dovecot - Feb 2020 - maildirfolder file created in maildir root during auto-creation with 2.3.4.1 but not 2.2.27

Hello,

as the tin says.
I have several servers running 2.2.27 (Debian stretch) and am adding new
ones with 2.3.4.1 (Debian buster).
The configs were upgraded where needed but neither 10-mail.conf nor
15-mailboxes.conf were changed. 
15-mailboxes is all commented out (I guess the default is auto-create,
which isn't documented anywhere I could find) and the only non-comments in
10-mail.conf are
---
mail_location = maildir:%h
mail_privileged_group = mail
---

So yes, no namespaces are explicitly defined/declared.


The 2.3.4.1 version wrongly creates a maildirfolder file in the home
directory (maildir root), preventing exim from correctly creating/using
maildirsize.

a) Is this expected behavior and can it be changed?
b) How can I disable inbox auto-creation if a) doesn't pan out?

Thanks,

Christian
-- 
Christian Balzer        Network/Systems Engineer                
chibi at gol.com   	Rakuten Mobile Inc.

Can you provide full doveconf -n output? Also how are you delivering mail?

Aki

On 5.2.2020 4.24, Christian Balzer wrote:
>
> Hello,
>
> as the tin says.
> I have several servers running 2.2.27 (Debian stretch) and am adding new
> ones with 2.3.4.1 (Debian buster).
> The configs were upgraded where needed but neither 10-mail.conf nor
> 15-mailboxes.conf were changed. 
> 15-mailboxes is all commented out (I guess the default is auto-create,
> which isn't documented anywhere I could find) and the only non-comments
in
> 10-mail.conf are
> ---
> mail_location = maildir:%h
> mail_privileged_group = mail
> ---
>
> So yes, no namespaces are explicitly defined/declared.
>
>
> The 2.3.4.1 version wrongly creates a maildirfolder file in the home
> directory (maildir root), preventing exim from correctly creating/using
> maildirsize.
>
> a) Is this expected behavior and can it be changed?
> b) How can I disable inbox auto-creation if a) doesn't pan out?
>
> Thanks,
>
> Christian

Hello,

On Wed, 5 Feb 2020 08:58:29 +0200 Aki Tuomi wrote:
> Can you provide full doveconf -n output? Also how are you delivering mail?
>
As pretty much implied, Exim is delivering mails, w/o problems.
And if it gets to create the home directory, everything is fine
and maildirsize gets put there.

But if the first access is via the newer dovecot the bogus maildirfolder
file gets created in the home directory and prevents Exim (and itself?)
from putting a maildirsize there.

My bet is that that something in the auto-create logic changed or the
"mail_home" needing to be set explicitly instead of defaulting to
mail_location if unset, etc.

Redacted and relevant parts only: 
---
# 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.4 ()
# OS: Linux 4.19.0-6-amd64 x86_64 Debian 10.2 
# Hostname: testbox.gol.com
auth_default_realm = gol.com
default_client_limit = 16384
default_process_limit = 1024
first_valid_uid = 8
imap_hibernate_timeout = 30 secs
imap_idle_notify_interval = 8 mins
imap_logout_format = in=%i out=%o head=<%{fetch_hdr_count}>
del=<%{deleted}> exp=<%{expunged}> trash=<%{trashed}>
session=<%{session}>
login_trusted_networks = some.net.work
mail_gid = 8
mail_location = maildir:%h
mail_privileged_group = mail
mail_uid = 8
mailbox_idle_check_interval = 1 mins
maildir_very_dirty_syncs = yes

passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  quota = maildir:User
  quota_rule = ?:storage=200M
  quota_rule2 = Trash:storage=+50M
  sieve = file:~/sieve;active=~/.dovecot.sieve
}

userdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
verbose_proctitle = yes
protocol imap {
  mail_max_userip_connections = 40
  mail_plugins = quota imap_quota
}
protocol pop3 {
  mail_plugins = quota
}
---

Regards,

Christian
> Aki
> 
> On 5.2.2020 4.24, Christian Balzer wrote:
> >
> > Hello,
> >
> > as the tin says.
> > I have several servers running 2.2.27 (Debian stretch) and am adding
new
> > ones with 2.3.4.1 (Debian buster).
> > The configs were upgraded where needed but neither 10-mail.conf nor
> > 15-mailboxes.conf were changed. 
> > 15-mailboxes is all commented out (I guess the default is auto-create,
> > which isn't documented anywhere I could find) and the only
non-comments in
> > 10-mail.conf are
> > ---
> > mail_location = maildir:%h
> > mail_privileged_group = mail
> > ---
> >
> > So yes, no namespaces are explicitly defined/declared.
> >
> >
> > The 2.3.4.1 version wrongly creates a maildirfolder file in the home
> > directory (maildir root), preventing exim from correctly
creating/using
> > maildirsize.
> >
> > a) Is this expected behavior and can it be changed?
> > b) How can I disable inbox auto-creation if a) doesn't pan out?
> >
> > Thanks,
> >
> > Christian  
> 

-- 
Christian Balzer        Network/Systems Engineer                
chibi at gol.com   	Rakuten Mobile Inc.