807fad0 I see that it seems to relate to transactions somehow, but my few hours of playing with dovecot haven't given me the answer - so ideas/patches to the code would also be nice. You can grab it here: http://wrath.grayskies.net/tarballs/auto-trash.tar.gz -David

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[Dovecot] Dovecot LDA + Fedora destribution = no go?
by Charlie Davis 25 Mar '06

25 Mar '06

Anyone know of a way to get the LDA to work on the fedora distribution available on yum? I'm a big fan of the whole yum-auto-updating thing but if this isn't possible, I'll go tarball. -Charlie

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