- dovecot - dovecot.org

Dovecot processes turning zombie
by Adrian POPA 10 Nov '16

10 Nov '16

Hi I am running Ubuntu 14.04 (plan to go to 16.04) with Postfix and Dovecot 2.2.9 from Ubuntu repository. Dovecot configuration has not changed dramatically since the days of Ubuntu 12.04 (can't remember Dovecot version). In the last months, connection to Dovecot IMAP service become more and more dificult. First Ubuntu Thunderbird refused to connect, than Android phones. The last one connecting regularly was an old XP laptop(!). Now it's facing problems too. Again, I did not make any configuration changes lately so only system upgrades (libraries) may have caused this. The first thing to notice was that some Dovecot processes are going zombie (defunct). At startup "ssl-params", then sometimes "auth", "imap-login" and rarely "config". Turning on debug logging in Dovecot show that offending process "is ignoring idle SIGINT". And "auth client limit (1000) reached". This behavior also impacts on Postfix delivery through Dovecot LDA with "status=deferred (temporary failure)" (I turned off mail sending with -e in lda invocation). Another thing is SLL connection. Attempts to test with openssl s_client show that Dovecot is not responding after ClientHelo when it should normally send server certificate. The very same certificate is used with Postfix and it works (I can send mails through Postfix) but IMAP connections to Dovecot do not. There is no protocol mismatch because I have try a local SSL connection (same computer). Initial messages are TLS1.2 but nothing in response. So my question is: did you faced such problems and found a cause (and maybe a fix)? Upgrading to Ubuntu 16.04 with whatever Dovecot version it provides may resolve the issues? Thanks

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<-FIN <-RST ->FIN,ACK <-RST on SSL connection shutdown
by Heiko Schlittermann 10 Nov '16

10 Nov '16

Hello, a typical connection close, tcpdump'ed on the server side, looks as follows: 21:44:01.168131 IP xxx.xxx.3.101.143 > xxx.xxx.3.96.35518: Flags [FP.], seq 3982457856:3982457959, ack 1570044906, win 243, options [nop,nop,TS val 138698279 ecr 159494908], length 103 21:44:01.172405 IP xxx.xxx.3.101.143 > xxx.xxx.3.96.35518: Flags [R], seq 3982457960, win 0, length 0 21:44:01.172442 IP xxx.xxx.3.96.35518 > xxx.xxx.3.101.143: Flags [F.], seq 32, ack 104, win 342, options [nop,nop,TS val 159494909 ecr 138698279], length 0 21:44:01.172471 IP xxx.xxx.3.101.143 > xxx.xxx.3.96.35518: Flags [R], seq 3982457960, win 0, length 0 The server closes (FIN) the connection, and already 4.274 ms later the server sends a RST to the client. The clients response to FIN arrives some μs later. (On the client side the order of the packages is different (FIN from Server, FIN,ACK from client, RST from Server, RST from Server) This behaviour seems to be odd (the client side firewall complains about the unexpected packages). I can reproduce it using openssl -connect … -starttls imap .. on the client side. It happens on IMAP+STARTTLS as well as on IMAPS. It does not happen on plaintext IMAP. There I see the expected shudown handshake FIN - FIN,ACK - ACK. Dovecot version is 2.2.24 (a82c823) Best regards from Dresden/Germany Viele Grüße aus Dresden Heiko Schlittermann -- SCHLITTERMANN.de ---------------------------- internet & unix support - Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} - gnupg encrypted messages are welcome --------------- key ID: F69376CE - ! key id 7CBF764A and 972EAC9F are revoked since 2015-01 ------------ -

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Backing up dovecot mailboxes
by Jerry 09 Nov '16

09 Nov '16

Does anyone have a working solution as to how I can use "doveadm backup" to back up a virtual users mailbox to a removable USB device. I keep receiving numerous errors and no files are backed up although the directories are created. -- Jerry

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Indexing failed: 500 Internal Server Error
by W. de Hoog 09 Nov '16

