- dovecot - dovecot.org

Ubuntu packages
by Peter Chiochetti 07 Mar '16

07 Mar '16

Since dovecot put up packages on their own repo, bigmichi stopped providing his'. I guess this is not Stephan; Would the kind person update ppa.launchpad.net/bigmichi1 ? Thank You -- peter

11 18

VS: Re: v2.2.22 release candidate released
by Aki Tuomi 06 Mar '16

06 Mar '16

In future release we will add master authentication too. Now you can use api key or doveadm password which are essentially same thing. ---Aki TuomiDovecot oy-------- Alkuperäinen viesti --------Lähettäjä: Peter Chiochetti <pch(a)myzel.net> Päivämäärä: 4.3.2016 20.20 (GMT+02:00) Saaja: dovecot(a)dovecot.org Aihe: Re: v2.2.22 release candidate released Am 2016-03-04 um 14:33 schrieb Timo Sirainen: > + Added doveadm HTTP API: See > http://wiki2.dovecot.org/Design/DoveadmProtocol/HTTP Hmm, so anybody who has the API key can send any doveadm commands? I guess something like /etc/sudoers for API keys would be good? Did I miss something? -- peter

3 2

Re: Dovecot stops responding when I update SSL certificate
by Joseph Tam 06 Mar '16

06 Mar '16

HotSlots Webmaster <webmaster(a)hotslots132.com> writes: > I have had Dovecot working fine with SSL for nearly two years now. It's > time to renew the SSL certificate, so I did (same CA). The new > certificate works fine in Apache and Postfix. But when I update Dovecot > to use the same certificate, and restart the server, Dovecot stops > responding to connects. > ... > Here is the end of the dovecot -n file that mentions SSL: > ... > ssl_dh_parameters_length = 2048 When you start dovecot, does CPU load of dovecot/ssl-params roof to 100%? It's possible it's generating ephemeral DH keys. In a previous post to this list, I note that the run time to generate these keys can vary wildly, and gets worse with longer keys. Sometimes you get lucky, and you'll generate then quickly, sometimes it takes a long while (minutes). http://dovecot.org/pipermail/dovecot/2015-November/102447.html Try running openssl dhparam -noout 2048 to see how it varies for you. If what I suspect is true, you can try using shorter keys. A followup post suggest a way you can precompute the key Joseph Tam <jtam.home(a)gmail.com>

3 2

VS: Re: Implementation of TLS OCSP Stapling
by Aki Tuomi 06 Mar '16

06 Mar '16

Luckily ocsp stapling is an SSL extension and clients not supporting it won't be asking for it either. ---Aki TuomiDovecot oy -------- Alkuperäinen viesti --------Lähettäjä: Andrew McGlashan <andrew.mcglashan(a)affinityvision.com.au> Päivämäärä: 6.3.2016 10.36 (GMT+02:00) Saaja: dovecot(a)dovecot.org Aihe: Re: Implementation of TLS OCSP Stapling On 3/03/2016 11:58 PM, aki.tuomi(a)dovecot.fi wrote: > We will take this feature under consideration and see if it can be implemented > in future release. Thank you for your suggestion! As much as I hate Outlook (Look Out!), there are loads of people using really old versions; 2003 is no longer supported, but loads of people use 2007. Thunderbird can be expected to be far more up to date. Implementing features to work with older clients will always be a problem. Just a simple example, almost unrelated here, but this is either wrong by TB or wrong by Outlook (versions 2007, 2010 and 2013 that I know of). When the IMAP server sends a message, OL will pop up a window that requires the user to acknowledge the message via a popup. TB just pops up the message in the normal 'new mail' notify if that is configured and it might be lost if notify isn't set to show. Either way, the implementation is different b/w the two client products. Is OL right or is TB right... IMAP doco says that the message should be made to be acknowledged by the client; OL's version can't easily be ignored or missed, but TB's can easily be missed. But TB's implementation is more user friendly if the server wants to keep sending messages from time to time. I considered using this for MOTD type stuff and maybe random inspirational or motivational messages; even to remind or inform users to do certain things [one example in the dovecot wiki is to advise that the vacation message is still active]. A TB notification is next to harmless, but an OL one needs to be acknowledged every time, which would be very painful. Anyway, the point is that if a feature is added for OCSP stabling support, you couldn't really expect older versions of Look Out to comply with it (even though M$ could patch it easily, they care less about older versions than getting people to subscribe to Office 365 these days). Cheers A.

1 0

Implementation of TLS OCSP Stapling
by dovecot＠flut.demon.nl 06 Mar '16

06 Mar '16

Hi all, About a year ago, Torsten already asked for OCSP stapling (http://dovecot.org/pipermail/dovecot/2015-April/100632.html) Unfortunately, there was no answer to his question. Now RFC 7633 ("TLS Feature Extension", https://tools.ietf.org/html/rfc7633, a.k.a. "Must Staple") has landed, revocation is getting serious! I personally would like to embed all my TLS certificates with the must-staple extension. The great project Let's Encrypt already supports it: https://github.com/letsencrypt/boulder/pull/1224 I'm aware most MTAs don't really care about the certificate, but big players as Google take TLS encryption very seriously: https://googleblog.blogspot.nl/2016/02/building-safer-web-for-everyone.html So I would like to know if Dovecot is planning to feature OCSP stapling. That way I know for sure my "must staple" certificates can be used by Dovecot. And in my opinion, every TLS offering daemon should be up to par to the capabilities of TLS.. Not lag behind :) What's your opinion on this matter? Thanks in advance for any anwser! Greets, Osiris

7 11

dovecot local indexes and multiple servers
by alex 05 Mar '16

05 Mar '16

Hi, I've been testing mdbox with local indexes on our nfs based directors + multiple imap/lda/pop3 server setup. The performance is noticeably better than maildir with indexes on nfs, so I'd like to make this work. About the possible direction to other servers the wiki says that it will create a new index 'on the fly'. That is true, but after the index is recreated, Thunderbird (imap) re-downloads all the messages and sees all those messages as unread again! This is probably quite logical as the message status is only kept in the indexes, but this is not very customer friendly. Is there a way to avoid this problem? I'd rather not manually sync those local indexes between our servers. In fact, I was planning on deleting (old) indexes when a user moved to another server or even if they haven't checked their mail for XX days. with up to 10Gb mailboxes the indexes themselves can get up to 20-40Mb for a mailbox. that amounts to quite a lot of storage for 200k+ users. Thanks, Alex.

2 2

VS: Dovecot stops responding when I update SSL certificate
by Aki Tuomi 05 Mar '16

05 Mar '16

Did you change dh parameter size as well? This causes dh generation which can take some time. ---Aki TuomiDovecot oy-------- Alkuperäinen viesti --------Lähettäjä: HotSlots Webmaster <webmaster(a)hotslots132.com> Päivämäärä: 5.3.2016 4.10 (GMT+02:00) Saaja: dovecot(a)dovecot.org Aihe: Dovecot stops responding when I update SSL certificate Dovecot 2.2.18 CentOS 6.7 (x86_64) Plesk 12.5.30 I have had Dovecot working fine with SSL for nearly two years now. It's time to renew the SSL certificate, so I did (same CA). The new certificate works fine in Apache and Postfix. But when I update Dovecot to use the same certificate, and restart the server, Dovecot stops responding to connects. I have triple-checked that the ssl_cert and ssl_key files are correct - all I did was change the names in the conf file. There's nothing in the log. I have tried various SSL tests but either they don't work (unspecific error) or they tell me nothing is wrong (and show the correct certificate.) I am running out of time to find a solution to this - what else can I look for? The one difference for the certificates is that I opted for one with a SHA256 root rather than SHA1 root. I have separately used a tool to verify that the certificate and private key match. Here is the end of the dovecot -n file that mentions SSL: ssl = required ssl_cert = </etc/pki/tls/certs/hotslots-cert.pem ssl_cipher_list = EECDH+AESGCM+AES128:EECDH+AESGCM+AES256:EDH+AESGCM+AES128:EDH+AESGCM+AES256:EECDH+SHA256+AES128:EECDH+SHA384+AES256:EDH+SHA256+AES128:EDH+SHA256+AES256:EECDH+SHA1+AES128:EECDH+SHA1+AES256:EDH+SHA1+AES128:EDH+SHA1+AES256:EECDH+HIGH:EDH+HIGH:AESGCM+AES128:AESGCM+AES256:SHA256+AES128:SHA256+AES256:SHA1+AES128:SHA1+AES256:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!KRB5:!aECDH:!EDH+3DES ssl_dh_parameters_length = 2048 ssl_key = </etc/ssl/private/hotslots-private.pem ssl_protocols = TLSv1.1 TLSv1.2 !TLSv1 userdb { args = uid=popuser gid=popuser driver = static } protocol imap { mail_plugins = " quota imap_quota" } protocol pop3 { pop3_uidl_format = UID%u-%v } protocol lda { mail_plugins = " quota sieve" } (The !TLSv1 doesn't seem to be honored - I tried it with and without that. A problem for later.) Thanks for any help. Steve L

1 0

Dovecot stops responding when I update SSL certificate
by HotSlots Webmaster 05 Mar '16

05 Mar '16

Dovecot 2.2.18 CentOS 6.7 (x86_64) Plesk 12.5.30 I have had Dovecot working fine with SSL for nearly two years now. It's time to renew the SSL certificate, so I did (same CA). The new certificate works fine in Apache and Postfix. But when I update Dovecot to use the same certificate, and restart the server, Dovecot stops responding to connects. I have triple-checked that the ssl_cert and ssl_key files are correct - all I did was change the names in the conf file. There's nothing in the log. I have tried various SSL tests but either they don't work (unspecific error) or they tell me nothing is wrong (and show the correct certificate.) I am running out of time to find a solution to this - what else can I look for? The one difference for the certificates is that I opted for one with a SHA256 root rather than SHA1 root. I have separately used a tool to verify that the certificate and private key match. Here is the end of the dovecot -n file that mentions SSL: ssl = required ssl_cert = </etc/pki/tls/certs/hotslots-cert.pem ssl_cipher_list = EECDH+AESGCM+AES128:EECDH+AESGCM+AES256:EDH+AESGCM+AES128:EDH+AESGCM+AES256:EECDH+SHA256+AES128:EECDH+SHA384+AES256:EDH+SHA256+AES128:EDH+SHA256+AES256:EECDH+SHA1+AES128:EECDH+SHA1+AES256:EDH+SHA1+AES128:EDH+SHA1+AES256:EECDH+HIGH:EDH+HIGH:AESGCM+AES128:AESGCM+AES256:SHA256+AES128:SHA256+AES256:SHA1+AES128:SHA1+AES256:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!KRB5:!aECDH:!EDH+3DES ssl_dh_parameters_length = 2048 ssl_key = </etc/ssl/private/hotslots-private.pem ssl_protocols = TLSv1.1 TLSv1.2 !TLSv1 userdb { args = uid=popuser gid=popuser driver = static } protocol imap { mail_plugins = " quota imap_quota" } protocol pop3 { pop3_uidl_format = UID%u-%v } protocol lda { mail_plugins = " quota sieve" } (The !TLSv1 doesn't seem to be honored - I tried it with and without that. A problem for later.) Thanks for any help. Steve L

