On Fri, 28 Mar 2025 13:13:24 +0100
Paul Neuwirth via Postfix-users <postfix-users@postfix.org> wrote:

> On Fri, 28 Mar 2025 22:03:40 +1100
> "Gary R. Schmidt via Postfix-users" <postfix-users@postfix.org> wrote:
> 
> > On 28/3/25 19:44, Paul Neuwirth via Postfix-users wrote:
> > [SNIP]  
> > > 
> > > I added the following to dovecot-config:
> > > conf.d/10-mail.conf:# used only with INBOX when either its initial
> > > creation or dotlocking fails. conf.d/10-mail.conf:# Rely on O_EXCL
> > > to work when creating dotlock files. NFS supports O_EXCL
> > > conf.d/10-mail.conf:dotlock_use_excl = yes conf.d/10-mail.conf:#
> > > Locking method for index files. Alternatives are fcntl, flock and
> > > dotlock. conf.d/10-mail.conf:# Dotlocking uses some tricks which
> > > may create more disk I/O than other locking
> > > conf.d/10-mail.conf:lock_method = dotlock conf.d/10-mail.conf:#
> > > dotlock: Create <mailbox>.lock file. This is the oldest and most
> > > NFS-safe conf.d/10-mail.conf:#  dotlock_try: Same as dotlock, but
> > > if it fails because of permissions or
> > > conf.d/10-mail.conf:mbox_write_locks = dotlock fcntl
> > > 
> > > error message still present - but the issue seems to be resolved.
> > > flooded my mailbox with command mail and did imap lists
> > > simultaneously. hope this was it.
> > >     
> > 
> > Are you running IMAP with the file storage accessed via NFS?
> > 
> > Because that's one of the things that will have Mark Crispin
> > spinning in his grave - he considered it the worst ways to do
> > things.
> > 
> > And it will explain your file-system problems.
> > 
> >     Cheers,
> >             Gary    B-)
> 
> Also I use NFS a lot, it is neither on a NFS mount nor exported.
> 
> The issue seems to be gone. Hmm. I did one config change in postfix,
> which could correlate with the start of the issue.
> in main.cf I changed compatibility_level to 2 (previous non-existant)
> and added localhost to mydestination.
> 
> But since I did the modifications in dovecot config, everythings seems
> to be fine.
> 
> Greetings
> 
> Paul

unfortunately problem is not resolved.
same as before again
29 mails in queue.

I thought about migrating to mbox-layout (i think it's called so, with
each e-mail being a single file). Does it use the same locking
mechanism?
Must check first if I do not reach inode limit..
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