February 2024 - dovecot

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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Bug report: invalid \HasNoChildren in response when asterisk is used in the name
by Merijn Schering 18 Apr '24

18 Apr '24

Hi, I'm using dovecot 2.3.4.1 (f79e8e7e4). I have created a folder called "Test with *". Now when I do a command: A3 LIST "" "%" RETURN (CHILDREN STATUS (MESSAGES UNSEEN)) It responds: * STATUS Test with * ( MESSAGES 0 UNSEEN 0 ) * LIST ( \HasNoChildren \UnMarked ) / Spam But it actually has children! This only happens when I use a * character in the name. I hope you can fix this some day. Thanks! Best regards, Merijn Schering Intermesh https://www.group-office.com https://twitter.com/GroupOffice

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doveadm sync - I/O has stalled
by songliny 09 Apr '24

09 Apr '24

Hi All, We are using dovecot 2.3.19.1 We created a account with more than 1000 mail folders in Maildir format to reproduce the issue. After weeks of testing, we have found a logic that may cause dsync to encounter the error - no activity for 900 seconds.... The function, dsync_ibc_stream_input, is the callback function after some data are ready for be read. This is part of what it does. o_stream_cork(ibc->output); ibc->ibc.io_callback(ibc->ibc.io_context); o_stream_uncork(ibc->output); Normally, ibc->ibc.io_callback(ibc->ibc.io_context) reads some data and then processes it. But when dsync connects over tcps, it uses function implementations in lib-ssl-iostream to send and receive data. And this simplified call stack would result in some data are read when calling o_stream_uncork o_stream_uncork => o_stream_flush => o_stream_ssl_flush_buffer => openssl_iostream_bio_sync => openssl_iostream_bio_input If some data arrive after ibc->ibc.io_callback(ibc->ibc.io_context) and before o_stre am_uncork, o_stream_uncork would read the data and then return. After o_stream_uncork returns, dsync then waits for new data to be read or written. But because the data had been read in o_stream_uncork, and there may be no new data to be read, dsync may then wait until timeout is met. It may happen, but it is hard to reproduce. If you also encounter this situation, you may try to use dsync over tcp connection. It does not read data when calling o_stream_uncork. As a result, it may not stuck. Back to the error itself, Maybe openssl-stream should not read data when doing uncork(flush)? Song-Lin Yang

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2.4 ballpark release date?
by Shawn Heisey 05 Apr '24

05 Apr '24

I'm wondering whether there is a ballpark release date for Dovecot 2.4. I know an exact release date is probably not available, but can it at least be narrowed to a specific quarter? Is it likely in 2023? I have seen on previous messages that an Ubuntu repository for 22.04 (jammy) will appear with the 2.4 release. My mail server in AWS is running Ubuntu 20.04 (focal), which I have avoided upgrading for various reasons, including websites that don't work with PHP 8.1. Now the last remaining hurdle is the fact that there is no dovecot repository for jammy. I would prefer the official Dovecot repo over dovecot packages included with Ubuntu, because it's likely to be a newer release, and built from vanilla project code. At the moment jammy includes dovecot 2.3.16, which is even older than the 2.3.20 that I am running on focal from the official dovecot repo. Again, I know that a precise release date won't be possible. I'm just hoping for something like "soon" or "in about six months." Thanks, Shawn

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replication timeout
by Andy Balholm 28 Mar '24

28 Mar '24

I have two Dovecot mail servers that replicate to each other. Sometimes there are delays in the synchronization, and I notice that the mail log has entries like this: Error: dsync(spokane): I/O has stalled, no activity for 600 seconds (last sent=mailbox, last recv=mailbox_state) Five minutes seems like a long time to sit there waiting with nothing happening. Is there a way to reduce this timeout so that I don't have so many replicaton connections just sitting around doing nothing? (Of course, a way to prevent the I/O stalls would be great too, but with my limited upload bandwidth, they may be unavoidable.) Andy

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virtual user list in a passwd file (without linux user)
by paul＠virtuadv.com 23 Mar '24