1 0

Deliver to Public Mailbox
by Chris 03 Mar '16

03 Mar '16

Dear All, I'd like dovecot-lda (deliver) to post a message to a public mailbox. It doesn't seem to work when I just use the -m parameter with the IMAP-Mailbox path, e.g. Public/info . What parameters are required? Do I have to change the headers with formail in any way? TIA! - Chris

1 1

Dovecot 2.2.21 - segfault
by Robert Blayzor 03 Mar '16

03 Mar '16

pid 31943 (dovecot), uid 0: exited on signal 11 (core dumped) dovecot --version 2.2.21 (5345f22) uname -a FreeBSD 10.3-BETA2 #0 r295966M: amd64 bt full #0 0x00000008008eb037 in t_push (marker=0x0) at data-stack.c:133 133 data-stack.c: No such file or directory. in data-stack.c (gdb) bt full #0 0x00000008008eb037 in t_push (marker=0x0) at data-stack.c:133 frame_block = (struct stack_frame_block *) 0x7fffffffb4e0 #1 0x000000080086a5ec in master_service_env_clean () at master-service.c:534 _data_stack_cur_id = 32767 value = 0x801471056 "TZ CORE_OUTOFMEM CORE_ERROR" #2 0x000000000040df88 in service_process_setup_environment (service=0x8014b11e0, uid=58537, hostdomain=0x801419960 “mta3.xxx.net") at service-process.c:234 No locals. #3 0x000000000040dd6d in service_process_create (service=0x8014b11e0) at service-process.c:322 uid_counter = 58537 process = (struct service_process *) 0x8008eb2f3 uid = 58537 hostdomain = 0x801419960 “mta3.xxx.net" pid = 0 process_forked = true #4 0x000000000040d7ff in service_accept (l=0x8014b1378) at service-monitor.c:299 service = (struct service *) 0x8014b11e0 #5 0x000000080090e57f in io_loop_call_io (io=0x80144e7e0) at ioloop.c:559 ioloop = (struct ioloop *) 0x801421080 t_id = 2 #6 0x0000000800911497 in io_loop_handler_run_internal (ioloop=0x801421080) at ioloop-kqueue.c:151 ctx = (struct ioloop_handler_context *) 0x801419880 events = (struct kevent *) 0x8014b9000 event = (const struct kevent *) 0x8014b9000 tv = {tv_sec = 42682, tv_usec = 705349} ts = {tv_sec = 42682, tv_nsec = 705349000} io = (struct io_file *) 0x80144e7e0 events_count = 67 ret = 1 i = 0 #7 0x000000080090eb0e in io_loop_handler_run (ioloop=0x801421080) at ioloop.c:607 No locals. #8 0x000000080090e92f in io_loop_run (ioloop=0x801421080) at ioloop.c:583 No locals. #9 0x000000080086a8bb in master_service_run (service=0x80141b140, callback=0) at master-service.c:640 No locals. #10 0x0000000000406558 in main (argc=3, argv=0x7fffffffb4c0) at main.c:888 set = (struct master_settings *) 0x801429110 error = 0x800ca9283 "H\203Ä ]Ã\017\037\200" doveconf_arg = 0x0 orig_info_callback = (failure_callback_t *) 0x8008ee880 <i_syslog_error_handler> orig_debug_callback = (failure_callback_t *) 0x8008ee880 <i_syslog_error_handler> foreground = false ask_key_pass = false i = 3 c = -1 doubleopts = 0x7fffffffb3a0 Current language: auto; currently minimal

2 2

Dovecot error symbol mysql_options, version libmysqlclient_16 not defined in file libmysqlclient.so.18
by Condor 03 Mar '16

03 Mar '16

Hello, Im using Dovecot version: 2.2.21 (5345f22) Here is my conf file: auth_debug = yes auth_mechanisms = plain login auth_socket_path = /usr/local/var/run/dovecot/auth-userdb auth_verbose = yes base_dir = /usr/local/var/run/dovecot/ debug_log_path = /var/log/dovecot.log default_login_user = nobody default_process_limit = 200 dict { driver = sql quota = mysql:/usr/local/etc/dovecot/dovecot-dict-sql.conf.ext } mail_debug = yes mail_location = maildir:/var/mailq/postmail/%d/%n/Maildir mail_privileged_group = vmail 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 envir onment mailbox date index ihave duplicate mime foreverypart extracttext 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 = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql } passdb { args = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { autocreate = Trash autocreate2 = Junk autocreate3 = Sent autocreate4 = Drafts autosubscribe = Trash autosubscribe2 = Junk autosubscribe3 = Sent autosubscribe4 = Drafts sieve = /var/mailq/postmail/%d/%n/.dovecot.sieve sieve_dir = /var/mailq/postmail/%d/%n/sieve/ sieve_global_dir = /usr/local/var/lib/dovecot/sieve sieve_global_path = /usr/local/var/lib/dovecot/sieve/default.sieve sieve_max_actions = 32 sieve_max_redirects = 15 sieve_quota_max_scripts = 20 } protocols = pop3 imap sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 } } service managesieve-login { inet_listener sieve { port = 4190 } service_count = 1 vsz_limit = 64 M } ssl_cert = </etc/postfix/ssl/certs/dovecot.pem ssl_key = </etc/postfix/ssl/private/dovecot.pem userdb { args = uid=1003 gid=1001 home=/var/mailq/postmail/%d/%n allow_all_users=yes driver = static } userdb { args = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol pop3 { pop3_uidl_format = %08Xu%08Xv } protocol lmtp { mail_plugins = " sieve" } protocol lda { mail_plugins = " sieve" } protocol imap { imap_max_line_length = 64 k mail_max_userip_connections = 200 mail_plugins = " autocreate" } protocol sieve { managesieve_implementation_string = Dovecot Pigeonhole } dovecot-sql. conf grep -v '^ *$#.*$\?$' dovecot-sql.conf.ext driver = mysql connect = host=localhost dbname=postfix user=xxx password=xxx default_pass_scheme = CRYPT password_query = SELECT username AS user, password FROM mailbox WHERE username = '%u'; I get follow error: dovecot: auth-worker: Error: dovecot/auth: relocation error: dovecot/auth: symbol mysql_options, version libmysqlclient_16 not defined in file libmysqlclient.so.18 with link time reference I delete all binary and libs and source code, download again and compile with option with-mysql and always got the same error when I start it: dovecot: auth-worker: Error: dovecot/auth: relocation error: dovecot/auth: symbol mysql_options, version libmysqlclient_16 not defined in file libmysqlclient.so.18 with link time reference Mar 3 16:50:56 mailcontrol dovecot: master: Error: service(auth-worker): command startup failed, throttling for 60 secs Mar 3 16:50:56 mailcontrol dovecot: auth-worker(3276): Fatal: master: service(auth-worker): child 3276 returned error 127 Mar 3 16:50:56 mailcontrol dovecot: auth: Error: auth worker: Aborted PASSV request for xxx@xxx: Worker process died unexpectedly I even check with ldd is there any banary that use libmysqlclient.16.so but did not found. ldd auth is linked libmysqlclient.so.18 => /usr/lib64/libmysqlclient.so.18 (0x00007fad84696000) I use kernel 4.4.3, gcc 5.3.0 $ gcc -v Reading specs from /usr/lib64/gcc/x86_64-slackware-linux/5.3.0/specs COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-slackware-linux/5.3.0/lto-wrapper Target: x86_64-slackware-linux Configured with: ../gcc-5.3.0/configure --prefix=/usr --libdir=/usr/lib64 --mandir=/usr/man --infodir=/usr/info --enable-shared --enable-bootstrap --enable-languages=ada,c,c++,fortran,go,java,lto,objc --enable-threads=posix --enable-checking=release --enable-objc-gc --with-system-zlib --with-python-dir=/lib64/python2.7/site-packages --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=gcc4-compatible --disable-libunwind-exceptions --enable-__cxa_atexit --enable-libssp --enable-lto --enable-install-libiberty --with-gnu-ld --verbose --enable-java-home --with-java-home=/usr/lib64/jvm/jre --with-jvm-root-dir=/usr/lib64/jvm --with-jvm-jar-dir=/usr/lib64/jvm/jvm-exports --with-arch-directory=amd64 --with-antlr-jar=/tmp/gcc/antlr-runtime-3.4.jar --enable-java-awt=gtk --disable-gtktest --disable-multilib --target=x86_64-slackware-linux --build=x86_64-slackware-linux --host=x86_64-slackware-linux Thread model: posix gcc version 5.3.0 (GCC) Mysql version: mysql Ver 15.1 Distrib 10.0.24-MariaDB, for Linux (x86_64) using readline 5.1 Glibc version 2.23 any one can help me to understand whats happaened ? HS

1 0

Found bug in quota-status + patch
by Thierry Coppey 03 Mar '16

03 Mar '16

Hello, I've found a bug in the quota-status util (Dovecot 2.2.21, and probably below): it always return OK (sufficient quota) because it fails to load the user properly. More specifically, the branch " if (quser == NULL) return 1; " in src/plugins/quota/quota-status.c:59 is always taken. (at least with postgresql backend, test your config with the (adapted) command below: printf "recipient=mailbox(a)example.com\nsize=10000000000\n\n" | nc inet:mailstore.example.com 12340 it should reject, unless you have no quota, or more than 10G). Therefore it is pointless to configure the quota-status service as described in http://wiki2.dovecot.org/Quota because of that bug: the mail would be always accepted from the client and rejected at the end of the (Postfix) processing by lda. It is possible to reject directly at SMTP level when the mailbox is full using Postfix and main.cf: smtpd_recipient_restrictions = ... reject_unauth_destination, ... check_policy_service inet:mailstore.example.com:12340 smtpd_end_of_data_restrictions = check_policy_service inet:mailstore.example.com:12340 However there remain a *small inconsistency* as lda will count the size of message including headers whereas smtpd_end_of_data_restrictions seems not to count them towards the message size (or additional headers might be added by other preprocessing e.g. antispam etc...) I propose the patch below to fix quota-status. Could an expert double-check that it doesn't have memory leaks? (it shouldn't but I'm not yet comfortable enough with Dovecot memory management). Best regards, Thierry C.

