February 2022 - dovecot

JWT tokens, timestamps and doubles (microseconds)
by Aleš Krajník 14 Feb '22

14 Feb '22

Hi all, I am having troubles with OAuth2 setup with local introspection of JWT tokens. This happens, when the JWT tokens contain timestamps as doubles, with microseconds, for example with the following payload: { "aud": "caf65d650022e3eb7cce518e7526a39f", "jti": "8291efed41d2ce65ec5c59a4cbcaa285f2ca37d5b2785da56de66adbd1b8eef65495bc 599be5ac56", "iat": 1644833538.793359, "nbf": 1644833538.79336, "exp": 1644833838.773605, "sub": "ales(a)example.com", "scope": "email" } Such a JWT token produces the following error: dovecot_1 | Feb 14 10:10:46 auth: Info: oauth2(ales(a)example.com,192.168.224.2,<xWZFoffXYujAqOAC>): oauth2 failed: Local validation failed: Malformed 'exp' field According to the RFC, the timestamps seem to be allowed to contain non- integer values: NumericDate A JSON numeric value representing the number of seconds from 1970- 01-01T00:00:00Z UTC until the specified UTC date/time, ignoring leap seconds. This is equivalent to the IEEE Std 1003.1, 2013 Edition [POSIX.1] definition "Seconds Since the Epoch", in which each day is accounted for by exactly 86400 seconds, other than that non-integer values can be represented. See RFC 3339 [RFC3339] for details regarding date/times in general and UTC in particular. (https://datatracker.ietf.org/doc/html/draft-ietf-oauth-json-web-token-32#se…) After removing the fractions, the token works well. This seems to be happening here: https://github.com/dovecot/core/blob/master/src/lib-oauth2/oauth2-jwt.c#L41 If you agree for this to be a bug, can I fill in a bug report somewhere? Thank you! Best, Aleš

2 1

wondering if I configured sieve vacation correctly
by Marc 14 Feb '22

14 Feb '22

I have a user who feels compelled to use the vacation as autoreply to confirm that a message has been received. The down side is of course, that if spam/abuse messages get through the spam filters, this can get 'messy'. Currently I am getting these ndr's as postmaster(?). But I was not actually expecting this. I would expect that the mailbox with the autoreply would get this report. The vacation is configured like this[1], my question is. What am I doing wrong that this ndr is not ending up in the users mailbox? Can it be the from is not correctly configured/set at the time the vacation message is being sent? [1] require ["vacation"]; # rule:[cccccccccc] if true { vacation :addresses "test(a)test.com" :from "test(a)test.com" text: dddddddddddddd } [2] Return-Path: <> Received: from aaaaa (localhost [127.0.0.1]) by aaaaa (8.14.7/8.14.7) with ESMTP id 21BDgaPj014029 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for <postyk(a)hm.edu>; Fri, 11 Feb 2022 14:42:36 +0100 Received: (from root@localhost) by aaaaa (8.14.7/8.14.7/Submit) id 21BDgamD014028 for postyk(a)hm.edu; Fri, 11 Feb 2022 14:42:36 +0100 X-Sieve: Pigeonhole Sieve 0.4.24 (124e06aa) Message-ID: <dovecot-sieve-1644586956-19320-0@bbbb> Date: Fri, 11 Feb 2022 14:42:36 +0100 From: test(a)test.com To: <postyk(a)hm.edu>

1 1

Backup procedures
by Jorge Bastos 13 Feb '22

13 Feb '22

Howdy, I have a particular situation where I have about 5 users using a large account in IMAP, and I have the need to backup the account daily or weekly or so. I was thinking about to copy the whole directory, each email is a file, it could probably work, but the dovecot index files would be damaged/wrong. Is there a tool that could perform a backup (ex: yesterday), and when I inserted that backup, it just insert the emails and folders that were deleted today? Thanks in advanced, Jorge

