[Dovecot] failed: Message has been copied too many times

[Joseba Torre]

El 28/10/13 10:46, Angel L. Mateo escribió:
>
>      The problem is that for some reason, dovecot is duplicating user
> mails. In the problem I'm having today, a user has 3833 distinct
> messages in a mailbox, but 122 of them are duplicated 19866 each, so a
> search in the folder shows 2228712 messages. A force-resync of the
> folder doesn't fix anything.
>
>      What worried me the most is that this problem is appearing very
> often in my system (once a week at least).
>

Are you sure it's dovecot who is duplicating emails? I have seen this 
before (not so many copies, but the same effect) and I've always thought 
it was a thunderbird thing (in every case I've seen the client was 
thunderbird, and I think your users also use it).

I've always solved with the thunderbird function to remove duplicates.

HTH