- dovecot - dovecot.org

API command for ACL Delete
by Rhodri Jones 27 May '21

27 May '21

I asked previously for info about the API options for doveadm acl delete but I think my question was misunderstood. I want to know the command I would use (with curl for instance) that corresponds with: doveadm acl delete -u <targetmailbox> INBOX user=<targetuser> Using the python client for doveadm http API I can see the valid parameters but I don't seem to be able to get the correct syntax. (doveadm) aclDelete ? invalid parameter: ? valid parameters for aclDelete: - userFile (string) - allUsers (boolean) - mailbox (string) - user (string) - socketPath (string) - id (string) --

2 2

API command for ACL Delete
by Rhodri Jones 26 May '21

26 May '21

Can anyone tell me how to do the following using the API. doveadm acl get -u <targetmailbox> INBOX doveadm acl delete -u <targetmailbox> INBOX user=$user Are the ACL API options documented somewhere? Thanks --

2 1

Re: [EXT] Re: Dovecot Stats for Logwatch
by Plutocrat 26 May '21

26 May '21

On 26/05/2021 14.33, Aki Tuomi wrote: > I am not sure what is not working for you... > does `doveadm stats dump` work? a) Before any stats config it works without error, but gives no output. doveadm stats dump metric_name field count sum min max avg median stddev %95 b) If I then enable conf.d/95-stats.conf containing service stats { inet_listener http { port = 9900 } } metric client_connections { filter = event=client_connection_finished } metric auth_success { filter = (event=auth_request_finished AND success=yes) } metric mail_delivery { filter = event=mail_delivery_finished } ... it works but doesn't seem to collect any data, even if left for 24 hours doveadm stats dump metric_name field count sum min max avg median stddev %95 client_connections duration 0 0 0 0 0.00 0 0.00 0 auth_success duration 0 0 0 0 0.00 0 0.00 0 mail_delivery duration 0 0 0 0 0.00 0 0.00 0 c) If I then enable the bits of config that I'm informed will populate the data repository: # In 10-master.conf mail_plugins = stats # In 20-imap.conf protocol imap { mail_plugins = $mail_plugins quota imap_quota } # In 20-pop.conf protocol pop3 { mail_plugins = $mail_plugins quota } ... it then complains doveadm stats dump Fatal: Plugin 'stats' not found from directory /usr/lib/dovecot/modules d) I just changed the in in 10-master-conf to reference old-stats instead of stats, based on my new knowledge and it doesn't complain about the missing module any more. But I'm still not collecting data after 30 mins. doveadm stats dump metric_name field count sum min max avg median stddev %95 client_connections duration 0 0 0 0 0.00 0 0.00 0 auth_success duration 0 0 0 0 0.00 0 0.00 0 mail_delivery duration 0 0 0 0 0.00 0 0.00 0 I can do wget http://localhost:9900/metrics and I just get a file that says VERSION stats-reader-server 2 0 At this point I'm thinking I'll just write a bash script to parse the logs, but thought I'd see it through as it might help other intrepid dovecot users. P.

