- dovecot - dovecot.org

Split storage & solr
by Daniel Miller 30 Jan '20

30 Jan '20

Is it possible to setup the following: 1. Primary mailserver with SMTP solutions and Dovecot. 2. Primary server will store recent mails. 3. Secondary server for archival storage and Solr. So I'm not looking for a distributed cluster - simply a splitting of designated functions. Clients would only be connecting to the primary server. I know Dovecot supports an alternate storage location - that's what made me think this was possible. What I'm more uncertain of is Solr. My (probably flawed) thinking is to take advantage of a low-cost high-availability cloud server to provide primary email services. Dovecot, Postfix, and even ASSP don't have significant memory or processor requirements by themselves - especially for my smaller user base. However - storage in the cloud can be at a premium. Therefore I'm thinking of continuing to self-host the archives. And my own server has the raw power & memory to handle Solr easily. What's triggering this is our ISP's quality has been deteriorating - and the alternates don't appear much better. Initial visualization would have a VPN/SSH connection between the servers, and NFS mounting my storage to the cloud server for archives. If our connection drops - in theory "current" mail handling is unaffected. My concerns/questions: 1. If Dovecot is unable to reach the remote Solr - upon re-connection will Solr be told about the new messages to index? Or do I need to setup a periodic re-scan? 2. Is there a "better" method of accessing the archive storage area than NFS? Either a different network file system or is there a way to do it with Dovecot directly? 3. What am I not taking into consideration in this setup that you think will be a problem? --- Daniel

2 1

IMAP compatible Notes app for Android
by Rupert Gallagher 29 Jan '20

29 Jan '20

Hello! Please share your favourite open-source Notes app for Android, as I am struggling to find one compatible with IMAP. Thank you, and happy 2020!

2 2

imap panic: file array.c: line 10 (array_idx_modifiable_i)
by mabi 29 Jan '20

29 Jan '20

Hello, I just migrated a few dovecot IMAP mailbox (Maildir format) from a Dovecot 2.1.7 (Debian 7) mailbox server to a Dovecot 2.3.4 (Debian 10) mailbox server and one particular mailbox does not work properly and generates the following error log entries: Jan 21 09:39:21 Panic: imap(EMAIL_ADDRESS)<7741><UTsrWKKcasoAAAAAAAAAAAAAAAAAAAAB>: file array.c: line 10 (array_idx_modifiable_i): assertion failed: (idx * array->element_size < array->buffer->used) Jan 21 09:39:21 Error: imap(EMAIL_ADDRESS)<7741><UTsrWKKcasoAAAAAAAAAAAAAAAAAAAAB>: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb15b) [0x7fa18def215b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb1f1) [0x7fa18def21f1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a001) [0x7fa18de61001] -> /usr/lib/dovecot/libdovecot.so.0(+0x493bf) [0x7fa18de603bf] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xde920) [0x7fa18e084920] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_commit+0x22f) [0x7fa18e096a3f] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x85b4b) [0x7fa18e02bb4b] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x8862a) [0x7fa18e02e62a] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x88937) [0x7fa18e02e937] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_storage_sync_init+0xa3) [0x7fa18e02ece3] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x57) [0x7fa18e002497] -> dovecot/imap [EMAIL_ADDRESS ::1 UID STORE](imap_sync_init+0x91) [0x563d342e16e1] -> dovecot/imap [EMAIL_ADDRESS ::1 UID STORE](cmd_sync_delayed+0x236) [0x563d342e25f6] -> dovecot/imap [EMAIL_ADDRESS ::1 UID STORE](client_handle_input+0x268) [0x563d342d58f8] -> dovecot/imap [EMAIL_ADDRESS ::1 UID STORE](client_input+0x7e) [0x563d342d5d6e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7fa18df0860f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7fa18df09c06] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7fa18df086ac] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7fa18df08810] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fa18de88fd3] -> dovecot/imap [EMAIL_ADDRESS ::1 UID STORE](main+0x325) [0x563d342c7bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7fa18dc7309b] -> dovecot/imap [EMAIL_ADDRESS ::1 UID STORE](_start+0x2a) [0x563d342c7d8a] Jan 21 09:39:21 Fatal: imap(EMAIL_ADDRESS)<7741><UTsrWKKcasoAAAAAAAAAAAAAAAAAAAAB>: master: service(imap): child 7741 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) Does anyone have any idea what could be going wrong here? Maybe I need to run some kind of conversion or re-generate some indexes? Best regards, Mabi

