- dovecot - dovecot.org

Re: [Dovecot] Architecture for large Dovecot cluster
by Stan Hoeppner 28 Jan '14

28 Jan '14

This went to me only so bringing back on list. On 1/24/2014 11:09 AM, Tom Johnson wrote: > Is anybody using the Object Storage plugin for large-scale > installations? I've not used it. > We're considering it, but are thinking of an in-house > S3 storage system (riak, or ceph, or ?) Looking to support perhaps > 300k users. I was thinking that if we use a bank of dovecot servers > (with director) with ssds as cache, we might be able to consolidate > all the storage on something like a riak cluster, which would make > scaling simple and inexpensive - certainly much less than a NetApp > solution. Everything costs less than a NetApp...except an EMC. > If anyone has any first-hand experience (or even > off-the-top-of-their-head thoughts), I'd love to hear them) Distributed filesystems give you the advantage of a single filesystem namespace with massive amounts of storage, fairly easy addition of storage space, and distributed replication to allow failure of a storage node without service interruption. Replication mitigates node failure, but not disk failure, so you still need RAID in each node. So you have RAID6 in a node and filesystem block mirroring amongst nodes. Thus storage utilization is -worse- than direct attach, CFS on SAN, or NFS head attached RAID10 and far worse than RAID6 in these 3 setups. And if using large SSD cache you'd surely use RAID6 with DAS, CFS, or NFS. You'd need half as many disk drives vs DFS. Each DFS expansion, assuming the typical model, entails the cost of a server, RAID HBA (unless using md) and disks, not strictly buying disks as with DAS, CFS/SAN, or NFS filer. Then you also need more switch ports, more power connections, greater UPS capacity due to all the CPUs, RAM, etc in the nodes. And you'll have a higher electric bill. So while a distributed filesystem storage architecture may seem less expensive it may not be. And just as one can build a DIY DFS cluster, one can also build a DIY NFS cluster instead of buying a NetApp, saving significant cash on the front end box and on disks since you'd need half as many vs a distributed filesystem architecture, though failure of one node may not be quite as graceful as with a NetApp losing a controller board. -- Stan

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[Dovecot] Replication - what am I doing wrong?
by IT geek 31 27 Jan '14

27 Jan '14

Hi, I'm having issues getting replication working, and I'm not also not having much luck finding help on it. So I'm wondering... am I not asking the right questions? Or am I not providing enough information... or do we just not know how this aspect of the technology works? If it's the former, then any pointers on what questions to ask or information to provide would be very helpful. If the community genuinely doesn't know how this works then that's okay too - I will look at another solution (if one exists) and try to move on. But if I can get this working then that would be amazing as I really like Dovecot and would be gutted to move away from it. -Mark

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[Dovecot] managesieve - point me in the right direction?
by erik 27 Jan '14

27 Jan '14

Hi, I am using Dovecot 2.1.16. I'm trying to get Roundcube to talk to the managesieve plugin. Postfix/Dovecot/Roundcube all exist on the same server. I'd like to get managesieve working. I've gone through a few guides, such as: https://wiki.archlinux.org/index.php/dovecot#Sieve But so far roundcube won't connect to the managesieve plugin. ("Cant reach server"). I see that port 4190 is listening and I can telnet to that port: Connected to localhost. Escape character is '^]'. "IMPLEMENTATION" "Dovecot Pigeonhole" "SIEVE" "fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave" "NOTIFY" "mailto" "SASL" "PLAIN LOGIN" "STARTTLS" "VERSION" "1.0" OK "Dovecot ready." I'm not sure what else to check. Any help appreciated!