23 Mar '24

Hi, I am trying to have a virtual user list in a passwd file (without linux user) but it does not seem to work. I have been trying to make this work for days reading the dovecot documentation and whatever I could find online... Note that I did not enable imap since I only use pop3s to retrieve my emails. I also tried to follow this guide: https://doc.dovecot.org/configuration_manual/howto/simple_virtual_install/ Note that once this works for dovecot, I plan to have postfix use the dovecot auth service to authenticate the virtual users and validate mail boxes. # cat /proc/version Linux version 6.1.0-17-cloud-amd64 (debian-kernel(a)lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.69-1 (2023-12-30) # dovecot version Feb 15 15:57:26 master: Info: Dovecot v2.3.19.1 (9b53102964) starting up for pop3, submission, lmtp # doveconf -n # 2.3.19.1 (9b53102964): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.19 (4eae2f79) # OS: Linux 6.1.0-17-cloud-amd64 x86_64 Debian 12.5 # Hostname: 85e10e78339f auth_verbose = yes debug_log_path = /dev/stdout first_valid_uid = 1000 info_log_path = /dev/stdout last_valid_uid = 1000 listen = * log_path = /dev/stdout login_greeting = greeting. mail_debug = yes mail_gid = 1000 mail_home = /srv/vmail/%d/%n mail_location = maildir:~/mail mail_uid = 1000 namespace { inbox = yes location = prefix = separator = / } passdb { args = username_format=%u /path/to/passwd driver = passwd-file } pop3_uidl_format = %g protocols = pop3 submission lmtp service auth { inet_listener { address = <ip> port = 12345 } user = vmail } service lmtp { inet_listener lmtp { address = <ip> port = 12344 } user = vmail } service pop3-login { client_limit = 1000 process_min_avail = 1 service_count = 0 } service submission-login { client_limit = 1000 process_min_avail = 1 service_count = 0 } ssl_cert = <cert.pem ssl_key = # hidden, use -P to show it userdb { args = username_format=%u /path/to/passwd default_fields = uid=vmail gid=vmail home=/srv/vmail/%d/%n driver = passwd-file } verbose_proctitle = yes local_name site1.com { ssl_cert = </etc/apache2/md-ssl/domains/site1.com/pubcert.pem ssl_key = # hidden, use -P to show it } local_name www.site1.com { ssl_cert = </etc/apache2/md-ssl/domains/site1.com/pubcert.pem ssl_key = # hidden, use -P to show it } The passwd file: # user:password:uid:gid:(gecos):home:(shell):extra_fields user1(a)site1.com{PLAIN}password1:::::: user2(a)site2.com{PLAIN}password2:::::: This is the log I am getting when trying to create an account with Thunderbird: Feb 15 15:57:26 master: Info: Dovecot v2.3.19.1 (9b53102964) starting up for pop3, submission, lmtp Feb 15 17:34:45 pop3-login: Info: Disconnected: Aborted login by logging out (no auth attempts in 0 secs): user=<>, rip=<ip>, lip=<ip>, TLS, session=<cMIeC28RVOImVwz3> Feb 15 17:35:02 auth: Info: passwd-file(user1(a)site1.com,<ip>,<AIAjDG8RVuImVwz3>): unknown user Feb 15 17:35:08 auth: Info: passwd-file(user1(a)site1.com,<ip>,<AIAjDG8RVuImVwz3>): unknown user Feb 15 17:35:10 pop3-login: Info: Disconnected: Aborted login by logging out (auth failed, 2 attempts in 8 secs): user=<user1(a)site1.com>, method=PLAIN, rip=<ip>, lip=<ip>, TLS, session=<AIAjDG8RVuImVwz3> I tried using doveadm: # doveadm user user1 userdb lookup: user user1 doesn't exist field value # doveadm user user1(a)site1.com userdb lookup: user user1(a)site1.com doesn't exist field value I also tried with the verbose on (removed all the 'usually intentional'): # doveadm -Dv user user1(a)site1.com Feb 15 17:38:17 doveadm(user1(a)site1.com)<137><>: Debug: auth-master: userdb lookup(user1(a)site1.com): Started userdb lookup Feb 15 17:38:17 doveadm(user1(a)site1.com)<137><>: Debug: auth-master: conn unix:/run/dovecot/auth-userdb: Connecting Feb 15 17:38:17 doveadm(user1(a)site1.com)<137><>: Debug: auth-master: conn unix:/run/dovecot/auth-userdb (pid=7,uid=0): Client connected (fd=9) Feb 15 17:38:17 doveadm(user1(a)site1.com)<137><>: Debug: auth-master: userdb lookup(user1(a)site1.com): auth USER input: Feb 15 17:38:17 doveadm(user1(a)site1.com)<137><>: Debug: auth-master: userdb lookup(user1(a)site1.com): Userdb lookup failed userdb lookup: user user1(a)site1.com doesn't exist Feb 15 17:38:17 Debug: auth-master: conn unix:/run/dovecot/auth-userdb (pid=7,uid=0): Disconnected: Connection closed (fd=9) field value I could not find a way to list either the mailboxes or virtual user list that dovecot is using/serving.

