July 2013 - dovecot - dovecot.org

[Dovecot] Wrong remote IP (rip) in mail.log using IMAP login
by tyli 02 Aug '13

02 Aug '13

Dear list users While trying to secure our dovecot server with fail2ban I came across the following problem: We use dovecot (1.2.9, ubuntu package) behind a NAT, and failed login attempts are logged with our firewall as the remote ip. Example: Apr 15 08:36:26 mail dovecot: imap-login: Disconnected (auth failed, 6 attempts): user=<xy>, method=PLAIN, rip=192.168.0.1, lip=192.168.0.3 Therefore I would ban 192.168.0.1 which means that I ban EVERY user. Funny thing is that POP3 login … [View More]

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[Dovecot] Dovecot v2.2.4 (ebbe00999da8) doveadm crash
by e-frog 01 Aug '13

01 Aug '13

Hello, Current Dovecot v2.2 HG crashes using the following command: $ doveadm mailbox status -A -t unseen 'virtual/unread' Please see backtrace below and dovecot -n output attached. Thanks, e-frog gdb /usr/bin/doveadm 24023 GNU gdb (GDB) 7.5.91.20130417-cvs-ubuntu Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to … [View More]the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/bin/doveadm...Reading symbols from /usr/lib/debug/usr/bin/doveadm...done. done. Attaching to program: /usr/bin/doveadm, process 24023 warning: unable to open /proc file '/proc/24023/status' warning: unable to open /proc file '/proc/24023/status' ptrace: No such process. [New LWP 24023] warning: Can't read pathname for load map: Input/output error. [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1". Core was generated by `doveadm mailbox status -A -t unseen virtual/unread'. Program terminated with signal 11, Segmentation fault. #0 i_stream_next_line (stream=0x0) at istream.c:382 382 istream.c: No such file or directory. (gdb) bt full #0 i_stream_next_line (stream=0x0) at istream.c:382 _stream = <optimized out> pos = <optimized out> #1 0xb754656b in auth_master_user_list_next (ctx=0xb91bfbd8) at auth-master.c:689 line = <optimized out> #2 0xb7634a0b in mail_storage_service_all_next (ctx=0xb91c4ba8, username_r=username_r@entry=0xbf8e6630) at mail-storage-service.c:1260 __FUNCTION__ = "mail_storage_service_all_next" #3 0xb7752d46 in doveadm_mail_cmd_get_next_user (ctx=0xb91be478, username_r=0xbf8e6630) at doveadm-mail.c:416 No locals. #4 0xb7753e95 in doveadm_mail_all_users (wildcard_user=0x0, argv=0xb91ba1ec, ctx=0xb91be478) at doveadm-mail.c:368 ret = <optimized out> input = {module = 0x0, service = 0xb77918f3 "doveadm", username = 0xb91bf8a0 "test1(a)local.lan", session_id = 0x0, local_ip = {family = 0, u = { ip6 = {__in6_u = {__u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}, ip4 = { s_addr = 0}}}, remote_ip = {family = 0, u = {ip6 = {__in6_u = {__u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}, ip4 = {s_addr = 0}}}, local_port = 0, remote_port = 0, userdb_fields = 0x0, flags_override_add = (unknown: 0), flags_override_remove = (unknown: 0), no_userdb_lookup = 0} user_idx = 0 user = 0xb91bf8a0 "test1(a)local.lan" error = 0x10 <Address 0x10 out of bounds> #5 doveadm_mail_cmd (argv=0xb91ba1ec, argc=-1189371412, cmd=0xbf8e668c) at doveadm-mail.c:523 ctx = 0xb91be478 getopt_args = <optimized out> ret = <optimized out> c = <optimized out> wildcard_user = 0x0 error = <optimized out> #6 doveadm_mail_try_run (cmd_name=cmd_name@entry=0xb91ba200 "mailbox", argc=5, argc@entry=6, argv=argv@entry=0xb91ba1dc) at doveadm-mail.c:608 cmd = 0xbf8e668c #7 0xb7752903 in main (argc=6, argv=0xb91ba1dc) at doveadm.c:398 cmd_name = 0xb91ba200 "mailbox" i = <optimized out> quick_init = false c = <optimized out> (gdb) [View Less]

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[Dovecot] SSL warning messages
by Anand Kumria 01 Aug '13