3 3

Dual certificate
by Jean-Baptiste Vignaud 03 Mar '16

03 Mar '16

Hello all; Is anyone knows if it's possible to have a dual certificate setup on dovecot like in postfix or apache ? i tried to add several crts in local name section : local_name imap.server.tdl { ssl_cert = <server_rsa_crt.pem ssl_key = <server_rsa_key.pem ssl_cert = <server_ecdsa_crt.pem ssl_key = <server_ecdsa_key.pem } but it seems that dovecot takes the last one (ecdsa) and that rsa cert is not used. to check if booth are working, i check with openssl: openssl s_client openssl s_client -connect imap.server.tdl:143 -starttls imap -servername imap.server.tdl -cipher ECDHE-RSA-AES128-GCM-SHA256 for rsa and openssl s_client openssl s_client -connect imap.server.tdl:143 -starttls imap -servername imap.server.tdl -cipher ECDHE-ECDSA-AES128-GCM-SHA256 for ecdsa In apache we have to duplicate the cert / key lines one for rsa, one for edcda. In postfix, we have some specific ecdsa conf keys. So is there a way to do the same in dovecot ?

3 3

Deleting / Removing users
by John Krug 03 Mar '16

03 Mar '16

i have a list of users that I’ve removed from LDAP and I want to delete their mail storage. sdbox Dovecot 2.2.15.8 I have mail messages in one location and indexes in another. Should I just rm -rf /messages/<username> rm -rf /indexes/<username> Thanks, JK ----------------------------------------------------------------------- John "JK" Krug System Administrator The University of Chicago | Laboratory Schools 1362 East 59th Street | Chicago, IL 60637 Phone: (773) 834-4476 jk(a)ucls.uchicago.edu <mailto:jkallo@ucls.uchicago.edu> | http://helpdesk.ucls.uchicago.edu _______________________________________________

2 3

Get mailbox from its guid through IMAP
by Peter Chiochetti 02 Mar '16

02 Mar '16

In the shell I'do: doveadm fetch -u bob mailbox mailbox-guid $box uid 1 Is there a way through IMAP to get the same? -- peter

2 1

user configuration question
by Eric Abrahamsen 02 Mar '16

02 Mar '16

I've been using mbsync to sync this email account to a local Dovecot installation. I used to use Gmail, through Google Apps, and a while ago switched the account to self-hosting. I didn't want to upload years' worth of old email to my old server, so I've had two accounts in my MUA: one talking to the local Dovecot account for the old emails, and a second talking directly to the server for the new emails. I'd like to sync the new account to Dovecot as well, and I'm having trouble wrapping my brain around how to configure the two side-by-side accounts in Dovecot (I know there are other solutions to this, but I'm also just trying to figure out how this works). What I don't grok is the exact effect of the different username fields in the passdb file, and how they combine with username_format. Right now my dovecot.conf has this: passdb { driver = passwd-file args = username_format=%u /etc/dovecot/passwd } userdb { driver = static args = uid=eric gid=users home=/home/eric/.mail/%d/%n username_format=%u default_fields = mail=maildir:/home/eric/.mail/%d/%n/mail } And /etc/dovecot/passwd: eric@ericabrahamsen.net:{PLAIN}password:eric@ericabrahamsen.net Say I want to keep my existing mail where it is, and have all the new mail go into ~/.mail/ericabrahamsen.net/eric-new/mail. Ie, when mbsync connects to the local Dovecot, it does so with the username eric-new(a)ericabrahamsen.net. Now, in Dovecot's conf, do I change the email address in the first field of /etc/dovecot/passwd, or the third field, or both? And, if it isn't too much trouble, what is the difference between the two? Thanks! Eric

1 0

Dsync induces redundant mail after rapid append/expunge repeatedly
by 潘信傑 02 Mar '16

02 Mar '16

I meet the problem about dsync with expunge. The problems is expunged mail would reappear after dsyncing and it is easily to reproduce. Environment Settings: - Two servers(serverA, serverB) both enabled plugin "*replication"* - And more detail get by "dovecot -n" show below Reproduce flow: - Run two processes pA and pB both would run in while loop - pA(All behavior is on Draft mailbox and all on serverA): - Clean "Draft" mailbox of userA - Run the following imap command of userA - imap save (save new mail to Draft) - imap delete (delete old mail on Draft) - imap expunge * - Check if draft only have one email (it would be failed in about 50 loops)* - pB(Send mail to serverB): - Send new mail to userA (which would be save in INBOX) It would be easier reproduce by increasing server loading. I have found something - T he expunge changes from server A in dsync connection don't send immediately, these expunge changes appear after 1~2 dsync connection over. - The replicated mail is generated from serverB and sync back to serverA so expunged mail reappeared. dovecot -n (ServerA) # 2.2.19: /etc/dovecot/dovecot.conf # OS: Linux 3.10.77 x86_64 ext4 auth_mechanisms = plain login default_internal_user = root default_login_user = dovecot default_vsz_limit = 0 disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u dsync_target_servers = tcps:10.13.23.139:24245 lda_mailbox_autocreate = yes mail_debug = yes mail_fsync = never mail_location = maildir:/var/spool/mail/%d/%-4.04i/%i/Maildir mail_max_userip_connections = 30 mail_never_cache_fields = * mail_plugins = " notify replication mail_log" 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 duplicate 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 { driver = pam } plugin { fts = lucene fts_autoindex = yes fts_lucene = whitespace_chars=@._/\~&,()[]" mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = uid box msgid size flags from subject } postmaster_address = postmaster@localhost protocols = imap pop3 lmtp imap pop3 sieve replication_dsync_parameters = -N -l 30 -U service aggregator { fifo_listener replication-notify-fifo { group = users mode = 0666 user = admin } unix_listener replication-notify { group = users mode = 0666 user = admin } } service doveadm { inet_listener { address = 10.13.23.136,127.0.0.1 port = 24245 ssl = yes } } service imap-login { inet_listener imap { address = 10.13.23.136,127.0.0.1 port = 143 } inet_listener imaps { address = 10.13.23.136,127.0.0.1 port = 993 ssl = yes } process_limit = 256 service_count = 0 } service indexer-worker { process_limit = 8 } service pop3-login { inet_listener pop3 { address = 10.13.23.136,127.0.0.1 port = 110 } inet_listener pop3s { address = 10.13.23.136,127.0.0.1 port = 995 ssl = yes } process_limit = 256 service_count = 0 } service replicator { unix_listener replicator-doveadm { mode = 0666 } } userdb { driver = passwd } protocol lda { mail_plugins = " notify replication mail_log sieve" } dovecot -n (ServerB) $ ./sbin/dovecot -n # 2.2.19: /etc/dovecot/dovecot.conf # OS: Linux 3.10.77 x86_64 auth_mechanisms = plain login default_internal_user = root default_login_user = dovecot default_vsz_limit = 0 disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u dsync_target_servers = tcps:10.13.23.136:24245 lda_mailbox_autocreate = yes mail_debug = yes mail_fsync = always mail_location = maildir:/var/spool/mail/%d/%-4.04i/%i/Maildir mail_max_userip_connections = 30 mail_never_cache_fields = * mail_plugins = " notify replication mail_log" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational reg ex imap4flags copy include variables body enotify environment mailbox date ihave duplicate 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 { driver = pam } plugin { fts = lucene fts_autoindex = yes fts_lucene = whitespace_chars=@._/\~&,()[]" mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = uid box msgid size flags from subject } postmaster_address = postmaster@localhost protocols = imap pop3 lmtp imap pop3 sieve replication_dsync_parameters = -N -l 30 -U service aggregator { fifo_listener replication-notify-fifo { group = users mode = 0666 user = admin } unix_listener replication-notify { group = users mode = 0666 user = admin } } service doveadm { inet_listener { address = 10.13.23.139,127.0.0.1 port = 24245 ssl = yes } } service imap-login { inet_listener imap { address = 10.13.23.139,127.0.0.1 port = 143 } inet_listener imaps { address = 10.13.23.139,127.0.0.1 port = 993 ssl = yes } process_limit = 256 service_count = 0 } service indexer-worker { process_limit = 4 } service pop3-login { inet_listener pop3 { address = 10.13.23.139,127.0.0.1 port = 110 } inet_listener pop3s { address = 10.13.23.139,127.0.0.1 port = 995 ssl = yes } process_limit = 256 service_count = 0 } service replicator { unix_listener replicator-doveadm { mode = 0666 } } userdb { driver = passwd } protocol lda { mail_plugins = " notify replication mail_log sieve" } Regards, Jay Pan

2 2

Setup changes 1.x to 2.x -- custom POP3 account handling required.
by Andrew McGlashan 02 Mar '16

02 Mar '16

Hi, Previously I did /special/ processing for some email accounts; if a particular file existed in the user's home directory, then I caused the account to use /var/mail/$USER file for POP -- otherwise it used IMAP. Now, because I adjusted the setup for POP only, IMAP still worked perfectly well. Some users have both POP and IMAP access for various reasons. The special POP processing was done using a shell script [1] in place of: /usr/lib/dovecot/pop3 - which in turn called the normal binary once setting up the environment. Now, I have been forced to upgrade my Debian from squeeze-lts to wheezy and the dovecot setup is quite different. How can I implement my /wrapper/ script for POP handling now? Here is my current setup with dovecot -n ... # 2.1.7: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-xen-amd64 x86_64 Debian 7.9 mail_location = maildir:~/Maildir namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Items" { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap pop3" service imap-login { inet_listener imap { port = 0 } } service pop3-login { inet_listener pop3 { port = 0 } } ssl = required ssl_cert = </etc/exim4/exim.crt ssl_key = </etc/exim4/exim.key userdb { driver = passwd } [1] This is the content of the original wrapper script: #!/bin/sh if [ -f $HOME/.use-mbox-for-pop3s ]; then export MAIL=mbox:$HOME/mail:INBOX=/var/mail/$USER export USER_INBOX=/var/mail/$USER if [ -f $USER_INBOX ] then export USER_INBOX_GROUP=$(stat -c %G $USER_INBOX) if [ $USER_INBOX_GROUP != $USER ] then ( date ls -l $USER_INBOX chown Debian-exim:$USER $USER_INBOX ls -l $USER_INBOX ) >> /var/log/usr-lib-dovecot--pop3-affinity.log fi fi else if [ -d $HOME/Maildir ]; then export MAIL=Maildir:$HOME/Maildir else export MAIL=mbox:$HOME/mail:INBOX=/var/mail/$USER fi fi # Finally execute the imap/pop3. If you use both, you'll need two scripts. # - this customization just for POP3S ... exec /usr/lib/dovecot/pop3 Thanks AndrewM

