December 2013 - dovecot

[Dovecot] warning from managesieve
by Michael Cramer 12 Dec '13

12 Dec '13

when .dovecot.sieve is a symlink (which it is in my case) a warning is written to the error log file, but it still works. Dec 12 10:02:33 managesieve(tester(a)domain.com): Warning: sieve-storage: Active sieve script symlink /srv/vmail/sieve/domain.com/tester/.dovecot.sieve is broken: invalid/unknown path to storage (points to ingo.sieve). root@i920:/srv/vmail/sieve/domain.com/tester# ll insgesamt 20 drwx------ 3 mail mail 4096 Dez 12 10:03 ./ drwx------ 15 mail mail 4096 Dez 12 10:02 ../ lrwxrwxrwx 1 mail mail 10 Dez 12 10:02 .dovecot.sieve -> ingo.sieve -rw------- 1 mail mail 1575 Dez 12 10:03 .dovecot.svbin -rw------- 1 mail mail 2457 Dez 12 10:02 ingo.sieve drwx------ 2 mail mail 4096 Dez 12 10:02 tmp/

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[Dovecot] Panic: file buffer.c: assertion failed: (used_size <= buf->alloc)
by giom87＠libero.it 12 Dec '13

12 Dec '13

Hi, We have a crash in dovecot 2.2.7 2013-12-11 10:38:44 imap(xxx(a)example.com): Panic: file buffer.c: line 307 (buffer_set_used_size): assertion failed: (used_size <= buf->alloc) 2013-12-11 10:38:44 imap(xxx(a)example.com): Error: Raw backtrace: /opt/dovecot- 2.2.7/lib/dovecot/libdovecot.so.0(+0x672a2) [0x7f576b9742a2] -> /opt/dovecot- 2.2.7/lib/dovecot/libdovecot.so.0(+0x67306) [0x7f576b974306] -> /opt/dovecot- 2.2.7/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f576b92eb4f] -> /opt/dovecot- 2.2.7/lib/dovecot/libdovecot.so.0(+0x62d89) [0x7f576b96fd89] -> /opt/dovecot- 2.2.7/lib/dovecot/libdovecot-storage.so.0(mail_transaction_log_file_open+0x228) [0x7f576bc85488] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot-storage.so.0 (mail_transaction_log_open+0xba) [0x7f576bc8229a] -> /opt/dovecot-2.2.7 /lib/dovecot/libdovecot-storage.so.0(+0x8dc94) [0x7f576bc69c94] -> /opt/dovecot- 2.2.7/lib/dovecot/libdovecot-storage.so.0(mail_index_open+0xf0) [0x7f576bc69ee0] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot-storage.so.0 (index_storage_mailbox_open+0xad) [0x7f576bc5d0dd] -> /opt/dovecot-2.2.7 /lib/dovecot/libdovecot-storage.so.0(+0x4432a) [0x7f576bc2032a] -> /opt/dovecot- 2.2.7/lib/dovecot/libdovecot-storage.so.0(+0x443ff) [0x7f576bc203ff] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot-storage.so.0(+0x564e4) [0x7f576bc324e4] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot-storage.so.0 (mailbox_open+0xf) [0x7f576bc3269f] -> /opt/dovecot-2.2.7 /lib/dovecot/libdovecot-storage.so.0(mailbox_delete+0x1d) [0x7f576bc3287d] -> dovecot/imap(cmd_delete+0xb4) [0x40cc24] -> dovecot/imap(command_exec+0x3d) [0x416d0d] -> dovecot/imap() [0x415e30] -> dovecot/imap() [0x415f1d] -> dovecot/imap(client_handle_input+0x11d) [0x41619d] -> dovecot/imap (client_input+0x6f) [0x41650f] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot.so.0 (io_loop_call_io+0x36) [0x7f576b983b96] -> /opt/dovecot-2.2.7 /lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xa7) [0x7f576b984bf7] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f576b983b08] -> /opt/dovecot-2.2.7/lib/dovecot/libdovecot.so.0 (master_service_run+0x13) [0x7f576b9338f3] -> dovecot/imap(main+0x2a7) [0x41fa27] -> /lib64/libc.so.6(__libc_start_main+0xfd) [0x7f576b598cdd] -> dovecot/imap() [0x40ab79] 2013-12-11 10:38:44 imap(xx(a)example.com): Fatal: master: service(imap): child 6214 killed with signal 6 (core dumped) We use CentOS 6.4: # cat /etc/issue CentOS release 6.4 (Final) The output of dovecot -n: # 2.2.7: /opt/dovecot-2.2.7/etc/dovecot/dovecot.conf # OS: Linux 2.6.32-358.23.2.el6.x86_64 x86_64 CentOS release 6.4 (Final) auth_debug = yes auth_master_user_separator = * auth_username_format = disable_plaintext_auth = no dotlock_use_excl = no first_valid_gid = 101 first_valid_uid = 102 imap_id_send = import_environment = TZ info_log_path = /var/log/dovecot.log log_path = /var/log/dovecot.log log_timestamp = "%Y-%m-%d %H:%M:%S " mail_fsync = always mail_gid = 101 mail_location = maildir:%h/Maildir mail_nfs_index = yes mail_nfs_storage = yes mail_plugins = quota expire fts fts_lucene mail_uid = 102 maildir_broken_filename_sizes = yes 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 ihave mbox_write_locks = fcntl mmap_disable = yes 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 = INBOX. separator = . subscriptions = yes type = private } passdb { args = /opt/dovecot-2.2.7/etc/dovecot/passwd.masterusers driver = passwd-file master = yes } passdb { args = /opt/dovecot-2.2.7/etc/dovecot/dovecot-ldap.conf driver = ldap } passdb { args = /opt/dovecot-2.2.7/etc/dovecot/dovecot-ldap-multiuser.conf driver = ldap master = yes } plugin { fts = lucene fts_lucene = quota = maildir quota_rule2 = INBOX.Trash:storage=+100M } protocols = imap pop3 service anvil { client_limit = 3000 } service auth { client_limit = 4096 unix_listener auth-userdb { mode = 0600 } } service imap-login { inet_listener imap { address = xxx.xxx.xxx.xxx port = 143 } inet_listener imaps { address = xxx.xxx.xxx.xxx port = 993 ssl = yes } process_limit = 2500 process_min_avail = 5 } service imap { drop_priv_before_exec = yes process_limit = 2500 process_min_avail = 5 } service managesieve-login { inet_listener sieve { port = 4190 } process_min_avail = 0 service_count = 1 vsz_limit = 64 M } service managesieve { drop_priv_before_exec = yes process_limit = 1024 } service pop3-login { inet_listener pop3 { address = xxx.xxx.xxx.xxx port = 110 } inet_listener pop3s { address = xxx.xxx.xxx.xxx port = 995 ssl = yes } process_limit = 300 process_min_avail = 5 } service pop3 { drop_priv_before_exec = yes process_limit = 300 process_min_avail = 5 } ssl_cert = </opt/dovecot-2.2.7/certs/imapd.pem ssl_key = </opt/dovecot-2.2.7/certs/imapd.pem userdb { args = /opt/dovecot-2.2.7/etc/dovecot/dovecot-ldap.conf driver = ldap } protocol lmtp { mail_plugins = quota expire fts fts_lucene sieve } protocol lda { mail_plugins = quota expire fts fts_lucene sieve } protocol imap { mail_plugins = quota imap_quota } protocol pop3 { mail_plugins = quota pop3_uidl_format = UID%u-%v } Thanks

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[Dovecot] ot: tracking messages- luser troubleshooting
by voytek＠sbt.net.au 12 Dec '13

