- dovecot - dovecot.org

[Dovecot] Backing up mail
by Davide Bolcioni 14 Jul '06

14 Jul '06

Greetings, in backing up mail stored according to default_mail_env = mbox:~/mail/:INBOX=/var/mail/%u is it safe *not* to backup the .imap subdirectory ? I am currently using dovecot-0.99.13-3.FC3. When restoring, I guess the safe option would be to zap the contents of .imap so that it gets rebuilt, correct ? Thank you for your consideration, Davide Bolcioni -- Paranoia is a survival asset.

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[Dovecot] TLS Issues - Plain Text login?
by Timothy White 14 Jul '06

14 Jul '06

I'm trying to setup IMAP, so that it works via secure connections. I have it working fine over SSL, now I wish to get TLS to work. I have set imap and imaps to both listen on *, and have disable_plaintext_auth = yes, which according to the docs, Disable LOGIN command and all other plaintext authentications unless SSL/TLS is used (LOGINDISABLED capability). So the problem is now, that TLS doesn't work. Trying it with thunderbird, I get a message about login being disabled, and to check my settings and such. The port is correct (imap, not imaps), and I have it to always use TLS. I see the following in my logs Jul 14 16:35:46 mafeking dovecot: imap-login: Aborted login: rip=58.7.136.163, lip=203.30.47.34, TLS Any ideas? To me it appears to be using TLS, so why doesn't thunderbird work? Is it the LOGINDISABLED capa keyword? Is it dovecot telling Thunderbird the wrong capa when using TLS? It all works fine with SSL, and the port (in thunderbird) set to the imaps port. The logs show lines like below when using SSL. Jul 14 16:36:32 mafeking dovecot: imap-login: Login: user=<joeblogs>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured Any ideas? Or should I just force SSL? Thanks Tim (using RC2) -- Linux Counter user #273956 Don't email joeblogs(a)scouts.org.au

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[Dovecot] How to create rules?
by Romeo Theriault 14 Jul '06

14 Jul '06

Hi, I have dovecot installed and working fine. I would like (server side) a rule runs on all messages and if it finds certain words in the message it will run a script which will send a new email. How can I create these rules? Do I need another piece of software? Thank you, Romeo

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Re: [Dovecot] Squirrelmail Change Dovecot Password Plugin
by Cecil S. Nutakor 14 Jul '06

14 Jul '06

Having a plugin that allows squirrelmail to change Dovecot's password would depend entirely on how you have your Dovecot passwords stored. Peter your right, My Dovecot passwords are stored in /etc/dovecot/passwd and Dovecot users stored in /etc/dovecot/users Thanks > On 7/13/2006 07:42, Cecil S. Nutakor seems to have typed: >> After a moment i noticed that i could make the users change their own >> passwords using squirrelmail, but unfortunatly for me after googling >> around the Internet and also visiting squirrelmail plugin page i could >> not >> find a change Dovecot password plugin for squirrelmail. > > If your Dovecot passwords are stored as system passwords, then you would > have to allow PHP (squirrelmail) to change system passwords. Currently, > I have SQL store my Dovecot passwords (which are actually used for > a lot of different authentication purposes), so it was trivial to write > a page that allows users to change the password in the SQL database and > would be easy to add this to squirrelmail if you wanted, but given how > many ways that Dovecot can use for authentication, a generic plugin that > works for all of them would be extraordinarily difficult (and a security > risk for some of the password storage methods - you don't want PHP to > be able to edit your /etc/passwd if you are using *BSD/*nix) > Office Of The SYSTEMS ARCHITECT DISCOVERYTEL GH

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[Dovecot] dovecot 1.00 RC2 bugs
by Alexander Zagrebin 14 Jul '06

14 Jul '06

imho, dovecot 1.00 RC2 has two bugs at the maildir quota implementation 1. Incorrect calculation of used storage and count of messages When calculating, dovecot counts "." and ".." directory entries. So, if there are no subdirs and messages in maildir, maildirsize still shows 4 messages and some used storage. My workaround is --- src/plugins/quota/quota-maildir.c.orig Sun Jun 11 21:36:24 2006 +++ src/plugins/quota/quota-maildir.c Thu Jul 13 11:33:58 2006 ======================================================== @@ -82,6 +82,8 @@ len = str_len(path); while ((dp = readdir(dirp)) != NULL) { + if (!strcmp(dp->d_name, ".")) continue; + if (!strcmp(dp->d_name, "..")) continue; p = strstr(dp->d_name, ",S="); num = (uoff_t)-1; if (p != NULL) { ======================================================== This patch skips special directory entries. 2. Under some condition maildirsize contains invalid data Consider a such situation 1. User begins pop3 session 2. dovecot calls this sequence of procedures maildir_quota_transaction_begin -> maildirquota_refresh -> maildirsize_read While reading maildirsize's data, may be situation when mailbox size must be recalculated (maildirsize greater 5120, quotas was changed...). In this case dovecot closes maildirsize's file descriptor (root->fd) and assigns it "-1". After that code calls maildirsize_recalculate -> maildirsize_write So maildirsize is rewritten and contains valid data. BUT file descriptor (root->fd) still contains "-1" 3. User retrieves and deletes some messages, then quits. So maildirsize must be updated. 4. Code calls maildir_quota_transaction_commit, but root->fd equals "-1", so maildirsize_update doesn't calls and maildirsize contains incorrect (obsolete) data My workaround is ======================================================== --- src/plugins/quota/quota-maildir.c.orig Sun Jun 11 21:36:24 2006 +++ src/plugins/quota/quota-maildir.c Thu Jul 13 11:33:58 2006 @@ -246,11 +248,12 @@ return -1; } - if (file_dotlock_replace(&dotlock, 0) < 0) { + if (file_dotlock_replace(&dotlock, DOTLOCK_REPLACE_FLAG_DONT_CLOSE_FD) < 0) { mail_storage_set_critical(storage, "file_dotlock_replace(%s) failed: %m", path); return -1; } + root->fd = fd; return 0; } ======================================================== This patch preserves fd after writing recalculated maildirsize file, and when maildir_quota_transaction_commit is called, root->fd contains valid file descriptor. -- Alexander Zagrebin