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[Dovecot] Panic: file index-mailbox-check.c: line 75 (index_mailbox_check_add): assertion failed: (box->notify_min_interval > 0)
by Kevin Holly 27 Jan '14

27 Jan '14

Hey guys, i have a weird problem i'm trying to fix since 5 months now, but i really couldn't find any explanation, why this happens and how it can be fixed. My client is Thunderbird, my dovecot version is 2.1.7-7 from the official Debian repo. If you want to see my config i'll grab all the fils together and send it to you. This is the error i'm always getting when my client tries to get new mails, which i want to get rid off: http://sprunge.us/NZhf Jan 25 11:49:30 old dovecot: auth-worker(15979): Debug: sql(root(a)hallowe.lt,81.217.212.85): query: SELECT password FROM mailbox WHERE username = 'root(a)hallowe.lt' Jan 25 11:49:30 old dovecot: auth: Debug: client out: OK#0111#011user=root(a)hallowe.lt Jan 25 11:49:30 old dovecot: auth-worker(15979): Debug: sql(root(a)hallowe.lt,81.217.212.85): SELECT CONCAT('maildir:/var/vmail/',maildir) AS mail, 1000 AS uid, 1000 AS gid FROM mailbox WHERE username = 'root(a)hallowe.lt' Jan 25 11:49:30 old dovecot: auth: Debug: master out: USER#0113983671297#011root@hallowe.lt#011mail=maildir:/var/vmail/hallowe.lt/root/#011uid=1000#011gid=1000 Jan 25 11:49:30 old dovecot: imap-login: Login: user=<root(a)hallowe.lt>, method=PLAIN, rip=81.217.212.85, lip=10.111.56.107, mpid=17606, TLS, session=<rQGqOsnwuABR2dRV> Jan 25 11:49:30 old dovecot: imap(root(a)hallowe.lt): Debug: Effective uid=1000, gid=1000, home= Jan 25 11:49:30 old dovecot: imap(root(a)hallowe.lt): Debug: quota: No quota setting - plugin disabled Jan 25 11:49:30 old dovecot: imap(root(a)hallowe.lt): Debug: maildir++: root=/var/vmail/hallowe.lt/root, index=, control=, inbox=/var/vmail/hallowe.lt/root, alt= Jan 25 11:49:30 old dovecot: imap(root(a)hallowe.lt): Panic: file index-mailbox-check.c: line 75 (index_mailbox_check_add): assertion failed: (box->notify_min_interval > 0) Jan 25 11:49:30 old dovecot: imap(root(a)hallowe.lt): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x4414a) [0x7f858118714a] -> /usr/lib/dovecot/libdovecot.so.0(+0x4418e) [0x7f858118718e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f858115e82a] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x99027) [0x7f858146b027] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x4ccc9) [0x7f858141ecc9] -> dovecot/imap(cmd_idle+0x66) [0x7f8581907c96] -> dovecot/imap(command_exec+0x3c) [0x7f858190dedc] -> dovecot/imap(+0x11f2e) [0x7f858190cf2e] -> dovecot/imap(+0x11fda) [0x7f858190cfda] -> dovecot/imap(client_handle_input+0x11d) [0x7f858190d23d] -> dovecot/imap(client_input+0x65) [0x7f858190db35] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f8581194016] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xa7) [0x7f8581194cc7] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f8581193a28] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f8581180483] -> dovecot/imap(main+0x297) [0x7f85819053e7] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f8580dd7ead] -> dovecot/imap(+0xa561) [0x7f8581905561] Jan 25 11:49:30 old dovecot: imap(root(a)hallowe.lt): Fatal: master: service(imap): child 17606 killed with signal 6 (core dumps disabled) I asked for this in the irc already but got no answer. I would be really happy if someone can help me with this. Thank you very much! Best regards, Kevin Holly - root(a)hallowe.lt - http://hallowe.lt/

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[Dovecot] outlook will not sync
by Eric Broch 27 Jan '14

