November 2005 - dovecot

[Dovecot] courier2dovecot migration script
by Arto Bendiken 03 Nov '05

03 Nov '05

Howdy, I've just migrated a couple of servers to Dovecot, and am loving it so far. I thought I'd share the courier2dovecot shell script I whipped together (based on the instructions I found in the wiki.dovecot.org migration how-to), for converting Courier-IMAP maildirs to Dovecot format. It can be downloaded from my home page: http://bendiken.net/scripts/ While the script is rather simple, it can save a fair bit of typing when migrating some hundreds of mail accounts... especially since Courier stores some of its own state files recursively in each folder of the maildir hierarchy, making it a real pain to otherwise manually rename or remove all of them. Here's a plain-English summary of what the script currently does, when given a Courier maildir path as an argument: - check that the given path is indeed a valid Courier maildir, and exit if not - rename the file 'courierimapsubscribed' to 'subscriptions', and strip the 'INBOX.' prefix from its contents - recursively rename all of files of the name 'courierimapuiddb' to 'dovecot-uidlist' - recursively delete all of files of the name 'courierimaphieracl', 'courierimapacl' and 'courierimapkeywords' The script will also verbosely print out each action it does, handy for redirecting the output to a log file for a large migration. I hope people about to jump ship from Courier to Dovecot find this useful. If anyone comes up with improvements to the script, please send them my way :-) Arto

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[Dovecot] Ambiguous ..... problem using Dovecot v1.0.alpha4 on OpenBSD 3.8
by snoop＠email.it 03 Nov '05

03 Nov '05

I verified that "default_mail_env" on my dovecot configuration file are "maildir:" correctly prefixed and ... permissions of /var/mail/mydomain and /var/mail/mydomain/myuser are 2755 and owner is root:mail. Dovecot user is member of mail group. I'm sure that isn't an authentication problem. I've tried some days to understand and to find over internet but I've not find a solution and now ... doesn't want to work. Someone can help me? _________________________________ Log output: dovecot: Nov 03 20:20:39 Error: imap(myuser(a)mydomain.com): Ambiguous mail location setting, don't know what to do with it: /var/mail/mydomain.com/myuser (try prefixing it with mbox: or maildir:) dovecot: Nov 03 20:20:39 Error: imap(myuser(a)mydomain.com): Failed to create storage with data: /var/mail/mydomain.com/myuser -- Email.it, the professional e-mail, gratis per te: http://www.email.it/f Sponsor: Registrazione dominio, 500 MB per la posta elettronica, spazio web a partire da 2,92 Euro al mese e in pi� assistenza gratis! clicca qui Clicca qui: http://adv.email.it/cgi-bin/foclick.cgi?mid=4079&d=3-11

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[Dovecot] assertion problems w/ 1.0alpha4
by Jeremy Brown 03 Nov '05

03 Nov '05

Hey list, I have been using 0.99.14 for a while now but recently decided to try to upgrade to 1.0alpha4 to get the latest and greatest. I'm building from source myself on a Slackware 10.0 machine. Slackware ships with UW-IMAP configured to keep your inbox in /var/spool/mail and your other folders in ~/. I've been using the same setup for dovecot so that the migration is smooth...so my default_mail_env is set to: default_mail_env = mbox:~/:INBOX=/var/mail/%u I'm able to connect to both pop and imap servers and authenticate myself, but as soon as I attempt to get a listing of my emails my dovecot setting crashes with the following in the mail logs: Nov 3 10:52:40 shallowhal dovecot: imap(jeremy): file mail-index-sync-ext.c: line 155 (get_ext_header): assertion failed: (memcmp((char *)(ext_hdr + 1), ext->name, strlen(ext->name)) == 0) I can trigger this over POP3 just by logging in, then issuing "USER username", "PASS password", and then "LIST". Anyone experienced anything like this before? Any ideas on what might be going on? I can include more debug information (like my dovecot.conf file) if it would help. Jeremy

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FW: [Dovecot] How to log POP3 events
by Cliff Hayes 03 Nov '05