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[Dovecot] pop3s Authentication Issues, Continued
by Bruce Lane 14 Jul '06

14 Jul '06

Fellow Dovecot'ers. I tried something tonight that I should have done a while back: Turned on verbose logging in the authentication section. I'm still unable to get the mail client I'm experimenting with (Pegasus) to complete a pop3s connection, in that I still get an indication of a failed password. However, at least I'm a little closer to understanding the failure itself. Please note what came up in /var/log/maillog. Jul 13 22:41:25 featherweb dovecot: auth(default): client in: AUTH 1 PLAIN service=POP3 secured lip=192.168.42.130 rip=192.168.42.40 resp=AGt5cnJpbgBocDIxZHZlbTc= Jul 13 22:41:25 featherweb dovecot: auth(default): cache(kyrrin(a)bluefeathertech.com,192.168.42.40): User unknown Jul 13 22:41:26 featherweb dovecot: auth(default): client out: FAIL 1 user=kyrrin(a)bluefeathertech.com More specifically: Take a good hard look at the end of the second line. Why in the Multiverse would the thing consider me an unknown user? Unless it's not really checking /etc/passwd at all...? Excerpt from dovecot.conf follows. -=-=-=-=-=-=-=-=- auth default { # Space separated list of wanted authentication mechanisms: # plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi mechanisms = plain login passdb passwd { } userdb passwd { } socket listen { client { path = /var/spool/postfix/private/auth mode = 0660 user = postfix group = postfix } } } As a point of interest, SENDING mail via a secure connection (SMTP AUTH via STARTTLS) is working quite well. I'm beginning to think that the OpenSSL installation isn't authenticating properly...? Insights welcome. Thanks much. -=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com kyrrin (at) bluefeathertech do/t c=o=m "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"

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[Dovecot] [Fwd: [PATCH] Dovecot-1.0rc2 MANAGESIEVE]
by Timo Sirainen 14 Jul '06

14 Jul '06

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Re: [Dovecot] Error: imap-login: Can't connect to auth server at default: Resource temporarily unavailable
by Matt Roman 13 Jul '06

13 Jul '06

It appears the problem is in this function: int net_connect_unix(const char *path) { struct sockaddr_un sa; int fd, ret; memset(&sa, 0, sizeof(sa)); sa.sun_family = AF_UNIX; if (strocpy(sa.sun_path, path, sizeof(sa.sun_path)) < 0) { /* too long path */ errno = EINVAL; return -1; } /* create the socket */ fd = socket(PF_UNIX, SOCK_STREAM, 0); if (fd == -1) { i_error("socket(%s) failed: %m", path); return -1; } net_set_nonblock(fd, TRUE); /* connect */ ret = connect(fd, (void *)&sa, sizeof(sa)); if (ret < 0 && errno != EINPROGRESS) { close_keep_errno(fd); return -1; } return fd; } This function is returning -1 and the server is crashing - Most likely because of a socket error. The error message from the socket is "Resource temporarily unavailable" If anybody knows why that would happen, I might be able figure out a solution. Thanks!

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[Dovecot] maildir++ quota bug...
by Joseph W. Breu 13 Jul '06

13 Jul '06

Running RC2 with maildrop and MDA: dovecot writes a positive quota count, then the negative quota count on messages delivered with maildrop. For example, message #1 arrives via maildrop: 4488236 1 message is deleted via dovecot: 4488236 1 -4488236 -1 This does not happen when the user accesses the message, only when it is deleted. The user never gets credit for deleting the file and their quota continues to grow. I did not notice this behaviour until now, but I just tested with rc1 and it is present there as well. Thanks, --------------------------------------------------------- Joseph W. Breu, CCNA phone : +1.319.268.5228 Senior Network Administrator fax : +1.319.266.8158 Cedar Falls Utilities cell : +1.319.493.1686 support: +1.319.268.5221 url : http://www.cfu.net

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[Dovecot] proxy load-testing
by Vincent Fox 13 Jul '06

13 Jul '06

I found the proxy performance page in the Wiki. It's interesting to see such good performance for the proxy! However, I was trying to duplicate the tests and am not clear how. Anyone know what a typical test setup would look like? I need to document/test that I can setup a proxy able to handle 100-200 sessions per second which the folks around here are skeptical of. I emailed Tomi directly but got a vacation reply. I tried a quick test of my own with rabid and results seem questionable. Probably I am not using the right options on the command-line. I used a single client to generate the load and while I specified 20,000 per minute when I checked the maillog on my IMAP server it was authentication more like 300 per minute. I get a number of "Re-auth failure" messages even with 3720 accounts. I think this is due to the randomness being literal sometimes you hit again the same account name while a first attempt of it is still connected. Also not sure how Tomi generated those statistics, from the logs, from the rabid output? Since rabid doesn't do POP-mark numbers or anything I guess you just ramp up the load until the proxy slows down and call that your performance number?

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