3 10

Emails in Public folders aren't showing up in Outlook
by Barry Ralphs 29 Jan '20

29 Jan '20

Hi, I've inherited our Devocot setup from someone else & don't know much about it. I can view our Public email folders fine in Thunderbird, but when I try it with Outlook 2013, I can see the folder structure fine, but when I click on a folder it doesn't show any emails. Here's a screen shot of Outlook: https://imgur.com/CHIDJOr And Thunderbird: https://imgur.com/WxmsUTM Here's the version info & config output: # 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf # OS: Linux 3.10.0-1062.1.1.el7.x86_64 x86_64 CentOS Linux release 7.7.1908 (Core) ext4 # Hostname: nikola auth_mechanisms = plain login auth_verbose = yes debug_log_path = syslog disable_plaintext_auth = no info_log_path = syslog mail_location = maildir:/home/%n/Maildir mbox_write_locks = fcntl namespace TMpublic { location = maildir:/iscsi/public/Maildir:INDEX=~/Maildir/public/index prefix = Public/ separator = / subscriptions = no type = public } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Sent { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = separator = / type = private } passdb { driver = pam } ssl_cert = </etc/pki/dovecot/certs/dovecot.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } Any suggestions on how to get the Public folders to show the emails in Outlook? Thanks for the help.

1 0

error: include: personal location for included script `foo is unavailable
by Rudolf Schmidt 28 Jan '20

28 Jan '20

Hi, I want to split my active script into smaller chunks but I have issues with the include directive. My doveconf -n is # 2.3.9.2 (cf2918cac): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.9 (db4e9a2f) # OS: Linux 5.1.15-arch1-1-ARCH x86_64 Arch Linux auth_mechanisms = plain login auth_verbose = yes mail_location = maildir:~/mail 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 mime foreverypart extracttext passdb { args = scheme=plain /etc/dovecot/plain.pwd driver = passwd-file } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = imap lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service stats { unix_listener stats-writer { mode = 0777 } } ssl = required ssl_cert = </etc/letsencrypt/live/domain.com/fullchain.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = uid=vmail gid=vmail home=/var/mail/virtual/%Ld/%Ln driver = static } protocol lmtp { mail_plugins = " sieve" postmaster_address = rs@domain } I have a script vendors.sieve that I put into ~/sieve (my mails I store in ~/mails) and it does not find the script. include :personal "vendors"; Any ideas? -- Best Regards, Mit freundlichen Grüßen, Rudolf Schmidt

1 1

dict passdb: redis nil values
by Eirik Rye 28 Jan '20

28 Jan '20

Hi, I am trying to implement a dict lookup for disabled accounts, where both the passdb lookup and the disabled lookup is done in the same passdb. I was hoping that this configuration would work: passdb { name = redis driver = dict args = /etc/dovecot/dovecot-redis.conf.ext } --- uri = redis:host=127.0.0.1 key disabled { key = users/%u/disabled/%s format = value default_value = } key user { key = users/%u format = json } passdb_objects = user passdb_fields { fail = %{dict:disabled} } Unfortunately, this will always set the fail passdb_field regardless of whether the disabled key returns its empty default_value. Removing the default_value setting will cause the passdb lookup to fail if key lookup fails, as mentioned in the documentation. Is there a way to have the dict driver handle redis nil values similarly to how the sql driver handles NULL values? A working alternative I found is to set an invalid password if the disabled key is set: passdb_fields { password = %{if;%{dict:disabled};eq;;%{dict:user.password};} } However, this feels hacky. It also makes the auth-worker to log the following error (despite it being functional): dovecot: auth-worker(16229): Error: redis(test,127.0.0.1,<Kd3zJDOdfs1/AAAB>): Multiple password values not supported Any other suggestions, or should I simply fall back to using a separate passdb with deny=yes? Best regards, Eirik