27 Jan '14

Dovecot users list, I started having problems with Outlook not syncing with Dovecot a public imap folder upon issuing a send/receive in the client; eventually Outlook timed out, and I received the following error in the Dovecot log. Jan 23 09:20:23 imap(user(a)mydom.com): Error: FETCH [] for mailbox projects.myfolder UID 120 got too little data: 7744 vs 7759 Jan 23 09:20:23 imap(user(a)mydom.com): Error: Maildir filename has wrong W value: /home/vpopmail/domains/mydom.com/shared/projects/.myfolder/cur/1384292337.M440452P9788.mail.mydom.com,S=265901,W=269597:2,Sc Jan 23 09:20:23 imap(user(a)mydom.com): Error: Corrupted index cache file /home/vpopmail/domains/mydom.com/shared/projects/.myfolder/dovecot.index.cache: Broken virtual size for mail UID 120 Jan 23 09:20:23 imap(user@mydom): Info: Disconnected: FETCH failed bytes=175/270387 However, I've since removed the file manually, deleted the old folder and recreated it and Outlook will still not sync even in the absence of the above error. Has anyone seen this issue--slow to no Outlook performance with dovecot--before, and/or does anyone have a solution or point me in the right direction? Thanks! Eric I'm using dovecot 2.0.17 with the following configuration # 2.0.17 (684381041dc4+): /etc/dovecot/dovecot.conf # OS: Linux 2.6.18-371.1.2.el5 x86_64 CentOS release 5.10 (Final) auth_anonymous_username = anonymous auth_cache_negative_ttl = 1 hours auth_cache_size = 32 M auth_cache_ttl = 1 hours auth_debug = no auth_debug_passwords = no auth_default_realm = auth_failure_delay = 2 secs auth_first_valid_uid = 500 auth_gssapi_hostname = auth_krb5_keytab = auth_last_valid_uid = 0 auth_master_user_separator = auth_mechanisms = plain login digest-md5 cram-md5 auth_realms = auth_socket_path = auth-userdb auth_ssl_require_client_cert = no auth_ssl_username_from_cert = no auth_use_winbind = no auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ auth_username_format = %Lu auth_username_translation = auth_verbose = no auth_verbose_passwords = no auth_winbind_helper_path = /usr/bin/ntlm_auth auth_worker_max_count = 30 base_dir = /var/run/dovecot config_cache_size = 1 M debug_log_path = default_client_limit = 1000 default_idle_kill = 60 default_internal_user = dovecot default_login_user = dovenull default_process_limit = 100 default_vsz_limit = 256 M deliver_log_format = msgid=%m: %$ dict_db_config = director_doveadm_port = 0 director_mail_servers = director_servers = director_user_expire = 15 mins disable_plaintext_auth = yes dotlock_use_excl = yes doveadm_allowed_commands = doveadm_password = doveadm_proxy_port = 0 doveadm_socket_path = doveadm-server doveadm_worker_count = 0 first_valid_gid = 1 first_valid_uid = 89 hostname = imap_capability = imap_client_workarounds = imap_id_log = imap_id_send = imap_idle_notify_interval = 2 mins imap_logout_format = bytes=%i/%o imap_max_line_length = 64 k import_environment = TZ info_log_path = last_valid_gid = 0 last_valid_uid = 0 lda_mailbox_autocreate = no lda_mailbox_autosubscribe = no lda_original_recipient_header = libexec_dir = /usr/libexec/dovecot listen = *, :: lmtp_proxy = no lmtp_save_to_detail_mailbox = no lock_method = fcntl log_path = /var/log/dovecot.log log_timestamp = "%b %d %H:%M:%S " login_access_sockets = login_greeting = Dovecot toaster ready. login_log_format = %$: %s login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c login_trusted_networks = mail_access_groups = mail_attachment_dir = mail_attachment_fs = sis posix mail_attachment_hash = %{sha1} mail_attachment_min_size = 128 k mail_cache_fields = flags mail_cache_min_mail_count = 0 mail_chroot = mail_debug = no mail_fsync = optimized mail_full_filesystem_access = no mail_gid = mail_home = mail_location = mail_log_prefix = "%s(%u): " mail_max_keyword_length = 50 mail_max_lock_timeout = 0 mail_max_userip_connections = 20 mail_never_cache_fields = imap.envelope mail_nfs_index = no mail_nfs_storage = no mail_plugin_dir = /usr/lib64/dovecot mail_plugins = mail_privileged_group = mail_save_crlf = no mail_temp_dir = /tmp mail_uid = mailbox_idle_check_interval = 30 secs mailbox_list_index_disable = no maildir_copy_with_hardlinks = yes maildir_stat_dirs = no maildir_very_dirty_syncs = no master_user_separator = mbox_dirty_syncs = yes mbox_dotlock_change_timeout = 2 mins mbox_lazy_writes = yes mbox_lock_timeout = 5 mins mbox_min_index_size = 0 mbox_read_locks = fcntl mbox_very_dirty_syncs = no mbox_write_locks = dotlock fcntl mdbox_preallocate_space = no mdbox_rotate_interval = 0 mdbox_rotate_size = 2 M mmap_disable = no namespace { hidden = no inbox = yes list = yes location = prefix = INBOX. separator = . subscriptions = yes type = private } namespace { hidden = no inbox = no list = yes location = maildir:/home/vpopmail/domains/acemt.com/shared/projects prefix = projects. separator = . subscriptions = yes type = public } passdb { args = cache_key=%u webmail=127.0.0.1 deny = no driver = vpopmail master = no pass = no } plugin { quota = maildir } pop3_client_workarounds = pop3_enable_last = no pop3_fast_size_lookups = no pop3_lock_session = no pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s pop3_no_flag_updates = no pop3_reuse_xuidl = no pop3_save_uidl = no pop3_uidl_format = %08Xu%08Xv postmaster_address = protocols = imap quota_full_tempfail = no recipient_delimiter = + rejection_reason = Your message to <%t> was automatically rejected:%n%r rejection_subject = Rejected: %s sendmail_path = /usr/sbin/sendmail service anvil { chroot = empty client_limit = 0 drop_priv_before_exec = no executable = anvil extra_groups = group = idle_kill = 4294967295 secs privileged_group = process_limit = 1 process_min_avail = 1 protocol = service_count = 0 type = anvil unix_listener anvil-auth-penalty { group = mode = 0600 user = } unix_listener anvil { group = mode = 0600 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service auth-worker { chroot = client_limit = 1 drop_priv_before_exec = no executable = auth -w extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = service_count = 1 type = unix_listener auth-worker { group = mode = 0600 user = $default_internal_user } user = vsz_limit = 18446744073709551615 B } service auth { chroot = client_limit = 4096 drop_priv_before_exec = no executable = auth extra_groups = group = idle_kill = 0 privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = unix_listener auth-client { group = mode = 0600 user = } unix_listener auth-login { group = mode = 0600 user = $default_internal_user } unix_listener auth-master { group = mode = 0600 user = } unix_listener auth-userdb { group = mode = 0600 user = } unix_listener login/login { group = mode = 0666 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service config { chroot = client_limit = 0 drop_priv_before_exec = no executable = config extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = service_count = 0 type = config unix_listener config { group = mode = 0600 user = } user = vsz_limit = 18446744073709551615 B } service dict { chroot = client_limit = 1 drop_priv_before_exec = no executable = dict extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = service_count = 0 type = unix_listener dict { group = mode = 0600 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service director { chroot = client_limit = 0 drop_priv_before_exec = no executable = director extra_groups = fifo_listener login/proxy-notify { group = mode = 00 user = } group = idle_kill = 4294967295 secs privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = unix_listener director-admin { group = mode = 0600 user = } unix_listener login/director { group = mode = 00 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service dns_client { chroot = client_limit = 1 drop_priv_before_exec = no executable = dns-client extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = service_count = 0 type = unix_listener dns-client { group = mode = 0666 user = } unix_listener login/dns-client { group = mode = 0666 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service doveadm { chroot = client_limit = 1 drop_priv_before_exec = no executable = doveadm-server extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = service_count = 1 type = unix_listener doveadm-server { group = mode = 0600 user = } user = vsz_limit = 18446744073709551615 B } service imap-login { chroot = login client_limit = 0 drop_priv_before_exec = no executable = imap-login extra_groups = group = idle_kill = 0 inet_listener imap { address = port = 143 ssl = no } inet_listener imaps { address = port = 993 ssl = yes } privileged_group = process_limit = 0 process_min_avail = 0 protocol = imap service_count = 1 type = login user = $default_login_user vsz_limit = 18446744073709551615 B } service imap { chroot = client_limit = 1 drop_priv_before_exec = no executable = imap extra_groups = group = idle_kill = 0 privileged_group = process_limit = 1024 process_min_avail = 0 protocol = imap service_count = 1 type = unix_listener login/imap { group = mode = 0666 user = } user = vsz_limit = 18446744073709551615 B } service ipc { chroot = empty client_limit = 0 drop_priv_before_exec = no executable = ipc extra_groups = group = idle_kill = 0 privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = unix_listener ipc { group = mode = 0600 user = } unix_listener login/ipc-proxy { group = mode = 0600 user = $default_login_user } user = $default_internal_user vsz_limit = 18446744073709551615 B } service lmtp { chroot = client_limit = 1 drop_priv_before_exec = no executable = lmtp extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = lmtp service_count = 0 type = unix_listener lmtp { group = mode = 0666 user = } user = vsz_limit = 18446744073709551615 B } service log { chroot = client_limit = 0 drop_priv_before_exec = no executable = log extra_groups = group = idle_kill = 0 privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = log user = vsz_limit = 18446744073709551615 B } service pop3-login { chroot = login client_limit = 0 drop_priv_before_exec = no executable = pop3-login extra_groups = group = idle_kill = 0 inet_listener pop3 { address = port = 110 ssl = no } inet_listener pop3s { address = port = 995 ssl = yes } privileged_group = process_limit = 0 process_min_avail = 0 protocol = pop3 service_count = 1 type = login user = $default_login_user vsz_limit = 18446744073709551615 B } service pop3 { chroot = client_limit = 1 drop_priv_before_exec = no executable = pop3 extra_groups = group = idle_kill = 0 privileged_group = process_limit = 1024 process_min_avail = 0 protocol = pop3 service_count = 1 type = unix_listener login/pop3 { group = mode = 0666 user = } user = vsz_limit = 18446744073709551615 B } service ssl-params { chroot = client_limit = 0 drop_priv_before_exec = no executable = ssl-params extra_groups = group = idle_kill = 0 privileged_group = process_limit = 0 process_min_avail = 0 protocol = service_count = 0 type = startup unix_listener login/ssl-params { group = mode = 0666 user = } user = vsz_limit = 18446744073709551615 B } shutdown_clients = yes ssl = yes ssl_ca = ssl_cert = </var/qmail/control/servercert.pem ssl_cert_username_field = commonName ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL ssl_client_cert = ssl_client_key = ssl_key = </var/qmail/control/servercert.pem ssl_key_password = ssl_parameters_regenerate = 168 ssl_verify_client_cert = no submission_host = syslog_facility = mail userdb { args = cache_key=%u quota_template=quota_rule=*:backend=%q driver = vpopmail } valid_chroot_dirs = verbose_auth = no verbose_proctitle = no verbose_ssl = no version_ignore = no protocol imap { imap_client_workarounds = delay-newmail }

