November 2020 - dovecot

vsz_limit
by Joan Moreau 04 Nov '20

04 Nov '20

Hello I am looking for help around memory management 1 - How to get the current value of "vsz_limit" from inside a plugin (namely https://github.com/grosjo/fts-xapian/ ) , especially for indexer-worker 2 - Is there a macro or function in dovecot to get the remaining free memory from this vsz value ? Thank you

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Feature Request: Redis support for username and TLS
by Mark Moseley 04 Nov '20

04 Nov '20

I was wondering if there was any imminent support in 2.3.12+ for using a username to log into Redis, as well as support for using TLS to connect to Redis. And if not, I'd like to put in a feature request for those two things (AUTH with username/password, and TLS connections to Redis). Specifically, I was looking at using a username/password combo to log into Redis for the quota_clone plugin. I found the 'password' param in the source (not documented at https://wiki.dovecot.org/Dictionary) There's no 'username' param (the 'username' in the source seems to refer to the mailbox, for the purpose of building the key name). Redis 6 supports authenticating with a username and password, as well as the ability to listen on a TLS-enabled port. Both of these significantly improve security, combined with the new ACL system. Obviously, these Redis 6 features are brand new, so I'd be shocked if they were already supported. But it'd be awesome if those were added to Dovecot :) Currently, I've got a localhost Envoy proxy doing TCP proxying from localhost+non-TLS to my Redis TLS port, which is a kludge at best. There's a neat Envoy Redis proxy that *almost* does the trick but the Envoy Redis proxy unfortunately doesn't support MULTI/EXEC, which Dovecot quota_clone uses, or I'd be using that instead of a plain TCP proxy (since the Envoy Redis proxy can use a username/password+tls to connect to the upstream Redis).

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Delivering locally through the Submission Server
by R. Diez 03 Nov '20

03 Nov '20

Hi all: I am learning Dovecot step by step. I have enabled the Submission Server, in the hope that I would not need to learn other MTAs like Postfix. The Submission Server is very comfortable: it picks up the existing Dovecot configuration, so that you do not need to configure any user authentication separately. It is working fine on my test setup. My first thought was that, if the recipient is a local mailbox, the Submission Server would not need to relay the message to any external SMTP server, as it could just deliver it locally. After all, it is running on the same Dovecot. But it cannot do that, can it? Is there a work-around? I am still hoping that the mail server still works locally if the Internet connection fails. But I would need to learn some Postfix magic for that, would I? Thanks in advance, rdiez

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Re: Delivering locally through the Submission Server
by Aki Tuomi 03 Nov '20

03 Nov '20

> On 03/11/2020 12:31 Piotr Auksztulewicz <dcml(a)hasiok.net> wrote: > > > On Mon, Nov 02, 2020 at 09:33:08PM +0100, R. Diez wrote: > > OK, so I gather that the Submission Server cannot do that (yet). > > And probably would never do. It isn't its job description. > > Actually, it is just a convenience/workaround feature, which comes handy > only if your own MTA cannot handle dovecot's SASL authentication (must be > something real strange) or there are some integration/security/policy > issue perceived (but I cannot think of any, actually). In this case you > can set up dovecot's submission server, which uses dovecot's authentication > settings, so you have single source of authentication, and whitelist > dovecot IP address in your MTA so it accepts anything that dovecot's > submission server lets through. But I don't think it is a good idea > personally, it is more open to exploitation this way, unless the > address is 127.0.0.1, in which case you can simply set up SASL over > Unix sockets, which is as secure as your host server is. > Submission service is not only a proxy, it - provides authentication natively from Dovecot - provides features like BURL, and maybe in future outbound Sieve but it does require real MTA behind. -- Aki

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API support for placing a message for a specific user
by Oren Yehezkely 03 Nov '20

03 Nov '20

Hello, I am trying to find out if Dovecot API allows placing a message directly in a customer's mailbox, without needing to send the email via SMTP. Thanks for your help, Oren

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Re: strange file .temp.1592374672.P11164Q21M692534.hostname - doveadm altmove
by Aki Tuomi 02 Nov '20

