- dovecot - dovecot.org

[Dovecot] Calling dovecot-lda correctly from exim for virtual user setup
by Frerich Raabe 20 Aug '13

20 Aug '13

Hi, I'm running Dovecot 2.1.7 on Debian. Exim is the MTA. I was recently made aware of the fact that the way in which Exim invokes dovecot-lda is prone to code injection: dovecot_virtual_delivery: driver = pipe command = HOME=/home/vmail/\$local_part /usr/lib/dovecot/dovecot-lda -f \$sender_address use_shell .. I.e. a command is executed via the shell, and Exim uses non-sanitized user input (mail header fields) to construct the command. Now, the reason I invoked dovecot like that is to pass a plausible value for the HOME environment variable, so that dovecot-lda can determine where the Maildir directory of the recipient is. Is there any way to achieve this without requiring HOME to be set correctly? I looked at the -m switch but as far as I can see that merely defines the destination mailbox, but not the path to the Maildir directory, correct? -- Frerich Raabe - raabe(a)froglogic.com www.froglogic.com - Multi-Platform GUI Testing

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Re: [Dovecot] Dovecot + SELinux permission problems
by Thomas Harold 20 Aug '13

20 Aug '13

On 6/24/2013 9:58 AM, Johnny wrote: > Yes, /var/log/audit/ with audit.log. There are some archived logs as > well, but no recent messages regarding dovecot perms. Typically you could use "sealert -a /var/log/audit/audit.log /var/log/audit/audit.log.1" to get a feel for how many SELinux exceptions are happening. Also, when you say that the restorecon -R did not fix the issue, did you check the output of "ls -Z" after running it? However, looking at your original message, I'm wondering why the forward slashes are doubled up. For instance: "/home/user/data1/Maildir//"

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[Dovecot] Disagreement on where mail goes.
by LuKreme 19 Aug '13

19 Aug '13

My virtual users have their mail stored in /usr/local/virtual/user(a)example.com/ dovecot wants to read the mail from /usr/local/virtual/user(a)example.com/Maildir which is causing problems since all new mail is being written in /usr/local/virtual/user(a)example.com/new and dovecot is looking in /usr/local/virtual/user(a)example.com/Maildir/new For the local users, /home/user/Maildir is the right directory. for right now I've had to kludge a script that moves mail from /usr/local/virtual/user(a)example.com/new to /usr/local/virtual/user(a)example.com/Maildir/new every two minutes. -- First we must assume a spherical cow.

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[Dovecot] Maildirmake equiv?
by LuKreme 19 Aug '13

19 Aug '13

Since I am using dovecot I do not have courier installed, but Courier had a very handy tool for making maildir folders called `maildirmake` which I used in some automated backup scripts. How do I duplicate maildirmake in dovecot? for example: #!/bin/bash # v1.2a Testing for new dovecot install # Archive mail from folders without [0-9]{4} Maildirs # after they are 21 days old to a yearly folder MDIR="$HOME/Maildir" MDM="/usr/local/bin/maildirmake" YEAR=`/usr/local/bin/gdate -d "last month" '+%Y'` echo "The Year is $YEAR..." OIFS=$IFS IFS=" " for I in `find $MDIR -maxdepth 1 -mindepth 1 -type d| egrep -v "[0-9][0-9][0-9][0-9]"`; do MYDIR="${I}" TBASE=`basename $MYDIR` # if [ ! $TBASE == "Maildir" ]; then TDIR=`dirname $MYDIR` TARGET="${TDIR}/.zz${TBASE}.${YEAR}" # echo "$MYDIR $TARGET" if [ -d "$MYDIR/cur" ]; then echo -n "Processing ${MYDIR} => ${TARGET}..." if [ ! -d "${TARGET}" ]; then echo "" echo -n "WARNING ${TARGET} does not exist. invoking $MDM ${TARGET}..." $MDM "${TARGET}" fi if [ -d "${TARGET}" ]; then # echo "$TARGET does exist, moving files" find ${MYDIR}/cur -type f -ctime +21 -exec mv {} ${TARGET}/cur/ \; echo "done." else echo "$TARGET does not exist" fi fi # fi done IFS=$OIFS -- Forever was over. All the sands had fallen. The great race between entropy and energy had been run, and the favourite had been the winner after all. Perhaps he ought to sharpen the blade again? No. Not much point, really.