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[Dovecot] dsync failed
by Mario Arnold 26 Jan '14

26 Jan '14

Hello, Since i updated to 2.2.10 there is a problem with dsync: dsync -v -u test(a)vtlx.de backup $SSH -i $KEY -p $PORT $RHOST dsync -u test(a)vtlx.de dsync-remote(test(a)vtlx.de): Error: Mailbox INBOX: Failed to set attribute vendor/vendor.dovecot/pvt/server/sieve/files/t1: Internal attributes cannot be changed directly doveconf -n # 2.2.10 (6018854c8c91): /etc/dovecot/dovecot.conf # OS: Linux 3.12.6-domU i686 Debian jessie/sid ext3 ... 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 ... plugin { ... sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } ... protocols = " imap lmtp sieve pop3" Do I need to reconfigure something? Thank you for any hints -- 中華人民共和國

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[Dovecot] userdb maildir permission denied in 2.1.7
by Chris 26 Jan '14

26 Jan '14

Dear All, I'm using version 2.1.7 which currently ships with debian stable. I'd like to use userdb { driver = passwd-file args = username_format=%n /etc/dovecot/users default_fields = uid=vmail gid=vmail override_fields = skip = never result_failure = continue result_internalfail = continue result_success = return-ok } from [1]. The error message is: Jan 25 14:02:03 post1 dovecot: lda(chris): Error: user chris: Initialization failed: Namespace '': stat(/home/vmail/chris/Maildir) failed: Permission denied (euid=1000(chris) egid=1000(chris) missing +x perm: /home/vmail/chris, dir owned by 1001:1001 mode=0700) The skip and result_* commands aren't supported. My users file: chris:{MD5-CRYPT}$1$3uC3URg......:::/home/vmail/chris/:/bin/false:: Dovecot should access the Maildir with vmail:vmail (1001:1001) and not chris:chris (1000:1000)! Thank you in advance! - Chris [1] http://wiki2.dovecot.org/UserDatabase

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[Dovecot] dovecot produces messages dupes after nfs problems
by Patrick Westenberg 25 Jan '14

25 Jan '14

Hi everyone, some days ago I had trouble with my NFS-Server (high delays) which caused dovecot lmtp to deliver the same message several times (up to 10x). I recognized some old/unused .nfsXXXX files in the maildirs which seemed to be index files. I deleted them and everything was fine again. However, there are still 2-3 mailboxen where mails (old and new ones) are delivered multiple times. All duplicates have no "received from" headers. Seperate lmtp log shows only one delivery. Any hint or advice what might be wrong? Regards Patrick # 2.2.2: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.1 auth_mechanisms = plain login disable_plaintext_auth = no dotlock_use_excl = no hostname = mb02.wk-serv.net listen = 172.17.1.2 log_path = /var/log/dovecot.log login_trusted_networks = 172.17.1.3 172.17.1.4 mail_fsync = always mail_gid = vmail mail_home = /var/mail/%d/%n mail_location = maildir:~/Maildir mail_plugins = quota 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 ihave mmap_disable = yes namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Spamverdacht { auto = subscribe } mailbox Trash { auto = subscribe special_use = \Trash } prefix = INBOX. separator = . type = private } passdb { args = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { quota = dict:User quota::file:%h/Maildir/dovecot-quota quota_rule2 = INBOX.Trash:ignore quota_warning = storage=90%% quota-warning 90 %u quota_warning2 = storage=75%% quota-warning 75 %u sieve = ~/.dovecot.sieve sieve_after = /usr/local/etc/dovecot/sieve/sieve_after.sieve sieve_default = /usr/local/etc/dovecot/sieve/default.sieve sieve_dir = ~/sieve } protocols = imap pop3 lmtp sieve service auth { unix_listener auth-userdb { group = vmail mode = 0666 user = vmail } } service lmtp { executable = lmtp -L inet_listener lmtp { address = 172.17.1.2 port = 24 } } service managesieve-login { inet_listener sieve { port = 4190 } } service quota-warning { executable = script /usr/local/etc/dovecot/quota_warning.sh unix_listener quota-warning { user = vmail } user = root } userdb { args = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { info_log_path = /var/log/dovecot-lmtp.log mail_plugins = quota sieve } protocol imap { mail_max_userip_connections = 30 mail_plugins = quota imap_quota }

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[Dovecot] Architecture for large Dovecot cluster
by Murray Trainer 25 Jan '14

25 Jan '14

Hi All, I am trying to determine whether a mail server cluster based on Dovecot will be capable of supporting 500,000+ mailboxes with about 50,000 IMAP and 5000 active POP3 connections. I have looked at the Dovecot clustering suggestions here: http://blog.dovecot.org/2012/02/dovecot-clustering-with-dsync-based.html and some other Dovecot mailing list threads but I am not sure how many users such a setup will handle. I have a concern about the I/O performance of NFS in the suggested architecture above. One possible option available to us is to split up the mailboxes over multiple clusters with subsets of domains. Is there anyone out there currently running this many users on a Dovecot based mail cluster? Some suggestions or advice on the best way to go would be greatly appreciated. Thanks Murray

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[Dovecot] Dovecot on Solaris 10 Segmentation Fault
by Thomas 24 Jan '14

