Hi,
Thank you.
I configured mail home and mail location to point to different places: mail_home to /home/virtual0/%d/%n and, respectively, mail_location to maildir:/home/virtual0/%d/%n/Maildir
Now the initial error: "Error: lmtp-server: conn unix:pid=40487,uid=107 [22]: rcpt user@domain: stat(/home/virtual0/domain/user/.dovecot.lda-dupes/tmp) failed: Not a directory" does no longer appear in the mail log, but in the user home directory there is still this folder showing up .dovecot.lda-dupes.locks, but this time it is empty, it has no "/cur", "/tmp", "/new" directories.

# ls -lha /home/virtual0/domain/user
total 32K
drwx------ 5 vmail mail 8.0K Dec 6 09:19 .
drwx------ 4 vmail mail 152 Dec 6 08:50 ..
-rw------- 1 vmail mail 568 Dec 6 09:19 .dovecot.lda-dupes
drwx------ 2 vmail mail 152 Dec 6 09:19 .dovecot.lda-dupes.locks
lrwxrwxrwx 1 vmail mail 23 Dec 6 08:33 .dovecot.sieve -> sieve/sieve.sieve.sieve
-rw------- 1 vmail mail 323 Dec 6 09:19 .dovecot.svbin
drwxr-xr-x 10 vmail mail 8.0K Dec 6 09:20 Maildir
drwx------ 3 vmail mail 152 Dec 6 09:18 sieve

Aurel

On Fri, Dec 3, 2021 at 9:11 AM Aki Tuomi <aki.tuomi@open-xchange.com> wrote:

Hi Adrian, Aurel.

I am not sure why Adrian consider that .dovecot.lda-dupes would have been changed like this?

Your problem is that you have configured mail home and mail location to point to same place, causing dovecot to consider .dovecot.lda-dupes as a maildir folder.

This is a very common misconfiguration, which leads into exactly this kind of issues.

The recommended configuration is to configure mail_location=maildir:~/mail to avoid this issue.

Aki

> On 02/12/2021 20:42 Adrian Minta <adrian.minta@gmail.com> wrote:
>
>
> Hi Aurel,
> apparently before 2.3.17 '.dovecot.lda-dupes' and '.dovecot.lda-dupes.lock' where files, but starting with this release they are full folders with cur/new/tmp in them.
>
> Don't know if this is a bug or something is missing from the docs.
>
> On 12/2/21 1:55 PM, Aurel Mihai wrote:
>
> > Hello,
> >
> > after upgrade to version 2.3.17, we enconter a lot of errors, such as:
> >
> >
> > Dec 2 13:41:22 mail5 dovecot: lmtp(user@domain)<41944><EFw6IuKwqGHYowAAF7/xgA>: Error: lmtp-server: conn unix:pid=40487,uid=107 [22]: rcpt user@domain: stat(/home/virtual0/domain/user/.dovecot.lda-dupes/tmp) failed: Not a directory
> >
> >
> >
> >
> >
> >
> > Any help please?
> >
> > Aurel
> >
> >
> >
> >
> --
> Best regards,
> Adrian Minta
>
>
>