[Dovecot] Apple mail troubles

[David Warden]

On Oct 1, 2009, at 8:16 AM, Frank Bonnet wrote:

> Axel Luttgens wrote:
>> Le 1 oct. 2009 à 13:57, Frank Bonnet a écrit :
>>> Hello
>>>
>>> I have an Apple computer  user who has great problems
>>> using IMAP and Dovecot.
>>>
>>> Some same messages seems to stay in two or more folders
>>> and are impossible to erase from the Apple mail client
>>>
>>> Anyone has that kind of troubles ?
>> No.
>> Axel
>> PS: Perhaps could you tell us a bit more (client and server side),  
>> so that really helpful answers may be provided. ;-)
>
> Well OK
>
> If he try to read some messages with apple mail client some
> messages seems duplicated in several IMAP folders
>
> If I read those messages with mutt onto the server everything is clean
>
>
>

It sounds like your local caches in Mac Mail are confused if  
everything looks fine in Mutt. Try selecting a folder with duplicate  
messages and then hit Mailbox > Rebuild. That should delete the local  
cache for that folder and re-download all those messages, which should  
remove duplicates.

Did you recently switch from a different IMAP server to dovecot? The  
"double messages" problem usually happens when IMAP UIDs change on the  
server, and usually happens when you switch to dovecot from something  
else. We recently migrated from courier to dovecot and had to convert  
everyone's UIDs from courier to dovecot to ensure people didn't get  
double messages.

Of course, I have seen double messages in Mac Mail happen without a  
migration and it usually relates to a quota (filesystem, not IMAP  
quota) problem where clients try to delete a message and there's no  
room left to move it to the Trash folder. In that case you usually  
need to up the quota and rebuild that folder's local cache.

-David Warden