09 Nov '16

Hi, While running doveadm index on a mailbox this gets printed: doveadm(neil): Error: fts_solr: Indexing failed: 500 Internal Server Error doveadm(neil): Panic: file http-client-request.c: line 792 (http_client_request_send_payload): assertion failed: (ret == 0) doveadm(neil): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x88662) [0x7f0a52750662] -> /usr/lib/dovecot/libdovecot.so.0(+0x886d9) [0x7f0a527506d9] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f0a526e9f81] -> /usr/lib/dovecot/libdovecot.so.0(http_client_request_send_payload+0xc8) [0x7f0a52703cf8] -> /usr/lib/dovecot/modules/lib21_fts_solr_plugin.so(solr_connection_post_more+0x49) [0x7f0a518654a9] -> /usr/lib/dovecot/modules/lib21_fts_solr_plugin.so(+0x3187) [0x7f0a51861187] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0x8667) [0x7f0a51ec8667] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(fts_build_mail+0x4f1) [0x7f0a51ec8fb1] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0xefce) [0x7f0a51ecefce] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_precache+0x29) [0x7f0a52a045f9] -> /usr/bin/doveadm(+0x2e997) [0x565355d01997] -> /usr/bin/doveadm(+0x28dec) [0x565355cfbdec] -> /usr/bin/doveadm(+0x299ca) [0x565355cfc9ca] -> /usr/bin/doveadm(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x209) [0x565355cfd7d9] -> /usr/bin/doveadm(doveadm_cmd_run_ver2+0x555) [0x565355d0c715] -> /usr/bin/doveadm(doveadm_cmd_try_run_ver2+0x37) [0x565355d0c767] -> /usr/bin/doveadm(main+0x1da) [0x565355cecc7a] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f0a5231f830] -> /usr/bin/doveadm(_start+0x29) [0x565355ced059] $ dovecot -n # 2.2.26.0 (23d1de6): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.devel (623ae77) # OS: Linux 4.4.0-45-generic x86_64 Ubuntu 16.04.1 LTS disable_plaintext_auth = no log_path = /var/log/dovecot.log mail_plugins = fts fts_solr mail_privileged_group = mail namespace { hidden = yes inbox = yes list = no location = mbox:~/mail:INBOX=/var/mail/%u prefix = "#mbox/" separator = / } namespace { list = yes location = sdbox:/home/imapshared-sdbox prefix = shared/ separator = / subscriptions = no type = public } namespace inbox { location = sdbox:~/sdboxmail 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 = separator = / } passdb { driver = pam } plugin { fts = solr fts_autoindex = yes fts_solr = break-imap-search url=http://localhost:8080/solr/ fts_squat = partial=4 full=10 sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = " imap" ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep tb-lsub-flags } -- Willem-Jan de Hoog

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Too many references: cannot splice
by Luis Ugalde 09 Nov '16

09 Nov '16

Hi, A while ago I sent an email regarding these "*ETOOMANYREFS* Too many references: cannot splice." that we've seen since Debian updated the Jessie kernel to 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u3 (2016-01-17) x86_64 while older kernels, like 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 showed no errors at all. I was wondering if no one else is getting these errors, or if you know any workarounds that might probe useful, apart from downgrading the kernel. I would say that the infrastructure we're running is quite standard, with directors balancing users to NFS backed dovecot servers. Best regards, Luis Ugalde.