12 Dec '13

I had a user complaining of 'not getting emails' I've searched for sender in maillog, got two messages, both showed up as; Dec 12 15:51:29 emu postfix/pipe[9607]: 3F21C5E750: to=<xxx>, relay=dovecot, delay=6.4, delays=6.3/0.01/0/0.12, dsn=2.0.0, status=sent (delivered via dovecot service) Dec 12 15:51:29 emu postfix/qmgr[20178]: 3F21C5E750: removed yes the user claimed the message was not received, eventually, after traversing through severl directories, I found the message in '../Maildir/.Deleted Messages' it turns out it was inadvertenltly deleted on iphone. there has to be a better way to try to find / resolve such issues ? what's an optimal way of trying to trace such? I greped for the 3F21C5E750 string through several Maildirs tia,

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[Dovecot] Dovecot as caching proxy
by Anton Lundin 12 Dec '13

12 Dec '13

Hi. I'm bin playing around with dovecot to try to setup it as a caching imap proxy. I manged to get dovecot to use both proxy=y and imapc: connections to the master server, but i haven't manged to get dovecot to cache any mails. The remote imap server is a quite hostile one, that i don't have any super/master user access to, and it only exposes imap. I've used tried both with the static passdb, nopassword=y, and imap authdb and with static and prefetch userdbs. I manage to produce the same results, eg. dovecot grabbing the password from the client and uses it to establish a imapc connection to the server and re-exposing it, and starts to write indexes. ( The later plan is probably to use pam as passdb to grab a and store a hashed copy of the password to allow offline access to the cached emails, but thats a later problem to solve.) What i haven't managed to get working is to trigger some replication of the remote emails to dovecot and using that as a cache to serve the emails to the client. I found some presentations and some emails that point in the direction that this should be possible to achieve, probably with the replication plugin, but never managed to get this to work. I'm using dovecot 2.2.9 Does anyone have manged to produce a working setup like this? //Anton -- Anton Lundin +46702-161604

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[Dovecot] Dovecot 2.1.7 crash (with core dumped)
by Alessio Cecchi 12 Dec '13