5 8

LMTP Crash with Dovecot 2.3.18
by Bryan Jacobs 13 Feb '22

13 Feb '22

Dear Dovecot Users, Upgrading from Dovecot 2.3.14 to 2.3.18 on Arch gives me the following dump immediately (100% of the time) on every LMTP handler invocation. Of course I'm using Squat for FTS (yes, I understand it's deprecated...). plugin { fts = squat fts_squat = partial=4 full=4 fts_autoindex = yes sieve = file:/mnt/mail/%Ln/sieve;active=/mnt/mail/%Ln/.dovecot.sieve master_user = %u } lmtp[592878]: segfault at 50 ip 00007f5355153eed sp 00007fff45b87ba0 error 4 in lib20_fts_plugin.so[7f5355153000+11000] Code: 00 4c 8d 05 f9 17 01 00 48 8d 0d ae 19 01 00 31 c0 ba 53 01 00 00 48 8d 35 f2 17 01 00 48 8d 3d 49 01 01 00 ff 15 53 7f 03 00 <48> 8b 04 25 50 00 00 00 0f 0b be 2a 01 00 00 8d 3d cf 17 01 00 > Feb 08 01:23:20 mail systemd-coredump[592880]: [🡕] Process 592878 (lmtp) of user 0 dumped core. > > Module linux-vdso.so.1 with build-id 0f9bd6468a3798a863048e6cd927830796809b46 > Module libffi.so.8 with build-id f90d8b734f6de9b25faedb8cbfab7054dafc0a42 > Module libp11-kit.so.0 with build-id cc372ea3c28c4d3dfc633b4d2e933c8584d2af16 > Module libcrypt.so.2 with build-id 5d45bdae438c16d52364b23d70bd5041ad070b0b > Module librt.so.1 with build-id 75484da2d6f1515189eefa076e0a40328834cd16 > Module libnss_systemd.so.2 with build-id 56da60140e2f0e47044a141378608146f6fd9bb8 > Module libnss_files.so.2 with build-id 1a36dfc01d3a1010b2ee79766a24a8090a3266d5 > Module libdovecot-sieve.so.0 with build-id a358da532b8ef09782b5a97a951df8ab5c8eb0db > Module lib90_sieve_plugin.so with build-id eb52835c5c3d1034617e745995b950484faed909 > Module lib21_fts_squat_plugin.so with build-id cc731fa9bf9cac2f890bbc1da598e958cb465d52 > Module libicudata.so.70 with build-id e1dcc2a88cfaafed882d09c90c668af0eed4efed > Module libgcc_s.so.1 with build-id 7f8508bb914546ada778809b64b99d234337d835 > Module libm.so.6 with build-id 2b8fd1f869ecab4e0b55e92f2f151897f6818acf > Module libstdc++.so.6 with build-id 9b5eeeb149bf3c4efe787fb398b44f00507aec87 > Module libicuuc.so.70 with build-id 2e245c2bf12f95fd8ab79b3a4be99524677cbd70 > Module libicui18n.so.70 with build-id 95af755fca990df26753a7d720b8e3ae24270e42 > Module lib20_fts_plugin.so with build-id 5b44deef3cd93f2cdac9a38ab3f5c4f1a2f48d40 > Module lib10_quota_plugin.so with build-id 5fa33175575dcf45f4aead56c701fe58a19f0df8 > Module libpthread.so.0 with build-id 07c8f95b4f3251d08550217ad8a1f31066229996 > Module libcrypto.so.1.1 with build-id 4c926b672d97886b123e03a008387aecf0786de4 > Module libssl.so.1.1 with build-id 1024424ab33a3767da03f4fdb1fc1b02479f160f > Module libssl_iostream_openssl.so with build-id ba2cf9015fbabf8459896bd584379f2f566aaa51 > Module ld-linux-x86-64.so.2 with build-id 040cc3dd10461562f177df39e3be2f3704258c3c > Module libdl.so.2 with build-id 5abc547e7b0949f89f3c0e21ab0c8331a7440a8a > Module libc.so.6 with build-id 4b406737057708c0e4c642345a703c47a61c73dc > Module libdovecot.so.0 with build-id 3f68ab1f1e0bffceea1c130e6b46f799eea45522 > Module libdovecot-storage.so.0 with build-id 3bf1e7c355c0c6184165e209f67b3a6627355401 > Module libdovecot-lda.so.0 with build-id 54cc9d9face18809a95ccd5ee643330eed997d8b > Module lmtp with build-id 7cc9238bb78e35771572aa3e31bdecf1cda5d754 > Stack trace of thread 592878: > #0 0x00007f5355153eed n/a (lib20_fts_plugin.so + 0x9eed) > #1 0x00007f535515db30 fts_mailbox_allocated (lib20_fts_plugin.so + 0x13b30) > #2 0x00007f535595eb6d hook_mailbox_allocated (libdovecot-storage.so.0 + 0x60b6d) > #3 0x00007f53559598ec mailbox_alloc (libdovecot-storage.so.0 + 0x5b8ec) > #4 0x00007f5355959b5e mailbox_alloc_for_user (libdovecot-storage.so.0 + 0x5bb5e) > #5 0x00007f5355a6d790 mail_deliver_save_open (libdovecot-lda.so.0 + 0x4790) > #6 0x00007f5355a6dbdc mail_deliver_save (libdovecot-lda.so.0 + 0x4bdc) > #7 0x00007f5355a6e39a mail_deliver (libdovecot-lda.so.0 + 0x539a) > #8 0x0000563d3a90bc2d lmtp_local_default_deliver (lmtp + 0x8c2d) > #9 0x0000563d3a90c39f lmtp_local_data (lmtp + 0x939f) > #10 0x0000563d3a90acc1 client_default_cmd_data (lmtp + 0x7cc1) > #11 0x0000563d3a90aa31 cmd_data_continue (lmtp + 0x7a31) > #12 0x00007f535579c3bf n/a (libdovecot.so.0 + 0x6d3bf) > #13 0x00007f535579cc46 n/a (libdovecot.so.0 + 0x6dc46) > #14 0x00007f53557a023e smtp_server_command_call_hooks (libdovecot.so.0 + 0x7123e) > #15 0x00007f53557a07f1 smtp_server_command_next_to_reply (libdovecot.so.0 + 0x717f1) > #16 0x00007f53557a5b5b n/a (libdovecot.so.0 + 0x76b5b) > #17 0x00007f535584469f io_loop_call_io (libdovecot.so.0 + 0x11569f) > #18 0x00007f5355844787 io_loop_handler_run (libdovecot.so.0 + 0x115787) > #19 0x00007f5355844919 io_loop_run (libdovecot.so.0 + 0x115919) > #20 0x00007f53557b31d8 master_service_run (libdovecot.so.0 + 0x841d8) > #21 0x0000563d3a909606 main (lmtp + 0x6606) > #22 0x00007f535557bb25 __libc_start_main (libc.so.6 + 0x27b25) Thanks, Bryan Jacobs

