February 2013 - dovecot

[Dovecot] proxy imaps
by Antonio Casado Rodriguez 16 Feb '13

16 Feb '13

Hi all, I had a imaps dovecot server working normal. I wanted to isolate the Internet connection by placing a proxy imap(Intranet connections still connect directly to the imap server). Yesterday I set up oneproxy imaps dovecot and thereafter, imap dovecot logs on errors: imap-login: Error: OpenSSL malloc() failed. You may need to increase login_process_size Need dovecot more memory with imap proxy connections than direct connections? Regards -- Antonio Casado Rodríguez Administrador de Servicios de Red y Seguridad TIC Área de Comunicaciones STIC (Servicio de las Tecnologías de la Información y las Comunicaciones) UNIVERSIDAD DE ALMERÍA Este mensaje y los ficheros que puedan ser adjuntados son confidenciales. Los mismos contienen información reservada que no puede ser difundida. Si usted ha recibido este correo por error, tenga la amabilidad de eliminarlo de su sistema y avisar al remitente mediante reenvío a su dirección electrónica; no deberá copiar el mensaje ni divulgar su contenido a ninguna persona. Su dirección de correo electrónico junto a sus datos personales constan en un fichero titularidad de La UNIVERSIDAD DE ALMERÍA cuya finalidad es la de mantener el contacto con usted. Si quiere saber de qué información disponemos de usted, modificarla, y en su caso, cancelarla, puede hacerlo enviando un escrito al efecto, acompañado de una fotocopia de su D.N.I. a la siguiente dirección: UNIVERSIDAD DE ALMERÍA –. Secretaría General de La Universidad de Almería. Edificio Central, Planta baja. Ctra. Sacramento s/n, La Cañada de San Urbano. CP 04120 Almería

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[Dovecot] Segfault with doveadm-server
by Evgeny Basov 16 Feb '13

16 Feb '13

Hello. With dovecot ver. from 20130211 I have a segfault on doveadm when sync. There are messages from server: 2013-02-14T12:42:35.508031+04:00 imap1 kernel: [870542.927083] doveadm-server[9483]: segfault at 4 ip 00000074b228bc24 sp 000003f30b8e61b0 error 4 in doveadm-server[74b226b000+3a000] or 2013-02-14T12:47:39.850942+04:00 imap1 kernel: [870847.279513] doveadm[9513]: segfault at 4 ip 00000006b31ac294 sp 000003dc5c669a90 error 4 in doveadm[6b3178000+5f000] I cannot catch process doveadm-server by strace because it starts with unknown PID on demand.

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[Dovecot] dovecot-2.2: dsync to imapc not working
by Evgeny Basov 16 Feb '13

16 Feb '13

Hello. I have dovecot installation # dovecot --version 20130205 (03a0af22100d+) built with imapc backend. I'm tried to sync mailboxes from another server after clean mail directory localy: # dsync -v -o imapc_user="user(a)example.org" -o imapc_password="pass" -o imapc_host=imap.example.org -o imapc_features=rfc822.size -o mailbox_list_index=no backup -R -f -u "user(a)example.org" imapc: and get this message dsync(user(a)example.org): Error: Exporting mailbox INBOX failed: Backend doesn't support GUIDs, sync with header hashes instead Repeated command returns this one message: dsync(user(a)example.org): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted. What wrong with this build? Maybe there is another way to do it? For example create backup in local temporary directory and synchronize this one and working storage.

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[Dovecot] accumulating orphaned processes
by Jeff Gustafson 16 Feb '13

16 Feb '13

I'm getting orphaned processes on our mail servers. Some machines has processes hanging around from a week ago. I'm running the current stable of dovecot 2.1.15, but the problem has been happening for a while now. I thought it would be good to report the issue. I ran an strace on one of them and this is the output: Process 21370 attached - interrupt to quit open("/var/run/dovecot/stats-mail", O_WRONLY) = 7 write(7, "DISCONNECT\ta09ade0350d81d517a530"..., 44) = 44 munmap(0x7f1ad8a8d000, 266240) = 0 close(13) = 0 close(12) = 0 epoll_ctl(9, EPOLL_CTL_DEL, 11, {0, {u32=17384128, u64=17384128}}) = 0 close(11) = 0 close(7) = 0 munmap(0x7f1ada5d6000, 2106272) = 0 munmap(0x7f1ada7d9000, 2161360) = 0 munmap(0x7f1ada3cf000, 2124136) = 0 munmap(0x323c800000, 2162768) = 0 munmap(0x7f1ad9fc8000, 2102976) = 0 munmap(0x7f1ada1ca000, 2114728) = 0 epoll_ctl(9, EPOLL_CTL_DEL, 4, {0, {u32=17319120, u64=17319120}}) = 0 close(4) = 0 close(8) = 0 close(9) = 0 exit_group(0) = ? Process 21370 detached As you can see, the process exited at that point. Any ideas? ...Jeff