12 Dec '13

Hi, I'm running dovecot 2.1.7 with vpopmail auth and Maildir on NFS (I have only one POP/IMAP server). All works fine but sometimes dovecot "imap" process crush and I would like to understand why: Error in log files: Dec 12 06:32:56 pop01eeh dovecot: imap-login: Login: user=<info(a)mydomain.com>, method=PLAIN, rip=1.2.3.4, lip=192.168.1.3, mpid=4086, session=<UbiBrU/tvACXCCva> Dec 12 06:50:25 pop01eeh dovecot: imap(info(a)mydomain.com), session=<UbiBrU/tvACXCCva>: Disconnected: Disconnected in IDLE in=654 out=704677 Dec 12 06:50:25 pop01eeh dovecot: imap(info(a)mydomain.com), session=<UbiBrU/tvACXCCva>: Panic: Message count decreased Dec 12 06:50:25 pop01eeh dovecot: imap(info(a)mydomain.com), session=<UbiBrU/tvACXCCva>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x4892a) [0x7f68af1ae92a] -> /usr/lib/dovecot/libdovecot.so.0(+0x48976) [0x7f68af1ae976] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f68af181faf] -> dovecot/imap() [0x4191e9] -> dovecot/imap() [0x40b366] -> dovecot/imap() [0x40b69c] -> dovecot/imap(command_exec+0x3d) [0x411ffd] -> dovecot/imap(client_command_cancel+0x3a) [0x4108da] -> dovecot/imap(client_destroy+0xdd) [0x41178d] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f68af1bab56] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f68af1bbb8f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f68af1baaf8] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f68af1a6413] -> dovecot/imap(main+0x2a4) [0x419dd4] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f68aee22c8d] -> dovecot/imap() [0x4090b9] Dec 12 06:50:25 pop01eeh dovecot: imap(info(a)mydomain.com), session=<UbiBrU/tvACXCCva>: Fatal: master: service(imap): child 4086 killed with signal 6 (core dumped) Backtrace: # gdb /usr/libexec/dovecot/imap /home/dovecot/core GNU gdb (GDB) 7.0.1-debian Copyright (C) 2009 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 the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/libexec/dovecot/imap...done. warning: Can't read pathname for load map: Input/output error. Reading symbols from /usr/lib/dovecot/libdovecot-storage.so.0...done. Loaded symbols for /usr/lib/dovecot/libdovecot-storage.so.0 Reading symbols from /usr/lib/dovecot/libdovecot.so.0...done. Loaded symbols for /usr/lib/dovecot/libdovecot.so.0 Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libc.so.6 Reading symbols from /usr/lib/libssl.so.0.9.8...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libssl.so.0.9.8 Reading symbols from /usr/lib/libcrypto.so.0.9.8...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libcrypto.so.0.9.8 Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/libdl.so.2 Reading symbols from /lib/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/librt.so.1 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libz.so.1 Reading symbols from /lib/libpthread.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libpthread.so.0 Reading symbols from /usr/lib/dovecot/lib01_acl_plugin.so...done. Loaded symbols for /usr/lib/dovecot/lib01_acl_plugin.so Reading symbols from /usr/lib/dovecot/lib02_imap_acl_plugin.so...done. Loaded symbols for /usr/lib/dovecot/lib02_imap_acl_plugin.so Reading symbols from /usr/lib/dovecot/lib10_quota_plugin.so...done. Loaded symbols for /usr/lib/dovecot/lib10_quota_plugin.so Reading symbols from /usr/lib/dovecot/lib11_imap_quota_plugin.so...done. Loaded symbols for /usr/lib/dovecot/lib11_imap_quota_plugin.so Reading symbols from /usr/lib/dovecot/lib20_expire_plugin.so...done. Loaded symbols for /usr/lib/dovecot/lib20_expire_plugin.so Reading symbols from /usr/lib/dovecot/lib20_zlib_plugin.so...done. Loaded symbols for /usr/lib/dovecot/lib20_zlib_plugin.so Reading symbols from /lib/libbz2.so.1.0...(no debugging symbols found)...done. Loaded symbols for /lib/libbz2.so.1.0 Reading symbols from /lib/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libgcc_s.so.1 Core was generated by `dovecot/imap'. Program terminated with signal 6, Aborted. #0 0x00007f68aee361b5 in raise () from /lib/libc.so.6 (gdb) bt full #0 0x00007f68aee361b5 in raise () from /lib/libc.so.6 No symbol table info available. #1 0x00007f68aee38fc0 in abort () from /lib/libc.so.6 No symbol table info available. #2 0x00007f68af1ae93d in default_fatal_finish (type=<value optimized out>, status=0) at failures.c:191 backtrace = 0x1980248 "/usr/lib/dovecot/libdovecot.so.0(+0x4892a) [0x7f68af1ae92a] -> /usr/lib/dovecot/libdovecot.so.0(+0x48976) [0x7f68af1ae976] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f68af181faf] -> dovecot/im"... #3 0x00007f68af1ae976 in i_internal_fatal_handler (ctx=0x7fffb9588e70, format=<value optimized out>, args=<value optimized out>) at failures.c:649 status = 0 #4 0x00007f68af181faf in i_panic (format=0xff6 <Address 0xff6 out of bounds>) at failures.c:263 ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0} args = {{gp_offset = 8, fp_offset = 48, overflow_arg_area = 0x7fffb9588f40, reg_save_area = 0x7fffb9588e80}} #5 0x00000000004191e9 in imap_sync_deinit (ctx=0x1a36ae0, sync_cmd=0x19a54c0) at imap-sync.c:242 client = 0x19a48e0 status = {messages = 1983, recent = 0, unseen = 0, uidvalidity = 1290163110, uidnext = 84072, first_unseen_seq = 