March 2015 - dovecot - dovecot.org

check if anvil is working
by Leonardo Rodrigues 19 Mar '15

19 Mar '15

Hi, Is there any way of making sure the anvil service, used to penalty login fails, is working ? I dont see anything on the logs regarding it neither have it configured. It's not on my configuration files, but it can be seen on a 'dovecot -a' dump. Should it be logging something ? Should i have enabled it somehow ? Thanks for the answers. [root@correio log]# dovecot --version 2.2.13 (from dovecot -a dump) service anvil { chroot = empty client_limit = 0 drop_priv_before_exec = no executable = anvil extra_groups = group = idle_kill = 4294967295 secs privileged_group = process_limit = 1 process_min_avail = 1 protocol = service_count = 0 type = anvil unix_listener anvil-auth-penalty { group = mode = 0600 user = } unix_listener anvil { group = mode = 0600 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } -- Atenciosamente / Sincerily, Leonardo Rodrigues Solutti Tecnologia http://www.solutti.com.br Minha armadilha de SPAM, NÃO mandem email gertrudes(a)solutti.com.br My SPAMTRAP, do not email it

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fast doveadm search results
by Vu Ngoc VU 19 Mar '15

19 Mar '15

hello, I've posted same question here months ago. But obtaine no answer, even not a "you question is stupid". So I don't know what to think about that. My goal is to be able to find mails quickly with "doveadm search". We are using dovecot in a corporate. And some managers, sometimes ask to delete some messages. These messages are "unwanted" ones: mistakenly sent, defamatory... So, that situations appear rarely, but when asked, they expected me to deleted quickly these messages from few to thousands of users mailboxes. Is that possible to change behaviour of Dovecot, some headers like sender, message-id, date are stored in cache for at least 48h? (7 days would be better). I've read this page : http://wiki2.dovecot.org/Design/Indexes/Cache but cannot understand every parts. "A specific decision can be forced by ORing it with MAIL_CACHE_DECISION_FORCED." Is OR in this sentence like AND/OR comparators? Where to put "MAIL_CACHE_DECISION_FORCED"? "mail-cache-decisions.c file contains the rules how Dovecot changes the decisions." <-- is it in this file? My setup is 2.2.9 on Ubuntu 14.04 running on OpenVZ containers with 2 Director and 2 imap/pop3 backends. The storage is shared via NFS. Is this the performance problem? If dovecot has metadata I want in its cache, I cannot see how this is a problem. Can these settings be useful for my case? mail_always_cache_fields = mail_cache_fields = flags mail_cache_min_mail_count = 0 mail_never_cache_fields = imap.envelope Thanks.

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Support for multiple passwords?
by Conrad Kostecki 18 Mar '15

18 Mar '15

Hi! Currently, the passwords are stored in plaintext for my dovecot, as I am still using cram-md5 AND digest-md5. I have still to offer that, as I have some deprecated clients, therefore, I am unable to hash at least those passwords for that accounts. I've found on the Wiki: > In future it's possible that Dovecot could support multiple passwords > in different schemes for a single user. Is there any news about this? Are there still any plans to support this maybe in future? For my understanding, that would solve my problem, that I could define a password in both schemes (cram and digest) and don't have to use plaintext password? Cheers Conrad

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passwd file for quota
by Cliff Hayes 18 Mar '15

18 Mar '15

I need to implement quota. I read as much as I could including http://wiki2.dovecot.org/HowTo/SimpleVirtualInstall But my current /etc/passwd file does not have the password in it as shown in dovecot docs ... there is an x where the password should be. I created a program that creates a passwd file in the proper format with the proper extra quota fields for all users (except it has an x where the password should be). I plan to store it in /etc/dovecot How do I get dovecot to stop looking at /etc/passwd and start looking at /etc/dovecot/passwd? And hopefully that will not affect how it gets the password (pam) because when users change their password from webmail of course dovecot will need to be looking in the same place. # dovecot -n output # 2.0.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-431.29.2.el6.x86_64 x86_64 Scientific Linux release 6.5 (Carbon) auth_failure_delay = 5 secs auth_username_format = %Ln auth_verbose_passwords = plain first_valid_uid = 9 mail_access_groups = mail mail_location = maildir:~/Maildir managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date mbox_write_locks = fcntl passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_after = /dovecotSieveAfter/ sieve_dir = ~/sieve } protocols = imap lmtp sieve service managesieve-login { inet_listener sieve { port = 4190 } } ssl_ca = </etc/pki/dovecot/certs/intermediate20150202.crt ssl_cert = </etc/pki/dovecot/certs/avalon20150202.crt ssl_key = </etc/pki/dovecot/private/avalon20150129.key ssl_verify_client_cert = yes userdb { driver = passwd } protocol lmtp { log_path = /var/log/dovecot-lmtp.log mail_plugins = " sieve" } protocol lda { log_path = /var/log/dovecot-lda.log mail_plugins = " sieve" }

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Roundcubemail problem with Dovecot
by Robert Moskowitz 18 Mar '15