02 Nov '20

> On 01/11/2020 21:13 John Stoffel <john(a)stoffel.org> wrote: > > > >>>>> "Gionatan" == Gionatan Danti <g.danti(a)assyoma.it> writes: > > Gionatan> Il 2020-11-01 13:23 John Stoffel ha scritto: > >> How is your "mail_location" defined in your configuration? And what > >> is your search term? > > Gionatan> Hi, I just discovered having such strange .temp files on an > Gionatan> old server of mine. > > I honestly haven't a clue... I don't have these on my server at all. > > Gionatan> In some folders I have hundred of such files, but they > Gionatan> really are hardlinks to the same .temp file (for each > Gionatan> folder), so they do not consume much space. These files > Gionatan> seems much more common in the Trash folder, but they appear > Gionatan> even in other folder. > > I would probably just nuke these files, but maybe after confirming > what their contents really is. > > Gionatan> An example of a folder with 6 .temp files: > Gionatan> [root@mail dbox-Mails]# ls -al > Gionatan> /var/vmail/domain/user/dbox/mailboxes/INBOX/Trash/dbox-Mails > Gionatan> drwxr-x---. 2 vmail vmail 4096 Oct 31 12:42 . > Gionatan> drwxr-x---. 3 vmail vmail 4096 Mar 17 2020 .. > Gionatan> -rw-r-----. 1 vmail vmail 512 Oct 29 09:45 dovecot.index > Gionatan> -rw-r-----. 1 vmail vmail 392 Oct 28 13:59 dovecot.index.backup > Gionatan> -rw-r-----. 1 vmail vmail 55296 Oct 31 12:42 dovecot.index.cache > Gionatan> -rw-r-----. 1 vmail vmail 23536 Oct 31 12:42 dovecot.index.log > Gionatan> -rw-r-----. 6 vmail vmail 22215889 Oct 12 10:42 > Gionatan> .temp.1602492703.P47358Q0M194142.hostname > Gionatan> -rw-r-----. 6 vmail vmail 22215889 Oct 12 10:42 > Gionatan> .temp.1602494002.P50402Q0M898232.hostname > Gionatan> -rw-r-----. 6 vmail vmail 22215889 Oct 12 10:42 > Gionatan> .temp.1602494013.P50446Q0M771524.hostname > Gionatan> -rw-r-----. 6 vmail vmail 22215889 Oct 12 10:42 > Gionatan> .temp.1602494621.P51761Q0M119496.hostname > Gionatan> -rw-r-----. 6 vmail vmail 22215889 Oct 12 10:42 > Gionatan> .temp.1602494745.P51954Q0M387071.hostname > Gionatan> -rw-r-----. 6 vmail vmail 22215889 Oct 12 10:42 > Gionatan> .temp.1602495419.P53185Q0M671512.hostname > Gionatan> -rw-r-----. 1 vmail vmail 848909 Oct 29 21:12 u.1623 > > Gionatan> 6x 22M files = 128M... > Gionatan> [root@mail dbox-Mails]# du -hscl .temp.160249* > Gionatan> 22M .temp.1602492703.P47358Q0M194142.hostname > Gionatan> 22M .temp.1602494002.P50402Q0M898232.hostname > Gionatan> 22M .temp.1602494013.P50446Q0M771524.hostname > Gionatan> 22M .temp.1602494621.P51761Q0M119496.hostname > Gionatan> 22M .temp.1602494745.P51954Q0M387071.hostname > Gionatan> 22M .temp.1602495419.P53185Q0M671512.hostname > Gionatan> 128M total > > Gionatan> ...but only 22M really consumed (1 file, 6 hardlinks) > Gionatan> [root@mail dbox-Mails]# du -hsc .temp.160249* > Gionatan> 22M .temp.1602492703.P47358Q0M194142.hostname > Gionatan> 22M total > > Gionatan> I never run doveadm altmove; moreover, these .tempo files > Gionatan> are both old (>1 year) and new (~3 weeks ago). Below you can > Gionatan> find the output from dovecot -n. Any ideas? > > I really don't know, sorry! I'd have to got poke at the source to see > how they're created and where. I don't use dbox, I use Maildir for my > setup. > > So I suspect (but I'm not sure!) that these are just leftovers from > mailbox accesses which got left behind. Try googling for 'dovecot > dbox temp files' and maybe that will help. Sorry! > > John Those files are most likely leftovers due to failed operations, for reasons like crashes. Aki