0, first_recent_uid = 84072, last_cached_seq = 0, highest_modseq = 1, keywords = 0x0, permanent_flags = 0, nonpermanent_modseqs = 1, permanent_keywords = 0, allow_new_keywords = 0} sync_status = {sync_delayed_expunges = 0} ret = 0 #6 0x000000000040b366 in idle_finish (ctx=0x19a55b0, done_ok=false, free_cmd=false) at cmd-idle.c:38 client = 0x19a48e0 #7 0x000000000040b69c in cmd_idle_continue (cmd=0x19a54c0) at cmd-idle.c:234 client = 0x19a48e0 ctx = 0x19a55b0 orig_offset = 704677 #8 0x0000000000411ffd in command_exec (cmd=0x19a54c0) at imap-commands.c:148 hook = 0x1989cd0 ret = <value optimized out> #9 0x00000000004108da in client_command_cancel (_cmd=0x7fffb9589088) at imap-client.c:136 cmd = 0x19a54c0 cmd_ret = <value optimized out> #10 0x000000000041178d in client_destroy (client=0x19a48e0, reason=<value optimized out>) at imap-client.c:202 cmd = 0x0 __FUNCTION__ = "client_destroy" #11 0x00007f68af1bab56 in io_loop_call_io (io=0x1a35ad0) at ioloop.c:379 ioloop = 0x1988670 t_id = 2 #12 0x00007f68af1bbb8f in io_loop_handler_run (ioloop=<value optimized out>) at ioloop-epoll.c:213 ctx = 0x19889e0 event = 0x1988a50 list = 0x19a5410 io = 0xff6 tv = {tv_sec = 29, tv_usec = 999250} msecs = <value optimized out> ret = <value optimized out> i = 0 call = false #13 0x00007f68af1baaf8 in io_loop_run (ioloop=0x1988670) at ioloop.c:398 No locals. #14 0x00007f68af1a6413 in master_service_run (service=0x1988520, callback=0xff6) at master-service.c:544 No locals. ---Type <return> to continue, or q <return> to quit--- #15 0x0000000000419dd4 in main (argc=1, argv=0x1988370) at main.c:389 set_roots = {0x41cf20, 0x0} login_set = {auth_socket_path = 0x1980078 "/var/run/dovecot/auth-master", postlogin_socket_path = 0x0, postlogin_timeout_secs = 60, callback = 0x41a0b0 <login_client_connected>, failure_callback = 0x41a050 <login_client_failed>} service_flags = <value optimized out> storage_service_flags = MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT username = 0x0 c = <value optimized out> (gdb) And my configuration: dovecot -n # 2.1.17: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.8 auth_cache_size = 8 M deliver_log_format = msgid=%m, from=%f, subject="%s": %$ dict { acl = mysql:/etc/dovecot/dovecot-share-folder.conf expire = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no dotlock_use_excl = no first_valid_gid = 89 first_valid_uid = 89 last_valid_gid = 89 last_valid_uid = 89 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_fsync = always mail_location = maildir:~/Maildir mail_log_prefix = "%s(%u), session=<%{session}>: " mail_nfs_index = yes mail_nfs_storage = yes mail_plugins = quota acl zlib expire maildir_very_dirty_syncs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave vnd.dovecot.duplicate mmap_disable = yes namespace { list = children location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u prefix = shared/%%n/ separator = / subscriptions = no type = shared } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { special_use = \Junk } mailbox Trash { special_use = \Trash } prefix = separator = / } passdb { args = username_format=%Ld /etc/dovecot/extra/alias-domains-denylogin.txt deny = yes driver = passwd-file } passdb { args = cache_key=%s%u webmail=192.168.1.5 driver = vpopmail } plugin { acl = vfile:/etc/dovecot/global-acls:cache_secs=300 acl_shared_dict = proxy::acl expire = Trash expire2 = Spam expire_dict = proxy::expire quota = maildir:UserQuota quota2 = dict:Quota Usage::noenforcing:proxy::sqlquota quota_rule2 = Trash:storage=+100M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_before = /etc/dovecot/sieve/before.sieve sieve_dir = ~/sieve sieve_extensions = +vnd.dovecot.duplicate -vacation } pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s, bytes=%i/%o protocols = imap pop3 sieve service auth { unix_listener auth-userdb { group = vchkpw mode = 0660 user = vpopmail } } service dict { process_limit = 300 unix_listener dict { group = vchkpw mode = 0660 user = vpopmail } } service imap-login { process_min_avail = 4 service_count = 0 } service imap { process_limit = 2400 } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { service_count = 0 } service quota-warning { executable = script /etc/dovecot/scripts/quota-warning.sh unix_listener quota-warning { user = vpopmail } user = vpopmail } ssl_cert = </etc/dovecot/ssl/wildcard-myserver.net.pem ssl_key = </etc/dovecot/ssl/wildcard-myserver.net.key submission_host = localhost userdb { args = quota_template=quota_rule=*:backend=%q driver = vpopmail } protocol lda { mail_plugins = quota acl zlib expire sieve } protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags imap_idle_notify_interval = 29 mins mail_max_userip_connections = 15 mail_plugins = quota acl zlib expire imap_quota imap_acl } protocol sieve { mail_max_userip_connections = 2 } protocol pop3 { mail_max_userip_connections = 5 pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } Thanks -- Alessio Cecchi is: @ ILS -> http://www.linux.it/~alessice/ on LinkedIn -> http://www.linkedin.com/in/alessice Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz Cloud Email Hosting -> http://www.qboxmail.com @ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it

