- dovecot - dovecot.org

doveadm reload kicked proxy/director users
by Peer Heinlein 06 Oct '16

06 Oct '16

We just noticed, that a doveadm reload kicked all existing imap-sessions on our Dovecot Director. We're surprised about that, because shutdown_clients is set to NO. Is there any way to reload a config change without kicking all IMAP sessions? Peer -- Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-42 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin

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Changing Dovecot's format from Maildir to mdbox
by Kristopher Joyce 05 Oct '16

05 Oct '16

Hello, I am trying to change Dovecot's email format from Maildir to mdbox. I have changed Maildir to mdbox in Mail_location from: maildir:/var/vmail/%d/%n to: mdbox:/var/vmail/%d/%n. Nothing seems to happen after I restart Dovecot. The users are virtual users and not local users. Is there something I am missing? Thanks Kris --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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Connection reset by peer query
by voytek＠sbt.net.au 05 Oct '16

05 Oct '16

One of my user having trouble 'synchronizing' his mobile with his mailbox looking at logs I can see like[1]: searching around, I found some posts suggesting index corruption?? what can or what should I do ? can I force re-index ? delete index files ? which ones ? using outlook on Win7, if relevant [1] Oct 05 11:24:32 imap(aaa(a)aaa.com.au): Info: Connection closed: Connection reset by peer in=238 out=1892993 # grep aaa@aaa /var/log/dovecot.log | grep reset | wc 10 130 1117 # grep aaa@aaa /var/log/dovecot.log.1 | grep reset | wc 30 406 3582

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Dovecot + SAN with dedup+compression
by María Arrea 04 Oct '16

04 Oct '16

Hello We have a big Dovecot Server (over 20 TB of mail, 40K users, over 30K iops) and we are evaluating a new SAN Array. We have competitive proposals from Pure Storage (All Flash) , HP 3Par (Hybrid), NetApp FaaS (Hybrid) & EMC Unity (Hybrid). We rely in mdbox+zlib for main storage and mdbox+lzma for secondary storage, does anybody in the list have experience with SAN-based deduplication/compression? Regards Maria.

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shared folders
by Scherff 04 Oct '16

04 Oct '16

Well, these is the complete output for dovecot -n : mail:~ # dovecot -n # 2.2.18: /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.8 (0c4ae064f307+) # OS: Linux 4.1.31-30-default x86_64 openSUSE 42.1 (x86_64) auth_mechanisms = plain login mail_gid = vmail mail_home = /var/vmail/mailboxes/%d/%n mail_location = maildir:~/mail:LAYOUT=fs mail_plugins = " acl" mail_privileged_group = vmail mail_uid = 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 environment mailbox date index ihave duplicate namespace { hidden = no ignore_on_failure = no list = children location = maildir:%%h/mail:INDEX=%h/mail/shared/%%u:CONTROL=%h/mail/shared/%%u prefix = shared/%%u/ separator = / subscriptions = yes type = shared } namespace inbox { inbox = yes location = mailbox Archives { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Notes { auto = subscribe } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { acl = vfile:/var/vmail/dovecot-acl acl_shared_dict = file:/var/vmail/db/shared-mailboxes.db quota = maildir:User quota quota_exceeded_message = Benutzer %u hat das Speichervolumen überschritten. / User %u has exhausted allowed storage space. sieve = /var/vmail/sieve/%d/%n/active-script.sieve sieve_before = /var/vmail/sieve/global/spam-global.sieve sieve_dir = /var/vmail/sieve/%d/%n/scripts zlib_save = gz zlib_save_level = 6 } protocols = imap lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service imap-login { inet_listener imap { port = 143 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } user = vmail } service managesieve-login { inet_listener sieve { port = 4190 } } ssl = required ssl_cert = </etc/fullchain.pem ssl_cipher_list = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA256:EECDH:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA128-SHA:AES128-SHA ssl_dh_parameters_length = 2048 ssl_key = </etc/privkey.pem ssl_prefer_server_ciphers = yes userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { imap_idle_notify_interval = 15 mins mail_max_userip_connections = 100 mail_plugins = " acl quota imap_quota zlib imap_acl" } protocol lmtp { mail_plugins = " acl sieve zlib" }

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Dovecot + SAMBA4
by doys 04 Oct '16

04 Oct '16

hello, I'm new to this forum:) I couldn't found any topic with the same problem and I'm sorry for the inconvenience if there is already one. I'd like to use Dovecot with an authentification from Samba4 via Kerberos. I've followed this procedure : http://wiki2.dovecot.org/Authentication/Kerberos but I cannot connect to the domain. I have not met any difficulty with Samba ; I have others servers that are connected to the samba4 domain via samba/winbind wbinfo -u / -g et getent passwod / group works fine. I don't find the error and the logs are fruitless : Oct 4 09:03:46 mail dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=MY_IP, lip=IP_SERVER, session=<4ilrqQQ+2AAKaBFq> Oct 4 09:03:46 mail dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=MY_IP, lip=IP_SERVER, session=<7SprqQQ+2QAKaBFq> Oct 4 09:03:55 mail dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=MY_IP, lip=IP_SERVER, session=<JmjtqQQ+2gAKaBFq> Oct 4 09:03:55 mail dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=MY_IP, lip=IP_SERVER, session=<UyHuqQQ+2wAKaBFq> This is my docevot -n # 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.6 auth_default_realm = DOMAIN.COM auth_gssapi_hostname = $ALL auth_mechanisms = gssapi auth_realms = DOMAIN.COM auth_username_translation = /@ 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 Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap pop3" ssl = no userdb { driver = static } I wish to use maildir and I wish not to have multidomain. The server is a Debian 8 with compilated samba 4.4.5 + dovecot 2.2.13 (deb file). i dovecot-core - secure POP3/IMAP server - core files i dovecot-gssapi - secure POP3/IMAP server - GSSAPI support i dovecot-imapd - secure POP3/IMAP server - IMAP daemon i dovecot-pop3d - secure POP3/IMAP server - POP3 daemon i dovecot-sieve - secure POP3/IMAP server - Sieve filters su And this is what telnet returns : telnet localhost 143 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LOGINDISABLED AUTH=GSSAPI] Dovecot ready. Can you give me a hint, please ? Thank you ! doys Messages: 1 Inscrit le: 2016-10-04 10:31 Haut -- View this message in context: http://dovecot.2317879.n4.nabble.com/Dovecot-SAMBA4-tp57421.html Sent from the Dovecot mailing list archive at Nabble.com.