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[Dovecot] Requested xxxx scheme, but we have a NULL password after upgrade
by PhilQ 15 Feb '13

15 Feb '13

I'm having an issue I can't seem to work around after upgrading from Dovecot 1.0.7 to 1.2.17. After getting Dovecot 1.07 working on CentOS 5.9, I decided that it might be wise to upgrade to a later version, so I stuck with 1.x and went with 1.2.17, which I had to compile from source. CentOS was originally using /etc as the starting path for Dovecot files but the source distribution puts most of the stuff under /usr/local/etc. After the usual config>make>make install dance I made the necessary changes to point to the new libraries, modules, etc. and the "imap-login: Fatal: Dovecot version mismatch: Master is v1.2.17, login is v1.0.7...." messages went away. After doing this though I cannot login, I get the following error messages: Feb 13 15:50:40 auth(default): Info: client in: AUTH 7 NTLM service=imap lip=192.168.2.102 rip=192.168.2.100 lport=143 rport=1470 Feb 13 15:50:40 auth(default): Info: client out: CONT 7 Feb 13 15:50:40 auth(default): Info: client in: CONT 7 TlRMTVNTUAABAAAAB4IIogAAAAAAAAAAAAAAAAAAAAAFASgKAAAADw== Feb 13 15:50:40 auth(default): Info: client out: CONT 7 TlRMTVNTUAACAAAAMAAwADAAAAAFAooATj7XW6ve2hwAAAAAAAAAADgAOABgAAAAUwBlAHIAdgBlAHIAMQAuAGgAZQByAHMAYwBoAGwAYQB1AHIAZQBuAC4AYwBvAG0AAwAwAFMAZQByAHYAZQByADEALgBoAGUAcgBzAGMAaABsAGEAdQByAGUAbgAuAGMAbwBtAAAAAAA= Feb 13 15:50:40 auth(default): Info: client in: CONT 7 TlRMTVNTUAADAAAAGAAYAGoAAABoAGgAggAAAAAAAABIAAAAEAAQAEgAAAASABIAWAAAAAAAAADqAAAABQKIAgUBKAoAAAAP*CENSORED*bgBiAFEAUwBFAC0AVwBJAE4AWABQAEXO6p/WuopqQ02x1kzJGW3NoQELKw32N88JqkbMOYOVErhiS492elwBAQAAAAAAA*CENSORED*ysN9jcAAAAAAwAwAFMAZQByAHYAZQByADEALgBoAGUAcgBzAGMAaABsAGEAdQByAGUAbgAuAGMAbwBtAAAAAAAAAAAA Feb 13 15:50:40 auth(default): Info: cache(pquesinb,192.168.2.100): miss Feb 13 15:50:40 auth(default): Info: passwd-file(pquesinb,192.168.2.100): lookup: user=pquesinb file=/etc/dovecot.users Feb 13 15:50:40 auth(default): Info: password(pquesinb,192.168.2.100): Requested NTLM scheme, but we have a NULL password Feb 13 15:50:40 auth(default): Info: cache(pquesinb,192.168.2.100): miss Feb 13 15:50:40 auth(default): Info: password(pquesinb,192.168.2.100): passdb doesn't support credential lookups Feb 13 15:50:40 auth(default): Info: cache(pquesinb,192.168.2.100): miss Feb 13 15:50:40 auth(default): Info: password(pquesinb,192.168.2.100): passdb doesn't support credential lookups Feb 13 15:50:40 auth(default): Info: cache(pquesinb,192.168.2.100): miss Feb 13 15:50:40 auth(default): Info: password(pquesinb,192.168.2.100): passdb doesn't support credential lookups Feb 13 15:50:40 auth(default): Info: cache(pquesinb,192.168.2.100): miss Feb 13 15:50:40 auth(default): Info: password(pquesinb,192.168.2.100): passdb doesn't support credential lookups Feb 13 15:50:42 auth(default): Info: client out: FAIL 7 user=pquesinb Looking at the log from the old version while it was working, I was getting messages like the following: dovecot: Feb 04 14:14:21 Info: imap-login: Login: user=<pquesinb>, method=NTLM, rip=192.168.2.100, lip=192.168.2.102 dovecot: Feb 04 14:14:21 Info: imap-login: Login: user=<pquesinb>, method=NTLM, rip=192.168.2.100, lip=192.168.2.102 dovecot: Feb 04 14:15:03 Info: IMAP(pquesinb): Disconnected: Logged out dovecot: Feb 04 14:15:03 Info: IMAP(pquesinb): Disconnected: Logged out dovecot: Feb 04 14:15:23 Info: imap-login: Login: user=<pquesinb>, method=NTLM, rip=192.168.2.100, lip=192.168.2.102 dovecot: Feb 04 14:15:23 Info: imap-login: Login: user=<pquesinb>, method=NTLM, rip=192.168.2.100, lip=192.168.2.102 dovecot: Feb 04 14:16:05 Info: IMAP(pquesinb): Disconnected: Logged out dovecot: Feb 04 14:16:05 Info: IMAP(pquesinb): Disconnected: Logged out /etc/dovecot.users contains a list of usernames. Is this error the result of additional security which has been incorporated into the later version of Dovecot, or is it because my installation of the later version from source is broken, somehow incompatible, etc? Dovecot was configured to use PAM and it appeared to know the password of my account, failing when it was entered incorrectly so I'm assuming that it was successfully using PAM. I kept the same syntax in the later config file. >From dovecot.conf: passdb pam { # [session=yes] [setcred=yes] [failure_show_msg=yes] [max_requests=<n>] # [cache_key=<key>] [<service name>] # # session=yes makes Dovecot open and immediately close PAM session. Some # PAM plugins need this to work, such as pam_mkhomedir. # # setcred=yes makes Dovecot establish PAM credentials if some PAM plugins # need that. They aren't ever deleted though, so this isn't enabled by # default. # # max_requests specifies how many PAM lookups to do in one process before # recreating the process. The default is 100, because many PAM plugins # leak memory. # # cache_key can be used to enable authentication caching for PAM # (auth_cache_size also needs to be set). It isn't enabled by default # because PAM modules can do all kinds of checks besides checking password, # such as checking IP address. Dovecot can't know about these checks # without some help. cache_key is simply a list of variables (see # doc/wiki/Variables.txt) which must match for the cached data to be used. # Here are some examples: # %u - Username must match. Probably sufficient for most uses. # %u%r - Username and remote IP address must match. # %u%s - Username and service (ie. IMAP, POP3) must match. # # The service name can contain variables, for example %Ls expands to # pop3 or imap. # # Some examples: # args = session=yes %Ls args = cache_key=%u dovecot #args = dovecot } If anyone could give me some ideas on where to go from here, I'd really appreciate it. If there's little chance of getting the newer version to work with CentOS 5 then I'm ready to just drop back to the older version. Thanks a bunch. - Phil Config info follows: [root@Server1 lda]# dovecot -n # 1.2.17: /usr/local/etc/dovecot.conf # OS: Linux 2.6.18-348.el5.centos.plusxen x86_64 CentOS release 5.9 (Final) log_path: /var/log/dovecot.log info_log_path: /var/log/dovecot.log protocols: imap imaps pop3 pop3s ssl_cert_file: /etc/pki/dovecot/certs/dovecot.pem ssl_key_file: /etc/pki/dovecot/private/dovecot.pem disable_plaintext_auth: no login_dir: /usr/local/var/run/dovecot/login login_executable(default): /usr/local/libexec/dovecot/imap-login login_executable(imap): /usr/local/libexec/dovecot/imap-login login_executable(pop3): /usr/local/libexec/dovecot/pop3-login max_mail_processes: 64 mail_location: maildir:~/Maildir maildir_very_dirty_syncs: yes mail_executable(default): /usr/local/libexec/dovecot/imap mail_executable(imap): /usr/local/libexec/dovecot/imap mail_executable(pop3): /usr/local/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/local/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3 mail_log_max_lines_per_sec: 100 imap_client_workarounds(default): outlook-idle imap_client_workarounds(imap): outlook-idle imap_client_workarounds(pop3): lda: mail_plugin_dir: /usr/local/lib/dovecot/lda auth default: mechanisms: ntlm plain login digest-md5 cache_size: 16 cache_ttl: 90 verbose: yes debug: yes debug_passwords: yes passdb: driver: passwd-file args: /etc/dovecot.users passdb: driver: pam args: cache_key=%u dovecot passdb: driver: passwd passdb: driver: shadow userdb: driver: passwd -- View this message in context: http://dovecot.2317879.n4.nabble.com/Requested-xxxx-scheme-but-we-have-a-NU… Sent from the Dovecot mailing list archive at Nabble.com.

