[Dovecot] Corrupted Mail?

[Patrick De Zordo]

> -----Ursprüngliche Nachricht-----
> Von: dovecot [mailto:dovecot-bounces at dovecot.org] Im Auftrag von Arthur
> Dent
> Gesendet: Dienstag, 27. Mai 2014 16:29
> An: dovecot at dovecot.org
> Betreff: Re: [Dovecot] Corrupted Mail?
> 
> On Tue, 2014-05-27 at 16:09 +0200, Robert Schetterer wrote:
> > Am 27.05.2014 16:04, schrieb Arthur Dent:
> > > On Tue, 2014-05-27 at 15:44 +0200, Robert Schetterer wrote:
> > >> Am 27.05.2014 14:56, schrieb Arthur Dent:
> > >>> Hello All,
> > >>>
> > >>> I have a Dovecot v2.2.12 installation running on a Fedora 20 box
> > >>> which is the mailserver for my family. This means that it is
> > >>> serving only 4 accounts.
> > >>>
> > >>> I use fetchmail->procmail to feed Dovecot and I read my mail on
> > >>> clients such as Evolution on (another) Fedora 20 machine,
> > >>> iPad/iPhone or squirrelmail on the web (running on the same Fedora
> 20 server).
> > >>>
> > >>> The average mail throughput for the whole family is around a
> > >>> couple of hundred messages per day, but each (and every) day I get
> > >>> between 3 and
> > >>> 10 of the following messages:
> > >>>
> > >>> dovecot: imap(mark): Error: Next message unexpectedly corrupted in
> > >>> mbox file /home/mark/mail/MLists/Fail2Ban at 3407473: 1 Time(s)
> > >>>
> > >>> I have googled, but with little success. What I have found seemed
> > >>> to suggest that removing the .index files and allowing Dovecot to
> > >>> rebuild them will solve this. I did:
> > >>> find /home -type f -name "dovecot.index.*" -exec rm -f {} \; but
> > >>> it has made no difference.
> > >>>
> > >>> Can anyone help me solve this please?
> > >>
> > >> at this small setup simply use maildir as format and use getmail to
> > >> fetch, sieve may do sorting
> > >>
> > >> see
> > >> https://sys4.de/de/blog/2013/04/12/abholdienst-fur-mail/
> > >>
> > >> sorry german but setup should speak for its own
> > >>
> > >> getmail does also deliver into maildir directly ( without dovecot
> > >> deliver ) if you dont need to sort through sieve
> > >
> > > Well thanks - but I have been using an mbox setup for about 10
> > > years. It is only since I upgraded to F20 that I have been
> > > experiencing this problem. I may look at switching to maildir for
> > > the future, but for now that's too big a job...
> > >
> > > Any other ideas?
> > >
> > > Thanks
> > >
> > > Mark
> > >
> >
> > http://wiki2.dovecot.org/MboxProblems
> 
> OK - Unless I'm missing something, all that page (which I'd already
> read) tells me is that I may have to delete the dovecot.index file(s) - which
> I've don (several times). I still have the same problem. Every single day.
> 
> Anything else?

You would *really* not change do Maildir format?
It's not so difficult to switch over.. and you will have working and simple mailfolders.. (also backup and restore would be a simple task)..

So, why won't you change at all?