03 Nov '05

Ok, I think I have that figured out. I made the following mods: disable_plaintext_auth = no pop3_uidl_format = %08Xu%08Xv and it seems to work. Now...about those enhanced logging capabilities. As promised, I see the enhanced logging. What does TOP and RETR mean? (I checked the manual first) Cliff -----Original Message----- From: Cliff Hayes [mailto:chayes@afo.net] Sent: Thursday, November 03, 2005 1:05 PM To: Chris Wakelin Subject: RE: [Dovecot] How to log POP3 events Logs say (with enhanced debugging turned on): Nov 3 12:58:38 sendmail dovecot: pop3-login: Login failed: Plaintext authentication disabled -----Original Message----- From: dovecot-bounces(a)dovecot.org [mailto:dovecot-bounces@dovecot.org]On Behalf Of Chris Wakelin Sent: Thursday, November 03, 2005 12:56 PM To: Cliff Hayes Cc: dovecot(a)dovecot.org Subject: Re: [Dovecot] How to log POP3 events Hmm, so what appears in the logs when you fail to authenticate? Have you tried the "debug" POP client :) ? telnet server 110 +OK University of Reading POP3 Server USER chris +OK PASS chrispassword +OK Logged in LIST 1 +OK 1 1234 QUIT +OK Logging out. Chris Cliff Hayes wrote: > Yes, that's what I have. I also found this: > > userdb prefetch { > } > > I must have missed that, so I commented that out and still had the same > problem. > > There is also this > > user = root > > in the auth default section. > > Cliff > > -----Original Message----- > From: dovecot-bounces(a)dovecot.org [mailto:dovecot-bounces@dovecot.org]On > Behalf Of Chris Wakelin > Sent: Thursday, November 03, 2005 11:27 AM > To: Cliff Hayes > Cc: dovecot(a)dovecot.org > Subject: Re: [Dovecot] How to log POP3 events > > > So what do you have for passdb and userdb? > > They should look something like > > auth default { > mechanisms = plain > > passdb shadow { > } > > userdb passwd { > } > > ... > > > (Earlier versions of 1.0, e.g. 1.0-stable, have just > > passdb shadow > userdb passwd > > ) > > Chris -- --+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+- Christopher Wakelin, c.d.wakelin(a)reading.ac.uk IT Services Centre, The University of Reading, Tel: +44 (0)118 378 8439 Whiteknights, Reading, RG6 2AF, UK Fax: +44 (0)118 975 3094

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[Dovecot] How to log POP3 events
by Cliff Hayes 03 Nov '05

03 Nov '05

Hello all, Thanks for your help getting me started. I have Dovecot running now. When I troubleshoot customer email problems, I need to be able to see the number of emails they popped. In /var/log/maillog, Dovecot just tells me that they authenticated, but not what happened after they authenticated. With pop3d, I saw how many emails they popped. Can I set that in Dovecot? I checked the documentation and couldn't find anything. I also turned on the "auth_verbose = yes" and "auth_debug = yes" -- but as the name implies, I only got more authentication info. Nothing about files tranferred. Thanks, Cliff

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[Dovecot] Vpopmail authentication problem
by [Mailclub] Laurent Bauer 03 Nov '05

03 Nov '05

Hello, I have a problem setting dovecot-1.0 / vpopmail authentication with virtual users. Here is my dovecot.conf (the part related to vpopmail) : passdb = vpopmail userdb = vpopmail default_mail_env = maildir:/home/domains/%d/users/%n I recompiled dovecot with "verbose" option and keep getting this error : Nov 3 11:10:58 ***** dovecot: auth(default): vpopmail(lb(a)mm.fr): unknown user (lb(a)mm.fr) whatever user/domain/password I am testing (including the correct one, of course) This is in src/auth/userdb-vpopmail.c line 35 : vpw = vauth_getpw(vpop_user, vpop_domain); According to the makefile, the binary was built with -L/home/vpopmail/lib and -I/home/vpopmail/include options ("standard" qmail/vmailmgr/vpopmail installation) so it should be ok ? I checked the permissions by setting a shell for vpopmail user, then 'su vpopmail' and read/write the password.cdb file. What could be wrong ? Has anybody got a sample config file / dovecot version working with vpopmail and virtual users, or an idea of what could be wrong in my config ? Thanks a lot. Laurent

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[Dovecot] double posts
by Chris L. Franklin 02 Nov '05

02 Nov '05

Is any one else getting double posts from this list ? -- -- Chris L. Franklin -- ________________________________________________________________________ This email was scanned by the server at NomadCF.com, And has been deemed clean of invaild and or dangerous email attachment type and virus'. Although this is by no means a guarantee. ________________________________________________________________________