2 2

dsync issues due to Prefix difference?
by Mark Little 02 Mar '16

02 Mar '16

Hi everyone, I'm hoping I am just missing something obvious - but I cannot seem to get a one-way migration dsync working between two Dovecot servers because the Prefix configuration is different. I am doing a migration from our old Dovecot servers to some new cPanel based ones. Source: 2.2.15 Dest: 2.2.21 Here is the debug output for the sync: doveadm(root): Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm doveadm(root): Debug: Module loaded: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_sieve_plugin.so doveadm(testuser(a)example.ca): Debug: Effective uid=1322, gid=1322, home=/khstor3/khmail-mailboxes/l/li/example.ca/testuser doveadm(testuser(a)example.ca): Debug: Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:~/Maildir doveadm(testuser(a)example.ca): Debug: maildir++: root=/khstor3/khmail-mailboxes/l/li/example.ca/testuser/Maildir, index=, indexpvt=, control=, inbox=/khstor3/khmail-mailboxes/l/li/example.ca/testuser/Maildir, alt= doveadm(testuser(a)example.ca): Debug: Namespace : Using permissions from /khstor3/khmail-mailboxes/l/li/example.ca/testuser/Maildir: mode=0777 gid=default stdin: is not a tty dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: INBOX guid=f055ac07d79cad508a7a000075e38adc uid_validity=1353555159 uid_next=2085 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Junk guid=703a8b1d51ceab56f91e0000667eee40 uid_validity=1391566942 uid_next=1 subs=yes last_change=0 last_subs=1454100049 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Trash guid=9bee9f0f2aacb65039260000b171e44d uid_validity=1353555163 uid_next=25 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Drafts guid=4d03661058a0f1524f240000e9d81ad0 uid_validity=1391566936 uid_next=1 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Sent guid=99ee9f0f2aacb65039260000b171e44d uid_validity=1353555161 uid_next=4 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Remote mailbox tree: INBOX guid=6460141741cfab5643470000afb0d608 uid_validity=1454100291 uid_next=2064 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Remote mailbox tree: INBOX.Trash guid=6360141741cfab5643470000afb0d608 uid_validity=1454100290 uid_next=12 subs=yes last_change=0 last_subs=1454100289 dsync-local(testuser(a)example.ca): Debug: brain M: Remote mailbox tree: INBOX.Sent guid=6260141741cfab5643470000afb0d608 uid_validity=1454100289 uid_next=2 subs=yes last_change=0 last_subs=1454100289 dsync-remote(testuser(a)example.ca): Error: Couldn't find namespace for mailbox Junk I believe the problem is because on the source we have no prefix set, but on the destination it has INBOX as the prefix. I need to use dsync because we have many POP3 clients so I need to ensure the UIDL's are copied correctly. Here is the output from 'doveconf namespace': Source: namespace inbox { disabled = no hidden = no ignore_on_failure = no inbox = yes list = yes location = mailbox Drafts { auto = subscribe driver = special_use = \Drafts } mailbox Junk { auto = subscribe driver = special_use = \Junk } mailbox Sent { auto = subscribe driver = special_use = \Sent } mailbox "Sent Messages" { auto = no driver = special_use = \Sent } mailbox Trash { auto = subscribe driver = special_use = \Trash } order = 0 prefix = separator = subscriptions = yes type = private } Destination: namespace { disabled = no hidden = no ignore_on_failure = no inbox = yes list = yes location = mailbox Archive { auto = create autoexpunge = 0 comment = driver = special_use = \Archive } mailbox Archives { auto = no autoexpunge = 0 comment = driver = special_use = \Archive } mailbox Drafts { auto = subscribe autoexpunge = 0 comment = driver = special_use = \Drafts } mailbox Junk { auto = create autoexpunge = 0 comment = driver = special_use = \Junk } mailbox Sent { auto = subscribe autoexpunge = 0 comment = driver = special_use = \Sent } mailbox "Sent Messages" { auto = no autoexpunge = 0 comment = driver = special_use = \Sent } mailbox Trash { auto = subscribe autoexpunge = 0 comment = driver = special_use = \Trash } order = 0 prefix = INBOX. separator = subscriptions = yes type = private } If anyone could provide some assistance it would be greatly appreciated! Thanks, Mark

2 6

where is pop3_migration_ignore_missing_uidls=yes set?
by Leon Kyneur 02 Mar '16

02 Mar '16

While doing pop3 migrations with dsync I am getting an error: dsync(user(a)domain.net): Error: pop3_migration: 2 POP3 messages have no matching IMAP messages (first POP3 msg 2638 UIDL fb3d6f3299541e695a28585f5803ed1c) - set pop3_migration_ignore_missing_uidls=yes to continue anyway dsync(user(a)domain.net): Error: Exporting mailbox INBOX failed: Can't lookup pop3-uidl for UID=3252: POP3 UIDLs couldn't be synced Can't see this is doveconf -a so it's not a setting? - tried configuring it as a plugin setting but that didn't work... Where is the correct place to set this? TIA

2 1

Alternative storage backend for Dovecot
by Oleksandr Natalenko 01 Mar '16

01 Mar '16

Hi. We have corporate Dovecot setup with GlusterFS as file storage. We store maildirs on GlueterFS share, mounting it via NFS. Mounting share via native GlusterFS FUSE client introduces visible performance overhead. Also, NFS mount does not provide us with HA. That's why I have an idea to use GlusterFS C API to access maildirs share. I'd like to preserve maildir structure, but get access to it not via FS mount point but with GlusterFS C API calls. I've discovered that Dovecot source tree has src/lib-fs infrastructure with fs-posix implemented on top of it. Is that the right place to start from? GlusterFS C API calls are POSIX-like, so they could be easily used as substitutions for VFS ops. Could such a backend be implemented as separate plugin? Are there any examples of alternative storage backend to look at? Thanks. Regards, Oleksandr.

2 1

search problem dovecot 2.2.21 + fts - Solr
by Anderson Barbosa 01 Mar '16

01 Mar '16

Hello, Realized update dovecot on my server. Now the search is returning differently from the previous version bringing reference information of other messages . For example when doing a search for anderson.joao this new version of the dovecot dovecot 2.2.21 + fts - Solr response will be all email that has the word anderson and joao, instead of returning only items with the word anderson.joao. Before used version 2.2.18 + dovecot fts - Solr and the problem did not occur . For example practical test : Dovecot 2.2.18 # telnet SERVER 143 Trying SERVER... Connected to SERVER. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN] Zimbra IMAP4. a login conta(a)conta.com.br 1223456 a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAn a select INBOX * FLAGS (\Answered \Flagged \Deleted \Seen \Draft) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft \*)] Flags permitted. * 14 EXISTS * 0 RECENT * OK [UIDVALIDITY 1452548222] UIDs valid * OK [UIDNEXT 25] Predicted next UID * OK [HIGHESTMODSEQ 52] Highest a OK [READ-WRITE] Select completed (0.001 secs). a SEARCH text "anderson" * SEARCH 11 12 (2 found emails) a OK Search completed (0.265 secs). a SEARCH text "joao" * SEARCH 13 14 (2 found emails) a OK Search completed (0.003 secs). a SEARCH text "anderson.joao" * SEARCH (0 found emails) a OK Search completed (0.004 secs). a logout * BYE Logging out a OK Logout completed. Connection closed by foreign host. Dovecot 2.2.21 # telnet SERVER 143 Trying SERVER... Connected to SERVER. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN] Zimbra IMAP4. a login conta(a)conta.com.br 1223456 a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAn a select INBOX * FLAGS (\Answered \Flagged \Deleted \Seen \Draft) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft \*)] Flags permitted. * 14 EXISTS * 0 RECENT * OK [UIDVALIDITY 1452548222] UIDs valid * OK [UIDNEXT 25] Predicted next UID * OK [HIGHESTMODSEQ 52] Highest a OK [READ-WRITE] Select completed (0.000 + 0.000 secs). a SEARCH text "anderson" * SEARCH 11 12 (2 found emails) a OK Search completed (0.004 + 0.000 secs). a SEARCH text "joao" (2 found emails) * SEARCH 13 14 a OK Search completed (0.005 + 0.000 secs). a SEARCH text "anderson.joao" * SEARCH 11 12 13 14 *(4 found emails)* a OK Search completed (0.005 + 0.000 secs). a logout * BYE Logging out a OK Logout completed. Connection closed by foreign host. Even using characters Special "" \ scape, ' ' for an answer will always be all emails with the word anderson and joao. Checking the Changelog dovecot noticed que NAS versions Previous v2.2.20 and v2.2.19 certain changes with respect to fts . There Have Another way to Make Search for Exact Word In this new version to loft? -- Anderson Barbosa dos Santos Em todo o universo, nada existe de mais parecido com Deus que o silêncio. "Johanes Eckhart"

3 3

Inconsistent mdbox index while running doveadm altmove
by Ricardo Machini Barbosa 01 Mar '16

01 Mar '16

Hello, I was performing doveadm altmove for one account while this mailbox was being accessed. Dovecot version: 2.2.21 Mailbox format: mdbox Command: doveadm altmove -u user1(a)domain.com.br before 360d This command took about 5 minutes to finish and during the execution I found some log messages: Feb 25 19:57:51 dovecot: imap(user1(a)domain.com.br): Error: mdbox map /var/mail/user1/mdbox/storage/dovecot.map.index corrupted: Unexpectedly lost INBOX uid=77 map_uid=76 Feb 25 19:57:51 dovecot: imap(user1(a)domain.com.br): Internal error occurred. Refer to server log for more information. [2016-02-25 19:57:51] in=4798 out=1361819 deleted=0 expunged=0 trashed=0 Feb 25 19:57:51 dovecot: imap(user1(a)domain.com.br): Warning: fscking index file /var/mail/user1/mdbox/storage/dovecot.map.index Feb 25 19:58:15 dovecot: imap(user1(a)domain.com.br): Error: /var/mail/user1/mdbox/mailboxes/INBOX/dbox-Mails/dovecot.index reset, view is now inconsistent Feb 25 19:58:20 dovecot: imap(user1(a)domain.com.br): Error: /var/mail/user1/mdbox/mailboxes/Rascunhos/dbox-Mails/dovecot.index reset, view is now inconsistent After that these messages moved to alternate storage disappeared from the mailbox/IMAP but these files were all on alternative storage. I had to execute doveadm force-resync -u user1(a)domain.com.br INBOX to recovery this mailbox, but losing all e-mail's flags. I should do some kind of lock before running the command altmove ? Regards, Ricardo