1 0

Dovecot authentication through proxy
by Daniel Niewerth 28 Jan '20

28 Jan '20

Hi everybody, I run two redundant Dovecot servers with a shared Maildir on a GlusterFS volume and a SQL authentication backend based on a mirrored MariaDB database. Because of the splitbrain situation I would like to add two Dovecot Director as proxies. Since a few days I am trying to get the setup running. In the meantime I have achieved that the clients can successfully authenticate on the proxy and that the client connections are forwarded to the backend servers. Unfortunately I still have the problem that no authentication attempts are made on the backend servers. Can someone explain me how to solve this problem? I have read that it is eventually possible to work with Master Users. But I guess that won't work for me, because I use the mailcrypt plugin and the client password is also the password for the encryption key. Best regards Daniel ### Proxy Log ### ############### Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth-worker(20760): Debug: sql(***(a)***.**,192.168.1.100,<sNTHFdOcbeDAqAFk>): Finished passdb lookup Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth-worker(20760): Debug: conn unix:auth-worker (pid=20753,uid=112): auth-worker<1>: Finished Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth: Debug: sql(***(a)***.**,192.168.1.100,<sNTHFdOcbeDAqAFk>): username changed ***(a)***.** -> *** Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth: Debug: sql(***,192.168.1.100,<sNTHFdOcbeDAqAFk>): username changed *** -> ***(a)***.** Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth: Debug: sql(***(a)***.**,192.168.1.100,<sNTHFdOcbeDAqAFk>): Finished passdb lookup Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth: Debug: auth(***(a)***.**,192.168.1.100,<sNTHFdOcbeDAqAFk>): Auth request finished Jan 23 19:48:21 vsrv-***-prx01 dovecot: auth: Debug: client passdb out: OK#0111#011user=***@***.**#011proxy#011ssl=any-cert#011starttls=any-cert#011lip=192.168.20.49#011lport=993#011pass=<hidden> Jan 23 19:48:21 vsrv-***-prx01 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lip Jan 23 19:48:21 vsrv-***-prx01 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lport ### Backend Log ### ################### Jan 23 18:48:51 vsrv-***-mta01 dovecot: imap-login: Disconnected (no auth attempts in 30 secs): user=<>, rip=192.168.20.49, lip=192.168.20.28, TLS handshaking: Connection closed, session=<r9yRF9OcZODAqBQx> Jan 23 18:48:51 vsrv-***-mta01 dovecot: imap-login: Disconnected (no auth attempts in 30 secs): user=<>, rip=192.168.20.49, lip=192.168.20.28, TLS handshaking: Connection closed, session=<4C+SF9OcauDAqBQx> Jan 23 18:48:51 vsrv-***-mta01 dovecot: imap-login: Disconnected (no auth attempts in 30 secs): user=<>, rip=192.168.20.49, lip=192.168.20.28, TLS handshaking: Connection closed, session=<KDGSF9OcZuDAqBQx> Jan 23 18:48:51 vsrv-***-mta01 dovecot: imap-login: Disconnected (no auth attempts in 30 secs): user=<>, rip=192.168.20.49, lip=192.168.20.28, TLS handshaking: Connection closed, session=<lwKTF9OcbuDAqBQx> ### Proxy Config ### #################### # 2.3.9.2 (cf2918cac): /etc/dovecot/dovecot.conf # OS: Linux 4.15.0-74-generic x86_64 Ubuntu 18.04.3 LTS # Hostname: vsrv-***-prx01 auth_debug = yes director_mail_servers = 192.168.20.28 192.168.20.29 director_servers = 192.168.20.49:9090 192.168.20.58:9090 disable_plaintext_auth = no mail_location = mbox:~/mail:INBOX=/var/mail/%u 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 = /etc/dovecot/dovecot-sql.conf driver = sql } passdb { driver = pam } protocols = " imap" service director { inet_listener { port = 9090 } unix_listener login/director { mode = 0666 } } service imap-login { executable = imap-login director } service pop3-login { executable = pop3-login director } ssl = required ssl_cert = </etc/dovecot/private/***-**-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:kE$ ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol lmtp { auth_socket_path = director-userdb } ### Backend Config ### ###################### # 2.3.9.2 (cf2918cac): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.9 (db4e9a2f) # OS: Linux 4.15.0-72-generic x86_64 Ubuntu 18.04.3 LTS # Hostname: vsrv-**-mta01.**.**.***.** auth_debug = yes auth_mechanisms = plain login mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_fsync = always mail_gid = vmail mail_home = /var/vmail/mailboxes/%d/%n mail_location = maildir:~/mail:LAYOUT=fs mail_nfs_index = yes mail_nfs_storage = yes mail_plugins = " notify mail_crypt" 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 mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve mmap_disable = yes namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } 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 { imapsieve_mailbox1_before = file:/var/vmail/sieve/global/learn-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Spam imapsieve_mailbox2_before = file:/var/vmail/sieve/global/learn-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Spam imapsieve_mailbox2_name = * mail_crypt_curve = brainpoolP512r1 mail_crypt_require_encrypted_user_key = # hidden, use -P to show it mail_crypt_save_version = 2 quota = maildir:User quota quota_exceeded_message = Benutzer %u hat das Speichervolumen überschritten. / User %u has exhausted allowed storage space. sieve = file:/var/vmail/sieve/%d/%n/scripts;active=/var/vmail/sieve/%d/%n/active-script.sieve sieve_before = /var/vmail/sieve/global/spam-global.sieve sieve_global_extensions = +vnd.dovecot.pipe sieve_pipe_bin_dir = /usr/bin sieve_plugins = sieve_imapsieve sieve_extprograms } 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/letsencrypt/live/******/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 = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { imap_idle_notify_interval = 29 mins mail_max_userip_connections = 20 mail_plugins = " notify mail_crypt quota imap_quota imap_sieve" } protocol lmtp { mail_plugins = " notify mail_crypt sieve" postmaster_address = postmaster(a)***.** } -- This email was Malware checked by vsrv-dus6-fwl01