2 3

Problem with per-user \Seen flag on public folder
by Bartek Szady 26 May '21

26 May '21

Hello I have noticed that when per-user \Seen flag is configured dovecot do not respond properly to 'store' command. eg.: =============== 42 uid store 6 +Flags (\Seen) 42 OK Store completed (0.001 + 0.000 secs). 43 IDLE + idling DONE 43 OK Idle completed (3.204 + 3.203 + 3.203 secs). =============== Thunderbird is confused by this and read emails turns into unread after a while. When global flag is stored dovecot responds as it should, I think: =============== 32 uid store 3 -Flags (\Flagged) * 2 FETCH (UID 3 FLAGS ()) 32 OK Store completed (0.002 + 0.000 + 0.001 secs). 33 IDLE + idling DONE 33 OK Idle completed (5.362 + 5.362 + 5.361 secs). =============== When per-user \Seen flag is not configured: =============== 25 uid store 6 +Flags (\Seen) * 4 FETCH (UID 6 FLAGS (\Seen)) 25 OK Store completed (0.002 + 0.000 + 0.001 secs). 26 IDLE + idling * OK Still here DONE 26 OK Idle completed (65.076 + 65.076 + 65.076 secs). =============== # doveconf -n # 2.3.14 (cee3cbc0d): dovecot-int.conf # OS: Linux 5.1.16 x86_64 # Hostname: #hidden auth_mechanisms = plain login base_dir = /var/run/dovecot-int default_internal_group = dovecot1 default_internal_user = dovecot1 default_login_user = dovenull1 disable_plaintext_auth = no login_log_format = int %$: %s mail_debug = yes mail_location = maildir:~/Mail/Maildir mail_log_prefix = "int-%s(%u)<%{pid}><%{session}>: " namespace { inbox = yes location = prefix = separator = / type = private } passdb { args = scheme=MD5-CRYPT /etc/dovecot/passwd-int driver = passwd-file } passdb { args = scheme=MD5-CRYPT /etc/dovecot/virtual-int driver = passwd-file } passdb { driver = pam } plugin { acl = vfile } protocols = pop3 imap service auth { user = root } service imap-login { group = dovenull1 inet_listener imap { address = <ips> } user = dovecot1 } service pop3-login { group = dovenull1 inet_listener pop3 { address = <ips> } } service stats { unix_listener stats-writer { mode = 0660 user = pubmail } } ssl_cert = </var/lib/openssl/certs/imap-int.crt ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/virtual-int driver = passwd-file } userdb { driver = passwd } protocol imap { mail_plugins = acl imap_acl namespace { location = maildir:/srv/mail/public:LAYOUT=fs:INDEXPVT=~/Mail/public prefix = publiczne/ separator = / subscriptions = no type = public } ssl = yes } Bartek

2 1

What am I doing wrong?
by Ron Garret 26 May '21

26 May '21

I’m trying to run an imapsieve script when a user sends a message (this is part of a spam filter and I want to use outgoing messages to train the filter on good content). This is my config: plugin { sieve_plugins = sieve_imapsieve sieve_extprograms sieve = file:/var/mail/sieve/incoming.sieve # From elsewhere to Junk imapsieve_mailbox1_name = Junk imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_before = file:/var/mail/sieve/spam.sieve # From Junk to elsewhere imapsieve_mailbox2_name = * imapsieve_mailbox2_from = Junk imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_before = file:/var/mail/sieve/ham.sieve # Sent imapsieve_mailbox3_name = 'Sent Messages' imapsieve_mailbox3_causes = APPEND imapsieve_mailbox3_before = file:/var/mail/sieve/sent.sieve sieve_pipe_bin_dir = /var/mail/sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment } The first two scripts (for training spam and ham respectively) both work. Once upon a time I had the third one working as well, but apparently I changed something that made it break and I have no idea what that could be. (Yes, I need to get my code into revision control. I’ve already beaten myself up over that more than once.) The problem appears to be in the config, not the sieve script, because the script is never compiled into a .svbin while the other scripts in the same directory are compiled. But just for the record, this is the sieve script: > ➔ cat /var/mail/sieve/sent.sieve > require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"]; > > if environment :matches "imap.user" "*" { > set "username" "${1}"; > } > > pipe :copy "train.py" [ "sent", "${username}" ]; Does anyone here see the problem that I’m missing? Thanks, rg