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[Dovecot] Dovecot connection problem - Too many invalid commands (no auth attempts) - v2.0.19
by Thomas Standaert 12 Dec '13

12 Dec '13

Hello. This might be a silly problem, but I'm a bit a newbie at this, and the internet didn't give me a solution to this yet. I installed a mail server with postfix, dovecot, postfixadmin and a mysql DB for authentification, using this tutorial : <http://www.exratione.com/2012/05/a-mailserver-on-ubuntu-1204-postfix-doveco t-mysql/> http://www.exratione.com/2012/05/a-mailserver-on-ubuntu-1204-postfix-dovecot -mysql/. Except step 4. The complete tutorial worked on a virtual machine, but doesn't work here on a vps from ovh.net. Connecting via telnet localhost 143 works, I can connect. When I try to connect via thunderbird, the domain name is picked up, but gives me a bad login/password combination. Mail.log, mail.err and error don't show anything. Via MS Outlook, I seem to get stuck on the connection page, and I get the following errors in mail.log: dovecot: imap-login: Disconnected: Too many invalid commands (no auth attempts): rip=x, lip=y dovecot: pop3-login: Disconnected (no auth attempts): rip=x, lip=y dovecot: imap-login: Disconnected (no auth attempts): rip=x, lip=y, TLS: Disconnected dovecot: pop3-login: Disconnected (no auth attempts): rip=x, lip=y, TLS: Disconnected dovecot: pop3-login: Aborted login (no auth attempts): rip=x, lip=y dovecot: imap-login: Disconnected (no auth attempts): rip=x, lip=y, TLS: Disconnected dovecot: imap-login: Disconnected (no auth attempts rip=x, lip=y dovecot: imap-login: Disconnected (no auth attempts): rip=x, lip=y, TLS handshaking: Disconnected dovecot: pop3-login: Disconnected (no auth attempts): rip=x, lip=y, TLS handshaking: Disconnected And after a while asks to try to connect via plain method. Doveconf -n gives me this # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-042stab068.8 x86_64 Ubuntu 12.04.2 LTS simfs auth_mechanisms = plain login first_valid_uid = 150 last_valid_uid = 150 mail_gid = mail mail_location = maildir:/var/vmail/%d/%n mail_uid = vmail passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocols = " imap pop3" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = mail mode = 0600 user = vmail } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } Hope you guys can help me, and thanks in advance for it. Greetings, Thomas Standaert

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[Dovecot] multiple passdbs and auth sockets
by Jouko Nikula 12 Dec '13

