determine why mail clients download mails 2nd time

Poliman - Serwis serwis at
Thu Nov 29 10:46:53 EET 2018

pon., 26 lis 2018 o 09:25 Aki Tuomi <aki.tuomi at> napisał(a):

> On 26.11.2018 10.01, Poliman - Serwis wrote:
> I have strange problem. In last Friday I had a problem with dovecot. It
> didn't see directories with mailboxes in /var/vmail. Somehow it crashed
> because probably two things (a lot of this type of lines in mail.err file):
> *Nov 23 07:05:02 s1 dovecot: lda(poli at <poli at>): Error: User
> initialization failed: Initializing mail storage from mail_location setting
> failed: mkdir(/var/vmail/
> <>) failed: Permission denied (euid=5000(vmail)
> egid=5000(vmail) missing +w perm: /var/vmail, dir owned by 0:0 mode=0755)*
> /var/vmail is not owned by vmail:vmail, which I think it should be in your
> configuration.
Thank you for answer. Strange thing, because it is owned by vmail:vmail,
please take a look:
*drwxrwx--- 46 vmail vmail  4096 Aug 22 11:52 vmail*
I have /var/vmail directory binded to /var/vmail on secondary disk. Maybe
from some reason entry in /etc/fstab crashed? It happened after restart

> and maybe
> *Nov 12 09:27:59 s1 dovecot: imap(artur at
> <artur at>): Error: Corrupted index cache file
> /var/vmail/
> <>: Broken MIME
> parts for mail UID 559 in mailbox INBOX: Cached MIME parts don't match
> message during parsing: Cached header size mismatch (parts=) Nov 12
> 09:27:59 s1 dovecot: imap(artur at
> <artur at>): Error:
> unlink(/var/vmail/
> <>) failed: No
> such file or directory (in mail-cache.c:28)*
> and after this event probably all mailboxes download again all emails from
> 1.11 to 22.11. They were duplicated in mail clients.
> Unlikely that this causes all mailboxes to download all mails.
Honestly I am not sure that this was the reason of downloading emails
again. I am more sure that the first error "Permission denied" could do
Do you know what could cause above error "Error: corrupted index cache
file" and how to fix it? It was happened suddenly without any changes in
dovecot configuration

> --
> *Pozdrawiam / Best Regards *
> *Piotr Bracha*
> Also which version of dovecot is this?
root at s1:/var# dovecot --version
2.2.22 (fe789d2)

> Aki


*Pozdrawiam / Best Regards*
*Piotr Bracha*
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