2 1

Dovecot installation problem (libssl_iostream_openssl.so is not portable!)
by Dimitri 11 Feb '22

11 Feb '22

Hi there, i finally solved the problem. On my server i always used openssl compiled from source with the following configuration options: > ./config --prefix=/test/dep/openssl --openssldir=/test/dep/openssl no-deprecated no-ssl The error when i try to compile dovecot tell about undefined references: > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `OBJ_cleanup' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_CTX_need_tmp_RSA' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_load_error_strings' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `ENGINE_cleanup' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `ERR_free_strings' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `EVP_cleanup' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_library_init' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `CRYPTO_cleanup_all_ex_data' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_CTX_set_tmp_rsa_callback' > > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `OpenSSL_add_all_algorithms' for example "OBJ_cleanup". So i check these functions on the openssl documentation an saw the notice about "deprecated function since OpenSSL 1.1.0" Therefore i recompiled openssl with the following configuration options: > ./config --prefix=/test/dep/openssl --openssldir=/test/dep/openssl --api=1.0.0 After that the compilation of dovecot was successful. It seems that dovecot still uses now deprecated functions from openssl befor version 1.1.0 Can anyone tell me when dovecot doesn't need this deprecated functions anymore? Thanks!

1 0

Hanging doveadm-server processes with dsync replication
by Sebastian Marske 10 Feb '22