12 Dec '13

Hello, I want to use different authentication arguments for smtp and imap/pop3. In the dovecot list I found this: http://www.dovecot.org/list/dovecot/2013-August/091960.html I tried to follow these instructions but dovecot refuses to find the auth executable: Dec 12 10:36:18 jlaptop postfix/smtpd[7302]: connect from localhost[127.0.0.1] Dec 12 10:36:18 jlaptop dovecot: auth-10: Error: doveconf: Fatal: execvp(/usr/local/var/run/dovecot/dovecot/auth) failed: No such file or directory Dec 12 10:36:18 jlaptop dovecot: master: Error: service(auth-10): command startup failed, throttling for 2 secs Dec 12 10:36:18 jlaptop dovecot: auth-10: Fatal: master: service(auth-10): child 7304 returned error 89 (Fatal failure) Dec 12 10:36:18 jlaptop postfix/smtpd[7302]: fatal: no SASL authentication mechanisms Dec 12 10:36:19 jlaptop postfix/master[7046]: warning: process /usr/lib/postfix/smtpd pid 7302 exit status 1 Dec 12 10:36:19 jlaptop postfix/master[7046]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling My settings for postfix and dovecot are as follows: root@jlaptop:/usr/local/etc/dovecot/conf.d# postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix default_transport = error home_mailbox = Maildir/ inet_interfaces = loopback-only mailbox_command = mailbox_size_limit = 0 myhostname = jlaptop mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 queue_directory = /var/spool/postfix readme_directory = no recipient_delimiter = + relay_transport = error relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth-10 smtpd_sasl_type = dovecot smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes virtual_gid_maps = static:8 virtual_mailbox_base = /var/mail/smtp virtual_mailbox_domains = jlaptop.com virtual_mailbox_maps = hash:/etc/postfix/vmaps virtual_minimum_uid = 100 virtual_uid_maps = static:124 root@jlaptop:/usr/local/etc/dovecot/conf.d# doveconf -n # 2.2.9: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 3.11.0-13-generic x86_64 Ubuntu 13.10 auth_debug = yes auth_debug_passwords = yes auth_verbose = yes first_valid_uid = 124 mail_gid = mail mail_home = /var/mail/imap/%n mail_location = maildir:~/mail mail_plugin_dir = /usr/local/lib/dovecot/ mail_plugins = gpgfuse_umount mail_uid = vmail 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 { args = session=yes dovecot driver = pam } protocols = imap pop3 lmtp imap pop3 service auth-10 { executable = auth -c /usr/local/etc/dovecot-auth-smtp.conf process_limit = 1 unix_listener /var/spool/postfix/private/auth-10 { group = postfix mode = 0666 user = postfix } } ssl_cert = </etc/dovecot/dovecot.pem ssl_key = </etc/dovecot/private/dovecot.pem userdb { args = uid=vmail gid=mail home=/var/mail/imap/%n driver = static } The file /usr/local/etc/dovecot-auth-smtp.conf is as follows: auth_mechanisms = plain login disable_plaintext_auth = no #auth_username_format = %Lu auth_debug = yes auth_debug_passwords = yes auth_verbose = yes first_valid_uid = 124 mail_gid = mail mail_uid = vmail protocols = imap pop3 lmtp imap pop3 ssl_cert = </etc/dovecot/dovecot.pem ssl_key = </etc/dovecot/private/dovecot.pem passdb { driver = pam args = dovecot } userdb { driver = static args = uid=vmail gid=mail home=/var/mail/imap/%n } The result is exactly the same also if I don't give the path to auth. I.e.: executable = auth -c /usr/local/etc/dovecot-auth-smtp.conf In order to get past this problem I provided the auth executable in /usr/local/var/run/dovecot/dovecot/auth, but then I get a new problem: Dec 12 12:31:53 jlaptop postfix/smtpd[9220]: connect from localhost[127.0.0.1] Dec 12 12:31:53 jlaptop dovecot: auth-10: Error: Debug: Loading modules from directory: /usr/local/lib/dovecot/auth Dec 12 12:31:53 jlaptop dovecot: auth-10: Error: Debug: Read auth token secret from /usr/local/var/run/dovecot/auth-token-secret.dat Dec 12 12:32:03 jlaptop postfix/smtpd[9220]: fatal: no SASL authentication mechanisms Dec 12 12:32:04 jlaptop postfix/master[8842]: warning: process /usr/lib/postfix/smtpd pid 9220 exit status 1 Dec 12 12:32:04 jlaptop postfix/master[8842]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling My test client is thunderbird with smtp connection security "None" and Authentication method "Password, transmitted insecurely". Any ideas what is going wrong? Is there a better way to provide different passdb settings for smtp and imap/pop3? regards, - Jouko