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v2.3.11.3 solr plugin search via MUA fails to match accented ascii characters; cmd line exec of `doveadm fts lookup` PANICs (assertion failed)
by PGNet Dev 02 Nov '20

02 Nov '20

I'm running, dovecot --version 2.3.11.3 (502c39af9) solr -version 8.6.3 uname -rm 5.8.13-200.fc32.x86_64 x86_64 grep _NAME /etc/os-release PRETTY_NAME="Fedora 32 (Server Edition)" CPE_NAME="cpe:/o:fedoraproject:fedora:32" Solr FTS plugin is enabled/configured, mail_plugins = virtual acl fts fts_solr plugin { fts = solr fts_autoindex = yes fts_solr = url=https://solr.example.com:8984/solr/dovecot/ fts_enforced = body fts_filters = normalizer-icu stopwords snowball fts_language_config = /usr/share/libexttextcat/fpdb.conf fts_languages = en es de fr it pt soft_commit = yes } IMAP capability returns, a OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY STATUS=SIZE SAVEDATE SPECIAL-USE LITERAL+ NOTIFY SPECIAL-USE QUOTA ACL RIGHTS=texk] Logged in I've got two messages in my IMAP store, cd /data/vmail/example.com/myuser/Maildir/cur/ ls -altr | grep S= | /bin/tail -n2 -rw------- 1 vmail vmail 1.3K Oct 11 14:05 1602450306.M393628P65260.mx.example.com,S=1278,W=1304:2,S -rw------- 1 vmail vmail 1.3K Oct 11 14:05 1602450353.M756184P65260.mx.example.com,S=1277,W=1303:2,S that differ in BODY CONTENT -- -- one message has ascii txt with NO character accents -- the other has the same text, but with ON character accent cat "1602450306.M393628P65260.mx.example.com,S=1278,W=1304:2,S" ... From: M User <myuser(a)example.com> Subject: test Reply-To: myuser(a)example.com To: "User, My" <myuser(a)example.com> Message-ID: <6fc7ac30-b460-7dd4-f85d-ca4403ad7188(a)example.com> Date: Sun, 11 Oct 2020 14:05:06 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.3.2 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit !!!! también cat 1602450353.M756184P65260.mx.example.com,S=1277,W=1303:2,S ... From: M User <myuser(a)example.com> Subject: test Reply-To: myuser(a)example.com To: "User, My" <myuser(a)example.com> Message-ID: <015b3fb4-46f9-87cc-d541-060db0a13086(a)example.com> Date: Sun, 11 Oct 2020 14:05:53 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.3.2 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit !!!! tambien i manually re-scan & index doveadm fts rescan -u myuser(a)example.com doveadm index -u myuser(a)example.com -q '*' ... ==> /var/log/dovecot/dovecot-info.log <== 2020-10-11 15:06:34 indexer-worker(myuser(a)example.com)<OyUmLeqBg18fDAEA+IOfAw>: Info: Indexed 21 messages in accts (UIDs 14399..130699) 2020-10-11 15:06:34 indexer-worker(myuser(a)example.com)<6NnOMuqBg18fDAEA+IOfAw>: Info: Indexed 16 messages in accts/v007132 (UIDs 13414..14778) ... with no errors. then search in mail client, here TBird 78, with [X] Run Search on Server for _un_accented "tambien", match is correctly -- and quickly -- returned. in logs, ==> /var/log/dovecot/dovecot-info.log <== 2020-10-11 14:57:05 imap-login: Info: Login: user=<myuser(a)example.com>, method=PLAIN, rip=10.0.1.7, lip=10.0.1.50, mpid=67743, TLS 2020-10-11 14:57:16 indexer-worker(myuser(a)example.com)<3ZUzQ2yx2JKsHgsH:9gu0MbF/g1+hCAEA+IOfAw>: Info: Indexed 4788 messages in INBOX (UIDs 135476..140263) BUT, repeating search for ACCENTED "también" returns *no* match/result. No errors in log, simply no match. Attempting to test/debug from from cmd line, doveadm fts lookup -u myuser(a)example.com body "tambien" causes a PANIC doveadm(myuser(a)example.com): Panic: file mail-storage.c: line 2112 (mailbox_get_open_status): assertion failed: (box->opened) doveadm(myuser(a)example.com): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x46) [0x7f3ee94accc6] -> /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x22) [0x7f3ee94acde2] -> /usr/lib64/dovecot/libdovecot.so.0(+0x10025b) [0x7f3ee94b625b] -> /usr/lib64/dovecot/libdovecot.so.0(+0x100297) [0x7f3ee94b6297] -> /usr/lib64/dovecot/libdovecot.so.0(+0x59bc6) [0x7f3ee940fbc6] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x4779e) [0x7f3ee95c379e] -> /usr/lib64/dovecot/lib21_fts_solr_plugin.so(+0x5849) [0x7f3ee9015849] -> /usr/lib64/dovecot/lib20_fts_plugin.so(fts_backend_lookup+0x51) [0x7f3ee8c37491] -> /usr/lib64/dovecot/doveadm/lib20_doveadm_fts_plugin.so(+0x3280) [0x7f3ee8ba9280] -> doveadm(+0x343cd) [0x5637e99443cd] -> doveadm(+0x34fe0) [0x5637e9944fe0] -> doveadm(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x22d) [0x5637e9945e2d] -> doveadm(doveadm_cmd_run_ver2+0x4e8) [0x5637e99568d8] -> doveadm(doveadm_cmd_try_run_ver2+0x3e) [0x5637e995692e] -> doveadm(main+0x1d4) [0x5637e9934cf4] -> /lib64/libc.so.6(__libc_start_main+0xf2) [0x7f3ee9071042] -> doveadm(_start+0x2e) [0x5637e99351ce] Aborted (1) What config -- dovecot &/or solr -- is needed to match on accented characters? (2) What add'l detail, if any, is needed for troubleshooting the panic?