24 Jan '14

Hello, make check on Solaris 10 throws a segmentation fault. The error is independent of the compiler (SunStudio/GCC) and processor architecture (SPARC/x86) and 32 or 64 bit binary. Dovecot Version: 2.2.10 OS: Solaris 10/SPARC & x86 SunStudion Compiler cc: Sun C 5.10 SunOS_sparc Patch 141861-10 2012/11/07 GCC gcc version 3.4.3 (csl-sol210-3_4-branch+sol_rpath) The error occurs first in: src/lib-http/test-http-url Line 317/318: test_out(t_strdup_printf("url->user = %s", urlp->user), urlp->user == urlt->user); (if commenting out these lines, then it segfaults just in the next test) %make check <--- cut out lot of good output ---> http date invalid [42]: parse Sun Nov 6 08:49:37 0000 ............... : ok http date invalid [42] ............................................... : ok 0 / 150 tests failed http url valid [0]: http_url_parse(http://localhost) ................. : ok http url valid [0]: url->host_name = localhost ....................... : ok http url valid [0]: url->port = (unspecified) ........................ : ok http url valid [0]: url->host_ip = (unspecified) ..................... : ok /bin/bash: line 1: 28764 Segmentation Fault (core dumped) ./$bin gmake[2]: *** [check-test] Error 1 gmake[2]: Leaving directory `/data/obj/dovecot-2.2.10/src/lib-http' gmake[1]: *** [check-recursive] Error 1 gmake[1]: Leaving directory `/data/obj/dovecot-2.2.10/src' gmake: *** [check-recursive] Error 1 % pstack /var/core/core.test-http-url.28764 core '/var/core/core.test-http-url.28764' of 28764: ./test-http-url ff122d50 strlen (3365e, ffbff6fc, ffbfecf9, 0, 0, 0) + 50 ff191c3c vsnprintf (4a638, 10e, 33650, ffbff6f8, 7ffffc00, 2400) + 6c 0002be0c t_strdup_printf (4a638, 2340, 48118, 2e, 48110, e) + 6c 0001635c ???????? (0, 0, 47800, 335c4, 80000000, 40000000) 0001924c test_run (fffd3268, 2cc00, ffbff94c, 2380, 2000, 47e94) + 6c 00016008 _start (0, 0, 0, 0, 0, 0) + 108 % dbx test-http-url /var/core/core.test-http-url.28884 (dbx) examine 0xff122d5c: strlen+0x005c: 0x98132101 (dbx) regs current frame: [1] g0-g1 0x00000000 0x00000000 0x00000000 0x0004a638 g2-g3 0x00000000 0x0004a3bc 0x00000000 0x0004a3b8 g4-g5 0x00000000 0x0004a3c8 0x00000000 0x00000270 g6-g7 0x00000000 0x00000000 0x00000000 0xff272a00 o0-o1 0x00000000 0x00000000 0x00000000 0xfffffaf0 o2-o3 0x00000000 0x00000000 0x00000000 0xffbff798 o4-o5 0x00000000 0x00000000 0x00000000 0x0000002b o6-o7 0x00000000 0xffbfe920 0x00000000 0xff18f498 l0-l1 0x00000000 0x00000073 0x00000000 0x00000000 l2-l3 0x00000000 0x00000000 0x00000000 0x00001000 l4-l5 0x00000000 0x00000000 0x00000000 0x00000000 l6-l7 0x00000000 0xff236c99 0x00000000 0x00000000 i0-i1 0x00000000 0x0003365e 0x00000000 0xffbff8dc i2-i3 0x00000000 0xffbfeed9 0x00000000 0x00000000 i4-i5 0x00000000 0x00000000 0x00000000 0x00000000 i6-i7 0x00000000 0xffbff7b0 0x00000000 0xff191c3c y 0x00000000 0x00000000 ccr 0x00000000 0xfe401005 pc 0x00000000 0xff122d50:strlen+0x50 ld [%o2], %o1 npc 0x00000000 0xff122d54:strlen+0x54 sethi %hi(0x1010000), %o4 (dbx) dis 0xff122d3c 0xff122d3c: strlen+0x003c: be,pn %icc,strlen+0xcc ! 0xff122dcc 0xff122d40: strlen+0x0040: btst 255, %o1 0xff122d44: strlen+0x0044: be,pn %icc,strlen+0xcc ! 