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Debian, Postfix, Dovecot, MySQL, and argon2 password hashing scheme?
by David Mehler 25 Apr '24

25 Apr '24

Hello, I have a quick question. Can Debian, and/or it's Postfix/Dovecot/MySQL/MariaDB packages support the argon2 password hashing scheme? I had a previously-working e-mail setup on a *BSD system, utilizing the argon2ID scheme with Dovecot, Postfix, and MySQL. Since changing systems to Debian 12.5 I can't send, though checking the password with a manual login to Dovecot works fine. I'm wondering if I have to migrate the passwords from argon2ID to SHA512-CRYPT? Thanks. Dave. -- Sent from Mozilla Thunderbird 91.13.1

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RE: Which DKIM application for postfix 3.9.0
by Joseph Tam 24 Apr '24

24 Apr '24

On Tue, Apr 23, 2024 at 7:33 AM <dovecot-request(a)dovecot.org> wrote: > > I am upgrading to postfix 3.9.0. I have not used DKIM in previous postfix installs, but I >> would like to start now with the new google rules. I have done some research and opendkim >> is the most recommended, however, other research states the opendkim has been >> abandoned by it's maintainers. So I am looking for a good alternative dkim software >> that will work with postfix that I can compile myself. I do not run on any linux >> version, so therefore I can not just apt-get a new dkim application. >> I run Solaris and therefore need to compile my applications, postfix and dkim. >> Any good suggestions will be appreciated. I just rolled out a locally compiled opendkim on my mail server. It works, but there are a few gotchas. Although it seems like a moribund project, there is a late beta version that includes some important patches, most notably the "Header:\n LongHeaderValue" bug that needs fixing. You can look at https://sourceforge.net/p/opendkim/patches/ to find that patch, as well as others you deem important. As DKIM standards are not going to change soon, having end-of-line software is not as bad as it seems unless you need particular enhancements to make it work better in your circumstances. Once you get your setup dialed, you can probably set it and forget it. Most of the headaches have actually been internal: local mail injection via sendmail would skip miltering, From header canonicalization by the MTA would not be seen by the opendkim milter thereby creating messages with missing or invalid signatures, and mailing list/auto reply/forwarder software mangling messages. I think Postfix does a better job in this regard, so these issues may not present itself. (I did a Postfix/opendkim milter on an Ubuntu system and it was much less hassle.) You should look at *lots* of DMARC RUA reports. People are doing crazy batsh*t stuff with your mail domain. Joseph Tam <jtam.home(a)gmail.com>

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Setting compression to specific namespace
by Filip Bartmann 23 Apr '24

23 Apr '24

Hello, is it possible to set compression for specific namespace or spefic mailbox folder? Thanks, Filip Bartmann

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Question about line length limit in lmtp.
by Kamil Jońca 22 Apr '24

22 Apr '24

I have postfix + dovecot server. Mail for local users are saved by dovecot lmtp. Recently I got some messages from postfix: --8<---------------cut here---------------start------------->8--- 4NQ07L4h4LztXXr: breaking line > 998 bytes with <CR><LF>SPAC --8<---------------cut here---------------end--------------->8--- This is because postfix has configured with default value lmtp_line_length_limit (990). I can turn off this limit (set to 0) but I am curious if dovecot lmtp will accept so lengthty lines? Does dovecot lmtp has any line limits? KJ -- http://stopstopnop.pl/stop_stopnop.pl_o_nas.html

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doveadm index to terminate non-zero in case of failure
by Jaco Kroon 22 Apr '24

22 Apr '24

Hi, It would be great if doveadm index could terminate non-zero in the case of index corruption, that way the tool can be used as a way to determine and remove corrupted indexes. Example: othala [13:56:24] ~ # doveadm index -u lumi_james INBOX doveadm(lumi_james): Error: Corrupted transaction log file /path/to/lumi_james/dovecot.list.index.log seq 2: Unexpected garbage at EOF (sync_offset=7168) doveadm(lumi_james): Error: Failed to map transaction log /path/to/lumi_james/dovecot.list.index.log at sync_offset=7168 after locking: Unexpected garbage at EOF othala [13:56:34] ~ # echo $? 0 othala [13:56:37] ~ # If doveadm index exited non-zero in above case we'd be able to: if ! doveadm index -u lumi_james INBOX; then rm /path/to/lumi_james/dovecot.index{,log,.cache} fi Which may be over-zealous in removing indexes, but we'd rather have that. We believe we already fixed the locking issue that caused the corrupt indexes and are busy cleaning them up based on log files, but it would still be great if the above could be integrated into our check battery if/when users report problems, of "run the script and it fixes 99% of things that are known to break". In the same breath, we're seeing that folders with & in the name are causing problems for doveadm index -u someuser '*' usage. Kind regards, Jaco

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Variable expansion on %w
by Gandalf Corvotempesta 21 Apr '24

21 Apr '24

I'm following the guide for changing the password schema. Everything works as expected (i'm using a static passwd file), but when the plain password has a % inside, dovecot is trying to expand that, triggering an error: Apr 11 21:33:55 mail02 dovecot: pop3(x)<3962994><4soGPNcVXsoln9W6>: Error: Failed to expand plugin setting plain_pass = 'xxxxx%Yxxxxxx!%': Unknown variable '%Y' How can I block the variable expansion inside %w ?

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Sieve not getting recompiled
by Joan Moreau 21 Apr '24

21 Apr '24

Hi I have sieve = /mails/%d/%n/sieve/roundcube.sieve sieve_after = /mails/sieve/after.sieve sieve_before = /mails/sieve/before.sieve sieve_dir = /mails/%d/%n/sieve/ sieve_global_dir = /mails/sieve/ But sieve scripts are not compiled and not executed It was working until I removed the setting "sieve_global_path" Something I dont understand ? Thank you

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exfat not supported ?
by Joan Moreau 21 Apr '24

21 Apr '24

Hi Would placing my storage on a exfat partition work ? If no, why ? Thank you

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Logging e_debug messages
by D S 21 Apr '24

21 Apr '24

Is it possible to log the e_debug events in quota-status.c? [https://github.com/dovecot/core/blob/main/src/plugins/quota/quota-status.c] Running: Dovecot 2.3.19.1 (9b53102964) Here's the config I've tried: log_path = /var/log/dovecot.log event_exporter log { format = json format_args = time-rfc3339 transport = log } metric everything { exporter = log filter = event=* OR category=* } log_debug = event=* auth_verbose = yes auth_debug = yes mail_debug = yes This seems to capture events at INFO level or higher, and some Debug log messages, but not the e_debug messages in quota-status.c. Thanks, Daniel

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thread->detach() creates confusion of dovecot
by Joan Moreau 20 Apr '24

20 Apr '24

Hi When I try to "detach" (https://en.cppreference.com/w/cpp/thread/thread/detach) a thread running inside a plugin, it seems the core dovecot has some influence on that , tries to close this for some unknown reason and usually ends up crashing What is the cause of this ? Thank you

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