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[Dovecot] Auth worker max line size
by Emmanuel Dreyfus 09 Sep '12

09 Sep '12

Hello I have been playing with some exotic authentication scheme with Dovecot and PAM. That involves sending really large base64 encoded data as the IMAP password, and I have hit a line limit in Dovecot, with AUTH_WORKER_MAX_LINE_LENGTH set to 1024. This limit is especially frustrating since other parts of the software use much larger limits: MAX_INBUF_SIZE 4096 MAX_IMAP_LINE 8192 AUTH_CLIENT_MAX_LINE_LENGTH 8192 I had to make the patch attached below to get my authentication working. I can live with this local patch, but given the much more liberal limits of MAX_INBUF_SIZE at 4096 makes we wonder if this 1024 limit on AUTH_WORKER_MAX_LINE_LENGTH could not be a bug. Or is there a security concern at using more than 1kB? Opinions? (please Cc: me, I'm not subscribed ot the list) --- src/auth/auth-worker-client.h.orig 2009-06-23 18:32:15.000000000 +0200 +++ src/auth/auth-worker-client.h 2009-06-23 18:32:33.000000000 +0200 @@ -1,8 +1,8 @@ #ifndef AUTH_WORKER_CLIENT_H #define AUTH_WORKER_CLIENT_H -#define AUTH_WORKER_MAX_LINE_LENGTH 1024 +#define AUTH_WORKER_MAX_LINE_LENGTH 4096 struct auth_worker_client *auth_worker_client_create(struct auth *auth, int fd); void auth_worker_client_destroy(struct auth_worker_client **client); void auth_worker_client_unref(struct auth_worker_client **client); -- Emmanuel Dreyfus manu(a)netbsd.org

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[Dovecot] Vpopmail Dynamic Authentication Module
by Eric Sisolak 08 Sep '12

08 Sep '12

Hello, We currently use qmail with vpopmail for e-mail and are looking to switch from courier-imap to dovecot for IMAP on our RedHat EL 5 systems. Our goal is to use the dovecot RPM supplied by RH (v1.0.7) if at all possible. We can do this if we are able to dynamically load the vpopmail auth module. The wiki (http://wiki.dovecot.org/CompilingSource) notes that this should be possible: Dovecot can also dynamically load authentication modules from the $prefix/lib/dovecot/auth/ directory. Binary packages builders should use them for authentication modules which require external libraries (e. g. LDAP and vpopmail). There is no standard way to build them as modules currently, but something like this should work: gcc -shared -fPIC -DHAVE_CONFIG_H -DUSERDB_VPOPMAIL -DPASSDB_VPOPMAIL \-I../.. -I../lib userdb-vpopmail.c passdb-vpopmail.c -o vpopmail.so \-lvpopmail I had to modify the command to build the module, but was able to successfully build it: gcc -shared -fPIC -DHAVE_CONFIG_H -DUSERDB_VPOPMAIL -DPASSDB_VPOPMAIL -I../.. -I../lib -I/home/vpopmail/include -I/home/vpopmail/lib userdb-vpopmail.c passdb-vpopmail.c -o vpopmail.so -L/home/vpopmail/lib/libvpopmail.a I am unable to get the module to load properly. Dovecot built with --with-vpopmail works perfectly. When I start dovecot and it tries to load the module it reports: Aug 23 16:48:18 ctd-nix1 dovecot: Dovecot v1.0.7 starting up Aug 23 16:48:18 ctd-nix1 dovecot: auth(default): dlopen(/usr/lib64/dovecot/auth/vpopmail.so) failed: /usr/lib64/dovecot/auth/vpopmail.so: undefined symbol: vclose Aug 23 16:48:18 ctd-nix1 dovecot: auth(default): dlsym(passdb_vpopmail) failed: dovecot-auth: undefined symbol: passdb_vpopmail Aug 23 16:48:18 ctd-nix1 dovecot: auth(default): Unknown passdb driver 'vpopmail' (typo, or Dovecot was built without support for it? Check with dovecot --build-options) Aug 23 16:48:18 ctd-nix1 dovecot: Auth process died too early - shutting down Sometimes instead the last line is replaced with: Aug 23 15:02:45 ctd-nix1 dovecot: child 5412 (auth) returned error 89 Thanks! Eric

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[Dovecot] problem about pop3 using dovecot
by bmalik 08 Sep '12

08 Sep '12

I upgraded dovecot from 1.1 to 2.1.8 pop3/imap works but i have a problem. i use pop3 protocol on outlook 2010 for my account. and i set keep my mails on the server for 5 days or until i delete them. These settings were working old dovecot1.1. But when i upgraded it to 2.1.8. if i even delete a mail from outlook the server doesn't delete or old mails are not deleted. what can be the problem ? thanks -- View this message in context: http://dovecot.2317879.n4.nabble.com/problem-about-pop3-using-dovecot-tp373… Sent from the Dovecot mailing list archive at Nabble.com.