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Number of imap-login processes always keeps growing, never goes down
by Jasper Siepkes 26 Jan '20

26 Jan '20

Hi all! I've bumped into an issue which Dovecot which has me a bit stumped; All of a sudden (ie. no obvious changes made to the config as far as I know) Dovecot seems to never stop 'imap-login' processes. This continues to the point where it will hit the 'process_limit'. For a 50-ish user install the limit was set to 100 but I increased it to 512. The only thing this changes it that Dovecot takes a little longer to hit the limit. I started having this problem with Dovecot version 2.3.2.1. After which I updated to the latest version of Dovecot (2.3.9.2) to see if that would fix my problem. However I'm still experiencing the same issue. For a bit of context; We use Dovecot with Open-Xchange where users login via OIDC, get a token and then use that token with Dovecot with the 'oauthbearer' auth method. However users can also login via a username / password combo stored in LDAP for clients that don't support 'oauthbearer' (ie. about all the mail clients ;-). We run Dovecot on SmartOS (ie. Illumos, a Solaris derivative). Oddly enough 'doveadm' is under the impression there are only 3 users loggedin (when there are 512 imap-login processes). I think 'doveadm who' doesn't show users who are authenticated via an token (oauthbearer) because I only see 3 users and I don't see my own user which is logged in via Open-Xchange by using oauthbearer as auth method. I've anonimized the output but you get the idea: ----8<-------------------- # doveadm who username # proto (pids) (ips) foo1(a)foo.nl 2 imap (78393 78391) (52.XXX.XXX.XXX) foo2(a)foo.nl 2 imap (72548 72547) (52.XXX.XXX.XXX) foo3(a)foo.nl 2 imap (480893 481231) (54.XXX.XXX.XXX 54.XXX.XXX.XXX) ----8<-------------------- I don't know if the above issue is related to my problem but the oauthbearer sessions not showing up seems like a bug? Meanwhile there are 512 Dovecot imap-login processes: ----8<-------------------- # ptree | grep imap-login | wc -l 513 ----8<-------------------- I realise that the 'imap-login' process also works as a IMAP proxy and that it stays alive during the entire session of the client since it handles the TLS part of the connection. However there are nowhere near 512 connections active. As far as I know IMAP doesn't support multiplexing (ie. multiple IMAP sessions in a single TCP connection) so with 512 imap-login proccess I would expect to see a lot more connections then I'm seeing: ----8<-------------------- # netstat -a TCP: IPv4 Local Address Remote Address Swind Send-Q Rwind Recv-Q State -------------------- -------------------- ------ ------ ------ ------ ----------- *.ssh *.* 0 0 1048576 0 LISTEN dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 52.XXX.XXX.XXX.53136 178176 0 1049580 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 52.XXX.XXX.XXX.53188 126848 0 1049580 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 83.XXX.XXX.XXX.64845 132352 0 1048960 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.2.7937 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.3.4983 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.2.34369 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.3.15041 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.2.49044 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.3.6340 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 10.100.2.2.11331 16384 0 1049800 0 CLOSE_WAIT dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 52.XXX.XXX.XXX.49920 94976 0 1049580 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.58569 10.100.3.84.ldap 1049792 0 1049800 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.33749 10.100.3.84.ldap 1049792 0 1049800 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps 52.XXX.XXX.XXX.49966 46464 0 1049580 0 ESTABLISHED *.4190 *.* 0 0 1048576 0 LISTEN *.24 *.* 0 0 1048576 0 LISTEN *.imap2 *.* 0 0 1048576 0 LISTEN *.imaps *.* 0 0 1048576 0 LISTEN dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps ec2-54-210-254-232.compute-1.amazonaws.com.32892 107904 0 1049800 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.ssh 10.101.2.14.59256 64128 35 1049880 0 ESTABLISHED dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl.imaps ec2-54-167-34-137.compute-1.amazonaws.com.3890 549632 0 1049800 0 ESTABLISHED TCP: IPv6 Local Address Remote Address Swind Send-Q Rwind Recv-Q State If --------------------------------- --------------------------------- ------ ------ ------ ------ ----------- ----- *.ssh *.