10 Feb '22

Dear Dovecot mailing list, after updating Dovecot from 2.3.16 to 2.3.18 on a dsync-replicated server there are hanging doveadm-server processes piling up over time, eventually resulting in some of the affected users being shown as out of sync. Our setup is based on FreeBSD 13, ZFS and Dovecot (we use custom packages built with poudriere) with master/master replication using dsync. However, we use a shared ip (Carp), so that only one server is actually active. Please see the output of "doveconf -n" at the end for our config. Starting from an in-sync state, I updated Dovecot on the inactive server. Occasionally, Dovecot logs messages like: Feb 8 15:02:15 myhost dovecot[99800]: doveadm(someuser)<2090><ZLayIal3AmIqCAAADKIhQg>: Error: write(<local>) failed: Timed out after 60 seconds These occur for an increasing number of users (maybe 30 after two days), but not for every user (there are >4800 users on that server) and also only once for every affected user. Here's some more information about the process/user from the log entry: # doveadm replicator dsync-status username type status someuser incremental Waiting for dsync to finish (the type is "incremental for most users, but "normal" and "full" show up as well) # doveadm replicator status someuser username priority fast sync full sync success sync failed someuser low 00:01:51 21:56:06 69:56:10 y (again, not all are in failed state) # top -abp 2090 PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 2090 sysdov 1 20 0 26M 15M kqread 12 0:01 0.00% doveadm-server: [<local>] (doveadm-server) (didn't change for >1d) # top -m io -abp 2090 PID USERNAME VCSW IVCSW READ WRITE FAULT TOTAL PERCENT COMMAND 2090 sysdov 363 58 0 271 2 273 0.00% doveadm-server: [<local>] (doveadm-server) (didn't change for >1d) # gdb -p 2090 ... (gdb stuff; gdb complaining about missing debug symbols) (gdb) bt full #0 0x00000000416a94ca in _kevent () from /lib/libc.so.7 No symbol table info available. #1 0x00000000419b94f3 in ?? () from /lib/libthr.so.3 No symbol table info available. #2 0x000000004152a645 in io_loop_handler_run_internal () from /usr/local/lib/dovecot/libdovecot.so.0 No symbol table info available. #3 0x00000000415282fa in io_loop_handler_run () from /usr/local/lib/dovecot/libdovecot.so.0 No symbol table info available. #4 0x0000000041528138 in io_loop_run () from /usr/local/lib/dovecot/libdovecot.so.0 No symbol table info available. #5 0x000000004148ac58 in master_service_run () from /usr/local/lib/dovecot/libdovecot.so.0 No symbol table info available. #6 0x0000000001086431 in main () No symbol table info available. (gdb) So I guess it's waiting for something that * doesn't happen on my system * or it didn't wait for in 2.3.16 >From what I've seen, mails from the active server (still on 2.3.16) are replicated to this server. For non-affected users, mails are also replicated from this server to the active one. I can't tell about "outgoing" replication for affected users, yet. After downgrading back to 2.3.16, things are fine again. Most affected users jump back to being successfully synced within a couple of minutes. If not, starting replication via doveadm get's them there. Testing 2.3.18 again, it seems that the same users are affected again. I also tested 2.3.17 when it came out and had the same issue, paired with the ioloop issue [1], which was fixed in 2.3.18 and which I don't see anymore. The hanging doveadm processes remain, though. Do you have any suggestions on how to resolve this? [1] https://dovecot.org/pipermail/dovecot/2022-January/123907.html Best regards Sebastian # doveconf -n # 2.3.18 (9dd8408c18): /usr/local/etc/dovecot/dovecot.conf # Pigeonhole version 0.5.18 (0bc28b32) # OS: FreeBSD 13.0-RELEASE-p6 amd64 # Hostname: myhost... auth_cache_ttl = 0 auth_username_chars = abcdefghijklmnopqrstuvwxyz01234567890@.