2 1

Re: severe fork() problems with new dovecot server
by J. Niklas 01 Mar '16

01 Mar '16

On 01.03.2016 18:21, Dolf Schimmel wrote: > Recently I played around a little with cgroups where you can limit the max number of processes per cgroup. > Could it be that, perhaps, you've stumbled upon such a limit? > Systemd does contain all services by default in their own cgroup afaik, > so it could be that you're using it unknowingly. Yes, yes, \o/ ;-) #> systemctl status dovecot.service * dovecot.service - Dovecot IMAP/POP3 email server Loaded: loaded (/lib/systemd/system/dovecot.service; enabled; vendor preset: enabled) Drop-In: /etc/systemd/system/dovecot.service.d `-ulimits.conf Active: active (running) since Tue 2016-03-01 15:28:29; 4h 24min ago Main PID: 10098 (dovecot) Tasks: 204 (limit: 512) CGroup: /system.slice/dovecot.service There ist my "512". The way of systemd, ignoring all the config stuff that has been there for decades while inposing its own, complex and very sparsely documented ruleset on top is beginning to seriously annoy me. At least I would have expected some sort of syslog message. Just for the records, this can be changed by adding e.g. TasksMax=4096 to the /etc/systemd/system/dovecot.service.d/ulimits.conf I cited in my OP. Now I'll have to wait and see how things will evolve tomorrow. Thank you so much for the great hint! -- kind regards, Jon

2 1

severe fork() problems with new dovecot server
by J. Niklas 01 Mar '16

01 Mar '16

Hi all, I am getting to you because I am pretty desperate by now. Please read this and share your ideas. I set up a new Mail server with roughly 750 active accounts on it, based on the usual dovecot+postfix+amavis+sql based vmail setup. This is not the first time I did something like this, but admittedly my largest setup so far. I took my time to setup everything pretty straight and stable and migrated all accounts in time with almost no glitches using imapc and pop3c. Things started out smoothly - until the first business morning when the log suddenly began to pop messages like these: dovecot: master: Error: service(imap): fork() failed: Resource temporarily unavailable dovecot: master: Error: service(pop3): fork() failed: Resource temporarily unavailable The error is not confined to a certain service. There are no other messages in dmesg or syslog which could help in closing in on the root cause. The server always runs at load around 0.4 to 0.5 and has plenty of RAM and Disk, too. Of course I checked resource limits and cranked up everything I could possibly think of to numbers that should easily suffice: /etc/security/limits.conf: daemon soft nproc 2048 daemon hard nproc 3128 dovecot soft nproc 2048 dovecot hard nproc 3128 vmail soft nproc 2048 vmail hard nproc 3128 vmail soft nofile 32768 vmail hard nofile 49152 /etc/systemd/system/dovecot.service.d/ulimits.conf: [Service] LimitNOFILE=65534 However, all my attempts on resolving the problem were futile so far. To work around the problem I implemented a log watcher which constantly looks for the fork failure and dumps some debug info before restarting dovecot to make the problem "go away" - until dovecot hits whatever barrier there is again. Here are today's numbers I gathered from this: > forkdump_03-01_09-42: pop=3, imap=446, all=503, postfix:22, sys: 716 > forkdump_03-01_10-09: pop=9, imap=444, all=510, postfix:28, sys: 741 > forkdump_03-01_10-42: pop=5, imap=450, all=507, postfix:25, sys: 748 > forkdump_03-01_11-18: pop=5, imap=451, all=512, postfix:29, sys: 757 > forkdump_03-01_11-48: pop=3, imap=474, all=511, postfix:37, sys: 765 > forkdump_03-01_12-23: pop=7, imap=444, all=511, postfix:22, sys: 752 > forkdump_03-01_12-53: pop=3, imap=444, all=503, postfix:24, sys: 747 > forkdump_03-01_13-21: pop=3, imap=458, all=504, postfix:31, sys: 766 > forkdump_03-01_13-41: pop=4, imap=451, all=505, postfix:23, sys: 755 > forkdump_03-01_14-35: pop=5, imap=436, all=502, postfix:31, sys: 768 > forkdump_03-01_14-59: pop=3, imap=445, all=501, postfix:27, sys: 764 > forkdump_03-01_15-28: pop=6, imap=452, all=507, postfix:25, sys: 769 There you see the number of pop3 and imap childs in the process list as well as the total number of all dovecot processes and all postfix processes, summarized directly after the fork problem appears in the log. The last column is the sum of all processes in the system. Here is a run where the numbers are measured as the server approaches the last entry in the list above. > 15:26:15: pop=3, imap=432, all=485, VSZ: 14353k, postfix:30, sys: 749 > 15:26:30: pop=4, imap=435, all=490, VSZ: 14497k, postfix:30, sys: 754 > 15:26:45: pop=3, imap=439, all=492, VSZ: 14560k, postfix:28, sys: 754 > 15:27:00: pop=3, imap=444, all=497, VSZ: 14711k, postfix:28, sys: 760 > 15:27:15: pop=4, imap=442, all=496, VSZ: 14673k, postfix:25, sys: 756 > 15:27:30: pop=4, imap=444, all=497, VSZ: 14721k, postfix:25, sys: 757 > 15:27:46: pop=3, imap=446, all=498, VSZ: 14756k, postfix:25, sys: 758 > 15:28:01: pop=3, imap=446, all=497, VSZ: 14718k, postfix:24, sys: 756 > 15:28:16: pop=3, imap=455, all=507, VSZ: 15018k, postfix:25, sys: 767 > 15:28:18: pop=3, imap=455, all=507, VSZ: 15018k, postfix:25, sys: 767 > 15:28:20: pop=3, imap=452, all=504, VSZ: 14931k, postfix:25, sys: 764 ---- service(pop3): fork() failed: Resource temporarily unavailable ---- > 15:28:22: pop=4, imap=452, all=505, VSZ: 14954k, postfix:25, sys: 770 > 15:28:24: pop=4, imap=452, all=505, VSZ: 14954k, postfix:25, sys: 770 > 15:28:26: pop=4, imap=451, all=504, VSZ: 14925k, postfix:25, sys: 769 > 15:28:28: pop=5, imap=451, all=506, VSZ: 14980k, postfix:25, sys: 771 ---- dovecot restart complete ---- > 15:28:30: pop=3, imap=11, all=22, VSZ: 485k, postfix:25, sys: 282 > 15:29:00: pop=4, imap=65, all=83, VSZ: 2293k, postfix:26, sys: 344 > 15:29:31: pop=3, imap=91, all=111, VSZ: 3129k, postfix:27, sys: 373 It always seems to happen shortly after the number of dovecot processes goes beyond 500. The VSZ column is the VSZ sum of all dovecot procs. The number of files opened by vmail (lsof -u <vmailuid> | wc -l) at that moment usually is between 13k and 15k. sysctl fs.file-nr mostly is around 16k total but the system limit is set way higher (at 1532853) However, as you can see in the following dump, there is no process_limit or whatever being set to 500 or 512 or similar. # --------- su vmail -c "ulimit -Ha:" --------------- core file size (blocks, -c) unlimited data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 60026 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 49152 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) unlimited cpu time (seconds, -t) unlimited max user processes (-u) 3128 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited # ---------------- dovecot -n (mildly anonymized) --------------- # 2.2.18: /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.8 (0c4ae064f307+) # OS: Linux 4.4.0-8-generic x86_64 Ubuntu Xenial Xerus (development branch) xfs auth_cache_negative_ttl = 0 auth_cache_size = 50 M auth_mechanisms = plain login default_client_limit = 10000 dict { quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } hostname = my.mail.host imap_client_workarounds = delay-newmail lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes lda_original_recipient_header = X-Original-To listen = * mail_location = sdbox:/mailsrv/users/%d/%u mail_plugins = quota notify mail_log fts 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 index ihave duplicate namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { fts_autoindex = yes quota = dict:User quota::proxy::quota sieve = file:~/sieve;active=~/.dovecot.sieve sieve_dir = ~/sieve stats_refresh = 30s stats_track_cmds = yes } postmaster_address = postmaster(a)my.mail.host protocols = " imap lmtp sieve pop3" service anvil { client_limit = 11227 } service auth { client_limit = 11324 unix_listener /mailsrv/spool/private/auth { group = postfix mode = 0666 user = postfix } } service dict { unix_listener dict { mode = 0600 user = vmail } } service imap-login { process_limit = 10000 process_min_avail = 5 service_count = 0 vsz_limit = 2 G } service imap { process_limit = 2048 vsz_limit = 2 G } service lmtp { inet_listener lmtp { address = 127.0.0.1 port = 24 } } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { process_limit = 1024 process_min_avail = 3 service_count = 0 vsz_limit = 2 G } service pop3 { process_limit = 1024 } service stats { fifo_listener stats-mail { mode = 0600 user = vmail } } ssl_cert = </etc/ssl/local/my.mail.host.crt.pem ssl_key = </etc/ssl/local/my.mail.host.key.pem userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes protocol lmtp { mail_plugins = quota notify mail_log fts quota sieve } protocol lda { mail_plugins = quota notify mail_log fts sieve } protocol imap { mail_max_userip_connections = 15 mail_plugins = quota notify mail_log fts imap_quota stats imap_stats } protocol pop3 { mail_max_userip_connections = 15 } # ------------ end dovecot -n ------------- So, here I am, out of ideas for the moment. Do you have any? -- kind regards, Jonathan

1 0

What happened to dovecot.fi?
by Pieter Koorts 01 Mar '16

01 Mar '16

Hi All, Any news about what happened to dovecot.fi ? Is enterprise or the S3 backend plugin still available? Reason for asking is every attempt to access the dovecot.fi website shows it as down and has done for a while. Pieter

2 1

Returning custom autoexpunge for user's INBOX
by Tom Johnson 01 Mar '16

01 Mar '16

I want to be able to have custom autoexpunge settings for different users. I have it working for various folders (draft, junk, trash), but I can't seem to get it working for the user's primary inbox. In my user_query (I'm using mysql), I'm returning entries like this in the userdb_import field: namespace/inbox/mailbox/autoexpunge=5d namespace/inbox/mailbox/Drafts/autoexpunge=5d namespace/inbox/mailbox/Junk/autoexpunge=5d namespace/inbox/mailbox/Trash/autoexpunge=5d And everything works fine for Drafts, Junk, and Trash, but not for the main inbox. The logs show: Debug: Unknown userdb setting: plugin/namespace/inbox/mailbox/autoexpunge=5d I've also tried variations, trying to get the namespace correct for the main inbox, but they all get the same "Unknown userdb setting" error: namespace/inbox/mailbox/autoexpunge=5d namespace/inbox/mailbox/inbox/autoexpunge=5d namespace/inbox/mailbox/Inbox/autoexpunge=5d namespace/inbox/mailbox/INBOX/autoexpunge=5d I suspect I'm just giving the wrong namespace for the primary inbox. What's the right way to do this? Tom

2 2

UnicodeData
by Vincent Dahmen 29 Feb '16

29 Feb '16

Hey guys, there seem to be a problem with wget and/or the unicode webserver. During the make process there are several files wich are download from the unicode server. I can access them manually but both curl and wget failing to get it. Are they any other mirrors or anyone else expiring this bug? Greetings