18 Mar '15

I am getting "Connection to storage server failed." in roundcubemail. On doing a google search If find: http://help.directadmin.com/item.php?id=473 Which puts the problem at dovecot. I did get a dovecot update back on 3-5 and that would match to my one roundcube mail user complaining and the delays I am seeing with thunderbird and outlook users. So with my setup, I am trying to figure what are the index files to delete. Say for myself, I am seeing: /home/vmail/htt-consult.com/rgm/dovecot.index /home/vmail/htt-consult.com/rgm/dovecot.index.cache /home/vmail/htt-consult.com/rgm/dovecot.index.log /home/vmail/htt-consult.com/rgm/.Drafts/dovecot.index /home/vmail/htt-consult.com/rgm/.Drafts/dovecot.index.cache /home/vmail/htt-consult.com/rgm/.Drafts/dovecot.index.log /home/vmail/htt-consult.com/rgm/.Sent/dovecot.index /home/vmail/htt-consult.com/rgm/.Sent/dovecot.index.cache /home/vmail/htt-consult.com/rgm/.Sent/dovecot.index.log /home/vmail/htt-consult.com/rgm/.Spam/dovecot.index /home/vmail/htt-consult.com/rgm/.Spam/dovecot.index.cache /home/vmail/htt-consult.com/rgm/.Spam/dovecot.index.log /home/vmail/htt-consult.com/rgm/.Trash/dovecot.index /home/vmail/htt-consult.com/rgm/.Trash/dovecot.index.cache /home/vmail/htt-consult.com/rgm/.Trash/dovecot.index.log Do I delete all of these? The index.cache files are quite large.

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Re: Dovecot current number of connections being used.
by Joseph Tam 18 Mar '15

18 Mar '15

Jaime Ventura writes: > Is there an easy way to get how many connections are being handled at a > moment? This works: doveadm who -1 2>/dev/null | wc -l If yopu only want to coutn IMAP connections (not POP3), doveadm who -1 2>/dev/null | grep -Fc imap Joseph Tam <jtam.home(a)gmail.com>

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Proxying of non "plain" SASL mechnisms.
by Peter Mogensen 18 Mar '15

18 Mar '15

Hi, I understand from earlier discussions that the reason dovecot doesn't support proxying of other SASL mechanisms than those which supply the plaintext password is that in general it would be possible to proxy any SASL mechanism since it might protect against man-in-the-middle attacks (which would prevent proxying). However, that has led to choice between letting users use PLAIN (or equivalent), or to have the proxy access the target hosts by "master" password. Of course, having the plaintext password the proxy could in principle do other challenge/response SASL handshakes with the target backend, but right now only LOGIN and PLAIN is implemented. So I wondered about the rationale for not just forward the SASL handshake. - First, blindly forwardning will not do, since the mech data has to be decoded anyway to do any per/user passdb lookup (to, say, find the target host). But you don't need authentication to actually succeed to do that. You only need AuthZ-id or AuthN-id. - Secondly, the design of the interaction between imap-login processes and the auth-service in general prevent in general to forward multi-handshake SASL mechanisms, since the authentication must be done before the proxying can be started. But it doesn't prevent forwarding of single handshake SASL mechanisms which use SASL-IR. - Thirdly, while it's correct that some SASL mechanisms protect against man-in-the-middle attacks, that doesn't apply for most single-handshake SASL-IR mechanisms unless they do some kind of channel-binding. (like SASL EXTERNAL) For example, the GS2-KRB5 SASL mech would be perfectly forwarded if just the Kerberos ticket doesn't put restrictions on the client IP-address. So, why not just extend the support for proxy authentication forwarding to any single-handskake SASL-IR mechanism, which doesn't use channel-binding? (which includes PLAIN, but also GS2-KRB5, and possibly others). /Peter

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Dovecot 2.2.15 issues with global ACL
by Ovidiu Moldovan 18 Mar '15

18 Mar '15

Hello, We have upgraded from Dovecot 2.2.13 to 2.2.15 and we are using global ACL file. The content of the ACL file is as following: * owner r INBOX owner lrwstipekxa INBOX/* owner lrwstipekxa user owner rwstipekxa user/* owner rwstipekxa This worked fine but after update any user cannot see any folders from under the INBOX, also they cannot create any new folders. Error into the logs are like this: Debug: acl: Mailbox not in dovecot-acl-list: INBOX Debug: acl: Mailbox not in dovecot-acl-list: INBOX/Chats Debug: acl: Mailbox not in dovecot-acl-list: INBOX/Draft Debug: acl: Mailbox not in dovecot-acl-list: INBOX/INBOX .... I can only see one acl change log at version 2.2.14: http://www.dovecot.org/list/dovecot-news/2014-October/000276.html acl: Global ACL file now supports "quotes" around patterns. But I could not find the reason why the global acl file does not work anymore? Br, Ova

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http://xi.rename-it.nl 2.2.16-1~auto+10/11/12/13: segfault /var/lib/dovecot/auth OR (db_ldap_connect_delayed):
by Denny Fuchs 17 Mar '15