1 1

sqlite + IMAP Authentication issues - user unknown
by Scott Edwards 26 May '21

26 May '21

Hello, I'm not on the maillist, please reply all. It's been a few years since I've setup a mail server (I feel like a noob!). The following syslog message is isolating the auth issues. I have sqlite, and want to keep it this way. I don't see more than a few mailboxes to setup until sometime later, but if it does grow, I'll stand up PostgreSQL. FQDN is 'localcar.repair'. May 24 21:01:45 localcar dovecot: auth: Debug: client in: AUTH#0116#011PLAIN#011service=imap#011secured=tls#011session=Rb8dshnD/Gwv2Ixo#011lip=45.33.2.221#011rip=47.216.140.104#011lport=993#011rport=27900#011local_name=localcar.repair#011ssl_cipher=TLS_AES_128_GCM_SHA256#011ssl_cipher_bits=128#011ssl_pfs=KxANY#011ssl_protocol=TLSv1.3#011resp=<hidden> May 24 21:01:49 localcar dovecot: auth-worker(20614): Debug: sql(webmaster-foo(a)localcar.repair,47.216.140.104,<Rb8dshnD/Gwv2Ixo>): query: SELECT password, userid as user FROM users WHERE userid = 'webmaster-foo' AND domain = 'localcar.repair' May 24 21:01:49 localcar dovecot: auth-worker(20614): sql(webmaster-foo(a)localcar.repair,47.216.140.104,<Rb8dshnD/Gwv2Ixo>): unknown user (given password: topsecret) May 24 21:01:51 localcar dovecot: auth: Debug: client passdb out: FAIL#0116#011user=webmaster-l5buyjuxao8@localcar.repair#011original_user=webmaster-foo@localcar.repair May 24 21:01:51 localcar dovecot: imap-login: Debug: Ignoring unknown passdb extra field: original_user root@localcar:/etc/dovecot# sqlite3 users SQLite version 3.27.2 2019-02-25 16:06:06 Enter ".help" for usage hints. sqlite> .schema CREATE TABLE users ( userid VARCHAR(128) NOT NULL, domain VARCHAR(128) NOT NULL, password VARCHAR(64) NOT NULL, home VARCHAR(255) NOT NULL, uid INTEGER NOT NULL, gid INTEGER NOT NULL ); sqlite> select * from users; webmaster-foo|localcar.repair|topsecret|/tmp|1000|1000 Thunderbird naturally says "Login to server localcar.repair with username webmaster-foo(a)localcar.repair failed. [ ok ] Restarting dovecot (via systemctl): dovecot.service. root@localcar:/etc/dovecot# dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: localcar.repair auth_debug = yes auth_verbose = yes auth_verbose_passwords = yes mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_privileged_group = mail 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.ext driver = sql } protocols = " imap lmtp" ssl_cert = </etc/dovecot/private/dovecot.pem ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } Thank you, Scott

2 2

Help with "doveadm" - Socket ?
by White, Daniel E. (GSFC-770.0)[NICS] 25 May '21

25 May '21

doveadm [-f formatter] mailbox status [-A|-u user] [-S socket_path] [-t] fields mailbox ... Where do I find this "socket_path", please ? I am trying to untangle a very old CentOS 6 instance. Thanks in advance.