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removing 'use_libfts' from dovecot fts_solr config; docs/examples of solr-backend-only tokenizer config for dovecot?
by PGNet Dev 02 Nov '20

02 Nov '20

given existing problems with fts_solr = ... use_libfts ... i've rm'd it from dovecot config, and am moving all tokenization to solr config. iiuc, in dovecot + solr context, that's correctly config'd in solr/data/dovecot/conf/schema.xml dovecot release ships with 'starter configs', cp -af /usr/share/doc/dovecot/solr-config-7.7.0.xml /path/to/solr/data/dovecot/conf/solrconfig.xml cp -af /usr/share/doc/dovecot/solr-schema-7.7.0.xml /path/to/solr/data/dovecot/conf/schema.xml that^ schema.xml contains a limited solr.StandardTokenizerFactory config. it can of course be extended; lots of generic solr config info available. is there _documentation_, preferably a good example, of a dovecot-'friendly' solr config for non-"use_libfts" use case? specifically, moving any/all of the libfts front-end tokenizers @ https://doc.dovecot.org/configuration_manual/fts/tokenization/#fts-tokeniza… https://doc.dovecot.org/settings/plugin/fts-plugin/#plugin-fts-setting-fts-… fully to a backend solr instance? i suspect that solr config is fairly well insulated from dovecot's; what i'm not sure of is if dovecot's fts has specific requirements to get the backend-only tokenization working.

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Re: v2.3.11.3 solr plugin search via MUA fails to match accented ascii characters; cmd line exec of `doveadm fts lookup` PANICs (assertion failed) [proposed patch]
by Aki Tuomi 02 Nov '20

02 Nov '20

> On 02/11/2020 15:11 PGNet Dev <pgnet.dev(a)gmail.com> wrote: > > > On 11/2/20 12:44 AM, Aki Tuomi wrote: > > you should try removing use_libfts from your config line and let solr do that part. > > sry, i'm a bit confused. > > you'd suggested I _add_ it, > > https://dovecot.org/pipermail/dovecot/2020-October/120258.html > > > I can reproduce your problem with the `fts lookup` command. Luckily it's equivalent to running `doveadm search`. I'll open a bug about this. > > Dovecot FTS tokenization is not done, unless you have `use_libfts` in fts_solr setting, in your case > > fts_solr = url=https://solr.example.com:8984/solr/dovecot/ use_libfts > > Without this, everything is sent to to solr as-is, which is then expected to do all the work. > > So what's the recommendation? use use_libfts, or not? It's a choice. You can let solr perform the tokenization etc. or you can let dovecot do it. There is no recommendation when using solr. It seems that use_libfts is broken with solr due to reasons, so I guess the only option for now is not to use it. Aki

