[Dovecot] mbox sync problem [was: Urgent problem: Dovecot fetches the same mails multiple times per POP]

[Timo Sirainen]

On 10.1.2011, at 18.28, Andi Meier wrote:

> The problem in my OP seems to be this log message:
> 
>  mbox sync: UID inserted in the middle of mailbox /var/mail/office (3938 > 3918, seq=2, idx_msgs=10)
> 
> which appears from time to time. Every time it occurs, all mails are fetches again.

Yep.

> I guess that's because all X-UID have now been replaced and the E-Mail Client (or Dovecot itself??) thinks they are all new.

Dovecot thinks that. http://wiki.dovecot.org/MboxProblems talks about the possible reasons.

> What can I do about this? How can I diagnose this?
> 
>> Dovecot version is 1.0.15 on Debian Lenny.

It's also possible that there's a bug that causes this. You could try v1.2 from Debian backports.

And finally, one sure way to get rid of mbox problems is to switch to maildir.