* 0 0 1048576 0 LISTEN Active UNIX domain sockets Address Type Vnode Conn Local Address Remote Address ----8<-------------------- This is the running Dovecot config: ----8<-------------------- # doveconf -n -c /etc/dovecot/dovecot.conf # 2.3.9.2 (cf2918cac): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.9 (db4e9a2f) # OS: SunOS 5.11 i86pc # Hostname: dovecot-1.inst.sp-prod.nl1.cns.supersecretcorp.nl auth_failure_delay = 3 secs auth_mechanisms = plain oauthbearer xoauth2 base_dir = /var/run/dovecot/ disable_plaintext_auth = no first_valid_uid = 1000 hostname = imap.supersecretcorp.nl instance_name = dovecot-1 listen = * lmtp_rcpt_check_quota = yes log_path = /dev/stderr mail_attachment_dir = /var/lib/dovecot/attachments mail_attachment_fs = sis-queue /var/lib/dovecot/attachments/queue:posix mail_attachment_hash = %{sha256} mail_attribute_dict = file:~/mdbox/dovecot-attributes mail_gid = vmail mail_home = /var/lib/dovecot/vmail/%d/%n mail_location = mdbox:~/mdbox mail_plugins = " quota notify" mail_server_admin = mailto:it@ask.supersecretcorp.nl mail_temp_dir = /var/lib/dovecot/tmp 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 mime foreverypart extracttext metric imap_command_fetch_ok { event_name = imap_command_finished filter { name = FETCH tagged_reply_stat = OK } } metric imap_command_list { event_name = imap_command_finished filter { name = LIST tagged_reply_state = OK } } metric imap_command_search { event_name = imap_command_finished filter { name = SEARCH tagged_reply_stat = OK } } metric imap_command_select { event_name = imap_command_finished filter { name = SELECT tagged_reply_state = OK } } metric imap_select_no { event_name = imap_command_finished filter { name = SELECT tagged_reply_state = NO } } metric imap_select_no_notfound { event_name = imap_command_finished filter { name = SELECT tagged_reply = NO*Mailbox doesn't exist:* } } metric storage_http_gets { categories = storage event_name = http_request_finished filter { method = get } } namespace inbox { hidden = no inbox = yes list = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox "Sent objects" { special_use = \Sent } mailbox Spam { special_use = \Junk } mailbox Trash { special_use = \Trash } prefix = separator = / subscriptions = yes type = private } passdb { args = /etc/dovecot/dovecot-oauth2.conf.ext driver = oauth2 mechanisms = oauthbearer xoauth2 } passdb { args = /etc/dovecot/dovecot-ldap-passdb.conf.ext driver = ldap } plugin { push_notification_driver = ox:url=http://#hidden_use-P_to_show#@open-xchange.svc.sp-prod.nl1.cns.supersecretcorp.nl:8009/preliminary/http-notify/v1/notify user_from_metadata quota = count:User quota quota_rule2 = Trash:storage=+25M quota_vsizes = yes sieve = file:~/sieve;active=~/.dovecot.sieve sieve_max_actions = 32 sieve_max_redirects = 4 sieve_max_script_size = 1M sieve_quota_max_scripts = 500 sieve_quota_max_storage = 10M sieve_vacation_send_from_recipient = yes } postmaster_address = postmaster(a)supersecretcorp.nl protocols = imap lmtp sieve service auth-worker { user = $default_internal_user } service auth { unix_listener auth-userdb { group = vmail mode = 0770 user = dovecot } user = $default_internal_user } service imap-login { process_limit = 512 process_min_avail = 1 service_count = 1 } service imap { process_limit = 512 } service lmtp { inet_listener lmtp { address = * port = 24 } user = vmail } service managesieve-login { inet_listener sieve { port = 4190 } process_min_avail = 0 service_count = 1 } service managesieve { process_limit = 256 } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_client_ca_dir = /opt/local/etc/openssl/certs ssl_dh = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 submission_host = postfix.svc.sp-prod.nl1.cns.supersecretcorp.nl:25 userdb { args = /etc/dovecot/dovecot-ldap-userdb.conf.ext driver = ldap } protocol imap { mail_plugins = " quota notify imap_quota" ssl_cert = </etc/dovecot/pki/imap.supersecretcorp.nl.crt ssl_key = # hidden, use -P to show it } protocol submission { ssl_cert = </etc/dovecot/pki/smtp.supersecretcorp.nl.crt ssl_key = # hidden, use -P to show it } protocol lmtp { mail_plugins = quota sieve notify push_notification postmaster_address = postmaster(a)supersecretcorp.nl } remote 10.100.2.0/23 { protocol imap { imap_metadata = yes } } ----8<-------------------- Hoping anyone can offer any insights! Kind regards, Jasper