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[Dovecot] Selectively allow non-SSL connections based on userdb
by Trent Lloyd 12 Dec '13

12 Dec '13

Howdy Folks, I am considering transitioning our mail service over to SSL-only. As a transition mechanism, it would make sense to force all new accounts to use SSL, but still allow old accounts to go unencrypted until some transition date passes. I have done some extensive searching but could not figure a mechanism through which I could specify a setting for this in userdb or similar. Does anyone have any ideas that doesn’t involve a post-login script? Thanks, Trent

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[Dovecot] base_dir= problems
by Philippe Lelédy 12 Dec '13

12 Dec '13

Hi I first let base_dir = with it's default value of /var/dovecot. I changed my mind and now I have doveconf -n # 2.1.17: /etc/dovecot/dovecot.conf # OS: OpenBSD 5.4 amd64 ffs base_dir = /var/run/dovecot/ After a few days, imap clients couldn't login. Here the problem Dec 04 17:03:16 imap-login: Fatal: Corrupted SSL parameters file: /var/dovecot/ssl-parameters.dat Dec 04 17:03:16 imap-login: Fatal: Corrupted SSL parameters file: /var/dovecot/ssl-parameters.dat Dec 04 17:03:16 master: Error: mkdir(/var/dovecot) failed: Read-only file system Dec 04 17:03:16 master: Error: safe_mkstemp(/var/dovecot/mounts.tmp.) failed: No such file or directory Dec 04 17:03:16 master: Error: file_dotlock_open(/var/dovecot/instances) failed: No such file or directory Dec 04 17:03:16 ssl-params: Fatal: creat(/var/dovecot/ssl-parameters.dat.tmp) failed: No such file or directory By-pass ln -s /var/run/dovecot /var/dovecot Strange ? Ph. Le.

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[Dovecot] Plugin development - ostream and index cache size
by Philipp Brüll 11 Dec '13

11 Dec '13

Hi, I'm new to this list, so first thanks for the dovecot tool! So far, it has been great to work with. Currently, I'm developing a scrambler plugin for dovecot, that should stores the mails encrypted. To do that, I've created the scrambler_ostream and scrambler_istream that does the encryption and that I hook in the mail storage process. The scrambler_ostream is stacked on top of the output stream of the mail_save_context (mail_save_context->data.output) and the scrambler_istream is attached to the input stream when the virtual function istream_opened in the mail_private struct is called. Basically, the encrypt/decrypt works, but during the process the data size changes slightly. And when I'm doing a FETCH BINARY[] via imap, it results in the error... Cached message size smaller than expected (204 < 208) Error: Corrupted index cache file /home/.../mail/mailboxes/INBOX/dbox-Mails/dovecot.index.cache: Broken physical size for mail UID 1 My guess is, that the FETCH function tries to deliver the unencrypted cache version of the mail (204 bytes) and not the stored version (208 bytes). How can I make dovecot cache the output of my scrambler_ostream or at least disable this caching for testing? I've read already a lot of code, but I've found a hint yet. How does - for example - the zlib plugin handle this issue? I have read the code a couple of times, but still have no clue. Best regards, Philipp

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