4 7

Panic: file ostream-zlib.c
by Bouke J. Henstra | ICT Diensten 24 May '21

24 May '21

Hello, At the moment I am investigating an issue (probably) related to Dovecot /zlib. I am hoping someone is willing to help. Thanks. #Background information Every time a certain user checked her e-mail the following errors would appear in "/var/log/mail.err" (please find the lines below). I am using zlib (please find the details in the configuration below). I did include the Dovecot version, OS details, CPU details and file system details in this message. I did migrate the whole mail domain to Microsoft 365 (as the user has an active subscription and had to move on - for me this was the fastest method to help the user in this case). The mailbox still exists on the server. I suspect there's file corruption somewhere? I am routing mail from the domain to xxxxx-xx.mail.protection.outlook.com (just to be sure that the user doesn't miss anything - mx records have been updated). I did notice that the user had issues with receiving mail. Outlook would keep trying to fetch mail and was hard to close (user had to kill Outlook through the task manager - after migrating to Microsoft 365 this problem is resolved too). I would like to find out what causes/caused this problem. I would like to understand the problem and would like to try to avoid future problems. I did run "dovecot-sysreport" but I did notice the data is not anonymized. I can anonymize the details and submit those if required. #Dovcecot version root@s1:/# dovecot --version 2.3.4.1 (f79e8e7e4) #Operating system root@s1:/# uname -a Linux s1 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux root@s1:/# cat /etc/debian_version 10.9 #CPU Architecture root@s1:/# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian #File System ext4 errors=continue,usrjquota=quota.user,grpjquota=quota.group,jqfmt=vfsv0 0 1 #Errors May 17 22:37:11 s1 dovecot: imap(xxxx(a)xxxxx.xx)<18570><MxyEjIzCs8pSoYVo>: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0 || zstream->ostream.error_handling_disabled) May 17 22:37:11 s1 dovecot: imap(xxxx(a)xxxxx.xx)<18570><MxyEjIzCs8pSoYVo>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7f45c109973b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7f45c10997d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7f45c1008199] -> /usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x3c6f) [0x7f45c0dc3c6f] -> /usr/lib/dovecot/libdovecot.so.0(+0xffd5e) [0x7f45c10bdd5e] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_destroy+0x16) [0x7f45c10bdd86] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x18d) [0x7f45c11d046d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x4d) [0x7f45c11a867d] -> dovecot/imap(+0x10f36) [0x5606b3187f36] -> dovecot/imap(+0x10ff3) [0x5606b3187ff3] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7f45c10afbef] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7f45c10b11e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7f45c10afc8c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7f45c10afdf0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f45c1030123] -> dovecot/imap(main+0x325) [0x5606b3187bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7f45c0e1309b] -> dovecot/imap(_start+0x2a) [0x5606b3187d8a] May 17 22:37:11 s1 dovecot: imap(xxxx(a)xxxxx.xx)<18570><MxyEjIzCs8pSoYVo>: Fatal: master: service(imap): child 18570 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) May 17 22:54:52 s1 dovecot: imap(xxxx(a)xxxxx.xx)<20321><HrbpyozCn8tSoYVo>: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0 || zstream->ostream.error_handling_disabled) May 17 22:54:52 s1 dovecot: imap(xxxx(a)xxxxx.xx)<20321><HrbpyozCn8tSoYVo>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7fda4a55473b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7fda4a5547d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7fda4a4c3199] -> /usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x3c6f) [0x7fda4a27ec6f] -> /usr/lib/dovecot/libdovecot.so.0(+0xffd5e) [0x7fda4a578d5e] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_destroy+0x16) [0x7fda4a578d86] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x18d) [0x7fda4a68b46d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x4d) [0x7fda4a66367d] -> dovecot/imap(+0x10f36) [0x5559c9e82f36] -> dovecot/imap(+0x10ff3) [0x5559c9e82ff3] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7fda4a56abef] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7fda4a56c1e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7fda4a56ac8c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7fda4a56adf0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fda4a4eb123] -> dovecot/imap(main+0x325) [0x5559c9e82bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7fda4a2ce09b] -> dovecot/imap(_start+0x2a) [0x5559c9e82d8a] May 17 22:54:52 s1 dovecot: imap(xxxx(a)xxxxx.xx)<20321><HrbpyozCn8tSoYVo>: Fatal: master: service(imap): child 20321 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) #Config root@s1:/opt/scripts# dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: s1.xxxxx.xx auth_mechanisms = plain login disable_plaintext_auth = no imap_capability = +SPECIAL-USE XLIST listen = *,[::] lmtp_rcpt_check_quota = yes log_timestamp = "%Y-%m-%d %H:%M:%S " mail_max_userip_connections = 100 mail_plugins = quota zlib mail_privileged_group = vmail 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 = separator = . } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { quota = dict:user::file:/var/vmail/%d/%n/.quotausage quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO sieve = /var/vmail/%d/%n/.sieve sieve_after = /var/vmail/%d/%n/.ispconfig.sieve sieve_before = /var/vmail/%d/%n/.ispconfig-before.sieve sieve_max_actions = 100 sieve_max_redirects = 25 sieve_max_script_size = 2M zlib_save = gz zlib_save_level = 9 } protocols = imap pop3 lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } user = root } service imap-login { client_limit = 1000 process_limit = 512 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service quota-status { client_limit = 1 executable = quota-status -p postfix unix_listener /var/spool/postfix/private/quota-status { group = postfix mode = 0660 user = postfix } } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/postfix/smtpd.cert ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { auth_verbose = yes mail_plugins = quota zlib quota imap_quota } protocol pop3 { auth_verbose = yes mail_plugins = quota zlib quota pop3_uidl_format = %08Xu%08Xv } protocol lda { mail_plugins = quota zlib sieve quota postmaster_address = postmaster(a)xxxxx.xx } protocol lmtp { mail_plugins = quota zlib quota sieve postmaster_address = postmaster(a)xxxxx.xx -- Kind regards, Bouke J. Henstra