- auth_username_format = %n default_client_limit = 126000 default_process_limit = 50000 default_vsz_limit = 512 M doveadm_password = # hidden, use -P to show it first_valid_gid = 20 first_valid_uid = 20 imap_client_workarounds = tb-extra-mailbox-sep imap_logout_format = in=%i out=%o delflag=%{deleted} deleted=%{expunged} trashed=%{trashed} session=<%{session}> login_trusted_networks = # imap proxy ips... mail_gid = sysdov mail_location = maildir:~/maildir:INDEX=/addons/index/%u:CONTROL=~/control:LAYOUT=fs mail_plugins = acl notify replication mail_uid = sysdov 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 editheader namespace fremdeordner { list = yes location = maildir:%%h/maildir:INDEX=/addons/index/%u/FremdeOrdner/%%u:LAYOUT=fs prefix = FremdeOrdner/%%u/ separator = / subscriptions = no type = shared } namespace inbox { inbox = yes list = yes location = mailbox Archive { auto = no special_use = \Archive } mailbox Archives { special_use = \Archive } mailbox AutoCleanSpam { auto = subscribe } mailbox "Deleted Items" { special_use = \Trash } mailbox "Deleted Messages" { special_use = \Trash } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Entwürfe { special_use = \Drafts } mailbox "Gelöschte Elemente" { special_use = \Trash } mailbox "Gesendete Elemente" { special_use = \Sent } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Items" { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } mailbox name { special_use = \Drafts \Junk \Sent \Trash \Archive } prefix = separator = / subscriptions = yes type = private } passdb { args = /usr/local/etc/dovecot/deny-users deny = yes driver = passwd-file } passdb { args = failure_show_msg=yes dovecot driver = pam } plugin { acl = vfile acl_shared_dict = file:/addons/acl/shared-folder mail_replica = tcp:myreplica...:12345 sieve = /addons/sieve/%u.sieve sieve_dir = sieve_extensions = +imap4flags +editheader sieve_vacation_dont_check_recipient = yes } protocols = imap lmtp replication_dsync_parameters = -d -n 'inbox' -l 30 -U replication_max_conns = 150 service aggregator { fifo_listener replication-notify-fifo { user = sysdov } unix_listener replication-notify { user = sysdov } } service anvil { client_limit = 60003 unix_listener anvil-auth-penalty { mode = 00 } unix_listener anvil { group = nagios mode = 0660 } } service auth { client_limit = 126000 unix_listener auth-userdb { mode = 0644 user = sysdov } } service config { unix_listener config { user = sysdov } } service doveadm { inet_listener { port = 12345 } user = sysdov vsz_limit = 1 G } service imap-login { client_limit = 20000 process_limit = 10000 process_min_avail = 138 service_count = 0 } service imap { process_limit = 80000 process_min_avail = 10 vsz_limit = 512 M } service lmtp { client_limit = 1 executable = lmtp -L process_min_avail = 20 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = sysdov } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0600 user = sysdov } } ssl_cert = </usr/local/etc/letsencrypt/live/myhost/fullchain.pem ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { default_fields = mail_replica=tcp:myreplica...:12345 driver = passwd override_fields = uid=29 gid=29 blocking=yes } verbose_proctitle = yes protocol imap { login_trusted_networks = # imap proxy ips... mail_max_userip_connections = 25 mail_plugins = acl notify replication acl imap_acl } protocol lmtp { mail_plugins = acl notify replication sieve postmaster_address = postmaster@... sendmail_path = /usr/local/sbin/sendmail }