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Repeat e-mail syndrome shows up in 2.2.26+
by The Doctor 09 Nov '16

09 Nov '16

Getting complaints from people about pop/imap issues. some people are getting repaeted e-mail. Other are not able to delete their e-mails from an IMAP lcient. Current configuration /usr/dovecot2/sbin/dovecot -n # 2.2.26.0 (23d1de6): /usr/dovecot2/etc/dovecot/dovecot.conf # OS: FreeBSD 11.0-RELEASE-p2 amd64 base_dir = /var/run/dovecot/ disable_plaintext_auth = no first_valid_uid = 100 info_log_path = /var/log/dovecot-info.log listen = [::] log_path = /var/log/dovecot.log login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c mail_debug = yes mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_log_prefix = %Us(%u): mdbox_rotate_size = 2 k passdb { args = /etc/master.passwd driver = passwd-file } plugin { home = /usr/dovecot2 } service auth { executable = /usr/dovecot2/libexec/dovecot/auth user = root } service imap-login { chroot = login client_limit = 256 executable = /usr/dovecot2/libexec/dovecot/imap-login inet_listener imap { address = 204.209.81.1, 127.0.0.1 port = 143 } inet_listener imaps { address = 204.209.81.1, 127.0.0.1 port = 993 ssl = yes } process_limit = 128 process_min_avail = 3 service_count = 1 user = dovecot } service imap { executable = /usr/dovecot2/libexec/dovecot/imap process_limit = 512 } service lmtp { executable = lmtp -L inet_listener lmtp { address = 204.209.81.1 127.0.0.1 ::1 port = 24 } process_min_avail = 5 } service pop3-login { chroot = login client_limit = 256 executable = /usr/dovecot2/libexec/dovecot/pop3-login inet_listener pop3 { address = 204.209.81.1 port = 110 } inet_listener pop3s { address = 204.209.81.1 port = 995 ssl = yes } process_limit = 128 process_min_avail = 3 service_count = 1 user = dovecot } service pop3 { executable = /usr/dovecot2/libexec/dovecot/pop3 process_limit = 512 } ssl_cert = </usr/dovecot2/etc/dovecot/ssl/pop3.nk.ca.2016.chain.crt ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:aNULL ssl_key = # hidden, use -P to show it userdb { driver = passwd } userdb { args = /etc/passwd driver = passwd-file } verbose_ssl = yes protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep imap_idle_notify_interval = 2 mins imap_logout_format = bytes=%i/%o imap_max_line_length = 64 k mail_max_userip_connections = 10 mail_plugin_dir = /usr/dovecot2/lib/dovecot/imap ssl_cert = </usr/dovecot2/etc/dovecot/ssl/pop3.nk.ca.2016.chain.crt ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:aNULL ssl_key = # hidden, use -P to show it verbose_ssl = yes } protocol pop3 { mail_max_userip_connections = 3 mail_plugins = pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_enable_last = yes pop3_lock_session = yes pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s pop3_no_flag_updates = yes pop3_reuse_xuidl = yes pop3_save_uidl = no pop3_uidl_format = %08Xu%08Xv ssl_cert = </usr/dovecot2/etc/dovecot/ssl/pop3.nk.ca.2016.chain.crt ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:aNULL ssl_key = # hidden, use -P to show it verbose_ssl = yes } protocol lmtp { auth_username_format = %Lu info_log_path = /var/log/dovecot-lmtp.log } Sorry about the indents. Anything causing these issues? -- Member - Liberal International This is doctor@@nl2k.ab.ca Ici doctor@@nl2k.ab.ca God,Queen and country!Never Satan President Republic!Beware AntiChrist rising! http://www.fullyfollow.me/rootnl2k Look at Psalms 14 and 53 on Atheism Time for the USA to hold a referendum on its republic and vote to dissolve!!

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that's just so amazing and wonderful
by mrgrim 08 Nov '16

08 Nov '16

Hi friend! Look at that amazing stuff, it is absolutely wonderful. Please take a look <http://bargain.jontrauner.com/e4tfx/5> Speak to you later, mrgrim

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imapsieve pigeonhole plugin?
by Larry Rosenman 08 Nov '16