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Re: [Dovecot] about postlogin in dovecot2
by Joseph Tam 07 Sep '12

07 Sep '12

<bmalik(a)ihlas.net.tr> writes: > where do i have to locate the passwd-file in dovecot2 For what purpose? Master user? Password/user lookup? passdb { driver = passwd-file master = yes args = /anywhere/you/want/master-users pass = yes } passdb { driver = passwd-file args = /anywhere/you/want/passwd } userdb { driver = passwd-file args = /anywhere/you/want/passwd } Joseph Tam <jtam.home(a)gmail.com>

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[Dovecot] Disconnect users for a distinct period of time?
by Michael Grimm 07 Sep '12

07 Sep '12

Hi -- Today, I've learned who to disable incoming mail delivery to dovecot (accepted by postfix), temporarily. Now, I would like to know if there is a way to make a "doveadm kick -A" a permanent disconnect until one would allow reconnects, again? This should be done *without* shutting down dovecot or *extensive* re-configuration. A "doveadm block -u <joe> -m 'sorry: running maintenance, please, come back later'" alike tool/funtionality would be ideal. Background: I would like to avoid any modification of my user's maildirs by a running dovecot server while modifying maildir formats, mdbox_rotate_size setting, and alike, where I would need doveadm/dsnyc access to userdb. (I know there a ways to achieve this without downtimes, and I have already done so.) I just want to be sure that I haven't overseen such a tool/functionality in the documentation. Did I or didn't I? Thanks and regards, Michael

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[Dovecot] pop3 migration
by TeTeHacko 07 Sep '12

07 Sep '12

Hi, I have problems with pop3 migration, the server disconect the dovesync when fetching mails after 5 minutes with this error in server log: xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6548 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 47522 octets xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6549 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 355289 octets xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6550 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 9638 octets xx.xx.xx.xx [28F4] 11:54:05 <<< RETR 6551 xx.xx.xx.xx [28F4] 11:54:05 >>> +OK 2188 octets xx.xx.xx.xx [28F4] 11:59:05 >>> -ERR Command unrecognized: "" xx.xx.xx.xx [28F4] 11:59:05 *** <info(a)istan.cz> 6551 477693894 00:12:55 ERROR xx.xx.xx.xx [28F4] 11:59:05 Disconnected and this in dovecot log: dsync(info(a)istan.cz): Debug: imapc(mail.stable.cz:143): Authenticated successfully dsync(info(a)istan.cz): Debug: pop3c(mail.stable.cz): Looking up IP address dsync(info(a)istan.cz): Debug: pop3c(mail.stable.cz): Connecting to 88.86.120.212:110 dsync(info(a)istan.cz): Debug: pop3c(mail.stable.cz): Authenticating as info(a)istan.cz dsync(info(a)istan.cz): Error: pop3c(mail.stable.cz): Server disconnected unexpectedly dsync(info(a)istan.cz): Error: pop3_migration: Failed to get header for msg 1: Disconnected dsync(info(a)istan.cz): Error: pop3_migration: Failed to get header for msg 2: Disconnected dsync(info(a)istan.cz): Error: pop3_migration: Failed to get header for msg 3: Disconnected dsync(info(a)istan.cz): Error: pop3_migration: Failed to get header for msg 4: Disconnected is there any timeout in dovecot for 300s? can anybody point me where may be some problem? This error occurs everytime i test it and the mail box has cca 2GB, on small mailboxes is no problem, i try this patch: http://hg.dovecot.org/dovecot-2.1/rev/ab6a4455b27d on dovecot version 2.1.7 but the problem isn't solved. Thanks for help Tomas Herceg

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[Dovecot] dsync mirror and sieve ?
by Xavier Beaudouin 07 Sep '12

07 Sep '12

Hi there, I am currently doing some extensive test with dsync, but it appear that : dsync -u <user> maildir:/path/to/new/Maildir doesn't seems to sync sieves rules. Is there a good way to sync sieves as well ? :p Regards, Xavier

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Re: [Dovecot] Removing specific entry in user/auth cache
by Joseph Tam 07 Sep '12

07 Sep '12

Francisco Wagner C. Freire <wgrcunha(a)gmail.com> writes: > On Wed, Jun 27, 2012 at 9:24 AM, Timo Sirainen <tss(a)iki.fi> wrote: > >> On 27.6.2012, at 14.10, Angel L. Mateo wrote: >> >>> We have dovecot configured with auth cache. Is there any way to >> remove a specific entry (not all) from this cache? >> >> Nope. What do you need it for? > > I dont known about Angel, but for me is useful because sometimes i need to > deactivate smtp/imap/pop access from accounts, or change their home after > storage migration, and removing a specific record i can use a long time > cache. I'm not sure that the auth cache holds that information, but I think you can at least invalidate a particular auth cache entry by 1) Changing the user password (and save the previous hash) 2) Authenticate using the new credentials (and invalidate the auth cache entry). For example, you can just do a manual connection on your dovecot server x login someuser newpassword This will replace the cache entry with a new one. 3) When you are ready to put the account back online, change the password back to the original. A password mismatch forces a resync to your authentication system which will restore the auth cache. Joseph Tam <jtam.home(a)gmail.com>