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Fw: User-configurable time-based mail deletion in specific folders
by Rupert Gallagher 10 Mar '24

10 Mar '24

> Things like this should be done locally on the Mailclient (MUA), IMHO. If you are a company, then you must delete old e-mails automatically, by GDPR law. -------- Original Message -------- On Feb 21, 2024, 23:25, Steven Varco < dovecot.org(a)bbs.varco.ch> wrote: > Am 21.02.2024 um 21:25 schrieb Peter Reinhold : > > Hi > I have been wondering about if Dovecot has a feature that would allow users to > setup a rule for a given folder, that mails older than X days should be > deleted? > Or is > this something that would need to be done by an external script? Yes. It goes beyond of what I expect from an IMAP server. > I have looked a bit at autoexpunge, and while the basic feature looks to be > what I need, it doesn't seem to be configurable down to a specific folder on a > single user. Things like this should be done locally on the Mailclient (MUA), IMHO. Steven -- https://steven.varco.ch/ https://www.tech-island.com/ _______________________________________________ dovecot mailing list -- dovecot(a)dovecot.org To unsubscribe send an email to dovecot-leave(a)dovecot.org > Things like this should be done locally on the Mailclient (MUA), IMHO. If you are a company, then you must delete old e-mails automatically, by GDPR law. -------- Original Message -------- On Feb 21, 2024, 23:25, Steven Varco < dovecot.org(a)bbs.varco.ch> wrote: > Am 21.02.2024 um 21:25 schrieb Peter Reinhold : > > Hi > I have been wondering about if Dovecot has a feature that would allow users to > setup a rule for a given folder, that mails older than X days should be > deleted? > Or is > this something that would need to be done by an external script? Yes. It goes beyond of what I expect from an IMAP server. > I have looked a bit at autoexpunge, and while the basic feature looks to be > what I need, it doesn't seem to be configurable down to a specific folder on a > single user. Things like this should be done locally on the Mailclient (MUA), IMHO. Steven - - https://steven.varco.ch/ https://www.tech-island.com/ _______________________________________________ dovecot mailing list - - dovecot(a)dovecot.org To unsubscribe send an email to dovecot-leave(a)dovecot.org

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JMAP status?
by Brad Koehn 09 Mar '24

09 Mar '24

Just wondering how/if JMAP support is coming along. It seems to offer major protocol advantages to a connection-oriented protocol like IMAP; I’m curious to see how it performs in the real world. Just wondering how/if JMAP support is coming along. It seems to offer major protocol advantages to a connection-oriented protocol like IMAP; I’m curious to see how it performs in the real world.

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Bug/Warning not sure which
by Richard Shetron 04 Mar '24

04 Mar '24

Hello, My sysadmin and I spent a couple hours trying to figure out a POP3 problem that has worked for about 20 or so years. We run our own dns for sgeinc.com. I've always used mail.sgeinc.com as my incoming and outgoing server. At various times mail has been an alias for another machine. It's currently on the same address as sge.sgeinc.com. On the update forced on us on 2/22/24 or 2/23/24 it stopped working. It still works as an outgoing server but incoming POP3 it stopped working. It started working when I changed my incoming server to sge.sgeinc.com. You might want to look into it or not. We chased the initial problem to, we think, ssh-keygen in /usr/local/bin/ which was Not found but is there. Thanks root@sge:/usr/local/bin# dovecot -n # 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.7.2 () # OS: Linux 5.4.0-172-generic x86_64 Ubuntu 20.04.6 LTS # Hostname: sge.sgeinc.com auth_mechanisms = plain login mail_location = maildir:~/Maildir 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 lmtp pop3" service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = postfix mode = 0660 user = postfix } } service pop3-login { inet_listener pop3 { port = 110 } } ssl = required ssl_cert = </etc/letsencrypt/live/sgeinc.com/fullchain.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { driver = passwd }

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better delivery mechanism to maildir?
by dovecot.org＠schildbach.de 03 Mar '24

03 Mar '24

As many of you probably are, I'm using Postfix together with Dovecot. Postfix delivers mail for my users by writing them directly to the filesystem (maildir). I wonder is there a better alternative? I'd like to separate the two services on different physical machines, so a shared filesystem isn't trivial any more. (I'd also like to stay with maildir storage and rather not do SQL or similar.) Can mail be delivered via IMAP for example? Or is there some other delivery protocol I don't know about that both Dovecot and Postfix support? Thanks!

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