1 0

Different handling of upper and lower case while indexing/searching with Solr
by Patrik Peng 10 Feb '22

10 Feb '22

Hello there We stumbled upon an user account with Solr FTS, which returned no search results for any given search query. Further investigation revealed an issue between indexing mails and querying the index. The user name contains upper and lower case characters (eg. Some.User(a)domain.net) When new mail is indexed for this user, the user name used for Solr's `user` and `id` fields are transformed into lowercase, as shown in the Solr log: webapp=/solr path=/update params={...}{add=[8543/426f3b0348d03451a3fb00008ba2b673/some.user(a)domain.net (1724281617442144256), ... (162 adds)]} 0 44298 And can be confirmed by manually querying Solr. The Solr schema in use performs no transformation for the affected fields. When a search request is performed via IMAP, Dovecot queries Solr with the original user name: GET /solr/dovecot_fts_popimap/select?wt=json&f...&fq=%2Bbox:1a30ec359dce3451b8e600008ba2b673+%2Buser:Some.User@domain.net HTTP/1.1" Which (correctly) returns zero results. To summarize, I suspect dovecot transforms any user name to lower case while indexing mails, but not when querying for results. Is this a bug, or caused by misconfiguration? Regards Patrik

3 9

Outlook 2019 and push notifications
by Laura Smith 10 Feb '22

10 Feb '22

Is there some secret config sauce I'm unaware of to get IMAP push notifications working with Outlook ? My present situation is that non-Outlook users (e.g. Apple iOS, Apple Mail etc.) work perfectly with the config below. New emails get pushed, deletes get reflected, all is happy in the world. But with Outlook nothing. You send a user an email, nothing happens in their inbox until you manually refresh by checking for new mails or waiting for the auto-check to kick in (sometimes switching between IMAP folders also does the trick). I know Outlook has a long history of being a mess when it comes to standards compliance, but surely it can't be this bad ? doveconf -n : # 2.3.18 (9dd8408c18): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.18 (0bc28b32) # OS: Linux 5.10.0-11-amd64 x86_64 Debian 11.2 xfs # Hostname: foobar.example.com auth_verbose = yes auth_verbose_passwords = sha1:7 doveadm_password = # hidden, use -P to show it imap_capability = +SPECIAL-USE imapc_features = rfc822.size fetch-headers fetch-bodystructure imapc_port = 993 imapc_ssl = imaps mail_location = maildir:/foo_data/mail/%d/%n/Maildir mail_plugins = notify replication push_notification 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 namespace inbox { inbox = yes location = mailbox "Deleted Messages" { auto = no special_use = \Trash } mailbox Drafts { special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/local_sql_users.conf driver = sql } plugin { imapsieve_mailbox1_before = file:/etc/dovecot/imap_sieve/spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Junk imapsieve_mailbox2_before = file:/etc/dovecot/imap_sieve/ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Junk imapsieve_mailbox2_name = * sieve = file:~/sieve;active=~/.dovecot.sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment sieve_pipe_bin_dir = /etc/dovecot/imap_sieve sieve_plugins = sieve_imapsieve sieve_extprograms } protocols = imap lmtp sieve service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } vsz_limit = 2 G } service doveadm { inet_listener { port = 11867 ssl = yes } } service imap-login { process_min_avail = 5 service_count = 1 } service lmtp { process_min_avail = 5 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } user = foo_virtmail } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieves { address = port = 5190 ssl = yes } } ssl = required ssl_ca = </etc/foobar/ssl/certificates/_.example.com.issuer.crt ssl_cert = </etc/foobar/ssl/certificates/_.example.com.crt 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_prefer_server_ciphers = yes userdb { args = /etc/dovecot/local_sql_users.conf default_fields = uid=foo_virtmail gid=foo_virtmail home=/foo_data/mail/%d/%n driver = sql } protocol lmtp { mail_plugins = notify replication push_notification sieve postmaster_address = foo(a)foobar.com } protocol lda { deliver_log_format = msgid=%m: %$ mail_plugins = notify replication push_notification sieve postmaster_address = postmaster quota_full_tempfail = yes rejection_reason = Your message to <%t> was automatically rejected:%n%r } protocol imap { mail_max_userip_connections = 20 mail_plugins = notify replication push_notification imap_sieve }