2 3

Re: sieve_extprograms - double linebreaks at filtering
by Hajo Locke 29 Feb '16

29 Feb '16

Hello, Am 09.09.2015 um 13:30 schrieb Stephan Bosch: > > > Op 9-9-2015 om 12:37 schreef Hajo Locke: >> Hello, >> >> >> Am 09.09.2015 um 11:26 schrieb Stephan Bosch: >>> >>> >>> Op 8-9-2015 om 13:10 schreef Hajo Locke: >>>> Hello List, >>>> >>>> i have a problem when using sieve-plugin sieve_extprograms. I use >>>> dovecot 2.2.18 and bundled pigeonhole 0.4.6 (Ubuntu 14.04.3 LTS) >>>> >>>> i have enabled sieve_extprograms and vnd.dovecot.filter to send >>>> mail to user-defined script and get changed content back. >>>> My script previously was used with procmail and is working fine. >>>> Using same script with vnd.dovecot.filter leads to odd behavior. >>>> I already found out the problem itself: >>>> By sending Mailcontent to filter-programm it seems that >>>> sieve/sieve_extprograms is adding additional linebreaks to every >>>> line of complete mail. >>>> Please see this image to clarify: >>>> http://r31i.imgup.net/header8d56.jpg?l=de >>>> Every lineending got additional windows-lineendings, which leads to >>>> problems with processing scripts. >>>> Piping mails by procmail to same script is working without >>>> problems, because this mails are recieved "clean" without the "^M". >>> >>> Well, the specified format for an internet message like e-mail has >>> CRLF line endings everywhere. That's why this happens now: >>> >>> http://hg.rename-it.nl/dovecot-2.2-pigeonhole/file/5df1b6d72ec2/src/plugins… >>> >>> >>> But maybe that is not such a good idea in a UNIX environment. I >>> think I can just make it configurable. >> >> ahh, there it is. i think just commenting out this line in my sources >> will result in some errors. Is there a possibility for me to make a >> quickfix in my sources? (use other function or something like that) > > You can replace it with the i_stream_create_lf() function, which > enforces LF rather than CR+LF, which would be what you need. Unfortunately i have to continue this issue. During my last updates this problem is occured again. This are my versions: # 2.2.21 (): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.11 (6ddf62b87f60+) # OS: Linux 3.13.0-77-generic x86_64 Ubuntu 14.04.4 LTS I tried to configure the linebreaks in my plugin section of /etc/dovecot/dovecot.conf by: sieve_extprograms_input_eol = lf But it seems to have no effect. Is this configured the right way or i have to use 0.4.12? Currently it looks like this: plugin { sieve = ~/sieve/.dovecot.sieve sieve_before = ~/sieve_before/.dovecot_before.sieve sieve_after = ~/sieve_after/.dovecot_after.sieve sieve_plugins = sieve_extprograms sieve_extensions = +vnd.dovecot.pipe +vnd.dovecot.filter +vnd.dovecot.execute +editheader sieve_pipe_bin_dir = /usr/local/bin/ sieve_filter_bin_dir = /usr/local/bin/ sieve_dir = ~/sieve sieve_global_dir = /etc/dovecot/sieve/ sieve_extprograms_input_eol = lf } > > Regards, > > Stephan. > > Thanks, Hajo

2 2

Queries are not being sent to solr when search on server issued via imap client.
by ralph.jones＠modolingo.de 29 Feb '16

29 Feb '16

I traced the network communication with the solr server with tcpdump: sudo tcpdump -i any -A -vvv port 8080 I logged into the imap server via telnet (actually openssl) and issued the command ". search body <string>". About 20 results were returned within about half a second. Nothing was seen in tcpdump. When I issue "doveadm search box <string>", I can see the search string in the output of tcpdump and also in the solr logs. Solr seems to have been initialized correctly, in that when I issue a query via curl, I receive the correct results. I am using: dovecot 2.2.13 (debian jessie) libsolr-java 3.6.2+dfsg-5 relevant config: mail_plugins = fts fts_solr acl virtual plugin { fts = solr fts_solr = url=http://localhost:8080/solr/ debug ... }

2 1

Dovecot sieve - How to check which username a mail is being delivered to?
by Yannik Sembritzki 27 Feb '16

27 Feb '16

Hi everyone, I am looking for a way to check which mailbox an email is being delivered to in a global sieve filter. After not being able to find some kind of variable that is populated by dovecot automatically, I tried to use the `Delivered-To` header. I tried a check like this: header :is "delivered-to" "<user(a)domain.org>" Unfortunately, this does not only match the first occurence of the header (which can be assumed is added by dovecot), but any occurence of this header in the email, which could be added due to previous deliveries and forwards, or just cause of malice. Is there any way to achieve this? Best regards, Yannik

2 3

Assertion crash: (idx * array->element_size < array->buffer->used)
by Joseph Tam 27 Feb '16

27 Feb '16

Log message: Traceback is hex gibberish: if symbolic traceback is needed, I'll recompile with "cc -g" and retest. Panic: file ../../../src/lib/array.h: line 219 (array_idx_i): assertion failed : (idx * array->element_size < array->buffer->used) (Similar to http://dovecot.org/pipermail/dovecot/2015-February/099771.html) IMAP command that provoked the crash: x1 FETCH 3 (BODY) Dovecot version: 2.2.19, Solaris10 (I don't think doveconf -n is relevant, but willing to provide if needed). It seems like a mailbox index issue. Removing, then recreating the indices gets rid of the crash. I saved these indices if it will help. Joseph Tam <jtam.home(a)gmail.com>

1 0

Different Quotas For Public Namespace
by Chris 26 Feb '16

26 Feb '16

Dear All, are different quotas for public namespace folders possible? They're in the same namespace. If I got it right, the wiki says there's one quota per namespace only? - Chris

2 2

Block public namespace mail when quota exceeded
by Chris 26 Feb '16

26 Feb '16

Dear All, is it possible to temporarily reject mails, when quota of public namespace subfolder is exceeded? I'd check folder size with a cronjob. Dovecot is using a system user, so I guess blocking post and insert in ACL isn't a solution? I don't want to set the folder to read-only, that users can still delete mails. Thank you in advance. - Chris

2 2

Question: Directory hashing to support large domains | Dovecot & MySQL
by Altin Ukshini 26 Feb '16

26 Feb '16

Hello there, I have a postfix + dovecot + mysql installation in an ubuntu server. Virtual users and domains in a small mysql db that I manage via a web based mailadmin I wrote myself. The mysql db I'm talking about has a qmail structure that used to be managed by qmailadmin and worked with vpopmail. As for information, I cannot move to a different structure (exc postfixadmin/postfix) for many reasons, so I was forced to stick with it and configure postfix and dovecot to read that structure... If you may know, qmail (depends on the configuration) uses a directory hashing like /home/vpopmail/DOMAIN/P/7/USERNAME (something similar) in order to manage large domains, and this is handled by vpopmail. Please refer to these two links for details: - http://free.acrconsulting.co.uk/email/qmh.html - https://sourceforge.net/p/vpopmail/mailman/message/2710408/ I saw that dovecot uses something similar which I found in dovecot documentation : http://wiki2.dovecot.org/MailLocation#Directory_hashing Unfortunately, I cannot find more details, so I'd be thankful if you help me out with the following: By reading the documentation, I can tell that I can use the dir hashing variables in my dovecot configuration. But, in my case, I get the directory path from my mysql db via dovecot sql user_query - not from mail_location variable in 10-mail.conf Therefore if in case of a first received email for a user: dovecot checks in the db, gets the path and creates the maildir from the given path. In case the maildir column is empty, it fails, and it also fails to authenticate... So, can dovecot write to mysql? I would like to use directory hashing of dovecot, but from what I can find: If dovecot has mail_location variable set to do the dir hashing, it will not then go and add the created path in my mysql db. While if I try to implement something similar from my web gui application, I'd probably have to rewrite the algorithm that does this!? Can anyone help me figure out what's the best way to implement this? Thank you very much in advance for your help! Best, Altin Ukshini

1 0

[Feature Request] doveadm option to return number of messages acted upon
by Haravikk 26 Feb '16

26 Feb '16

So I have a script for handling my specific archive and expunge needs, but it’d be nice to be able to track how many messages are being affected. Currently I’m doing it by firing the same search queries into doveadm search and counting the lines of the result with wc -l, but that’s not a very pretty solution. While I’m mostly doing it out of interest on a personal server, I can’t imagine it’s a very scalable way to do it if you wanted to gather some kind of metrics for example. What I think would make sense would be for relevant doveadm commands such as move, expunge (probably purge too) and others I haven’t thought of to have a new option that, if enabled, will cause the command to output the number of messages affected as the final line of output (most of these commands don’t have any output anyway). A doveadm count command could also be a convenient, more efficient, alternative to doveadm search | wc -l.

2 1

Replication between two ISPCOnfig servers
by Otto Saayman 26 Feb '16

26 Feb '16

Hello I have set up two servers, one master and one slave, using ISPConfig. I have been using rsync to synchronise mails between the two machines, but this has some unstable results. I had a look at setting up replication: http://wiki.dovecot.org/Replication When I run the command, doveadm user '*', only two users are returned. So when I run this command: doveadm replicator replicate \* I get: 2 users updated I run this command: doveadm sync -u [e-mail address] tcp:[2nd/ slave dovecot server IP address] Here I can input any valid e-mail address in the ISPConfig MySQL database and it works. How do I tell the dovecote server to replicate all the users configured in the MySQL database it uses when it handles logins via POP/ IMAP, all of which is working fine? Is there a command I need to run at a set interval via cron to synchronise the two machines' mailboxes, which are identical in every way except the mails the users' mailboxes contain? OR Is there a way that I can instruct the two machines to keep each other's user mailbox contents "up to date"? The main idea is to have a hot backup of my "main" dovecot server and also to enable a lower mail priority for the second server so that mails are still received when the main server becomes busy, or is taken offline for some reason. Any help, or link to a HOWTO would be appreciated. -- Best Regards Otto Saayman

2 1

Checking index sanity
by Emmanuel Dreyfus 25 Feb '16

25 Feb '16

Hello We experienced corrupted dovecot indexes, probably caused by a server crash. This does not cause a lot of harm, just annoyance. For instance, LMTP raises an assertion during delivery, which causes mail to multiple recipients e-mail to remain in the queue if a single of them hits a corrupted index. The workaround for now is to detect the situation in the logs and to remove corrupted indexes when the problem arise. A better fix would be to sanity check all user's index on startup. Is there a command line tool to do this? -- Emmanuel Dreyfus manu(a)netbsd.org