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Re: v2.3.11.3 solr plugin search via MUA fails to match accented ascii characters; cmd line exec of `doveadm fts lookup` PANICs (assertion failed) [proposed patch]
by Aki Tuomi 02 Nov '20

02 Nov '20

> On 01/11/2020 20:35 John Fawcett <john(a)voipsupport.it> wrote: > > > On 01/11/2020 15:20, PGNet Dev wrote: > > On 11/1/20 1:56 AM, John Fawcett wrote: > >> At the moment I don't see other corrections needed in dovecot apart from > >> command line doveadm fts which is not a show stopper. Via doveadm search > >> I confirm - on my simple config - that search for accented or non > >> accented characters works correctly as it does via imap connection. > > > > thx. hopefully it'll get considered for a next release soon. > > > >> Only thing I cannot vouch for is bringing dovecot fts library and config > >> into the equation because my setup delegates almost everything to solr. > > > > do i understand correctly that you're solr-indexing your dovecot mail > > store withOUT using dovecot fts plugin, and that -- with your > > aforementioned patch -- doveadm successfully uses the resulting indexes? > > > > i hadn't yet seriously considered _circumventing_ fts plugin; if this^ > > does get resolved soonish, then it's not a big deal. if not, an > > fts-plugin-less setup would be interesting to know more abt! > > > >> Can you get evidence of things not working? For example tests run with > >> soft_commit configured - that's important since without it the updates > >> don't show up immediately in searches, that do show that the update is > >> happening in solr via solr log, but then search is not working on > >> accented characters, despite it working on other text in the same > >> message? The solr logs also show whether the text was found or not via > >> the "hits=" value in the logged searches, for example: > >> > >> 2020-11-01 08:32:42.231 INFO (qtp24119573-21) [ x:dovecot] > >> o.a.s.c.S.Request [dovecot] webapp=/solr path=/select > >> params={q={!lucene+q.op%3DAND}body:también&fl=uid,score&sort=uid+asc&fq=%2Bbox:b1626f0fe8d9145e54100000c54a863a+%2Buser:john@voipsupport.it&rows=3202&wt=xml} > >> > >> hits=3 status=0 QTime=3 > >> > >> But if no hits are found, then dovecot cannot be expected to display > >> results. It still may be an indexing problem though. > > > > my current config has soft_commit enabled, > > > > fts_solr = url=https://solr.example.com:8984/solr/dovecot/ > > use_libfts soft_commit=yes batch_size=250 > > > > i'll see abt getting some clearer test results ... > > Yes, getting more data about any potential problem would be useful. > > Just to clarify: I have a fully working search setup for some time now > over various dovecot releases, so no patches needed to get it working. > > My setup does use fts plugin and fts-solr plugin, but it does not use > lib-fts functionality (that has many features for example it was > stopping you indexing excluded words like tambien). On my setup without > lib-fts everything goes to solr which does the work of indexing without > all the features of lib-fts. > > My setup is like this not because of issues in lib-fts, but because I > never had the need for it. There is no evidence at the moment however > that even with lib-fts enabled there are issues with dovecot indexing or > searching. > > What is currently nor working is "doveadm fts" command line utility. But > this is mitigated by being able to use a similar command line utility > "doveadm search". The issue on "dovecot fts" command line utility has > (so far as the available evidence suggests) no effect on indexing or > imap searches. > > fyi my working configuration includes fts and fts_solr plugins > > mail_plugins = quota notify replication fts fts_solr > > (and those are also recalled in the various specific plugin settings for > imap, lmtp ecc), The specific config I am using for fts and fts_solr is: > > fts = solr > fts_enforced = yes > fts_solr = url=https://user@server.example.com:443/solr/dovecot/ > batch_size=500 soft_commit=no > > BTW I use soft_commit=no because I have periodic soft commits setup on > solr and I accept that newly indexed text won't become searchable for up > to that interval, but for your testing purposes much more useful as you > have it. > > John PGNet, you should try removing use_libfts from your config line and let solr do that part. Aki

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