0xff122dcc 0xff122d48: strlen+0x0048: inc %o2 0xff122d4c: strlen+0x004c: inc %o2 0xff122d50: strlen+0x0050: ld [%o2], %o1 0xff122d54: strlen+0x0054: sethi %hi(0x1010000), %o4 0xff122d58: strlen+0x0058: sethi %hi(0x80808000), %o5 0xff122d5c: strlen+0x005c: bset 257, %o4 0xff122d60: strlen+0x0060: bset 128, %o5 % truss -f ./test-http-url <--- cut out the beginning of output ---> 28884: open("/platform/SUNW,SPARC-Enterprise-T5220/lib/libc_psr.so.1", O_RDONLY) = 3 28884: mmap(0x00010000, 9244, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ALIGN, 3, 0) = 0xFF0E0000 28884: munmap(0xFF0E2000, 1052) = 0 28884: close(3) = 0 28884: getpid() = 28884 [28883] 28884: brk(0x0004A3A8) = 0 28884: brk(0x000543A8) = 0 28884: sysinfo(SI_HOSTNAME, "badile", 255) = 7 28884: getpid() = 28884 [28883] 28884: ioctl(1, TCGETA, 0xFFBFF664) = 0 28884: fstat64(1, 0xFFBFF580) = 0 http url valid [0]28884: write(1, " h t t p u r l v a l".., 18) = 18 : http_url_parse(http://localhost)28884: write(1, " : h t t p _ u r l _ p".., 34) = 34 ................. : ok 28884: write(1, " . . . . . . . . . . .".., 24) = 24 http url valid [0]28884: write(1, " h t t p u r l v a l".., 18) = 18 : url->host_name = localhost28884: write(1, " : u r l - > h o s t _".., 28) = 28 ....................... : ok 28884: write(1, " . . . . . . . . . . .".., 30) = 30 http url valid [0]28884: write(1, " h t t p u r l v a l".., 18) = 18 : url->port = (unspecified)28884: write(1, " : u r l - > p o r t ".., 27) = 27 ........................ : ok 28884: write(1, " . . . . . . . . . . .".., 31) = 31 http url valid [0]28884: write(1, " h t t p u r l v a l".., 18) = 18 : url->host_ip = (unspecified)28884: write(1, " : u r l - > h o s t _".., 30) = 30 ..................... : ok 28884: write(1, " . . . . . . . . . . .".., 28) = 28 28884: Incurred fault #6, FLTBOUNDS %pc = 0xFF122D50 28884: siginfo: SIGSEGV SEGV_MAPERR addr=0x00000000 28884: Received signal #11, SIGSEGV [default] 28884: siginfo: SIGSEGV SEGV_MAPERR addr=0x00000000 % apptrace -f ./test-http-url <--- cut out the beginning of output ---> 28897:-> test-http-url -> libc.so.1:int fputs(const char * = 0x33618 "url->host_ip = (unspecified)", FILE * = 0xfef2759c) : url->host_ip = (unspecified) 28897:<- test-http-url -> libc.so.1:fputs() = 0x1c 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x20, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x20 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0x2e, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0x2e 28897:-> test-http-url -> libc.so.1:size_t fwrite(const void * = 0x33e28, size_t = 0x1, size_t = 0x3, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:fwrite() = 0x3 28897:-> test-http-url -> libc.so.1:size_t fwrite(const void * = 0x33e2c, size_t = 0x1, size_t = 0x2, FILE * = 0xfef2759c) 28897:<- test-http-url -> libc.so.1:fwrite() = 0x2 28897:-> test-http-url -> libc.so.1:int __flsbuf(int = 0xa, FILE * = 0xfef2759c) ..................... : ok 28897:<- test-http-url -> libc.so.1:__flsbuf() = 0xa 28897:-> test-http-url -> libc.so.1:int vsnprintf(char * = 0x4a638 "", size_t = 0x10e, const char * = 0x33650 "url->user = %s", va_list = 0xffbff998) apptrace: ./test-http-url: Segmentation Fault(Core dump) Any help about this? Cheers Thomas

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