1 0

VS: Re: SQLite driver and auth-worker credentials
by Aki Tuomi 24 Feb '16

24 Feb '16

this is probably something that ought to be fixed. Read only scenario for auth/userdb is quite plausible. ---Aki TuomiDovecot oy-------- Alkuperäinen viesti --------Lähettäjä: Lev Serebryakov <lev(a)serebryakov.spb.ru> Päivämäärä: 24.2.2016 23.32 (GMT+02:00) Saaja: james(a)lottspot.com Kopio: dovecot(a)dovecot.org Aihe: Re: SQLite driver and auth-worker credentials Hello James, Wednesday, February 24, 2016, 11:17:12 PM, you wrote: >> But system should assign all secondary GIDs to effective UID? > separate 'group =' directive in addition to the 'user =' directive > (http://wiki2.dovecot.org/Services) Oh, I missed this one, thank you -- Best regards, Lev mailto:lev@serebryakov.spb.ru

1 0

SQLite driver and auth-worker credentials
by Lev Serebryakov 24 Feb '16

24 Feb '16

I want to use SQLite database as storage for auth and user databases. I've encountered two problems here: (1) There is no way to open SQLite database read-only (via sqlite3_open_v2() call with SQLITE_OPEN_READONLY flag). It looks bad. I don't need (and want) to give dovecot rights to write to this database. (2) I've created system group "hostingdb", added "dovecot" user to it and gives 660 rights to database file, but still "auth-worker" could not open database and complains to log file. Now I'm set "user = root" for auth-worker, but I don't like it! Why auth-worker doesn't belong to "hostingdb" group? -- // Black Lion AKA Lev Serebryakov

2 4

Script dovecot ACLs, Quota and doveadm
by Chris 24 Feb '16

24 Feb '16

Dear All, I'd like to set a) Quota for mailboxes in private and public namespace b) ACLs for both. What's the easiest way to do this? Do I have to call doveadm for every mailbox (private and public)? Is it required to provide a username to doveadm? Can I use the same user for all if it is defined in global ACLs? For Cyrus there are perl modules which have the same functions as cyradm. Is there something like this for dovecot? Are there any modules available? Haven't found anything in CPAN. - Chris

1 0

Streaming MOVE commands
by gallego＠cri.ensmp.fr 24 Feb '16

24 Feb '16

Dear Dovecot devs, is streaming multiple MOVE commands by clients allowed? I am getting duplicated messages with the GNUS mail client, the interchange looks like this: *stream two moves to different folders* > 9019 UID MOVE 4062,4066,4068 "folder0" > 9020 UID MOVE 4063:4064,4067,4069:4072 "folder1" *the messages are copied* > * OK [COPYUID 1424475218 4062,4066,4068 376:378] Moved UIDs. > * OK [COPYUID 1424475231 4063:4064,4067,4069:4072 26:32] Moved UIDs. *however expunge fails to clean 4063, 4064, and 4067* > * VANISHED 4062,4066,4068:4072 thus 4063, 4064, and 4067 end both in inbox and folder1 producing duplicate messages (more details at [1]). At the GNUS mailing list, we were wondering about what should be the correct reading of RFC6851. Version and config information below. Best regards, Emilio [1] More details in the thread http://permalink.gmane.org/gmane.emacs.gnus.general/86813 [2] Version $ /usr/sbin/dovecot --version 2.2.13 [3] Config $ /usr/sbin/dovecot -n # 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-amd64 x86_64 Debian 8.3 ext4 mail_location = maildir:/home/%u/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 ihave 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 { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap sieve" ssl_cert = ... ssl_key = ... userdb { driver = passwd }

3 6

Automatically inferring %d on multi-domain virtual install ?
by Gabriel L. Somlo 24 Feb '16

24 Feb '16

Hi, I'm trying to allow domain-less logins for a multi-domain virtual IMAP server, and wondering if I can automatically infer the domain (value of variable %d) from the local IP (%l) or the hostname used by the client when connecting to my server. Let's say I have two host names: mail.foo.org (10.0.0.100) and mail.bar.com (10.0.0.200), with forward and reverse DNS configured to resolve A and PTR records in either direction. Let's also say I have 10.0.0.100 and 10.0.0.200 set up as secondaries on my server's loopback interface, and routing is set up to bring client traffic to me for both of those IP addresses. The relevant bits of my dovecot.conf are: ---%<------------------------------------------------------------------ mail_location = maildir:/var/lib/vmail/%d/%n passdb { driver = passwd-file args = /var/lib/vmail/etc/postfix/userdb } userdb { driver = static args = uid=dovenull gid=dovenull home=/var/lib/vmail/%d/%n } ---%<------------------------------------------------------------------ And my userdb passwd-file right now includes: ---%<------------------------------------------------------------------ user1@foo.org:{PLAIN}user1foo user2@foo.org:{PLAIN}user2foo user1@bar.com:{PLAIN}user1bar user2@bar.com:{PLAIN}user2bar ---%<------------------------------------------------------------------ Right now, user1(a)foo.org must configure their imap client like so: IMAP server: mail.foo.org username: user1(a)foo.org password: user1foo I would like to require this (and other) users to only have to set: IMAP server: mail.foo.org username: user1 password: ... and have dovecot somehow infer the "@foo.org" domain based on the fact that the connection was made to 10.0.0.100, which is mail.foo.org, and therefore the domain can *only* be "@foo.org". I could start out by splitting my user database into two files: userdb.foo.org ---%<------------------------------------------------------------------ user1:{PLAIN}user1foo user2:{PLAIN}user2foo ---%<------------------------------------------------------------------ userdb.bar.com ---%<------------------------------------------------------------------ user1:{PLAIN}user1bar user2:{PLAIN}user2bar ---%<------------------------------------------------------------------ ... then modify dovecot.conf's passdb setup like so: ---%<------------------------------------------------------------------ passdb { driver = passwd-file args = /var/lib/vmail/etc/postfix/userdb.%d } ---%<------------------------------------------------------------------ ... but how would I insure that %d is set to the proper value based on e.g. a reverse lookup of %l, which, in foo.org's case would be 10.0.0.100, and resolve to mail.foo.org, and *somehow* that would match %d == "@foo.org" ? Is this even possible in the first place, or am I just being too fussy about the aesthetics of my users' imap client config files ? :) :) Thanks much, --Gabriel

5 9

Dovecot + Ceph Cluster Sizing
by Michele Soragni 24 Feb '16

24 Feb '16

Hi all. We are searching for information about how to size dovecot servers in a clustered architecture (dovecot + postfix + roundcube + mysql). We need to migrate mailboxes from an old Exchange installation: 60k mailbox 900 GB total storage 14 MB/mailbox About 133 email/mailbox Low usage: about 2k simultaneous imap/pop3 connections This is how we are thinking to build our new architecture 3 x Dell R630 or R530 servers with 6x300SAS disks for Ceph storage with 1 replica . Total storage = 2,5 TB for mailboxes 3 x Dell R630 or R530 with 2x CPU 6core,64GB RAM, 4x 300SAS disks hosting the following VMs in a VMware cluster: - 3 x VM Dovecot - 3 x VM Postfix - 3 x VM Roundcube webmail - 3 x VM MySQL All VMs are behind a balancer All OS disks are on local storage Dovecot VMs share Ceph storage with OCFS2 filesystem for the mailboxes. I'd like to have some hints about CPU and memory for Dovecot VMs. 2 vCPU and 8 GB RAM each sould be enough? Is there a way to calculate this? Do you think the storage performance could be a problem using Ceph + OCFS2? Is Ceph + XFS + Dsync replication a better choice? Thanks! Michele