08 Nov '16

How do you enable the imapsieve plugin? I added sieve_plugins = imapsieve and it whines: hebighonker.lerctr.org /usr/local/etc/dovecot/conf.d # service dovecot restart managesieve: Fatal: Plugin 'imapsieve' not found from directory /usr/local/lib/dovecot/sieve doveconf: Error: managesieve-login: dump-capability process returned 89 Stopping dovecot. Waiting for PIDS: 97491. managesieve: Fatal: Plugin 'imapsieve' not found from directory /usr/local/lib/dovecot/sieve doveconf: Error: managesieve-login: dump-capability process returned 89 Starting dovecot. managesieve: Fatal: Plugin 'imapsieve' not found from directory /usr/local/lib/dovecot/sieve doveconf: Error: managesieve-login: dump-capability process returned 89 this plugin seems to be poorly documented. :( -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 (c) E-Mail: larryrtx(a)gmail.com US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281

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wiki: Plugins/Virtual: SQL error?
by Larry Rosenman 08 Nov '16

08 Nov '16

Is one of these supposed to be imap? Note that none of the namespaces have inbox=yes. This is because for IMAP users you want the inbox namespace to have inbox=yes, but for POP3 users you want the virtual namespace to have inbox=yes. This requires setting the inbox=yes in userdb extra fields <http://wiki2.dovecot.org/UserDatabase/ExtraFields>. For example with MySQL you can can do this like: user_query = SELECT ..., \ CASE '%s' WHEN 'pop3' THEN NULL ELSE 'yes' END AS 'namespace/inbox/inbox', \ CASE '%s' WHEN 'pop3' THEN 'yes' ELSE NULL END AS 'namespace/virtual/inbox' \ WHERE ... -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 (c) E-Mail: larryrtx(a)gmail.com US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281

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A lot of duplicate GUIDS.
by kjonca＠o2.pl 08 Nov '16

08 Nov '16

Recently I have in logs a LOT of messages like this: [....] Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13511 in m.1530:845670 (size=2622) and m.1371:1831730 (size=916) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13512 in m.1530:847414 (size=2274) and m.1371:1832476 (size=1069) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13513 in m.1530:848971 (size=2339) and m.1371:1833330 (size=1202) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13514 in m.1530:850496 (size=2723) and m.1371:1834276 (size=1036) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13515 in m.1530:852219 (size=2187) and m.1371:1835108 (size=1638) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13516 in m.1530:853684 (size=2614) and m.1371:1836275 (size=942) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13517 in m.1530:855355 (size=1990) and m.1371:1837035 (size=1241) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13518 in m.1530:856738 (size=2724) and m.1371:1837913 (size=1772) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13519 in m.1530:858491 (size=2810) and m.1371:1839151 (size=1090) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13520 in m.1530:860313 (size=3775) and m.1371:1839988 (size=1206) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13521 in m.1530:862569 (size=2253) and m.1371:1840884 (size=1491) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13522 in m.1530:864044 (size=6491) and m.1371:1841937 (size=1335) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13523 in m.1530:867783 (size=1824) and m.1371:1842892 (size=1342) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13524 in m.1530:869032 (size=2387) and m.1371:1843849 (size=1941) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13526 in m.1530:872105 (size=2607) and m.1371:1845147 (size=1496) Nov 06 19:39:36 IMAP(kjonca): Error: mdbox /home/kjonca/Mail/1/storage: Duplicate GUID 13528 in m.1530:875255 (size=1967) and m.1371:1846195 (size=1214) [...] # 2.2.devel (42f5200): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.devel (623ae77) # OS: Linux 4.4.0-1-amd64 x86_64 Debian stretch/sid Only "suspected operation" was this sequence: 1. $doveadm mailbox rename RSS RSS-old 2. $doveadm mailbox create RSS 3. --------- copy mails from RSS-old to RSS, and expunge from RSS-old - this operation fails and in dovecot logs were a lot of messages about duplicated guids ---------- 4. $doveadm mailbox delete RSS-old Initially in RSS mailbox were a lot of deleted and expunged mails, but I did not "doveadm purge" I looks like "doveadm force-resync" helps, but I'm not sure if I lost some mails? KJ -- http://stopstopnop.pl/stop_stopnop.pl_o_nas.html Due to circumstances beyond your control, you are master of your fate and captain of your soul.

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