17 Mar '15

hi, I testing around with Kolab with LDAP and have some strange problems, with the auto generated packages for Wheezy. On my first test VM, I have 2:2.2.16~rc1-1~auto+4 installed, and everything works as expected. On a new VM I have 2.2.16-1~auto+13_amd64.deb packages and if I include LDAP backend, I get a segmentation fault on /usr/lib/dovecot/auth: root@kolab:/etc/dovecot/conf.d# /usr/lib/dovecot/auth Segmentation fault with auto+12 and auto+13 If I downgrade to auto+11 or auto+10 I get: Mar 17 14:42:59 kolab dovecot: auth: Panic: file db-ldap.c: line 1228 (db_ldap_connect_delayed): assertion failed: (conn->to == NULL) Mar 17 14:42:59 kolab dovecot: auth: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x7b5ef) [0x7f57d815c5ef] -> /usr/lib/dovecot/libdovecot.so.0(+0x7b64e) [0x7f57d815c64e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f57d810b0d5] -> /usr/lib/dovecot/modules/auth/libauthdb_ldap.so(+0x5455) [0x7f57d70e2455] -> dovecot/auth(userdb_init+0x1a) [0x42765a] -> dovecot/auth(auths_init+0xc9) [0x40d979] -> dovecot/auth(main+0x2b5) [0x40cc85] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f57d7523ead] -> dovecot/auth() [0x40cee9] Mar 17 14:42:59 kolab dovecot: auth: Fatal: master: service(auth): child 1161 killed with signal 6 (core dumps disabled) Mar 17 14:42:59 kolab dovecot: master: Error: service(auth): command startup failed, throttling for 2 secs Mar 17 14:42:59 kolab dovecot: pop3-login: Disconnected: Auth process broken (disconnected before auth was ready, waited 0 secs): user=<>, rip=::1, lip=::1, secured, session=<1QMUJXwRTQAAAAAAAAAAAAAAAAAAAAAB> ii dovecot-sieve 2:2.2.16~rc1-1~auto+4 amd64 secure POP3/IMAP server - Sieve filters support root@kolab:/# ldd /usr/lib/dovecot/modules/auth/libauthdb_ldap.so linux-vdso.so.1 => (0x00007ffc4a1c6000) libldap_r-2.4.so.2 => /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2 (0x00007effe2d1a000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007effe2b12000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007effe2786000) liblber-2.4.so.2 => /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2 (0x00007effe2577000) libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007effe2361000) libsasl2.so.2 => /usr/lib/x86_64-linux-gnu/libsasl2.so.2 (0x00007effe2145000) libgnutls.so.26 => /usr/lib/x86_64-linux-gnu/libgnutls.so.26 (0x00007effe1e85000) libgcrypt.so.11 => /lib/x86_64-linux-gnu/libgcrypt.so.11 (0x00007effe1c06000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007effe19e9000) /lib64/ld-linux-x86-64.so.2 (0x00007effe3180000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007effe17e5000) libtasn1.so.3 => /usr/lib/x86_64-linux-gnu/libtasn1.so.3 (0x00007effe15d3000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007effe13bc000) libp11-kit.so.0 => /usr/lib/x86_64-linux-gnu/libp11-kit.so.0 (0x00007effe11aa000) libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007effe0fa6000) Then I copied from my first VM the libauthdb_ldap.so file on the new test VM to /usr/lib/dovecot/modules/auth/libauthdb_ldap.so (remember: ~rc1-1~auto+4) and the result: root@kolab:/etc/dovecot/conf.d# /usr/lib/dovecot/auth Error: LDAP: binding failed (dn cn=Directory Manager): Invalid credentials and, it works again ... linux-vdso.so.1 => (0x00007fffa00c6000) libldap_r-2.4.so.2 => /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2 (0x00007f94b7ec3000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f94b7cbb000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f94b792f000) liblber-2.4.so.2 => /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2 (0x00007f94b7720000) libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f94b750a000) libsasl2.so.2 => /usr/lib/x86_64-linux-gnu/libsasl2.so.2 (0x00007f94b72ee000) libgnutls.so.26 => /usr/lib/x86_64-linux-gnu/libgnutls.so.26 (0x00007f94b702e000) libgcrypt.so.11 => /lib/x86_64-linux-gnu/libgcrypt.so.11 (0x00007f94b6daf000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f94b6b92000) /lib64/ld-linux-x86-64.so.2 (0x00007f94b8328000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f94b698e000) libtasn1.so.3 => /usr/lib/x86_64-linux-gnu/libtasn1.so.3 (0x00007f94b677c000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f94b6565000) libp11-kit.so.0 => /usr/lib/x86_64-linux-gnu/libp11-kit.so.0 (0x00007f94b6353000) libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f94b614f000) So, it seems, that there is something broken with the autogenerated packages, or with my fresh installed Wheey VM (KVM AMD64) in combination with LDAP. any suggestions? cu denny

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Dovecot current number of connections being used.
by Jaime Ventura 17 Mar '15

17 Mar '15

Hey, Is there an easy way to get how many connections are being handled at a moment? I wanted to have that number over the time and see: - Trends on usage during the day - how close is it from reaching the maximum number of connections. - ... I'm searching for a solution without recurring to something like netstat | grep imap | wc -l. Thanks, Jaime

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