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[Dovecot] Managesieve segfault with dovecot 2.1.8
by Daniel Parthey 07 Sep '12

07 Sep '12

Hi, I'm getting segfaults and unexpected disconnects from managesieve server, when the Thunderbird SIEVE extension tries to validate SIEVE scripts agains Pidgeonhole in Dovecot 2.1.8. The extension says: "Server terminated unexpectedly the connection, click on reconnect to try again." It can be reproduced by simply calling CHECKSCRIPT followed by a string: mail01:~# telnet 127.0.0.1 19200 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. "IMPLEMENTATION" "Sieve" "SIEVE" "fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave" "NOTIFY" "mailto" "SASL" "PLAIN" "VERSION" "1.0" OK "Mailbox" AUTHENTICATE "PLAIN" "AGRwYXJ0aGV5QGV4YW1wbGUub3JnAGRwYXJ0aGV5" OK "Logged in." CHECKSCRIPT {6+} abcdef Connection closed by foreign host. The server interrupts the connection and the logs show the following: # dovecot.log Sep 7 01:40:46 dovecot: mailbox: mail: managesieve(dparthey(a)example.org): Fatal: master: service(managesieve): child 31356 killed with signal 11 (core dumped) # kern.log Sep 7 01:40:46 kernel: [1417105.954609] managesieve[31356]: segfault at 0 ip 00007f1c415c4876 sp 00007fffb3731f88 error 4 in libc-2.11.1.so[7f1c41543000+17a000] Here is the backtrace: mail01:~# gdb /usr/lib/dovecot/managesieve /var/tmp/core.managesieve.31356 Core was generated by `dovecot-mailbox/managesieve'. Program terminated with signal 11, Segmentation fault. #0 0x00007f1c415c4876 in ?? () from /lib/libc.so.6 (gdb) bt full #0 0x00007f1c415c4876 in ?? () from /lib/libc.so.6 No symbol table info available. #1 0x000000000040b1c3 in sieve_storage_save_will_activate (ctx=0x257f1a0) at sieve-storage-save.c:328 _data_stack_cur_id = 4 scriptname = 0x25400ae "default.sieve" ret = <value optimized out> #2 0x00000000004065b0 in cmd_putscript_finish_parsing (cmd=0x2575cb8) at cmd-putscript.c:206 ehandler = <value optimized out> cpflags = <value optimized out> sbin = <value optimized out> errors = <value optimized out> _data_stack_cur_id = 0 script = <value optimized out> client = 0x2575c30 ctx = 0x2578180 args = 0x254bc68 ret = <value optimized out> #3 0x0000000000406838 in cmd_putscript_continue_script (cmd=0x2575cb8) at cmd-putscript.c:423 all_written = <value optimized out> client = 0x2575c30 ctx = 0x2578180 size = 39279968 #4 0x0000000000406caf in client_input_putscript (context=0x2575c30) at cmd-putscript.c:84 cmd = 0x2575cb8 __FUNCTION__ = "client_input_putscript" #5 0x00007f1c41d1d3e6 in io_loop_call_io (io=0x2575fd0) at ioloop.c:379 ioloop = 0x2548680 t_id = 2 #6 0x00007f1c41d1e46f in io_loop_handler_run (ioloop=<value optimized out>) at ioloop-epoll.c:213 ctx = 0x25489f0 event = 0x2548a60 list = 0x2576020 io = 0x0 tv = {tv_sec = 18, tv_usec = 988469} msecs = <value optimized out> ret = <value optimized out> i = 0 call = false #7 0x00007f1c41d1d388 in io_loop_run (ioloop=0x2548680) at ioloop.c:398 No locals. #8 0x00007f1c41d09653 in master_service_run (service=0x2548530, callback=0x25400ae) at master-service.c:543 No locals. #9 0x00000000004096ce in main (argc=1, argv=0x2548370) at main.c:308 set_roots = {0x610d60, 0x0} login_set = {auth_socket_path = 0x2540088 "/var/run/dovecot/auth-master", postlogin_socket_path = 0x0, postlogin_timeout_secs = 60, callback = 0x409810 <login_client_connected>, failure_callback = 0x409290 <login_client_failed>} service_flags = <value optimized out> storage_service_flags = MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT username = 0x0 c = <value optimized out> Regards Daniel -- https://plus.google.com/103021802792276734820

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[Dovecot] thunderbird not connecting
by cc young 07 Sep '12

07 Sep '12

cannot get TB to recognize either pop3/s or imap/s server can connect just fine with: openssl s_client -connect ms1.myserver.net:993 . login ... but trying with TB /var/log/mail.log gets: dovecot: pop3-login: Aborted login (no auth attempts): rip=223.205.150.234, lip=xxx.xx.xx.xx dovecot: imap-login: Aborted login (no auth attempts): rip=223.205.150.234, lip=xxx.xx.xx.xx -- View this message in context: http://dovecot.2317879.n4.nabble.com/thunderbird-not-connecting-tp37389.html Sent from the Dovecot mailing list archive at Nabble.com.

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