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Lookup master userdb used with GSSAPI causes auth-worker to report "Error: BUG: PASSL had invalid passdb ID"
by Filip Matijević 25 Jan '20

25 Jan '20

Hello to everybody, I'm in the process of setting up test mail server (Ubuntu 19.10 amd64 running as VM under Hyper-V) and got stuck on configuring master user authentication. I use GSSAPI authentication in parallel with PLAIN/LOGIN (pam backend that authenticates against my Active Directory domain) and this works as intended. I then tried adding simple static master passdb that simply returns nopassword='y' and k5principals=... for test and it also works OK. Sadly, using any other backend (I've tried lua and sql) for master passdb instead of static in combination with GSSAPI client causes auth-worker to report "Error: BUG: PASSL had invalid passdb ID". I took a look at the code and my best guess is that in case of GSSAPI + sql/lua master passdb we end up with call to auth_worker_handle_passl with id that auth_worker_handle_passl considers invalid. Continuing with guesswork, I imagine that since GSSAPI doesn't really need passdb in config "virtual" passdb is generated "on the fly" in code. I even tried explicitly defining static passdb with mechanisms set to gssapi to try to force dovecot to use that one instead but it didn't make any difference. At the same time, below configuration works OK when client authenticates with plain/login. dovecot -n (some settings omitted for brevity): # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf auth_gssapi_hostname = $ALL auth_krb5_keytab = /etc/dovecot/dovecot.keytab auth_master_user_separator = * auth_mechanisms = plain login gssapi passdb { args = /etc/dovecot/dovecot-sql-master.conf driver = sql master = yes } passdb { driver = pam } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } Any help is appreciated, even if it requires code changes - I can set up machine with everything needed for building/debugging the source code. Thanks, Filip

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sieve size match with multiple of 4GB not matching (BUG?)
by Matthias Lay 24 Jan '20

24 Jan '20

Hi, I have noticed a strange behaviour when using size matches with GB in sieve. If I use filter that matches mails smaller then 4, or 8GB it does not match in any case. same filter matches with 3,5,6,7 GB example filter: require "vnd.dovecot.debug"; if allof (size :under 4G) { debug_log "MATCH"; } else { debug_log "NO MATCH"; } # sieve-filter -u johnd filter.sieve INBOX >> Filtering message: ID: <5167DFC8.8040207@XXXXXX> Date: Fri, 12 Apr 2013 12:19:52 +0200 Size: 1820898 bytes Subject: Fwd: Multi-media mail demonstration info: DEBUG: NO MATCH. ************************************************************************** same mail with this sieve rule: if allof (size :under 5G) { debug_log "MATCH"; } else { debug_log "NO MATCH"; } # sieve-filter -u johnd filter.sieve INBOX >> Filtering message: ID: <5167DFC8.8040207@XXXXXX> Date: Fri, 12 Apr 2013 12:19:52 +0200 Size: 1820898 bytes Subject: Fwd: Multi-media mail demonstration info: DEBUG: MATCH. same for M. 4096M => NO MATCH 4097M => MATCH Greetz Matze

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