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Re: NFSv4 and Maildir
by Joseph Tam 04 Oct '16

04 Oct '16

Noel Butler writes: >> I found the same thing, and turning off write delegation seemed >> to have solved the problem. I still don't know why, though. > > write delegation is disabled by default on NetApp with v4, or have they > changed this now? I think this is still the case: when I exported NFSv4, I also turned on both r/w delegation as well. The exported filesystem exhibited weird locking or slow write operations on NFS clients (e.g. "touch newfile" would take a second to complete). This went away when I turned off write delegation. Joseph Tam <jtam.home(a)gmail.com>

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doveadm backup fails (compromised single attachment storage)
by Webert de Souza Lima 03 Oct '16

03 Oct '16

Hi, A couple of months ago I had a problem with Single Attachment Storage after infrastructure migration; All mailboxes were rsynced to another filesystem, and that may have broken Single Attachment Storage. Many, many (if not all) mailboxes show the below logs on dovecot: imap(foo(a)bar.com): Error: read(attachments-connector(zlib(/dovecotdir/mail/ bar.com/foo/mailboxes/INBOX/dbox-Mails/u.26426))) failed: read(/dovecotdir/attach/ bar.com/de/86/de8673894d6fb3f4460e3c26436eefa9a73517fa0f000452f553822367220… b/l]) failed: open(/dovecotdir/attach/ bar.com/de/86/de8673894d6fb3f4460e3c26436eefa9a73517fa0f000452f553822367220…) failed: No such file or directory When that happens, the MUA keeps syncing forever. Now, I need to migrate all mailboxes (again) to another dovecot instance (with no SAS), which works perfectly for new users but when I try to migrate users from my current dovecot server for this new server, I get such errors again, and I can't migrate: 2016-09-29T12:20:50.995934059Z Sep 29 12:20:50 dsync-server(foo(a)bar.com): Error: dsync(cf7d091311eb): read(attachments-connector(zlib(/dovecotdir/mdbox/bar.com/foo/storage/m.1))) failed: read(/dovecotdir/attach/ bar.com/0c/df/0cdf86b1920938fe3a043f87e2ee9e63dda276bd5b9fba687e4a0c63d181c… b/l]) failed: open(/dovecotdir/attach/ bar.com/0c/df/0cdf86b1920938fe3a043f87e2ee9e63dda276bd5b9fba687e4a0c63d181c…) failed: No such file or directory (last sent=mail, last recv=mail_request (EOL)) Is there a way to fix the attachments problem? (I know I can't recover such files, that's Ok) Is there a way to migrate (dsync backup) ignoring such problems? Thanks in advance.

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shared folders
by Scherff 03 Oct '16

03 Oct '16

Hi, i am stuck. Try to install shared folders - dovecot is running fine. ACL is working. But i can't get running the shared folders. Maybe someone can help. This are the relevant conf. I think i have some mistake there - perhaps in location - changed try and error - stuck: mail_home = /var/vmail/mailboxes/%d/%n mail_location = maildir:~/mail:LAYOUT=fs namespace { hidden = no ignore_on_failure = no list = children location = maildir:%%h/mail:INDEX=%h/mail/shared/%%u:CONTROL=%h/mail/shared/%%u prefix = shared/%%u/ separator = / subscriptions = yes type = shared } namespace inbox { inbox = yes location = mailbox Archives { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Notes { auto = subscribe } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } plugin { # global acl - prevent expunche for some folder acl = vfile:/var/vmail/dovecot-acl acl_shared_dict = file:/var/vmail/db/shared-mailboxes.db } protocol imap { imap_idle_notify_interval = 15 mins mail_max_userip_connections = 30 mail_plugins = " acl imap_acl" } protocol lmtp { mail_plugins = " acl" } Need some hint. Thanks Alfred

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Shared folder in a sharded cluster setup
by Peer Heinlein 03 Oct '16

03 Oct '16

Hi! With Dovecot Director and Proxy or the new (great!) TAG-feature from Dovecot it's easy to set up a shared IMAP-Cluster with individual local filesystems. But I'm unsure if it's possible to build a setup where shared mailboxes still can work. If user A is on Cluster (1) and user B is on (2), and Cluster (1) does not have access to the mail-home from B on (2), then user A can not reach the shared folders provided from User B on (2). I hope that there is a kind of backend-proxy-mechanism, so that the imap process of A on (1) can imap-proxy the requests for the shared folder to a node from cluster shard (2). And: To be exact, the imap process on (1) should forward the request to cluster (2) by the director system to make sure, that the connection will terminate on the right active backend of User B. This sounds like a special problem if local filesystems with mdbox are used and I now the great features of using Dovecot on Object Store, where every node can check out all mail-locations from all users. But especially on obox-systems it is very important that requests for a user are always terminated on the same backend. So how can shared folders work there?! Node (1) can not checkout the shared folders from User B if his obox storage is already active on another host (2)! Peer -- Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-42 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin

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