1 0

Segfault using doveadm dsync
by fabio.onorini＠secoges.com 24 Feb '16

24 Feb '16

I'm trying to migrate a imap mailbox from dovecot 1.2.15 to a new imap server with dovecot 2.2.13. I would preserving the IMAP UIDs and POP3 UIDLs. So I'm using doveadm backup command but after folders analyze, command return segmentation fault. Any hint? GDB result: sync(easymail): Debug: brain S: Deleting mailbox 'Bozze' (GUID f0836f3222c335cfa383cb38ff0e3183): UIDNEXT is too high (9 > 1) dsync(easymail): Debug: brain S: Deleting mailbox 'Cestino' (GUID cd0edec22e40323d878a39dc8e432e5a): UIDNEXT is too high (628 > 1) dsync(easymail): Debug: brain S: Deleting mailbox 'INBOX' (GUID c92f64f79f0d1ed01e6d5b314f04886c): UIDVALIDITY changed (1456239585 -> 1456310264) dsync(easymail): Debug: brain S: Deleting mailbox 'Modelli' (GUID f0933f8b90e6eaf3a00a0220b173f3b4): UIDNEXT is too high (2 > 1) dsync(easymail): Debug: brain S: Deleting mailbox 'Sent' (GUID 7d3c7eaa71cdf47ee8a1192687cda8cd): UIDNEXT is too high (39 > 1) Program received signal SIGSEGV, Segmentation fault. imapc_client_mailbox_cmd (box=0x0, callback=callback@entry=0x7ffff76d7140 <imapc_simple_callback>, context=context@entry=0x7fffffffe2d0) at imapc-client.c:351 351 imapc-client.c: No such file or directory. (gdb) bt full #0 imapc_client_mailbox_cmd (box=0x0, callback=callback@entry=0x7ffff76d7140 <imapc_simple_callback>, context=context@entry=0x7fffffffe2d0) at imapc-client.c:351 cmd = <optimized out> __FUNCTION__ = "imapc_client_mailbox_cmd" #1 0x00007ffff76d7915 in imapc_mailbox_noop (mbox=mbox@entry=0x5555558049e0) at imapc-storage.c:154 cmd = <optimized out> sctx = {client = 0x5555557e89b0, ret = -2} #2 0x00007ffff76d5c18 in imapc_mailbox_sync_init (box=0x5555558049e0, flags=(MAILBOX_SYNC_FLAG_FULL_READ | MAILBOX_SYNC_FLAG_FIX_INCONSISTENT)) at imapc-sync.c:476 mbox = 0x5555558049e0 list = <optimized out> capabilities = <optimized out> changes = false ret = 0 #3 0x00007ffff76e9289 in mailbox_sync_init (box=0x5555558049e0, flags=(MAILBOX_SYNC_FLAG_FULL_READ | MAILBOX_SYNC_FLAG_FIX_INCONSISTENT)) at mail-storage.c:1677 _data_stack_cur_id = 3 ctx = <optimized out> #4 0x00007ffff76e93d7 in mailbox_sync (box=box@entry=0x5555558049e0, flags=<optimized out>, flags@entry=MAILBOX_SYNC_FLAG_FULL_READ) at mail-storage.c:1725 ctx = 0x555555804ea8 status = {sync_delayed_expunges = 0} #5 0x00007ffff7715bab in mailbox_expunge_all_data (box=0x5555558049e0) at index-storage.c:648 ctx = 0x7ffff7714e57 <index_storage_mailbox_open+615> t = 0x5555558049e0 mail = 0x7fffffffe4b4 search_args = 0x7fffffffe558 #6 index_storage_mailbox_delete (box=0x5555558049e0) at index-storage.c:701 metadata = {guid = "\264\344\377\377\377\177\000\000\000\000\000\000\000\000\000", virtual_size = 140737488348504, cache_fields = 0x555555807258, precache_fields = (MAIL_FETCH_RECEIVED_DATE | MAIL_FETCH_SAVE_DATE | MAIL_FETCH_PHYSICAL_SIZE | MAIL_FETCH_VIRTUAL_SIZE | MAIL_FETCH_IMAP_ENVELOPE | MAIL_FETCH_REFCOUNT | unknown: 1426065408), backend_ns_prefix = 0x7ffff73b1e59 <t_pop_check+9> ";\003u\v\307\003", backend_ns_type = (unknown: 1434470880)} status = {messages = 4294960472, recent = 32767, unseen = 0, uidvalidity = 0, uidnext = 1434582544, first_unseen_seq = 0, first_recent_uid = 232594432, last_cached_seq = 3612951791, highest_modseq = 93824995052000, highest_pvt_modseq = 93824992578308, keywords = 0x1, permanent_flags = 4151223616, permanent_keywords = 1, allow_new_keywords = 1, nonpermanent_modseqs = 1, no_modseq_tracking = 1, have_guids = 1, have_save_guids = 1, have_only_guid128 = 1} ret_guid = <optimized out> #7 0x00007ffff76ea737 in mailbox_delete (box=box@entry=0x5555558049e0) at mail-storage.c:1319 ret = <optimized out> #8 0x00005555555895d4 in dsync_brain_mailbox_tree_sync_change (brain=brain@entry=0x5555557fcd00, change=<optimized out>) at dsync-brain-mailbox-tree-sync.c:182 box = 0x5555558049e0 destbox = 0x5555558007c8 errstr = 0x5555557ff750 "\030\366\177UUU" func_name = 0x0 ---Type <return> to continue, or q <return> to quit--- storage_name = <optimized out> error = 32767 ret = <optimized out> __FUNCTION__ = "dsync_brain_mailbox_tree_sync_change" #9 0x00005555555892db in dsync_brain_mailbox_trees_sync (brain=0x5555557fcd00) at dsync-brain-mailbox-tree.c:291 ctx = 0x55555580ab40 change = <optimized out> sync_type = <optimized out> sync_flags = <optimized out> #10 dsync_brain_recv_mailbox_tree_deletes (brain=brain@entry=0x5555557fcd00) at dsync-brain-mailbox-tree.c:440 deletes = 0x5555557fa0a0 i = <optimized out> count = 0 sep = 47 '/' __FUNCTION__ = "dsync_brain_recv_mailbox_tree_deletes" #11 0x00005555555860e8 in dsync_brain_run_real (changed_r=0x7fffffffe74b, brain=0x5555557fcd00) at dsync-brain.c:565 ret = true orig_state = DSYNC_STATE_RECV_MAILBOX_TREE_DELETES orig_box_recv_state = DSYNC_BOX_STATE_MAILBOX orig_box_send_state = DSYNC_BOX_STATE_MAILBOX changed = false #12 dsync_brain_run (brain=0x5555557fcd00, changed_r=changed_r@entry=0x7fffffffe74b) at dsync-brain.c:610 _data_stack_cur_id = 2 changed_r = 0x7fffffffe74b brain = 0x5555557fcd00 #13 0x00005555555846f7 in cmd_dsync_run_local (changes_during_sync_r=<synthetic pointer>, ibc2=<optimized out>, brain=0x5555557e1860, user=<optimized out>, ctx=0x5555557cd590) at doveadm-dsync.c:384 brain2 = 0x5555557fcd00 set_parser = <optimized out> location = <optimized out> user2 = 0x0 brain1_running = true changed1 = true ret = <optimized out> set_line = <optimized out> brain2_running = true changed2 = false #14 cmd_dsync_run (_ctx=0x5555557cd590, user=<optimized out>) at doveadm-dsync.c:596 ---Type <return> to continue, or q <return> to quit--- ctx = 0x5555557cd590 ibc = 0x5555557d50d0 ibc2 = 0x5555557e14d0 brain = 0x5555557e1860 set = {process_title_prefix = 0x0, sync_namespaces = {arr = {buffer = 0x5555557c0378, element_size = 8}, v = 0x5555557c0378, v_modifiable = 0x5555557c0378}, sync_box = 0x0, sync_box_guid = '\000' <repeats 15 times>, exclude_mailboxes = 0x0, lock_timeout_secs = 0, state = 0x0} ns = 0x5555557cd670 strp = <optimized out> brain_flags = <optimized out> remote_errors_logged = false changes_during_sync = false status = 0 ret = 0 #15 0x0000555555569e4b in doveadm_mail_next_user (ctx=0x5555557cd590, input=<optimized out>, error_r=0x7fffffffe898) at doveadm-mail.c:314 error = 0x5555557cd590 "p\325|UUU" ret = <optimized out> error_r = 0x7fffffffe898 input = <optimized out> ctx = 0x5555557cd590 ip = <optimized out> ret = 0 #16 0x000055555556ac2c in doveadm_mail_cmd (argv=0x5555557c73b8, argc=4, cmd=0x5555557cb140) at doveadm-mail.c:525 input = {module = 0x0, service = 0x5555555a7367 "doveadm", username = 0x5555557c73e7 "easymail", 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} ctx = 0x5555557cd590 getopt_args = 0x5555557bf660 "+1dEfg:l:m:n:NPr:Rs:Ux:RAS:u:" ret = <optimized out> c = <optimized out> wildcard_user = 0x0 error = 0x7ffff73b7122 <master_service_init_finish+226> "H\213\204$\230" #17 doveadm_mail_try_run (cmd_name=<optimized out>, argc=4, argv=0x5555557c73a0) at doveadm-mail.c:617 cmd = 0x5555557cb140 #18 0x00005555555699a4 in main (argc=4, argv=0x5555557c73a0) at doveadm.c:398 cmd_name = 0x5555557c73dd "backup" i = <optimized out> ---Type <return> to continue, or q <return> to quit--- quick_init = false c = <optimized out> ----------------------------------------------- Fabio Onorini ----------------------------------------------- Gruppo SeCoGes srl Via Enzo Ferrari, 4/6 - 25134 - Brescia - Italy Tel. +39 030 23 06 877 Fax +39 030 23 15 512 Sito Web: http://www.secoges.com Indirizzo EMail (assistenza): easymail(a)secoges.com ------------------------------------------------

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Require different setting for mail_location for each of POP3S and IMAPS protocols
by Andrew McGlashan 23 Feb '16

23 Feb '16

Okay, Let's try this a different way. I've been able to configure past dovecot to have a different mail_location setting for the same user, but with different protocols. When the user requests POP3S, I adjusted the mail_location to /var/mail/$USER (with mbox in use). When that *same* user requested IMAPS protocol, the required mail_location is the Maildir folder. This allows for independent two mail storage locations, one for the use of mbox and the other for the use of Maildir *and* for the same user. Some users only require mbox with others only requiring Maildir. So, I need to cater for each of these situations. How might I adjust current dovecot configuration to provide different mail_location settings for different protocols? Old dovecot allowed me to run a script before POP3S processing that gave me the chance to adjust the mail_location variable. That is what I need now, just for POP3S. Thanks AndrewM

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syntax for overriding userdb fields from passdb config
by Thomas Möhle 23 Feb '16

23 Feb '16

Dear Dovecot developers, how exactly is the syntax to override a userdb field within the passdb configuration? I cannot find any documentation on this in the wiki. Let's say, I'd like to override the userdb extra field "chroot" with /var/mail. How exactly would be the notation? My auth-sql.conf.ext looks like this: passdb { driver = sql args = /etc/dovecot/dovecot-sql.conf.ext } userdb { driver = sql args = /etc/dovecot/dovecot-sql.conf.ext } I already tried these modifications within the passdb area: override_fields = userdb_chroot=/var/mail override_fields = userdb:chroot=/var/mail override_fields = %{userdb:chroot}=/var/mail override_fields = %{userdb_chroot}=/var/mail but none of the above returned /var/mail when I tried to hand %{userdb:chroot} to an external script. Thanks for your help, Thomas Möhle

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RE: Dovecot Bulletin
by Kevin Kershner 23 Feb '16

23 Feb '16

It also got the bulletin out to new users without admin intervention. Sent from Mobile ________________________________ From: Doug Hardie<mailto:bc979@lafn.org> Sent: ‎2/‎22/‎2016 4:02 To: Dovecot Mailing List<mailto:dovecot@dovecot.org>; Timo Sirainen<mailto:tss@iki.fi> Cc: Kevin Kershner<mailto:cstkersh@outlook.com> Subject: Re: Dovecot Bulletin > On 20 February 2016, at 18:14, Timo Sirainen <tss(a)iki.fi> wrote: > > On 21 Feb 2016, at 02:50, Kevin Kershner <cstkersh(a)outlook.com> wrote: >> >> I'd like to revisit and old post if I may, will/does Dovecot support the old >> qpopper "Bulletin" ability? >> >> Basically I need a simple way of posting bulletins to all domain users. >> Qpopper maintained a bulletin db for each user and sent them the next >> bulletin in sequence. > > I guess there could be a plugin that does this check on each login. But would it actually be useful? Why would it be better than simply sending the mail to all the users? For example: > > doveadm save -A < bulletin.txt The reasons for bulletins as I see it are: 1. The doveadm save command is undocumented. It does show a cryptic line in the output of the command "doveadm". However, it doesn't give any clue what it does or how to provide the message. Your note above provides considerably more information on that command. I tested it and it works as you have indicated though. 2. The doveadm save command causes the email to be saved in each user's mailbox. If you have a lot of users, thats a lot of wasted disk space. Qpopper's bulletins only kept one copy and every user downloaded from that copy. All that was retained per user was a counter of the last bulletin's sequence number that was downloaded. — Doug

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systemd changes in Git/Debian Auto-Builds
by Thomas Leuxner 22 Feb '16

22 Feb '16

Not sure if the issue is limited to the Debian Auto-Builds, but after the latest commits an update of the packages fails: https://github.com/dovecot/core/commit/53cc71cae88ee81fd7eae47aed743496f8c8… Feb 21 07:31:22 nihlus dovecot: master: Dovecot v2.2.devel (950a6e6) starting up for imap, lmtp Feb 21 07:31:22 nihlus systemd[1]: PID file /var/run/dovecot/dovecot/master.pid not readable (yet?) after start. The PID-File seems to be expected under yet another sub-dir of /var/run/dovecot. Regards Thomas

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Dovecot Bulletin
by Kevin Kershner 22 Feb '16

22 Feb '16

I'd like to revisit and old post if I may, will/does Dovecot support the old qpopper "Bulletin" ability? Basically I need a simple way of posting bulletins to all domain users. Qpopper maintained a bulletin db for each user and sent them the next bulletin in sequence. Thanks in advance Kevin

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