01 Aug '13

Hi, I've had the following appear in my logfile, and am just wondering what the warning means? dovecot: managesieve-login: Warning: SSL alert: where=0x4008, ret=256: warning close notify [a.b.c.d] dovecot: imap-login: Warning: SSL alert: where=0x4004, ret=256: warning close notify [w.x.y.z] Should I be worrying about these kinds of messages? Dovecot 2.2.4 on Ubuntu 12.04 LTS if it is important. Thanks, Anand

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Re: [Dovecot] Maildir permissions and Solr re-indexing
by Joseph Tam 01 Aug '13

01 Aug '13

Michael Welsh Duggan writes: > All the files in my Maildir are owned by md5i:mail (I am md5i), and have > 660 permissions. All directories have the same user:group permissions, > and 770 with the setguid bit set. (That last may not be necessary, but > ... > > doveadm(md5i): Error: fchown(/home/md5i/Maildir/.mail.test/dovecot.index.log.newlock, group=8(mail)) failed: Operation not permitted (egid=1000(md5i), group based on /home/md5i/Maildir/.mail.test - see http://wiki2.… [View More]

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[Dovecot] LMTP: userdb lookup - user-filter with variables
by Burckhard Schmidt 31 Jul '13

31 Jul '13

I tried to use dovcots lmtp instead of dovecot-lda. postfix has in master.cf ... dovecot-lda -f ... -d ${user} to separate the user part from user(a)hostname.domain. So lookup of "user" succeeds in userdb (LDAP) done by dovecot-lda. I have always local addresses like to=<user(a)hostname.domain> postfix/lmtp[6579]: [ID 197553 mail.info] B3CDA66A16: to=<h0094slk(a)mailstore4.hu-berlin.de> With lmtp the userpart must be separated also. I tried user_filter (LDAP) with %n, %Ln, %8n … [View More]

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Re: [Dovecot] LDA vs. LMTP
by Joseph Tam 31 Jul '13

31 Jul '13

Martin Burgraf writes: > > I don't know why you would consider a background process inferior to a > > run-on-demand executable. > > Well, the background process is hogging CPU and RAM while it basically > does nothing. "Hogging" CPU and memory is putting it strongly, as it is basically suspended while blocked on waiting for a connection, and if left for a long time in an idle state, might be swapped out to disk and not consuming (real) memory, or consuming real memory … [View More]

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Re: [Dovecot] dovecot-lda not logging if dovecot runs under daemontools
by Jost Krieger 30 Jul '13

30 Jul '13

On Fri Jul 26 14:51:30 2013, Roberto Puzzanghera wrote: > > Hi Jost, thanks for your reply. > > Il 26.07.2013 13:11 Jost Krieger ha scritto: > >Dovecot-lda runs under qmail, so you'll find the output in qmail's > >logs. If you run, say, doveadm manually, the output will be on your > >terminal. > > I didn't explain myself very well. The qmail's log > /var/log/dovecot/current doesn't show the lda output as expected. I That's dovecot's log, not qmail's. … [View More]

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Re: [Dovecot] LDA vs. LMTP
by Martin Burgraf 30 Jul '13

30 Jul '13

Joseph Tam wrote: > I don't know why you would consider a background process inferior to a > run-on-demand executable. Well, the background process is hogging CPU and RAM while it basically does nothing. And when it's running as root there is always the danger of privilege escalation. LDA only runs when it's needed and since it uses only user rights it shoudbe more harmless. bye Martin

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[Dovecot] LDA vs. LMTP
by Martin Burgraf 30 Jul '13

30 Jul '13

Hi there, I'm using Dovecot together with Postfix; as I understand it, there are two ways to transfer the mail from Postfix to Dovecot. 1.) by using LDA with mailbox_command = /usr/libexec/dovecot/dovecot-lda -f "$SENDER" -a "$RECIPIENT" 2.) by using LMTP with mailbox_transport = lmtp:unix:private/dovecot-lmtp (currently using number 1) I'm interessted in the differences and the advantages/disadvantages of each of those solutions. According to http://wiki2.dovecot.org/LDA the recommended way … [View More]

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[Dovecot] Problem switching from Dovecot LDA to LMTP - on dovecot 2.2.4
by Michael Long 29 Jul '13

29 Jul '13

Dovecot LDA has been working fine for me but when I tried to follow the wiki and switch to LMTP I get: Recipient address rejected: User unknown in local recipient table; In postfix/main.cf I went from: mailbox_transport = dovecot-spam to mailbox_transport = lmtp:unix:private/dovecot-lmtp Added this: service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } protocol lmtp { mail_fsync = optimized … [View More]

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