2 1

BUG report
by Oleg Pyzin 23 May '21

23 May '21

Hello! I've compiled Dovecot without any error, but couldn't run it. ------------- The error is: ------------- Feb 09 19:22:50 master: Panic: kevent(EV_ADD, READ, 21) failed: Invalid argument Feb 09 19:22:50 master: Error: Raw backtrace: 0 libdovecot.0.dylib 0x00216d58 askpass + 136 -> 1 libdovecot.0.dylib 0x00216e78 backtrace_get + 36 -> 2 libdovecot.0.dylib 0x00221fe8 i_set_debug_file + 248 -> 3 libdovecot.0.dylib 0x002220fc default_fatal_handler + 56 -> 4 dovecot 0x000039a0 dup2_append + 1884 -> 5 libdovecot.0.dylib 0x00221a8c i_panic + 120 -> 6 libdovecot.0.dylib 0x0022c13c io_loop_handle_add + 244 -> 7 libdovecot.0.dylib 0x0022f2c8 timeout_add_short + 416 -> 8 libdovecot.0.dylib 0x0022f574 io_add_to + 76 -> 9 dovecot 0x00007dd4 service_monitor_stop_close + 288 -> 10 dovecot 0x00008cdc services_monitor_start + 840 -> 11 dovecot 0x00004aa4 main + 3336 -> 12 dovecot 0x00003048 start + 68 ------------- dovecot -n: admin.MacPPC[/opt/local/var/log/dovecot] <467-7> $ sudo dovecot -n # 2.3.11.3 (): /opt/local/etc/dovecot/dovecot.conf # OS: Darwin 9.8.0 Power Macintosh hfs # Hostname: MacPPC.Dlink default_client_limit = 50 default_internal_group = _dovecot default_process_limit = 10 default_vsz_limit = 128 M info_log_path = /opt/local/var/log/dovecot/info listen = * log_path = /opt/local/var/log/dovecot/error login_plugin_dir = /opt/local/lib/dovecot mail_location = maildir:/private/srv/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 = } protocols = imap pop3 service imap { process_limit = 32 } service pop3 { process_limit = 32 } service submission { process_limit = 32 } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } ------------------------------ Will be a very gratefull for the help, Oleg

1 0

Issue with dovecot v2.3.4.1 and mail_crypt plugin. Email received, but not encrypted on disk until moved out of root Maildir folder. IMAP child crashes when mail is read from folder message was moved to.
by Ben Burk 23 May '21