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RE: [Dovecot] New Fedora/Sendmail Install Assistance
by Jakob Hirsch 02 Nov '05

02 Nov '05

Please keep list traffic on the list! Cliff Hayes wrote: > We are using Dovecot 0.99.14 Ok. Haven't used this for quite a while, so I don't know if I can really help you. > auth_userdb = passwd > auth_passdb = shadow Dovecot uses the homedir that's in your passwd then. But I wonder how you want to use IMAP. AFAIK, it needs a separate directory for every user anyway. At least the indexes etc. have to be stored somewhere. You should really read doc/mail-storages.txt: "mbox storage requires an IMAP root directory where to store IMAP folders and some other information..." I you can't provide a directory for every user, dovecot is probably not the software for you.

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[Dovecot] Still corrupt indexes in 1A4
by Alen Salamun 02 Nov '05

02 Nov '05

Hello All! Well I still have users which almost daily get corrupt dovecot files in their IMAP folders (Maildir style) and are unable to read their mail in this particular folders. When I delete dovecot files in this folder (rm -rf dove*) user can again read all messages. This is regular Linux CentOS 4.2 with SAN storage (boot from SAN) as disks. So this is EXT3 on LVM. BUT it is VERY interesting that than happens only to two users which are connected to the server via slow links (reading via Thunderbird or Squirrelmail). It never happened (now for weeks) to other 10 users which use it localy or at home (on speedy links). It's very hard for me to exactly pinpoint the problem, since it never happens to me. But when it happened to one user again I asked him to send me screenshoot of it. I could see there that SquirrelMail said: "Warning: fgets() [function fgets]: SSL: fatal protocol error in /usr/share/squirrelmail/functions/imap_general.php on line 93." Examining this file this line is in function: --------SQUIRRELMAIL PHP SOURCE------------ /** * Custom fgets function: gets a line from the IMAP server, * no matter how big it may be. * @param stream imap_stream the stream to read from * @return string a line */ function sqimap_fgets($imap_stream) { $read = ''; $buffer = 4096; $results = ''; $offset = 0; while (strpos($results, "\r\n", $offset) === false) { if (!($read = fgets($imap_stream, $buffer))) {<- THIS IS LINE 93 /* this happens in case of an error */ /* reset $results because it's useless */ $results = false; break; } if ( $results != '' ) { $offset = strlen($results) - 1; } $results .= $read; } return $results; } } ------------------------------------------- Looks like dovecot drops connection or something. Well must be related to corrupt dovecot files in particular folder, since deleting them solves the problem. BR, Alen Salamun

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[Dovecot] New Fedora/Sendmail Install Assistance
by Cliff Hayes 02 Nov '05

02 Nov '05

Hello everyone, I've narrowed down my problem, so this should be an easy one for some smart person out there. I am moving from an old sendmail/Fedora 2 box to a new sendmail/Fedora 4 box and want to try Dovecot for pop3. The problem is, I can't get it to work. I have 9000 email accounts I will be moving to the new box. I've already tried and failed once. The problem is, Dovecot wants a home directory for each one. We don't use home directories. So, when I try to pop one of the accounts that was moved over, /var/log/maillog shows: Nov 1 14:33:47 sendmail pop3(chayes): mkdir_parents(/home/chayes/mail/.imap/INBOX) failed: Permission denied Nov 1 14:33:47 sendmail pop3(chayes): Couldn't open INBOX: Internal error occured. Refer to server log for more information. [2005-11-01 14:33:47] -or- Nov 1 14:29:18 sendmail pop3(chayes): mbox: Can't create root IMAP folder /home/chayes/mail: Permission denied Nov 1 14:29:18 sendmail pop3(chayes): Failed to create storage with data: mbox:/var/spool/mail/chayes ******** But if I create folders /home/chayes/ and /home/chayes/mail with user and group set to chayes, then it works. By the way, I've tried about 20 different iterations of the default_mail_env parameter. This is the one I'm using at the moment: default_mail_env = mbox:/var/spool/mail/%u Bottom line is, if Dovecot has to have a home directory, then I guess I'll have to go back to pop3d, which doesn't. Thanks, Cliff

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