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Re: [Dovecot] Authentication with many Windows AD
by Antonio Alberola 14 Feb '13

14 Feb '13

Hi, > You can set as many databases as you want. Check this: > > http://wiki2.dovecot.org/PasswordDatabase > http://wiki2.dovecot.org/Authentication/MultipleDatabases This solution is valid if I have only one domain. In case you have more than one domain, you need authenticate in the appropriate LDAP server. Is That correct? I'm going to explain my particular case. I have five Windows domains with some users who belong to those domains. I also have other users who are authenticated with local UNIX accounts. The only thing that I can do (I think) is using a Radius server. But, I'd rather not use it.

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Re: [Dovecot] Imap process crash: assertion failed: (full_fs_access)
by Joseph Tam 14 Feb '13

14 Feb '13

On Wed, 13 Feb 2013, dovecot-request(a)dovecot.org wrote: Timo Sirainen <tss(a)iki.fi> writes: >>>> Any guess at what would cause this? >>>>> Feb 7 21:20:53 server dovecot: imap(user): Panic: file >>>> mailbox-list-fs-iter.c: line 447 (fs_list_get_roots): assertion >>>> failed: (full_fs_access) >>> LIST command that had invalid parameters that somehow got through the >>> first validity check. What namespace config do you have? >> >> namespace { >> alias_for = >> hidden = yes >> list = no >> location = >> prefix = / >> separator = / >> } > > This one causes these crashes. Fixed in v2.2 now: http://hg.dovecot.org/dovecot-2.2/rev/fb367a977077 Thanks for diagnosing this. I'll probably remove this namespace or limp along until 2.2 becomes the latest stable release. I added this namespace alias in an abundance of caution: this was to prevent users from trying to peruse the entire file space e.g. /etc. A poor man's chroot. I didn't test this thoroughly to see if it actually did what it was supposed to. Joseph Tam <jtam.home(a)gmail.com>

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[Dovecot] Authentication with many Windows AD
by Antonio Alberola 14 Feb '13

14 Feb '13

Dear All, I'm a new user of Dovecot and I need support with the authentication process. I use Dovecot 2.0.9 and Postfix 2.6.6 on host x86_64-redhat-linux-gnu 2.6.32-279.14.1.el6.x86_64 CentOS release 6.3 (Final) I need to select the validation method depending on the user. I have users that have to be authenticate with UNIX account, and I have others thats have to be authenticate with Windows AD. For example, some sysadmins and special accounts needs validate with Unix accounts. Other normal users have to authenticate with Windows AD, I have many Windows controllers. Some users authenticate to a specific Windows AD and other users are validated in another one. How I can do this? Thank you very much. Antonio Alberola

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[Dovecot] FreeBSD, Dovecot and ZFS
by Jason Lock 13 Feb '13

13 Feb '13

Mail Issues - FreeBSD Hello, my apologies if this may be the wrong forum but hoping that maybe someone might be able to provide some insight. Have a very sporadic and strange issue with our mail servers running Dovecot on FreeBSD. There are three servers hosting Dovecot with FreeBSD as the underlying operating system. All three connect to a NAS server, again running FreeBSD and ZFS. When the specific issue occurs, clients connecting to check mail via POP3 or IMAP experience long delays and timeouts. To the point where POP3 Logins fail due to the timeouts. The issue is further compounded by clients increasing the number of attempts to check mail. Part of the frustration in attempting to diagnose the issue is not knowing the root cause or symptom that initates the issue. Wondering if anyone has experienced anything similar, or suggestions on ways to help identify the root cause

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[Dovecot] dovecot-uidlist crashing and re retriving messages by pop3 clients
by Piotr Rotter 13 Feb '13

13 Feb '13

Hello, I have issue with dovecot (v. 2.1.13)configuration after implementation dovecot-lda (I used maildrop earlier). Now i have 9 servers with storage by NFS v3. My problem is frequently dovecot-uidlist crashing. 2013-02-13T13:34:02.447969+01:00 k1 dovecot: imap(user(a)domain.com): Error: Broken file /path_to_mailbox/dovecot-uidlist line 3170: Invalid data: 2013-02-13T13:34:34.527715+01:00 k1 dovecot: pop3(user(a)domain.com): Error: Broken file /path_to_mailbox/dovecot-uidlist line 367: Invalid data: It happens few time in minute for diferent users and has effect to re retriving messages by pop3 clients. This my NFS mount options: (rw,tcp,vers=3,actimeo=0) 10-mail.conf options: mmap_disable = yes dotlock_use_excl = yes mail_fsync=always mail_nfs_storage = yes mail_nfs_index = yes lock_method = dotlock I do not know what I did wrong and how solve this issue. Maybe NFS v4 or fcntl locks or migration to pop3_uidl_format = %g will by solution. Please some hint. Please any help for solve this issue and sorry my english.

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