2 1

Certificate and showing a sign-cert not there
by Wayne Spivak 10 Feb '22

10 Feb '22

Hi - I am running Postfix 3.6.4 with Dovecot 2.3.17.1 (476cd46418). I have a multi-signed cert from Entrust. The cert works fine on port 25. However, on Port 587 I get an error: c [root@mcq wbs]# openssl s_client -connect mcq.sbanetweb.com:993 -servername mcq.sbanetweb.com CONNECTED(00000003) depth=0 C = US, ST = New York, L = Bellmore, O = SBA Consulting LTD, CN = mcq.sbanetweb.com verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 C = US, ST = New York, L = Bellmore, O = SBA Consulting LTD, CN = mcq.sbanetweb.com verify error:num=21:unable to verify the first certificate verify return:1 depth=0 C = US, ST = New York, L = Bellmore, O = SBA Consulting LTD, CN = mcq.sbanetweb.com verify return:1 --- Certificate chain 0 s:C = US, ST = New York, L = Bellmore, O = SBA Consulting LTD, CN = mcq.sbanetweb.com i:C = US, O = "Entrust, Inc.", OU = See www.entrust.net/legal-terms <http://www.entrust.net/legal-terms> , OU = "(c) 2012 Entrust, Inc. - for authorized use only", CN = Entrust Certification Authority - L1K [root@mcq wbs]# dovecot -n # 2.3.17.1 (476cd46418): /etc/dovecot/dovecot.conf # OS: Linux 5.16.5-200.fc35.x86_64 x86_64 Fedora release 35 (Thirty Five) # Hostname: mcq.sbanetweb.com auth_mechanisms = plain login disable_plaintext_auth = no mbox_write_locks = fcntl 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 { driver = pam } protocols = imap service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = postfix mode = 0666 user = postfix } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } service submission-login { inet_listener submission { port = 587 } } ssl = required ssl_cert = </etc/postfix/tls/ServerCertificate.pem ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-G CM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AE S128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA25 6:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE- ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES1 28-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE -DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES12 8-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNUL L:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-D ES-CBC3-SHA:!KRB5-DES-CBC3-SHA ssl_client_ca_dir = /etc/postfix/tls/ ssl_client_ca_file = ChainBundle.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { driver = passwd } protocol imap { mail_max_userip_connections = 15 } Any ideas? Wayne Spivak SBANETWEB.com

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Config for filtering (ignoring) specific mbox mail folders?
by John Hardin 08 Feb '22

08 Feb '22

Folks: I'm migrating to Dovecot to provide IMAP services for my personal network. I have more than a couple of decades of mail in multiple (1000+) mbox mail files, but I don't care to expose all of those to IMAP. Is there any way to filter out what mail folders Dovecot will LIST and provide access to using globs or regular expressions? I'd prefer to avoid rearranging the mbox files (e.g. to subdirectories) if possible. I looked through the Dovecot documentation and didn't see anything promising, and I couldn't find any discussion of the topic online. The feature that looked like it might be closest was Namespaces, but I couldn't see how to use that to ignore specific mbox files. Is there any facility within Dovecot (or a plugin) to filter out / ignore mail folders by name, RE or file glob? Thanks in advance! -- John Hardin KA7OHZ http://www.impsec.org/~jhardin/ jhardin(a)impsec.org pgpk -a jhardin(a)impsec.org key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79

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