23 May '21

Recently I attempted enabling the mail_crypt plugin on a per user basis as summarized below: uname -a Linux smtp 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux dovecot --version 2.3.4.1 (f79e8e7e4) $ cat /etc/dovecot/conf.d/10-mailcrypt.conf mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_plugins = $mail_plugins mail_crypt plugin { mail_crypt_curve = secp521r1 mail_crypt_save_version = 2 mail_crypt_require_encrypted_user_key = yes } cat dovecot-sql.conf.ext driver = mysql connect = host=127.0.0.1 dbname=VVVVV user=WWWWWW password=XXXXXX user_query = SELECT user, \ concat('*:bytes=', quota) AS quota_rule, \ '/mail/%d/%n' AS home, \ uid, gid \ FROM virtual_users WHERE user='%u'; password_query = SELECT user, password, crypt as userdb_mail_crypt_save_version, '%w' AS userdb_mail_crypt_private_password FROM virtual_users WHERE user='%u'; dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: smtp.burk.tech auth_verbose = yes mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_location = maildir:~/Maildir:LAYOUT=fs mail_plugins = quota mail_crypt mail_privileged_group = mail namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = type = private } passdb { driver = pam } plugin { mail_crypt_curve = secp521r1 mail_crypt_require_encrypted_user_key = # hidden, use -P to show it mail_crypt_save_version = 2 } protocols = imap service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { mode = 0777 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl = required ssl_cert = </etc/dovecot/fullchain.cer.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes userdb { driver = passwd } verbose_ssl = yes protocol lmtp { hostname = smtp.burk.tech postmaster_address = postmaster(a)burk.tech } protocol imap { mail_max_userip_connections = 50 } The issue I've noticed occurs when the following settings above are enabled and mail is received into the root of the Maildir fs, then mail is moved to another folder (including a file being deleted). Upon a client's retrieval of messages from the folder where mail was moved to, the log spits out the following: May 22 19:18:15 smtp dovecot: imap-login: Login: user=<ben>, method=PLAIN, rip=XXX.XXX.XXX.XXX, lip=YYY.YYY.YYY.YYY, mpid=31682, TLS, session=<7oASZPPCkN9EdIVp> May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Mailbox Trash: Saving mail: save: read() failed: read(/mail/burk.tech/ben/Maildir/Receipts/cur/1621724316.M515979P30417.smtp,S=2903,W=2964:2,S) failed: Private key not available: Cannot decrypt key f9e7a6b9dd24535a29915fb46336047b07ae5b9fea5eda8e03cf9a8fa009f88b: Cannot decrypt key 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87: Password not available May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Mailbox Trash: copy: i_stream_read() failed: read(/mail/burk.tech/ben/Maildir/Receipts/cur/1621724316.M515979P30417.smtp,S=2903,W=2964:2,S) failed: Private key not available: Cannot decrypt key f9e7a6b9dd24535a29915fb46336047b07ae5b9fea5eda8e03cf9a8fa009f88b: Cannot decrypt key 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87: Password not available May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Mailbox Trash: Saving mail: read() failed: read(/mail/burk.tech/ben/Maildir/Receipts/cur/1621724316.M515979P30417.smtp,S=2903,W=2964:2,S) failed: Private key not available: Cannot decrypt key f9e7a6b9dd24535a29915fb46336047b07ae5b9fea5eda8e03cf9a8fa009f88b: Cannot decrypt key 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87: Password not available (read reason=) May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Panic: file ostream-encrypt.c: line 631 (o_stream_encrypt_close): assertion failed: (estream->finalized || estream->ctx_sym == NULL || estream->ostream.ostream.stream_errno != 0) May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7fdb3ce7273b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7fdb3ce727d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7fdb3cde1199] -> /usr/lib/dovecot/libdovecot.so.0(+0x49276) [0x7fdb3cde0276] -> /usr/lib/dovecot/libdovecot.so.0(+0xffd5e) [0x7fdb3ce96d5e] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_destroy+0x16) [0x7fdb3ce96d86] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x18d) [0x7fdb3cfa946d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x4d) [0x7fdb3cf8167d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_storage_copy+0x122) [0x7fdb3cf73f22] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5badc) [0x7fdb3cf81adc] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_move+0x31) [0x7fdb3cf81c11] -> dovecot/imap(+0x128f5) [0x563bd267a8f5] -> dovecot/imap(command_exec+0x70) [0x563bd2687dc0] -> dovecot/imap(+0x1e3f2) [0x563bd26863f2] -> dovecot/imap(+0x1e494) [0x563bd2686494] -> dovecot/imap(client_handle_input+0x1b5) [0x563bd2686845] -> dovecot/imap(client_input+0x7e) [0x563bd2686d6e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7fdb3ce88bef] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7fdb3ce8a1e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7fdb3ce88c8c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7fdb3ce88df0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fdb3ce09123] -> dovecot/imap(main+0x325) [0x563bd2678bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7fdb3cbf209b] -> dovecot/imap(_start+0x2a) [0x563bd2678d8a] May 22 19:18:15 smtp dovecot: imap-login: Debug: SSL alert: close notify May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Fatal: master: service(imap): child 31682 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) My keys for the user are as follows: ben(a)smtp.burk.tech :~$ doveadm mailbox cryptokey list -U doveadm(ben): Error: net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied Folder Active Public ID yes 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87 I've checked and it appears that the mail as its received into the root of Maildir is not initially encrypted. It is stored plaintext. However, when the mail is moved, it is then properly encrypted. ben(a)smtp.burk.tech :~/Maildir/cur$ file 1621726534.31820_1.smtp\:2\, 1621726534.31820_1.smtp:2,: SMTP mail, ASCII text ben(a)smtp.burk.tech :~/Maildir/Receipts/cur$ file 1621726595.M343917P30832.smtp\,S\=2927\,W\=2988\:2\,S 1621726595.M343917P30832.smtp,S=2927,W=2988:2,S: MailCrypt -- Ben Burk BURK.TECH System Administrator

1 0