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[Dovecot] dovecot is working, sort of
by LuKreme 19 Aug '13

19 Aug '13

I have dovecot setup and authenticating away for local users, but when I try to add MySQL users from postfix admin, not only does that fail, but all authentication fails. This configuration does not work: doveconf -n # 2.2.5: /usr/local/etc/dovecot/dovecot.conf # OS: FreeBSD 9.1-RELEASE i386 namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = passwd } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } and I get the following errors for *ALL* attempts to connect, not just sql ones: mail dovecot: imap-login: Error: Timeout waiting for handshake from auth server. my pid=10591, input bytes=0 Aug 14 22:56:36 mail dovecot: imap-login: Error: Timeout waiting for handshake from auth server. my pid=10592, input bytes=0 mail dovecot: auth: Fatal: mysql: Missing value in connect string: password-dovecot mail dovecot: master: Error: service(auth): command startup failed, throttling for 60 secs mail dovecot: imap-login: Disconnected: Auth process broken (disconnected before auth was ready, waited 1 secs): user=<>, rip=67.176.106.217, lip=75.148.117.91, TLS, session=<U82VTPXjvQBDsGrZ> This configuration works, but only for local users obviously: # 2.2.5: /usr/local/etc/dovecot/dovecot.conf # OS: FreeBSD 9.1-RELEASE i386 namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = passed } The dovecot-sql.conf.ext file is: $ cat /etc/dovecot/dovecot-sql.conf.ext driver = mysql connect = host=localhost dbname=postfix user=dovecot password-dovecot default_pass_scheme = CRYPT password_query = select password from mailbox where username ='%u' user_query = select concat('/usr/local/virtual/', maildir) from mailbox where username = '%u; #iterate_query = SELECT username AS user FROM users Both to the password_query and user_query lines return the right results when I do them manually in MySQL. The one thing I am very unsure of is the default_pass_scheme (the postfixdb is a postfixadmin db), but even if that were completely wrong, it seems like the local users should still be able to authenticate even if the MySQL ones cannot? -- And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does.

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[Dovecot] Proxy: %$ should contain username
by Reindl Harald 17 Aug '13

17 Aug '13

for nomal operations * login_log_format_elements = %r %m %k * login_log_format = %$: %s would be perfect because "proxy(h.reindl(a)thelounge.net)" contains the username *but* in case of auth errors "Disconnected (auth failed, 1 attempts in 2 secs)" does not show the username - hence currently there exists no way to avoid username double-logging in normal operations without render the log unusebale in case auf dictionary attacks / authentication failers another option would be make %$ obsolete because i do not need to see "proxy(h.reindl(a)thelounge.net): started proxying to 127.0.0.1:143" because i know that *but* in case of auth errors "%s" doe snot contain any hint of a error and would show "user=<h.reindl(a)thelounge.net>, 10.0.0.241, CRAM-MD5, TLS" even with a wrong password and nothing else that is not really optimal, in case of "tail -f" someone does not want redundant informations leading to linebreaks as well it wastes disk space Aug 17 13:17:04 mail dovecot: imap-login: proxy(h.reindl(a)thelounge.net): started proxying to 127.0.0.1:143: user=<h.reindl(a)thelounge.net>, 10.0.0.241, CRAM-MD5, TLS ____________________________________________________________________________________________________________ login_log_format_elements = %r %m %k login_log_format = %$: %s Aug 17 14:31:25 testserver dovecot: imap-login: Disconnected (auth failed, 1 attempts in 2 secs): 84.113.45.81, PLAIN ____________________________________________________________________________________________________________ login_log_format_elements = user=<%u> %r %m %c login_log_format = %$: %s Aug 17 14:29:05 mail dovecot: imap-login: Disconnected (auth failed, 1 attempts in 0 secs): user=<h.reindl(a)thelounge.net>, 10.0.0.6, PLAIN ____________________________________________________________________________________________________________

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[Dovecot] MailLocation
by LuKreme 17 Aug '13

17 Aug '13

In reading http://wiki2.dovecot.org/MailLocation it is not clear to me the syntax for setting mail_location inside a userdb block. --

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[Dovecot] OS X
by Jonathan Kenyon 17 Aug '13

17 Aug '13

Hi I have updated a 10.6.8 to 10.8.4 and it transferred the dovecot mail. All except one sent folder. This folder was a sent mail box and the CUR folder is in the correct place and i have deleted the index files but it still is not showing up in a mail app. Can someone suggest a way to re catalogue it. many thanks jonny

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[Dovecot] Any way to test a master user's password?
by Axel Luttgens 16 Aug '13

16 Aug '13

Hello, Is there any way to easily check a master user's password, for itself, without having to refer to another user or to weak the security by allowing master users to log in for themselves? For example, this works: # doveadm auth test 'someuser*masteruser' Password: <enter master user's password here> passdb: someuser*masteruser auth succeeded but depends on the existence of another user, and is thus contingent and unnecessarily heavy. TIA, Axel

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[Dovecot] rdiff-backup of Maildir?
by Thomas Harold 16 Aug '13

16 Aug '13

What's the best way to do long-term backups of the Maildir format these days? Traditionally we've just done a rdiff-backup or pointed Bacula at the Maildir. Both give us the option to reset a particular mailbox back to a previous day (any day within the last N months). Do we just need to snapshot the LVM volume that holds all the Maildir boxes, or is there some additional commands that we should run before doing the LVM snapshot?

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